21,774 results match your criteria Bioresource technology[Journal]


The variation on nitrogen removal mechanisms and the succession of ammonia oxidizing archaea and ammonia oxidizing bacteria with temperature in biofilm reactors treating saline wastewater.

Bioresour Technol 2020 Jul 1;314:123760. Epub 2020 Jul 1.

Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China. Electronic address:

To reveal nitrogen removal mechanisms under environmental stresses, biofilm reactors were operated at different temperatures (10 °C-35 °C) treating saline wastewater (salinity 3%). The results showed nitrogen removal efficiency was 98.46% at 30 °C and 60. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123760DOI Listing

In-situ membrane fouling control by electrooxidation and microbial community in membrane electro-bioreactor treating aquaculture seawater.

Bioresour Technol 2020 Jun 17;314:123701. Epub 2020 Jun 17.

Dalian Ocean University, Dalian 116023, China; Key Laboratory of Environment Controlled Aquaculture, Ministry of Education, Dalian 116023, China. Electronic address:

Ammonia and nitrite in aquaculture recirculating seawater need to be strictly controlled to avoid deleterious effects on aquatic organisms. However, traditional biological approach can hardly meet the standard due to the short hydraulic retention time (HRT) and nitrite accumulation. A Membrane Electro-Bioreactor (MEBR) was developed for ammonia removal enhancement and in-situ electrochemical membrane fouling mitigation. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123701DOI Listing

Impact of feeding and stirring regimes on the internal stratification of microbial communities in the fermenter of anaerobic digestion plants.

Bioresour Technol 2020 Jun 13;314:123679. Epub 2020 Jun 13.

Max Planck Institute for Dynamics of Complex Technical Systems, Bioprocess Engineering, Sandtorstraße 1, 39106 Magdeburg, Germany. Electronic address:

In anaerobic digestion plants (ADs), homogenization of the feed, fermenter content and microbial communities is crucial for efficient and robust biogas production. However, mixing also requires a significant amount of energy. For an 850 m agricultural AD equipped with eight sampling ports, we investigated whether different feeding and stirring regimes enable a sufficient homogenization of the microbial community using metaproteomics and terminal restriction fragment length polymorphism (TRFLP) analysis. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123679DOI Listing

Microbial diversity and fermentation profile of red clover silage inoculated with reconstituted indigenous and exogenous epiphytic microbiota.

Bioresour Technol 2020 May 30;314:123606. Epub 2020 May 30.

Institute of Ensiling and Processing of Grass, College of Agro-Grassland Science, Nanjing Agricultural University, Nanjing 210095, China. Electronic address:

The study investigated the effects of transplantation and reconstitution of indigenous and exogenous epiphytic microbiota on the fermentation quality and microbial community of red clover silage. Sterile red clover was inoculated with distilled water (RC0), extracted epiphytic microbiota of red clover (RC), maize (MZ), and sorghum (SG). RC inoculation rapidly decreased pH at the onset of ensiling. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123606DOI Listing

In-situ catalytic pyrolysis upgradation of microalgae into hydrocarbon rich bio-oil: Effects of nitrogen and carbon dioxide environment.

Bioresour Technol 2020 Jul 1;314:123758. Epub 2020 Jul 1.

Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045,China.

Pyrolysis of Spirulina Platensis (SP) microalgae was carried out under different reaction environment such as nitrogen (N) and carbon dioxide (CO) at different reaction temperatures of 300, 350, 400, 450 and 500 °C. Catalytic upgradations were examined over solid acid (ZSM-5) and solid base (MgO) catalyst, and with ZSM-5-MgO catalysts mixtures. Results showed, pyrolysis of non-catalytic biomass yielded maximum bio-oil of 43. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123758DOI Listing

Syngas production from biomass pyrolysis in a continuous microwave assisted pyrolysis system.

Bioresour Technol 2020 Jul 1;314:123756. Epub 2020 Jul 1.

Center for Biorefining and Department of Bioproducts and Biosystems Engineering, University of Minnesota, 1390 Eckles Ave., St. Paul, MN 55108, USA. Electronic address:

In light of the knowledge gap in the scale-up of microwave-assisted pyrolysis technology, this study developed a continuous microwave-assisted pyrolysis (CMAP) system and examined its feasibility for syngas production. Wood pellets were pyrolyzed in the system under various temperatures, and the product distribution and energy efficiency were investigated. At a processing temperature of 800 °C, the CMAP system obtained a high quality producer gas (lower heating value 18. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123756DOI Listing

A novel CO steady feeding based on the pH steady strategy data in the Haematococcus pluvialis cultivation to maximize the cell growth and carbon bio-sequestration.

Bioresour Technol 2020 Jun 28;314:123752. Epub 2020 Jun 28.

