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    Upgrading agricultural wastes using three different carbonization methods: Thermal, hydrothermal and vapothermal.
    Bioresour Technol 2018 Jun 15;265:365-371. Epub 2018 Jun 15.
    School of Mechanical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia. Electronic address:
    In this study, three different methods for high quality solid fuel production were tested and compared experimentally. Oil palm empty fruit bunches, mesocarp fibers, palm kernel shells and rubber seeds shells were treated using thermal (TC), hydrothermal (HTC) and vapothermal (VTC) carbonization. All thermochemical methods were accomplished by using a custom made batch-type reactor. Read More

    Highly efficient of nitrogen removal from mature landfill leachate using a combined DN-PN-Anammox process with a dual recycling system.
    Bioresour Technol 2018 Jun 9;265:357-364. Epub 2018 Jun 9.
    School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China; National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Suzhou 215009, China.
    An efficient and stable combined denitrification-partial nitrification-Anammox process with a dual recycling system was used to remove nitrogen from mature landfill leachate. After 155 d of operation, the NO as the PN-Anammox byproduct was almost treated with biodegradable organic carbon in raw wastewater in a pre-denitrification reactor by external recycling system. When raw landfill leachate with NH-N concentration of 1900 mg/L was treated, an integrated reactor with airlift recycling was combined with the PN and Anammox reactions to efficiently remove NH from the inflow. Read More

    Engaging multiple weighting approaches and Conjoint Analysis to extend results acceptance of life cycle assessment in biological wastewater treatment technologies.
    Bioresour Technol 2018 Jun 14;265:349-356. Epub 2018 Jun 14.
    State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China. Electronic address:
    Environmental impacts of biological wastewater treatment technologies (BWTTs) can be evaluated by life cycle assessment (LCA). However, very few efforts have been made to expand the ranges of results acceptance and promote stakeholders to participate in the results analysis. To facilitate the evaluation reaching more wide and deep understanding, this study proposed to employ multiple weighting methods and the Conjoint Analysis. Read More

    A novel ternary combination of deep eutectic solvent-alcohol (DES-OL) system for synergistic and efficient delignification of biomass.
    Bioresour Technol 2018 Jun 12. Epub 2018 Jun 12.
    Bioprocess Group, Hindustan Petroleum Green R & D Center, KIADB Industrial Area, Devanagonthi, Bengaluru 560067, India. Electronic address:
    A novel ternary system consisting of deep eutectic solvent-alcohol (DES-OL) mixture was developed for the effective delignification of lignocellulosic biomass. Optimization studies included selecting suitable co-solvent (among n-BuOH, n-PrOH & EtOAc) for treating biomass (rice husk, rice straw and wheat straw), altering the DES-to-alcohol ratio (2:1, 1:1 and 1:2) as well as the reaction temperature (50, 80 and 120 °C). The highest delignification (∼50%) was observed using n-butanol assisted DES (ChCl: OA) at a ratio of 2:1, with high solid loading of 15% (w/v) at 120 °C (∼1. Read More

    Simultaneous autotrophic removal of sulphate and nitrate at different voltages in a bioelectrochemical reactor (BER): Evaluation of degradation efficiency and characterization of microbial communities.
    Bioresour Technol 2018 Jun 15;265:340-348. Epub 2018 Jun 15.
    School of Environment and Energy, South China University of Technology, Higher Education Mega Center, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou 510006, PR China.
    The autotrophic removal of sulphate and nitrate in bioelectrochemical reactors was investigated at different external voltages (0.2, 0.4, 0. Read More

    Integration of facile deep eutectic solvents pretreatment for enhanced enzymatic hydrolysis and lignin valorization from industrial xylose residue.
    Bioresour Technol 2018 Jun 12;265:334-339. Epub 2018 Jun 12.
    Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China; Shandong Key Laboratory of Paper Science & Technology, Qilu University of Technology, Jinan 250353, China. Electronic address:
    In this study, a novel biomass pretreatment process using three kinds of deep eutectic solvents (DESs) was developed to improve saccharification efficiency and lignin valorization. The major components of xylose residue including cellulose and lignin fractions were released, recovered and utilized. Pretreatment with betaine/lactic acid system at 120 °C for 2 h was found to be the optimal conditions with prominently increased enzymatic digestibility (from 55. Read More

