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    Secondary effluent purification by a large-scale multi-stage surface-flow constructed wetland: A case study in northern China.
    Bioresour Technol 2017 Nov 2. Epub 2017 Nov 2.
    National Engineering Laboratory of Coal-Fired Pollutants Emission Reduction, Shandong University, Jinan 250061, PR China.
    Assessment of treatment performance in the large-scale constructed wetland (CW) for secondary effluent purification remains limited. The aim of this case study was to therefore to investigate the long-term treatment capacity of organics and ammonium pollutants in a large-scale multi-stage surface-flow (SF) CW fed with secondary effluents from the wastewater treatment plants (WWTPs) in northern China. The results for two-and-half-year study period indicated that the water quality parameters including chemical oxygen demand (COD) and ammonium (NH4(+)-N) met the Chinese Grade III of Environmental Quality Standards. Read More

    Mitigating external and internal cathode fouling using a polymer bonded separator in microbial fuel cells.
    Bioresour Technol 2017 Nov 4. Epub 2017 Nov 4.
    Department of Civil and Environmental Engineering, The Pennsylvania State University, University Park, PA 16802, United States. Electronic address:
    Microbial fuel cell (MFC) cathodes rapidly foul when treating domestic wastewater, substantially reducing power production over time. Here a wipe separator was chemically bonded to an activated carbon air cathode using polyvinylidene fluoride (PVDF) to mitigate cathode fouling and extend cathode performance over time. MFCs with separator-bonded cathodes produced a maximum power density of 190 ± 30 mW m(-2) after 2 months of operation using domestic wastewater, which was ∼220% higher than controls (60 ± 50 mW m(-2)) with separators that were not chemically bonded to the cathode. Read More

    Enhanced performance and kinetics of marine anammox bacteria (MAB) treating nitrogen-rich saline wastewater with Mn(II) and Ni(II) addition.
    Bioresour Technol 2017 Nov 4. Epub 2017 Nov 4.
    National Marine Environmental Forecasting Center, State Oceanic Administration, Beijing 100081, China.
    A sequencing batch reactor (SBR) was used to study nitrogen removal performance of marine anammox bacteria (MAB) with Mn(II) and Ni(II) addition. The reactor was operated at 25 ± 0.5 °C with influent pH of 7. Read More

    Targeted poly(3-hydroxybutyrate-co-3-hydroxyvalerate) bioplastic production from carbon dioxide.
    Bioresour Technol 2017 Nov 9;249:858-868. Epub 2017 Nov 9.
    Flemish Institute for Technological Research (VITO), Business Unit Separation and Conversion Technology, Boeretang 200, 2400 Mol, Belgium.
    A microbial production process was developed to convert CO2 and valeric acid into tailored poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) bioplastics. The aim was to understand microbial PHBV production in mixotrophic conditions and to control the monomer distribution in the polymer. Continuous sparging of CO2 with pulse and pH-stat feeding of valeric acid were evaluated to produce PHBV copolyesters with predefined properties. Read More

    Enhanced granulation and methane recovery at low load by downflow sludge circulation in anaerobic treatment of domestic wastewater.
    Bioresour Technol 2017 Oct 31;249:851-857. Epub 2017 Oct 31.
    School of Environmental Science and Engineering, Shandong University, Jinan 250100, China.
    The effects of downflow sludge circulation on granulation and methane recovery at low load were investigated for domestic wastewater treatment in a modified anaerobic reactor. Compared with conventional upflow anaerobic reactors, enhanced granulation with shortened start-up time was achieved and stable granules were successfully cultivated only after 58 days operations. The introduction of downflow sludge circulation resulted in reverse wastewater-sludge flow and uniform sludge distribution in the reaction zone, which contributed to enhanced wastewater-sludge mass transfer and satisfactory performance with a high soluble chemical oxygen demand (SCOD) removal efficiency of 94. Read More

    Accelerated removal of high concentration p-chloronitrobenzene using bioelectrocatalysis process and its microbial communities analysis.
    Bioresour Technol 2017 Oct 19;249:844-850. Epub 2017 Oct 19.
    Institute of Seawater Desalination and Multipurpose Utilization, State Oceanic Administration (SOA), Nankai District, Tianjin 300192, China.
    p-Chloronitrobenzene (p-CNB) is a persistent refractory and toxic pollutant with a concentration up to 200 mg/L in industrial wastewater. Here, a super-fast removal rate was found at 0.2-0. Read More