Microbial Biotechnology Department, Agricultural Biotechnology Research Institute of Iran (ABRII), Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran. Electronic address:

Two common strategies to feed the CO are pH steady (PS) and CO steady (CS). An innovative strategy called ''CSBPS (CS feeding based on PS data)" in comparison to the 0.04% CS, 5% CS, and PS approaches improved the Haematococcus pluvialis growth and carbon bio-sequestration. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123752DOI Listing

Inductively coupled plasma nanosilica based growth method for enhanced biomass production in marine diatom algae.

Bioresour Technol 2020 Jun 29;314:123747. Epub 2020 Jun 29.

Diatom Research Laboratory, Amity Institute of Biotechnology, Amity University, Noida, Uttar Pradesh 201 313, India. Electronic address:

This work reports a novel solution-based method to trigger the growth of diatoms for enhanced biomass production, which can efficiently stimulate their applications in nutraceuticals, aquaculture and wastewater remediation. The optimization for the growth of three marine diatoms species was performed using inductively coupled plasma (ICP) synthesized nanosilica which can be a cost-effective and productive method for biomass production. The exponential growth phase was achieved in 14 days with high biomass productivity compared to F/2-Si Media [Chaetoceros sp. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123747DOI Listing

Carbamazepine removal from wastewater and the degradation mechanism in a submerged forward osmotic membrane bioreactor.

Bioresour Technol 2020 Jun 25;314:123732. Epub 2020 Jun 25.

Tsinghua-Berkeley Shenzhen Institute, Shenzhen 518071, China; Department of Civil and Environmental Engineering, University of California, Berkeley, CA 94720, USA.

A submerged forward osmotic membrane bioreactor (FOMBR) was used to reveal the removal and degradation mechanism of carbamazepine (CBZ) from wastewater. The results showed that the removal mechanism consisted of the rejection of the forward osmotic (FO) membrane and biodegradation of the activated sludge. The removal efficiencies of COD, NH-N, and CBZ by the FOMBR were approximately 94. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123732DOI Listing

Dark fermentative hydrogen production from hydrolyzed sugar beet pulp improved by iron addition.

Bioresour Technol 2020 Jun 24;314:123713. Epub 2020 Jun 24.

Department of Environmental Biotechnology, Faculty of Biotechnology and Food Science, Lodz University of Technology, Wolczanska 171/173, 90-924 Lodz, Poland.

This study evaluated the impact of three different iron compounds (FeO, FeSO, FeCl) on hydrogen production via mesophilic dark fermentation (DF) of hydrolyzed sugar beet pulp (SBP). In batch tests, the maximum hydrogen yield of over 200 dmH/kgVS was achieved with the addition of 0.1 gFeO/dm, which was twice greater than the control. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123713DOI Listing

Response of process performance and microbial community to ammonia stress in series batch experiments.

Bioresour Technol 2020 Jun 30;314:123768. Epub 2020 Jun 30.

Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China. Electronic address:

To further clarify the key stage and microorganisms responsible for ammonia inhibition instability, three sequential batch experiments were conducted with various ammonia concentrations and different exposure modes. Acetate metabolism was most sensitive to ammonia, however, after continuous ammonia exposure, acetate metabolism was well restored by a shift in dominant microorganisms. In contrast, the metabolism of longer-chain volatile fatty acids (LCVFAs, C-C) was only inhibited under a high ammonia concentration (≥6000 mg/L), however, once inhibited, continuous exposure neither restored the abundance of functional microbes nor induced new microorganisms to perform metabolic functions. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123768DOI Listing

A new whole-cell biocatalyst for sulfur dioxide filtering and degradation.

Bioresour Technol 2020 Jun 30;314:123755. Epub 2020 Jun 30.

Department of Chemistry, College of Science, Shiraz University, Shiraz, Iran. Electronic address:

In this study, the interaction of the magnetotactic bacterium with sulfite compounds and their potential to degrade SO was investigated using cyclic voltammetry (CV), molecular emission cavity analysis (MECA) and ion-exchange chromatography (IEC). This biofilter was able to degrade SO up to 22281 mg m by disproportionation reaction and the formation of S and SO with ≥99% efficiency. Designed biofilter was able to restart the initial performance at least after seven cycles if it was used at 14-day intervals. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123755DOI Listing

Recycling application of waste long-root Eichhornia crassipes in the heavy metal removal using oxidized biochar derived as adsorbents.

Bioresour Technol 2020 Jun 27;314:123749. Epub 2020 Jun 27.

National Engineering Research Center for Integrated Utilization of Salt Lake Resources, East China University of Science and Technology, Shanghai 200237, China; State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China.