    Process simulation and economic assessment of hydrothermal pretreatment and enzymatic hydrolysis of multi-feedstock lignocellulose - Separate vs combined processing.
    Bioresour Technol 2017 Oct 27;249:835-843. Epub 2017 Oct 27.
    Department of Chemistry, Khalifa University of Science and Technology, Masdar Institute, Masdar City, P.O. Box 54224, Abu Dhabi, United Arab Emirates. Electronic address:
    Biorefinery based on multi-feedstock lignocellulose can be viable where a sustainable supply of a single substrate is limited, for example in arid regions. Processing of mixed feedstocks has been studied in lab scale, however, its economics are less studied. In this study, an economic comparison was made between separate and combined (mixed) processing approaches for multi-feedstock lignocellulose for the production of monomeric sugars. Read More

    Temperature-phased anaerobic digestion of food waste: A comparison with single-stage digestions based on performance and energy balance.
    Bioresour Technol 2017 Oct 26;249:826-834. Epub 2017 Oct 26.
    Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aoba, Aramaki-Aza, Aoba-Ku, Sendai, Miyagi 980-8579, Japan; Department of Frontier Science for Advanced Environment, Graduate School of Environmental Sciences, Tohoku University, 6-6-20 Aoba, Aramaki-Aza, Aoba-Ku, Sendai, Miyagi 980-8579, Japan. Electronic address:
    The temperature-phased anaerobic digestion (TPAD) of food waste was studied for the purpose of comparing with single-stage mesophilic and thermophilic anaerobic digestion. The biogas and methane yields in the TPAD during the steady period were 0.759 ± 0. Read More

    Deep eutectic solvent and inorganic salt pretreatment of lignocellulosic biomass for improving xylose recovery.
    Bioresour Technol 2017 Jul 29;249:818-825. Epub 2017 Jul 29.
    Department of Chemical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia.
    Deep eutectic solvents (DESs) have received considerable attention in recent years due to their low cost, low toxicity, and biodegradable properties. In this study, a sequential pretreatment comprising of a DES (choline chloride:urea in a ratio of 1:2) and divalent inorganic salt (CuCl2) was evaluated, with the aim of recovering xylose from oil palm fronds (OPF). At a solid-to-liquid ratio of 1:10 (w/v), DES alone was ineffective in promoting xylose extraction from OPF. Read More

    Analysis of a bio-electrochemical reactor containing carbon fiber textiles for the anaerobic digestion of tomato plant residues.
    Bioresour Technol 2017 Nov 3;249:809-817. Epub 2017 Nov 3.
    Environmental Chemistry Sector, Environmental Science Research Laboratory, Central Research Institute of Electric Power Industry (CRIEPI), Chiba, Japan.
    A bio-electrochemical system packed with supporting material can promote anaerobic digestion for several types of organic waste. To expand the target organic matters of a BES, tomato plant residues (TPRs), generated year-round as agricultural and cellulosic waste, were treated using three methanogenic reactors: a continuous stirred tank reactor (CSTR), a carbon fiber textile (CFT) reactor, and a bio-electrochemical reactor (BER) including CFT with electrochemical regulation (BER + CFT). CFT had positive effects on methane fermentation and methanogen abundance. Read More

    Understanding azo dye anaerobic bio-decolorization with artificial redox mediator supplement: Considering the methane production.
    Bioresour Technol 2017 Oct 19;249:799-808. Epub 2017 Oct 19.
    College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China.
    Artificial redox mediators (ARM) have been proven to accelerate the azo dye anaerobic bio-reduction (ADAB) but the mechanisms involved are still unclear. Previous studies do seldom focus on the production of methane during the ADAB, particularly if supplemented with ARM. Our studies revealed that the supplement of ARM could significantly accelerate the decolorization rate, recover the inhibited methanogenesis and decrease extracellular polymeric substance secretion in an ADAB system. Read More

    Differential responses of the green microalga Chlorella zofingiensis to the starvation of various nutrients for oil and astaxanthin production.
    Bioresour Technol 2017 Oct 27;249:791-798. Epub 2017 Oct 27.
    Institute for Food and Bioresource Engineering, College of Engineering, Peking University, Beijing 100871, China; BIC-ESAT, College of Engineering, Peking University, Beijing 100871, China. Electronic address:
    Chlorella zofingiensis has been proposed as a potential producer of lipids and the high-value carotenoid astaxanthin. In this study, the responses of photoautotrophic C. zofingiensis with respect to growth, lipid profiles and astaxanthin accumulation were investigated upon the starvation of N (NS), P (PS) and S (SS). Read More

    Alkaline solubilization of excess mixed sludge and the recovery of released phosphorus as magnesium ammonium phosphate.
    Bioresour Technol 2017 Oct 26;249:783-790. Epub 2017 Oct 26.
    Shenzhen Academy of Environmental Sciences, Shenzhen 518001, China.
    The alkaline solubilization of excess mixed sludge was investigated and subsequently the released phosphorus was recovered as magnesium ammonium phosphate (MAP). Considerable and rapid release of glycogen and protein was encountered after alkaline addition into the sludge. Only 45. Read More

    Cell immobilization on 3D-printed matrices: A model study on propionic acid fermentation.
    Bioresour Technol 2017 Nov 2;249:777-782. Epub 2017 Nov 2.
    Biotechnology, Department of Chemistry, Center for Chemistry & Chemical Engineering, Lund University, Box 124, SE-221 00 Lund, Sweden. Electronic address:
    This study uses three-dimensional (3D) printing technology as a tool for designing carriers for immobilization of microbial cells for bioprocesses. Production of propionic acid from glucose by immobilized Propionibacterium sp. cells was studied as a model system. Read More

    Understanding regulation in substrate dependent modulation of growth and production of alcohols in Clostridium sporogenes NCIM 2918 through metabolic network reconstruction and flux balance analysis.
    Bioresour Technol 2017 Nov 1;249:767-776. Epub 2017 Nov 1.
    Department of Biosciences & Bioengineering, Indian Institute of Technology, Guwahati, Assam 781039, India; DBT-PAN IIT Centre for Bioenergy, Indian Institute of Technology, Guwahati, Assam 781039, India. Electronic address:
    Flux Balance Analysis was performed for Clostridium sporogenes NCIM 2918 grown on sole glucose and glycerol or glucose-glycerol combinations at varied concentrations. During acidogenesis, glucose and glucose-glycerol combinations favored improved growth and butyric acid production. Glycerol fermentation was however marked by reduced growth and predominant ethanol synthesis. Read More

    Insight into the effect of organic and inorganic draw solutes on the flux stability and sludge characteristics in the osmotic membrane bioreactor.
    Bioresour Technol 2017 Oct 19;249:758-766. Epub 2017 Oct 19.
    Department of Engineering Science, The University of Oxford, Parks Road, Oxford OX1 3PJ, UK.
    In this study, chloride based (CaCl2 and MgCl2) and acetate based (NaOAc and MgOAc) salts in comparison with NaCl were investigated as draw solutions (DS) to evaluate their viability in the osmotic membrane bioreactor (OMBR). Membrane distillation was coupled with an OMBR setup to develop a hybrid OMBR-MD system, for the production of clean water and DS recovery. Results demonstrate that organic DS were able to mitigate the salinity buildup in the bioreactor as compared to inorganic salts. Read More

    Pretreatment of food waste for methane and hydrogen recovery: A review.
    Bioresour Technol 2017 Sep 20. Epub 2017 Sep 20.
    LBE, INRA, Univ Montpellier, Narbonne, France.
    Food waste (FW) management by biological process is more attractive and eco-friendly approach than thermo-chemical conversion or landfilling. However, FW composition and physico-chemical and biological characteristics affect the overall biological process in terms of product yield and degradation rate. To overcome this major bottle-neck, the pretreatment of FW is proposed. Read More

    Development and operation of innovative scum to biodiesel pilot-system for the treatment of floatable wastewater scum.
    Bioresour Technol 2017 Nov 1. Epub 2017 Nov 1.
    Department of Bioproducts and Biosystems Engineering, and Center for Biorefining, University of Minnesota, 1390 Eckles Avenue, St. Paul, MN 55108, USA. Electronic address:
    A novel process was developed for the biorefining of floatable wastewater scum and other waste oils from water treatment facilities into biodiesel and other value-added bio-products. To test the scalability and commercial potential of the technology, a 7000 l/year pilot-scale system was designed and built. Scum from a wastewater treatment facility, located in St. Read More