An oxidized biochar was prepared using long-root Eichhornia crassipes through an aerobic/anaerobic hybrid calcination to recycle its waste plants after eutrophic treatments. The adsorption performances of the biochar were investigated and the results showed that the adsorption equilibrium could arrive in 30 min and the adsorption capacities for Pb, Cu, Cd and Zn at 30 °C were 0.57, 0. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123749DOI Listing

Role of magnetite in methanogenic degradation of different substances.

Bioresour Technol 2020 Jun 23;314:123720. Epub 2020 Jun 23.

Institution of Environment Pollution Control and Treatment, Department of Environmental Engineering, Zhejiang University, Hangzhou 310058, China; Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety, Hangzhou 310058, China; Zhejiang Provincial Engineering Laboratory of Water Pollution Control, 388 Yuhangtang Road, Hangzhou 310058, China. Electronic address:

For better understanding the role of magnetite in methanation of different substrates, two up-flow anaerobic sludge bed reactors (RM with magnetite; RS with silica) were built using acetate (stage I), propionate + butyrate (stage II), and sucrose (stage III) as the substrates, respectively. RM reactor showed better COD removal efficiency and adaptability to different substrate impacts. More extracellular polymeric substances (EPS) were produced for anaerobic sludge granulation, and the sludge in RM had better intensity, hydrophobicity and electroactivity compared with those in RS. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123720DOI Listing

Evaluating responses of nitrification and denitrification to the co-selective pressure of divalent zinc and tetracycline based on resistance genes changes.

Bioresour Technol 2020 Jun 30;314:123769. Epub 2020 Jun 30.

Liaoning Provincial Ecology and Environment Protection Science and Technology Center, Shenyang, China.

The responses of nitrification and denitrification to the divalent zinc (Zn(II)) and tetracycline (TC) co-selective pressure were evaluated in a sequencing batch reactor (SBR). The removal rates of organics and nitrogen, nitrifying and denitrifying enzymatic activity, and microbial diversity and richness at the Zn(II) and TC co-selective pressure were higher than those at the alone Zn(II) selective pressure, while were lower than those at the individual TC selective pressure. The Zn(II) and TC co-selective pressure induced the TC resistance genes abundance increase and the Zn(II) resistance genes levels decrease, and enhanced bacterial enzymatic modification resistance to TC and bacterial outer membrane resistance to Zn(II). Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123769DOI Listing

Impact of dilute acid pretreatment conditions on p-coumarate removal in diverse maize lines.

Bioresour Technol 2020 Jun 28;314:123750. Epub 2020 Jun 28.

Department of Chemical & Biological Engineering, Montana State University, Bozeman, MT 59717, United States; Division of Sustainable Process Engineering, Luleå University of Technology, Luleå 97187, Sweden. Electronic address:

Prior work has identified that lignins recovered from dilute acid-pretreated corn stover exhibit superior performance in phenol-formaldehyde resins used in wood adhesive applications when compared to diverse process-modified lignins derived from other sources. This improved performance is hypothesized to be due to the higher content of unsubstituted phenolic groups specifically p-coumarate lignin esters. In this work, a diverse set of corn stover samples are employed that exhibit diversity in p-coumarate content and total lignin content to explore the relationship between dilute acid pretreatment conditions, p-coumarate ester hydrolysis, xylan solubilization, and the resulting glucose enzymatic hydrolysis yields. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123750DOI Listing

Anaerobic co-digestion of hydrolysate from anaerobically digested sludge with raw waste activated sludge: Feasibility assessment of a new sewage sludge management strategy in the context of a local wastewater treatment plant.

Bioresour Technol 2020 Jun 27;314:123748. Epub 2020 Jun 27.

Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan; Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan.

Sustainable sewage sludge management is a worldwide issue in wastewater treatment plants (WWTPs). This work developed a new strategy for sewage sludge treatment involving the integration of hydrothermal treatment (HT) with anaerobic co-digestion (AcoD), particularly on the feasibility of mesophilic AcoD of anaerobically digested sludge (DS) hydrolysate and waste activated sludge (WAS). Results show that AcoD of DS hydrolysate from HT 170℃ for 30 min with WAS achieved the highest CH production of 205. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123748DOI Listing

Production of tailor-made fatty acids from crude glycerol at low pH by Yarrowia lipolytica.

Bioresour Technol 2020 Jun 26;314:123746. Epub 2020 Jun 26.

Department of Biotechnology and Food Microbiology, Wrocław University of Environmental and Life Sciences, Chełmońskiego 37, Wrocław 51-630, Poland.

Nowadays, single cell oil (SCO) can play two distinct roles, first as a supplier of functional oils, and second as a feedstock for the biodiesel industry. These two distinct functions require a different fatty acids (FA) profile in the lipid pool. Moreover, to exploit their potential for industrialization, it is necessary to employ a low-cost substrate. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123746DOI Listing

Plasma gasification performances of various raw and torrefied biomass materials using different gasifying agents.