    The uptake of anaerobic digestion for the organic fraction of municipal solid waste - Push versus pull factors.
    Bioresour Technol 2017 Oct 26. Epub 2017 Oct 26.
    Centre for Solid Waste Bioprocessing, Schools of Civil and Chemical Engineering, The University of Queensland, Brisbane 4072, Australia. Electronic address:
    There are thousands of anaerobic digestion facilities worldwide applied to agricultural waste, energy crops and industrial food processing wastes. Yet, centralised anaerobic digestion for the organic fraction of Municipal Solid Waste (OFMSW) is almost exclusively applied in Europe and California where diversion of organics from landfill is enforced by legislation. Even in the EU however, only 5% of OFMSW is currently digested, with most organic waste incinerated. Read More

    Removal of chromophore in enzymatic hydrolysis by acid precipitation to improve the quality of xylo-oligosaccharides from corn stalk.
    Bioresour Technol 2017 Aug 16;249:751-757. Epub 2017 Aug 16.
    State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China. Electronic address:
    As the most representative functional sugar, the application areas and market demands of xylo-oligosaccharides (XOS) have been expanding year by year. Owing to the complex structure of corn stalk (CS), XOS obtained from CS are accompanied by problems such as low purity and high color value, which degrade the product. To improve the quality of XOS from CS, the enzymatic hydrolysis was precipitated by acid; then, the ethanol elution concentration was systematically investigated after optimizing the adsorption conditions. Read More

    Rapid nitrification process upgrade coupled with succession of the microbial community in a full-scale municipal wastewater treatment plant (WWTP).
    Bioresour Technol 2017 Oct 19. Epub 2017 Oct 19.
    Department of Environmental Engineering, School of Resource and Civil Engineering, Northeastern University, Shenyang 110819, China.
    Bioaugmentation was used to upgrade the nitrification process in a full-scale municipal WWTP with an A(2)/O system. A mixture of nitrifying bacteria was inoculated into the bioreactor for a final concentration of 1% (v/v). The upgrade process took 25 days, and the NH4(+)-N removals reached 94. Read More

    Changes in carbon footprint when integrating production of filamentous fungi in 1st generation ethanol plants.
    Bioresour Technol 2017 Oct 31. Epub 2017 Oct 31.
    Swedish Centre for Resource Recovery, University of Borås, 501 90 Borås, Sweden.
    Integrating the cultivation of edible filamentous fungi in the thin stillage from ethanol production is presently being considered. This integration can increase the ethanol yield while simultaneously producing a new value-added protein-rich biomass that can be used for animal feed. This study uses life cycle assessment to determine the change in greenhouse gas (GHG) emissions when integrating the cultivation of filamentous fungi in ethanol production. Read More

    Effects of potassium salts loading on calcium oxide on the hydrogen production from pyrolysis-gasification of biomass.
    Bioresour Technol 2017 Oct 24;249:744-750. Epub 2017 Oct 24.
    State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
    The effects of potassium (K) salts loading on CaO on the H2 production from pyrolysis-gasification of wheat straw were investigated. The loading of 0.25 wt% KCl could significantly enhance the CO2 absorption capability of CaO. Read More

    Treatment of different parts of corn stover for high yield and lower polydispersity lignin extraction with high-boiling alkaline solvent.
    Bioresour Technol 2017 Oct 16;249:737-743. Epub 2017 Oct 16.
    School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma'anshan, Anhui 243032, China; Biochemical Engineering Research Center, Anhui University of Technology, Ma'anshan, Anhui 243032, China. Electronic address:
    The influence of different parts of corn stover on lignin extraction was investigated. Five kinds of lignin were isolated by the high boiling point solvent extraction from the whole corn stover and four different parts including leaf, husk, bark and pith. The optimal condition was obtained: 6. Read More