Bioresour Technol 2020 Jun 27;314:123740. Epub 2020 Jun 27.

Department of Chemical Engineering, National Cheng Kung University, Tainan 70101, Taiwan; Department of Chemical and Materials Engineering, Tunghai University, Taichung 407, Taiwan; Research Center for Smart Sustainable Circular Economy, Tunghai University, Taichung 407, Taiwan.

Plasma gasification of raw and torrefied woody, non-woody, and algal biomass using three different gasifying agents (air, steam, and CO) is conducted through a thermodynamic analysis. The impacts of feedstock and reaction atmosphere on various performance indices such as syngas yield, pollutant emissions, plasma energy to syngas production ratio (PSR), and plasma gasification efficiency (PGE) are studied. Results show that CO plasma gasification gives the lowest PSR, thereby leading to the highest PGE among the three reaction atmospheres. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123740DOI Listing

Hydrothermal carbonization coupled with anaerobic digestion for the valorization of the organic fraction of municipal solid waste.

Bioresour Technol 2020 Jun 24;314:123734. Epub 2020 Jun 24.

Department of Civil, Environmental and Mechanical Engineering, University of Trento, Trento, Italy.

Hydrothermal carbonization (HTC) was evaluated as a promising treatment to enhance the biomethane potential during anaerobic digestion (AD) of the organic fraction of municipal solid waste (OFMSW). The OFMSW was carbonized at different conditions and HTC products were tested for biomethane potential into AD. Results proved that the use of HTC liquid and slurry into AD led to an increase in biomethane production up to 37% and 363%, respectively, compared to OFMSW. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123734DOI Listing

Volatile fatty acids production from biowaste at mechanical-biological treatment plants: Focusing on fermentation temperature.

Bioresour Technol 2020 Jun 24;314:123729. Epub 2020 Jun 24.

Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, 08028 Barcelona, Spain; Water Research Institute (IdRA), University of Barcelona, 08001 Barcelona, Spain.

The impact of temperature (20, 35, 45, 55, 70 °C) on volatile fatty acid (VFA) production from biowaste collected at a mechanical-biological treatment plant was analysed. Additionally, relevant streams of the treatment plant were characterised to assess seasonality effects and conceive the integration of a fermentation unit. Batch fermentation tests at 35 °C showed the highest VFA yields (0. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123729DOI Listing

Metabolically engineering of Yarrowia lipolytica for the biosynthesis of naringenin from a mixture of glucose and xylose.

Bioresour Technol 2020 Jun 24;314:123726. Epub 2020 Jun 24.

Laboratory of Biosystems and Microanalysis, State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China; Institute of Engineering Biology and Health, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China. Electronic address:

Xylose-inducible modules simultaneously expressing xylose utilization and naringenin biosynthesis pathways were developed in Yarrowia lipolytica to produce naringenin from a mixture of glucose and xylose. The naringenin synthetic pathway was constructed using a constitutive expression to yield 239.1 ± 5. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123726DOI Listing

Comparative study of biorefinery processes for the valorization of fast-growing Paulownia wood.

Bioresour Technol 2020 Jun 24;314:123722. Epub 2020 Jun 24.

Center of Biological Engineering, University of Minho. Campus of Gualtar, 4710 057 Braga, Portugal.

In this work, valorization of Paulownia wood (PW) was proposed following several process configurations for biofuels and value-added compounds production. Firstly, autohydrolysis and ethanol-organosolv strategies were assessed separately for the fractionation of PW to enhance the enzymatic digestibility of cellulose. A third strategy focused on a sequential process (autohydrolysis and organosolv) was explored. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123722DOI Listing

Elucidating temperature on mixotrophic cultivation of a Chlorella vulgaris strain: Different carbon source application and enzyme activity revelation.

Bioresour Technol 2020 Jun 21;314:123721. Epub 2020 Jun 21.

Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.

With depletion of fossil fuel, microalgae is considered as a promising substitute due to high growth rate, efficient cost and high biofuels content. This study investigated the effect of temperature on mixotrophic cultivation of Chlorella vulgaris. In addition, the combination carbon source of inorganic (HCO or CO) and organic (glucose or acetate) for microalgae cultivation was evaluated to obtain the optimum carbon source for mixotrophic cultivation. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123721DOI Listing

Mainstream partial nitritation/anammox with integrated fixed-film activated sludge: Combined aeration and floc retention time control strategies limit nitrate production.

Bioresour Technol 2020 Jun 24;314:123711. Epub 2020 Jun 24.

Research Group of Sustainable Energy, Air and Water Technology, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, Belgium. Electronic address:

Implementation of mainstream partial nitritation/anammox (PN/A) can lead to more sustainable and cost-effective sewage treatment. For mainstream PN/A reactor, an integrated fixed-film activated sludge (IFAS) was operated (26 °C). The effects of floccular aerobic sludge retention time (AerSRT), a novel aeration strategy, and N-loading rate were tested to optimize the operational strategy. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123711DOI Listing

Nitrite removal with potential value-added ingredients accumulation via Chlorella sp. L38.

Bioresour Technol 2020 Jun 27:123743. Epub 2020 Jun 27.

Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1, Tennodai, Tsukuba, Ibaraki, 305-8572, Japan.

Nitrite removal is necessary and significant for pickle and meat processing wastewater. In this study, Chlorella sp. L38 is used as an alternative to remove nitrite and reuse it as nitrogen source for potential value-added ingredients production. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123743DOI Listing

Methanogenic pathway and microbial succession during start-up and stabilization of thermophilic food waste anaerobic digestion with biochar.

Bioresour Technol 2020 Jun 28;314:123751. Epub 2020 Jun 28.

Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, S117576 Singapore, Singapore; NUS Environment Research Institute, National University of Singapore, 5A Engineering Drive 1, Singapore 117411, Singapore. Electronic address:

One of the major obstacles for thermophilic anaerobic digestion is the process instability during start-up. This study proposed the use of a cost-effective additive, biochar, to accelerate and stabilize the start-up of thermophilic semi-continuous food waste anaerobic digestion. The results showed that the reactors with biochar addition resulted in up to 18% higher methane yield as compared to the control reactors (without biochar). Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123751DOI Listing

Acceleration of biofilm formation in start-up of sequencing batch biofilm reactor using carriers immobilized with Pseudomonas stutzeri strain XL-2.

Bioresour Technol 2020 Jun 26;314:123736. Epub 2020 Jun 26.

Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, PR China.

P. stutzeri strain XL-2 initially immobilized on polypropylene carriers accelerated the biofilm formation in start-up of sequencing batch biofilm reactor (SBBR) (denoted R1). The biofilm formation in R1 was approximately completed in 36 days, which was shorter than that of 48 days in an identical SBBR (denoted R2) without strain XL-2. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123736DOI Listing

High yield self-nitrogen-oxygen doped hydrochar derived from microalgae carbonization in bio-oil: Properties and potential applications.

Bioresour Technol 2020 Jun 24;314:123735. Epub 2020 Jun 24.

College of Materials and Energy in South China Agricultural University, Guangzhou 510640, China. Electronic address:

In this work, the high yield self-N-O doped hydrochar had been prepared through the hydrothermal carbonization of microalgae in the aqueous bio-oil. The effects of temperature, residence time and the ratio of Chlorella and bio-oil on the solid yield were investigated. The results showed that the hydrochar had excellent thermal stability and abundant nitrogen and oxide functional groups, its solid yield reached 199. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123735DOI Listing

Denitrification strategies of strain YSF15 in response to carbon scarcity: Based on organic nitrogen, soluble microbial products and extracellular polymeric substances.

Bioresour Technol 2020 Jun 24;314:123733. Epub 2020 Jun 24.

School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.

This paper aims to determine the denitrification strategies of strain YSF15 in carbon scarcity condition from novel view of organic nitrogen, soluble microbial products (SMP) and extracellular polymeric substances (EPS). The batch tests demonstrated that strain YSF15 could achieve complete denitrification at C/N of 3.0. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123733DOI Listing

Vermiremediation of cotton textile sludge by Eudrilus eugeniae: Insight into metal budgeting, chromium speciation, and humic substance interactions.

Bioresour Technol 2020 Jun 28;314:123753. Epub 2020 Jun 28.

Soil and Agro Bio-engineering Lab, Department of Environmental Science, Tezpur University, Tezpur 784 028, India. Electronic address:

Information on prospective metal remediation by Eudrilus eugeniae during vermicomposting of cotton textile sludge (CTS) is rather scarce. This investigation, therefore, evaluates the sanitization efficiency of this species in CTS and CTS + cow-dung (CD) based feedstocks against aerobic composting. Accordingly, reduction in Pb, Cd, Cr, and Zn concentrations was between 50 and 70% under vermicomposting. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123753DOI Listing

Novel strategy for relieving acid accumulation by enriching syntrophic associations of syntrophic fatty acid-oxidation bacteria and H/formate-scavenging methanogens in anaerobic digestion.

Bioresour Technol 2020 Jun 17;313:123702. Epub 2020 Jun 17.

Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China. Electronic address:

Aiming at relieving acid accumulation in anaerobic digestion (AD), syntrophic associations of syntrophic fatty acid-oxidation bacteria and H/formate-scavenging methanogens were enriched by feeding propionate, butyrate and formate in an up-flow anaerobic sludge blanket (UASB) reactor. Results showed that methane yield increased by 50% with increasing formate concentration (0-2000 mg COD/L). In addition, the abundance and quantity of SFOB (Syntrophobacter, Smithella and Syntrophomonas) and H/formate-scavenging methanogens (Methanobacteriales and Methanomicrobiales) were increased after microbial acclimation. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123702DOI Listing

Carbon monoxide conversion and syngas biomethanation mediated by different microbial consortia.

Bioresour Technol 2020 Jun 25;314:123739. Epub 2020 Jun 25.

Department of Environmental Engineering, Technical University of Denmark, Kgs. Lyngby DK-2800, Denmark.

Syngas biomethanation is an attractive process for extending application of gasification products. In the present study, anaerobic sludges from three methanogenic reactors feeding cattle manure (CS), sewage sludge (SS) and gaseous H/CO (GS) were used to investigate the effect of microbial consortia composition on syngas biomethanation. The results showed that CS presented the highest CO consumption rate due to its highest relative abundance of CO consuming bacteria. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123739DOI Listing

Nitrogen transformation processes and mass balance in deep constructed wetlands treating sewage, exploring the anammox contribution.

Bioresour Technol 2020 Jun 25;314:123737. Epub 2020 Jun 25.

Malaviya National Institute of Technology, Jaipur, India.

This work was aimed to assess the contribution of classical nitrogen removal pathways in two deep constructed wetlands CW1 and CW2 located at Jaipur, India. Nitrogen mass balance revealed that 44.87% and 43. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123737DOI Listing

Molecular mechanisms underlying lignocellulose degradation and antibiotic resistance genes removal revealed via metagenomics analysis during different agricultural wastes composting.

Bioresour Technol 2020 Jun 25;314:123731. Epub 2020 Jun 25.

School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China. Electronic address:

In this study, the differences on the physico-chemical parameters, lignocellulose degradation, dynamic succession of microbial community, gene expression of carbohydrate-active enzymes and antibiotics resistance genes were compared during composting systems of bagasse pith/pig manure (BP) and manioc waste/pig manure (MW). The results revealed that biodegradation rates of organic matter, cellulose, hemicellulose and lignin (29.14%, 17. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123731DOI Listing

Impact of pyrochar and hydrochar derived from digestate on the co-digestion of sewage sludge and swine manure.

Bioresour Technol 2020 Jun 24;314:123730. Epub 2020 Jun 24.

Institute of Bioresource and Agriculture and Sino-Forest Applied Research Centre for Pearl River Delta Environment, Hong Kong Baptist University, Kowloon Tong, Hong Kong; Department of Biology, Hong Kong Baptist University, Hong Kong Special Administrative Region. Electronic address:

Four kinds of biochar were obtained by pyrolysis carbonization and hydrothermal carbonization from swine manure digestate, i.e. pyrochar (HC, HC-Fe) and hydrochar (HTC, HTC-Fe). Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123730DOI Listing

Astaxanthin biosynthesis promotion with pH shock in the green microalga, Haematococcus lacustris.

Bioresour Technol 2020 Jun 26;314:123725. Epub 2020 Jun 26.

Division of Environmental Science & Ecological Engineering, Korea University, Seoul 02841, Republic of Korea. Electronic address:

In this study, the use of pH shock to improve astaxanthin synthesis in Haematococcus lacustris was investigated. It has been found that pH shock (pH = 4.5, 60 s) imposes stress in the cells and induces physiological changes, which result in astaxanthin accumulation. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123725DOI Listing

Combustion parameters, evolved gases, reaction mechanisms, and ash mineral behaviors of durian shells: A comprehensive characterization and joint-optimization.

Bioresour Technol 2020 Jun 16;314:123689. Epub 2020 Jun 16.

Department of Chemical Engineering, Bolu Abant Izzet Baysal University, Bolu 14052, Turkey.

In this work, the characteristic parameters, evolved gases, reaction mechanisms, and ash conversions of the durian shell (DS) combustion were quantified coupling thermogravimetry, mass spectroscopy, Fourier transform infrared spectroscopy, and X-ray fluorescence spectra analyses. The main stage of the DS combustion occurred between 130.2 and 481. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123689DOI Listing

Robust nitrate removal and bioenergy generation with elucidating functional microorganisms under carbon constraint in a novel multianode tidal constructed wetland coupled with microbial fuel cell.

Bioresour Technol 2020 Jun 26;314:123744. Epub 2020 Jun 26.

Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, PR China.