    Evaluating the effects of activated carbon on methane generation and the fate of antibiotic resistant genes and class I integrons during anaerobic digestion of solid organic wastes.
    Bioresour Technol 2017 Oct 30;249:729-736. Epub 2017 Oct 30.
    NUS Environmental Research Institute, National University of Singapore, 5A Engineering Drive 1, T-Lab Building, Singapore 117411, Singapore; Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore 117576, Singapore. Electronic address:
    The effects of activated carbon (AC) on methane production and the fate of antibiotic resistance genes (ARGs) were evaluated through comparing the anaerobic digestion performance and transformation of ARGs among anaerobic mono-digestion of food waste, co-digestion of food waste and chicken manure, and co-digestion of food waste and waste activated sludge. Results showed that adding AC in anaerobic digesters improved methane yield by at least double through the enrichment of bacteria and archaea. Conventional digestion process showed ability in removing certain types of ARGs, such as tetA, tetX, sul1, sul2, cmlA, floR, and intl1. Read More

    Identification of d-carbamoylase for biocatalytic cascade synthesis of d-tryptophan featuring high enantioselectivity.
    Bioresour Technol 2017 Sep 27;249:720-728. Epub 2017 Sep 27.
    The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, Jiangsu, China. Electronic address:
    In this study, an enantioselective d-carbamoylase (AcHyuC) was identified from Arthrobacter crystallopoietes with optimum pH of 8.5, much more compatible with hydantoinase process than other reported d-N-carbamoylases. AcHyuC has a substrate preference for aromatic carbamoyl-compounds. Read More

    The kinetics of the polyacrylic superabsorbent polymers swelling in microalgae suspension to concentrate cells density.
    Bioresour Technol 2017 Oct 19;249:713-719. Epub 2017 Oct 19.
    Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing 400044, China; Institute of Engineering Thermophysics, Chongqing University, Chongqing 400044, China.
    Different from current harvesting methods, the aim of this study was to concentrate microalgae by removing the medium with polyacrylic superabsorbent polymers (PSAPs). This method can concentrate freshwater microalgae Chlorella sp. at a relatively high biomass concentration of 90. Read More

    Exploring magnetic and imprinted cross-linked enzyme aggregates of rhamnopyranosidase in microbioreactors.
    Bioresour Technol 2017 Oct 21;249:704-712. Epub 2017 Oct 21.
    Faculdade Farmácia, Universidade Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal; Research Institute for Medicines (iMed.ULisboa), Faculdade Farmácia, Universidadede Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal. Electronic address:
    The goal of this work was the development of magnetic cross link enzyme aggregates (mCLEAs) of rhamnopyranosidase (Rhmnase), prepared by chemical cross-linking with functionalized magnetite nanoparticles for glycompounds biosynthesis in microbioreactors (specially design 24-well microplate and mini-packed bed). Rhamnopyranosidase (EC number 3.2. Read More

    Comparison of thermophilic bacteria and alkyl polyglucose pretreatment on two-stage anaerobic digestion with waste sludge: Biogas production potential and substrate metabolism process.
    Bioresour Technol 2017 Oct 20;249:694-703. Epub 2017 Oct 20.
    College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China.
    To gain a better understanding of the influence on two-stage anaerobic digestion of waste sludge with thermophilic bacteria (TB) and alkyl polyglucose (APG) pretreatment, changing of soluble chemical oxygen demand (SCOD), carbohydrate and protein in extracellular polymeric substances (EPS) and dissolved organic matters (DOM) were analyzed. The excitation-emission matrix (EEM) with fluorescence regional integration (FRI) was also used to investigate compositional and structural characteristics of DOM. The highest hydrogen and methane yield of TB pretreated sludge was 12. Read More

    Microbial community structures and functions of wastewater treatment systems in plateau and cold regions.
    Bioresour Technol 2017 Oct 19;249:684-693. Epub 2017 Oct 19.
    Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China; National Centre for International Research of Low-carbon and Green Buildings, Chongqing University, Chongqing 400045, China. Electronic address:
    Wastewater treatment plants (WWTPs) in plateau regions have unique microbial community structures. In this study, Illumina high-throughput sequencing technology was applied to investigate microbial communities of plateau WWTPs. The research showed that microbial diversities and richness were negatively associated with the altitude and positively to the water temperature to a certain extent. Read More

    Hydrolytic pre-treatment methods for enhanced biobutanol production from agro-industrial wastes.
    Bioresour Technol 2017 Oct 5;249:673-683. Epub 2017 Oct 5.
    Bioprocess Engineering and Biotechnology Department, Federal University of Paraná, Centro Politécnico, Usina Piloto B, CEP 81531-990 Curitiba, Paraná, Brazil.
    Brewery industry liquid waste (BLW), brewery spent grain (BSG), apple pomace solid wastes (APS), apple pomace ultrafiltration sludge (APUS) and starch industry wastewater (SIW) have been considered as substrates to produce biobutanol. Efficiency of hydrolysis techniques tested to produce fermentable sugars depended on nature of agro-industrial wastes and process conditions. Acid-catalysed hydrolysis of BLW and BSG gave a total reducing sugar yield of 0. Read More

    Roles of magnetite and granular activated carbon in improvement of anaerobic sludge digestion.
    Bioresour Technol 2017 Oct 20;249:666-672. Epub 2017 Oct 20.
    Key Laboratory of Industrial Ecology and Environmental Engineering (Dalian University of Technology), Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
    Granular activated carbon (GAC) or magnetite could promote methane production from organic wastes, but their roles in enhancing anaerobic sludge digestion have not been clarified. GAC, magnetite and their combination were complemented into sludge digesters, respectively. Experimental results showed that average methane production increased by 7. Read More

    Hydrogen and carbon dioxide mixed culture fermentation in a hollow-fiber membrane biofilm reactor at 25 °C.
    Bioresour Technol 2017 Oct 21;249:659-665. Epub 2017 Oct 21.
    CAS Key Laboratory for Urban Pollutant Conversion, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China. Electronic address:
    There have been no reports of H2 and CO2 mixed-culture fermentation (MCF) at 25 °C in a hollow-fiber membrane biofilm reactor (HfMBR). In this study, H2 and CO2 MCF were conducted in an HfMBR at 25 °C producing metabolites including acetate, ethanol, butyrate, and caproate. Compared to pure culture fermentation (i. Read More

    Effects of different light source and media on growth and production of phycobiliprotein from freshwater cyanobacteria.
    Bioresour Technol 2017 Oct 14;249:652-658. Epub 2017 Oct 14.
    East Coast of Environmental Research Institute, Gong Badak Campus, Sultan Zainal Abidin University, 21300 Kuala Terengganu, Terengganu, Malaysia.
    The aim of this study was to determine the effect of different light sources and media (wastewater and BBM) on the growth of Pseudanabaena mucicola and its phycobiliprotein production. Results showed that P. mucicola grown in white light using wastewater as medium attributed higher biomass (0. Read More

    Enhancement of microbial nitrogen removal pathway by vegetation in Integrated Vertical-Flow Constructed Wetlands (IVCWs) for treating reclaimed water.
    Bioresour Technol 2017 Oct 20;249:644-651. Epub 2017 Oct 20.
    State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China.
    Constructed wetland is an efficient way to lower N load from wastewater treatment plants. Here, the nitrogen removal rate and nitrogen balance, as well as the microbial community structure in IVCWs planted with different vegetation for treating reclaimed water were investigated. The results showed that IVCWs planted with vegetation generally achieved a higher TN removal rate than unplanted treatment, especially for Canna indica L. Read More

    Fate of antibiotic resistance genes and metal resistance genes during thermophilic aerobic digestion of sewage sludge.
    Bioresour Technol 2017 Oct 20;249:635-643. Epub 2017 Oct 20.
    School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology, Buk-gu, Gwangju 500-712, Republic of Korea. Electronic address:
    This study examines the fate of twenty-three representative antibiotic resistance genes (ARGs) encoding tetracyclines, sulfonamides, quinolones, β-lactam antibiotics, macrolides, florfenicol and multidrug resistance during thermophilic aerobic digestion (TAD) of sewage sludge. The bacterial community, class 1 integrons (intI1) and four metal resistance genes (MRGs) were also quantified to determine the key drivers of changes in ARGs during TAD. At the end of digestion, significant decreases in the quantities of ARGs, MRGs and intI1 as well as 16S rRNA genes were observed. Read More

    A life cycle assessment of options for producing synthetic fuel via pyrolysis.
    Bioresour Technol 2017 Oct 20;249:626-634. Epub 2017 Oct 20.
    Coventry University, Faculty of Engineering, Environment and Computing, Coventry CV1 2JH, UK. Electronic address:
    The aim of this study was to investigate the sustainability of producing synthetic fuels from biomass using thermochemical processing and different upgrading pathways. Life cycle assessment (LCA) models consisting of biomass collection, transportation, pre-treatment, pyrolysis and upgrading stages were developed. To reveal the environmental impacts associated with greater post-processing to achieve higher quality fuels, six different bio-oil upgrading scenarios were analysed and included esterification, ketonisation, hydrotreating and hydrocracking. Read More