This study investigated synthetic wastewater treatment under low inflow C/N ratio and characterized NO-N-transforming and electricity-producing bacteria in a multi-anode tidal constructed wetland-microbial fuel cell (TFCW-MFC). The optimal concurrent average removal rates of NH-N and NO-N were 73% and 78%, respectively, under a flood/rest/flood time of 4 h/2h/4h in "tide" mode accompanied by one recirculation. The lowest NO-N concentration among all anodes was observed when the electrode gap was 45 cm. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123744DOI Listing

Biochemical conversion of sugarcane bagasse into the alcohol fuel mixture of isopropanol-butanol-ethanol (IBE): Is it economically competitive with cellulosic ethanol?

Bioresour Technol 2020 Jun 24;314:123712. Epub 2020 Jun 24.

Laboratory of Optimization, Design, and Advanced Control - Fermentation Division (LOPCA-Ferm), School of Chemical Engineering, University of Campinas (UNICAMP), Campinas, SP, Brazil. Electronic address:

This work presents a techno-economic analysis of the production of isopropanol, butanol, and ethanol (IBE) from sugarcane bagasse using clostridia and compares IBE with cellulosic ethanol for the minimum selling price (MSP) and sustainability aspects. The MSPs of the fuels are similar (15 USD/GJ) provided that glucose and xylose are effectively utilized in both processes, and the IBE process is equipped with a genetically-modified Clostridium species with enhanced IBE yield and a highly productive continuous bioreactor with integrated product recovery. Notably, these technologies can reduce the size (from 23 × 3785-m to 3 × 3027-m fermentation tanks) and the wastewater footprint (from 50 to 10 m/m IBE) of the IBE plant. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123712DOI Listing

Preparation of nitrogen doped magnesium oxide modified biochar and its sorption efficiency of lead ions in aqueous solution.

Bioresour Technol 2020 Jun 21;314:123708. Epub 2020 Jun 21.

School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China. Electronic address:

A N-doped couping MgO-modified biochar (MgO-N-BC) was synthesized from corncob-to-xylose residue by two-step slow pyrolysis method. The biochar exhibited a remarkable Pb(II) sorption capacity (maximum 1429 mg·g) in aqueous solution. The sorption of Pb(II) onto MgO-N-BC best fitted Freundlich model and pseudo-second-order equation. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123708DOI Listing

Post treatment of swine anaerobic effluent by weak electric field following intermittent vacuum assisted adjustment of N:P ratio for oil-rich filamentous microalgae production.

Bioresour Technol 2020 Jun 23;314:123718. Epub 2020 Jun 23.

Center for Biorefining and Department of Bioproducts and Biosystems Engineering, University of Minnesota, St. Paul, MN 55108, United States. Electronic address:

A weak electric field (EF) was applied to decolorize the swine anaerobic effluent, which was followed by N:P ratio adjustment via intermittent-vacuum stripping (IVS) system for oil-rich filamentous microalgae Tribonema sp. cultivation. A higher electric field strength, higher temperature, and lower pH conditions showed higher efficiency in decolorization and nutrients removal during EF application. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123718DOI Listing

Insight into using up-flow anaerobic sludge blanket-anammox to remove nitrogen from an anaerobic membrane reactor during mainstream wastewater treatment.

Bioresour Technol 2020 Jun 20;314:123710. Epub 2020 Jun 20.

Key Lab of Environmental Engineering, Shaanxi Province, Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an 710055, PR China; International S&T Cooperation Center for Urban Alternative Water Resources Development, Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, No. 13 Yanta Road, Xi'an 710055, PR China. Electronic address:

A partial nitritation/anammox system treating the effluent of an anaerobic membrane bioreactor was investigated in this study with emphases on the nitrogen conversion and microbial dynamics along the up-flow anaerobic sludge blanket. An average total nitrogen concentration of 12.3 mg/L was achieved in effluent, which resulted in a total nitrogen removal efficiency of 75. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123710DOI Listing

Palm oil mill effluent as the pretreatment solvent of oil palm empty fruit bunch fiber for fermentable sugars production.

Bioresour Technol 2020 Jun 23;314:123723. Epub 2020 Jun 23.

Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia; Research Center for Sustainable Process Technology, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia.

Pretreatment is an essential upstream process to deconstruct oil palm empty fruit bunch fiber (OPEFBF) prior to sugars production. This study aimed to investigate the efficiency of OPEFBF pretreatment using palm oil mill effluent (POME) as solvent. The effect of alkali catalyst (5%w/w NaOH and ammonia), temperature (90,120,135 °C) and time (60,120,180 min) on the efficiency of pretreatment (OPEFBF-to-solvent ratio of 1:25) was also investigated. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123723DOI Listing

Pyrolysis of oil extracted safflower seeds: Product evaluation, kinetic and thermodynamic studies.