    Bioaugmentation with Clostridium thermocellum to enhance the anaerobic biodegradation of lignocellulosic agricultural residues.
    Bioresour Technol 2017 Oct 13;249:620-625. Epub 2017 Oct 13.
    Institute of Environmental Sciences, Boğaziçi University, Bebek, 34342 Istanbul, Turkey.
    This study aimed to improve biomethane production from lignocellulosic biomass by assessing the impact of bioaugmentation with Clostridium thermocellum on the performance of anaerobic digesters at different inoculation ratios. The outputs of the digestion experiments revealed that bioaugmentation strategies with C. thermocellum increased the methane yield up to 39%. Read More

    Green and sustainable succinic acid production from crude glycerol by engineered Yarrowia lipolytica via agricultural residue based in situ fibrous bed bioreactor.
    Bioresour Technol 2017 Oct 12;249:612-619. Epub 2017 Oct 12.
    School of Energy and Environment, City University of Hong Kong, Hong Kong. Electronic address:
    In situ fibrous bed bioreactor (isFBB) for efficient succinic acid (SA) production by Yarrowia lipolytica was firstly developed in our former study. In this study, agricultural residues including wheat straw, corn stalk and sugarcane bagasse were investigated for the improvement of isFBB, and sugarcane bagasse was demonstrated to be the best immobilization material. With crude glycerol as the sole carbon source, optimization for isFBB batch fermentation was carried out. Read More

    Effects of temperature shock on N2O emissions from denitrifying activated sludge and associated active bacteria.
    Bioresour Technol 2017 Oct 20;249:605-611. Epub 2017 Oct 20.
    CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China. Electronic address:
    To investigate the effects of temperature shock on N2O emissions, four treatments with rapidly changing incubation temperature from the control (20 °C) to 4, 12, 25, or 34 °C were conducted. Results showed that higher N2O emissions (0.023-0. Read More

    Rheological properties of microalgae slurry for application in hydrothermal pretreatment systems.
    Bioresour Technol 2017 Oct 14;249:599-604. Epub 2017 Oct 14.
    Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing 400044, China; Institute of Engineering Thermophysics, Chongqing University, Chongqing 400044, China.
    Herein, the rheological properties of microalgae slurries (Chlorella pyrenoidosa) under different mass fractions and temperatures (293-373 K) were reported, which can significantly affect the energy requirement of hydrothermal pretreatment process and hence the performance of fermentation processes. The experiment results showed that the microalgae slurry had a shear-thinning phenomenon, suggesting that microalgae slurry is a non-Newtonian fluid. For the first time, the phenomenon of variable flow behavior index under varying shear rates was discovered. Read More

    Effect of an enzymatic treatment with cellulase and mannanase on the structural properties of Nannochloropsis microalgae.
    Bioresour Technol 2017 Oct 18;249:592-598. Epub 2017 Oct 18.
    DICMA - Department of Chemical Engineering Materials and Environment, Sapienza University, Via Eudossiana 18, 00184 Rome, Italy. Electronic address:
    The effects of an enzymatic treatment with cellulase and mannanase on the properties of marine microalgae Nannochloropsis sp. were investigated. The combined use of these enzymes synergistically promoted the recovery of lipids from the microalgae, increasing the extraction yield from 40. Read More

    Pilot scale flat panel photobioreactor system for mass production of Ulva lactuca (Chlorophyta).
    Bioresour Technol 2017 Oct 16;249:582-591. Epub 2017 Oct 16.
    DBT-ICT-Centre for Energy Biosciences, Institute of Chemical Technology, Matunga, Mumbai 400019, India; Department of Chemical Engineering, Institute of Chemical Technology, Matunga, Mumbai 400019, India.
    Conventional open-sea cultivation constrained by environmental factors is singly incompetent to sustain the rising seaweed demand. This necessitates a complementary strategy to reinforce the existing cultivation system and expand the global seaweed industry. Present study proposes cultivation of Ulva lactuca in temperature controlled flat panel photobioreactors under natural illumination. Read More

    The effects of temperature and color value on hydrochars' properties in hydrothermal carbonization.
    Bioresour Technol 2017 Oct 16;249:574-581. Epub 2017 Oct 16.
    Institute of Biological and Environmental Engineering, Hunan Academy of Forestry, Changsha 410004, PR China.
    In order to investigate the influence of hydrothermal carbonization (HTC) on the properties of the hydrochars, sawdust with a particle size below 0.45mm was treated in an autoclave at 200-260°C. The physical and chemical characteristics of products were studied, including proximate analysis, elemental composition, fiber content, surface area, bulk density, energy yield, color value, combustion activities and pyrolysis kinetics, etc. Read More

    Activated microporous-mesoporous carbon derived from chestnut shell as a sustainable anode material for high performance microbial fuel cells.
    Bioresour Technol 2017 Oct 16;249:567-573. Epub 2017 Oct 16.
    School of Environmental Science and Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, PR China. Electronic address:
    Microbial fuel cells (MFCs) are promising biotechnologies tool to harvest electricity by decomposing organic matter in waste water, and the anode material is a critical factor in determining the performance of MFCs. In this study, chestnut shell is proposed as a novel anode material with mesoporous and microporous structure prepared via a simple carbonization procedure followed by an activation process. The chemical activation process successfully modified the macroporous structure, created more mesoporous and microporous structure and decreased the O-content and pyridinic/pyrrolic N groups on the biomass anode, which were beneficial for improving charge transfer efficiency between the anode surface and microbial biofilm. Read More

    Kinetic analysis of pyrolysis and combustion of the olive tree pruning by chemical fractionation.
    Bioresour Technol 2017 Oct 14;249:557-566. Epub 2017 Oct 14.
    Department of Chemical Engineering, Avenida Fuentenueva s/n., University of Granada, 18071 Granada, Spain. Electronic address:
    This paper presents a kinetic analysis of thermal decomposition of olive tree pruning from its basic compounds in pyrolysis and combustion reactions. Experiments were performed by TGA under inert and oxidant conditions and results indicated that the decomposition of the olive tree pruning was related to the material composition. Pseudo-mechanistic models were proposed estimating the yield of pyrolysis on its basic compounds (hemicelluloses, cellulose and lignin). Read More

    Effects of salinity on the denitrification efficiency and community structure of a combined partial nitritation- anaerobic ammonium oxidation process.
    Bioresour Technol 2017 Oct 10;249:550-556. Epub 2017 Oct 10.
    School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China.
    The effects of salinity changes on nitrogen transformation efficiency and recoverability were studied by using a partial nitration (PN)- anaerobic ammonium oxidation (Anammox) integrated reactor. The changes of microbial community structure and population abundance during the increase and decrease of salinity were also analyzed by 16S rRNA gene high-throughput sequencing. The results showed that when the salinity was increased to 1. Read More

    Characterization of microbial community succession during vermicomposting of medicinal herbal residues.
    Bioresour Technol 2017 Oct 7;249:542-549. Epub 2017 Oct 7.
    College of Biological and Agricultural Engineering, Jilin University, Changchun 130022, China.
    Large amounts of medicinal herbal residues (MHR) are produced in the world annually due to the increasing demand for herbal products. In this study, vermicomposting was used to stabilize MHR. Four inoculating density of earthworms was studied, specifically, 0 (W1), 60 (W2), 120 (W3) and 180 (W4) earthworms per kilogram of substrate. Read More

    Camellia oleifera shell as an alternative feedstock for furfural production using a high surface acidity solid acid catalyst.
    Bioresour Technol 2017 Oct 18;249:536-541. Epub 2017 Oct 18.
    College of Environmental and Municipal Engineering, Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Key Laboratory of Environmental Engineering, Shaanxi Province, Xi'an University of Architecture and Technology, Xi'an 710055, PR China.
    This paper focuses on the high-value transformation of camellia oleifera shell, which is an agricultural waste enriched in hemicellulose. An efficient catalytic route employing sulfonated swelling mesoporous polydivinylbenzene (PDVB-SO3H) as catalyst in monophasic or biphasic solvents was developed for the conversion of raw camellia oleifera shell into furfural. The reaction parameters were evaluated and optimized for improving the furfural yield. Read More

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