Bioresour Technol 2020 Jun 15;314:123699. Epub 2020 Jun 15.

Ondokuz Mayıs University, Faculty of Engineering, Chemical Engineering Department, 55139, Kurupelit, Samsun, Turkey. Electronic address:

In this study, pyrolysis kinetics and thermodynamic parameters of Safflower residues (SR) obtained from oil extraction were investigated by using TG/DSC-FTIR and py-GC/MS. Thermal analysis was performed from ambient temperature to 750 °C under a nitrogen atmosphere. The first-order reaction kinetics model was applied to thermal analysis data to determine apparent kinetic parameters. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123699DOI Listing

Co-hydrothermal carbonization of water hyacinth and polyvinyl chloride: Optimization of process parameters and characterization of hydrochar.

Bioresour Technol 2020 Jun 13;314:123676. Epub 2020 Jun 13.

Guangdong Province Key Laboratory of Efficient and Clean Energy Utilization, School of Electric Power, South China University of Technology, Guangzhou 510640, China; School of Electric Power, South China University of Technology, No. 381, Wushan Road, Tianhe District, Guangzhou 510640, China.

The co-hydrothermal carbonization (co-HTC) of water hyacinth (WH) and polyvinyl chloride (PVC) was investigated and the response surface methodology, which could deduce the interactions among process parameters and establish reliable mathematical models forecasting the behavior of output variables, was implemented to optimize process parameters, including reaction temperature (200-260 °C), residence time (30-90 min) and WH/PVC mixing ratios (0.5-2). Statistical analysis revealed that reaction temperature was the predominant parameter affecting hydrochar dechlorination efficiency, yield, calorific value, energetic recovery efficiency and electricity consumption. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123676DOI Listing

Metabolic engineering for increased lipid accumulation in Yarrowia lipolytica - A Review.

Bioresour Technol 2020 Jun 21:123707. Epub 2020 Jun 21.

College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, No. 30 South Puzhu Road, Nanjing 211816, People's Republic of China. Electronic address:

Current energy security and climate change policies encourage the development and utilization of bioenergy. Oleaginous yeasts provide a particularly attractive platform for the sustainable production of biofuels and industrial chemicals due to their ability to accumulate high amounts of lipids. In particular, microbial lipids in the form of triacylglycerides (TAGs) produced from renewable feedstocks have attracted considerable attention because they can be directly used in the production of biodiesel and oleochemicals analogous to petrochemicals. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123707DOI Listing

One-pot biosynthesis of furfuryl alcohol and lactic acid via a glucose coupled biphasic system using single Bacillus coagulans NL01.

Bioresour Technol 2020 Jun 18;313:123705. Epub 2020 Jun 18.

Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, People's Republic of China; College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, People's Republic of China. Electronic address:

Furfuryl alcohol is an important reduction product from biomass derived furfural. This study developed one-pot biosynthesis of furfuryl alcohol and lactic acid by a glucose coupled biphasic system using single Bacillus coagulans NL01. Water/dioctyl phthalate is chosen as biphasic system to alleviate the toxicity of furfural and furfuryl alcohol. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123705DOI Listing

Simultaneous nitrate and dissolved organic matter removal from wastewater treatment plant effluent in a solid-phase denitrification biofilm reactor.

Bioresour Technol 2020 Jun 23;314:123714. Epub 2020 Jun 23.

School of Resources and Environment, University of Jinan, Jinan 250022, PR China; Anhui Guozhen Environmental Protection Technology Joint Stock Co., Ltd, Hefei 230088, PR China. Electronic address:

In the present study, an up-flow solid-phase denitrification biofilm reactor (US-DBR) was established for simultaneous nitrate and dissolved organic matter (DOM) removal from wastewater treatment plant effluent. After 100 days operation, the nitrate and COD removal efficiencies were high of 97% and 80%, respectively. According to EEM-FRI analysis, aromatic and tryptophan protein-like, humic-like and fulvic acid-like substances were identified in DOM. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123714DOI Listing

Pyrolysis temperature influences the characteristics of rice straw and husk biochar and sorption/desorption behaviour of their biourea composite.

Bioresour Technol 2020 Jun 13;314:123674. Epub 2020 Jun 13.

Centre for Ocean Research, Sathyabama Institute of Science and Technology, Chennai 600 119, India.

Biochar obtained by biomass pyrolysis has several energies, environmental, and agricultural applications. In the present study, influence of pyrolysis temperatures (300 °C, 450 °C and 600 °C) on characteristics of rice residue biochar and sorption/desorption pattern of biourea was investigated. Biochar yield was reduced with the increasing temperature accompanied with increasing carbon content, pH, and electrical conductivity. Read More

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http://dx.doi.org/10.1016/j.biortech.2020.123674DOI Listing