    Identification of the enzymes responsible for 3-hydroxypropionic acid formation and their use in improving 3-hydroxypropionic acid production in Gluconobacter oxydans DSM 2003.
    Bioresour Technol 2018 Jun 2;265:328-333. Epub 2018 Jun 2.
    State Key Laboratory of Bioreactor Engineering, New World Institute of Biotechnology, East China University of Science and Technology, Shanghai 200237, People's Republic of China. Electronic address:
    Gluconobacter oxydans can be efficiently used to produce 3-hydroxypropionic acid (3-HP) from 1,3-propanediol (1,3-PDO). However, the enzymes involved remain unclear. In this study, transcription analysis of two mutants of strain DSM 2003, obtained by UV-mutagenesis, revealed that membrane-bound alcohol dehydrogenase (mADH) and membrane-bound aldehyde dehydrogenase (mALDH) might be the main enzymes involved. Read More

    Bio-oil production from hydrothermal liquefaction of Pteris vittata L.: Effects of operating temperatures and energy recovery.
    Bioresour Technol 2018 Jun 14;265:320-327. Epub 2018 Jun 14.
    Institute of Energy and Environmental Engineering, Ningbo Institute of Technology, Zhejiang University, Ningbo 315000, China; Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China. Electronic address:
    Hyper-accumulator biomass, Pteris vittata L., was hydrothermally converted into bio-oils via hydrothermal liquefaction (HTL) in sub-supercritical water. The distributions and characterizations of various products as well as energy recovery under different temperatures (250-390 °C) were investigated. Read More

    Deciphering the factors influencing the discrepant fate of antibiotic resistance genes in sludge and water phases during municipal wastewater treatment.
    Bioresour Technol 2018 Jun 9;265:310-319. Epub 2018 Jun 9.
    State Key Joint Laboratory of Environmental Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Department of Water Pollution Control Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address:
    The discrepant fate of antibiotic resistance genes (ARGs) in sludge and water phases was investigated in a municipal wastewater treatment plant, and a lab-scale AO-MBR was operated to provide background value of ARGs. The influencing factors of ARGs including microbial community, co-selection from heavy metals, biomass and horizontal gene transfer were concerned. Results showed that iAO (inversed AO) showed better ARGs reduction, and longer SRT (sludge retention time) increased ARGs relative abundance while reduced the gene copies of ARGs in the effluent, but significantly increased the ARGs in sludge phase. Read More

    Abundant and rare microbial sub-communities in anammox granules present contrasting assemblage patterns and metabolic functions in response to inorganic carbon stresses.
    Bioresour Technol 2018 Jun 9;265:299-309. Epub 2018 Jun 9.
    State Key Laboratory of Crop Stress Biology in Arid Areas, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi 712100, China. Electronic address:
    Nitrogen-transforming microorganisms play pivotal roles for the microbial nitrogen-cycling network in the anammox granular system. However, little is known about the effects of inorganic carbon (IC) stresses on the assemblage patterns and functional profiles of abundant and rare taxa. Herein, the community assemblage and functional traits of abundant and rare sub-communities were investigated. Read More

    Effect of stirring on growth and cellulolytic enzymes production by Trichoderma harzianum in a novel bench-scale solid-state fermentation bioreactor.
    Bioresour Technol 2018 Jun 14;265:291-298. Epub 2018 Jun 14.
    Departamento de Biotecnología, Universidad Autónoma Metropolitana, Unidad Iztapalapa, CP 09340, Iztapalapa, México, D.F., Mexico. Electronic address:
    A novel bench-scale stirred bioreactor for solid-state fermentation was used to determine the effect of the stirring rate on growth and enzymes production by Trichoderma harzianum PBLA. Lab-scale static tubular bioreactors were first used to assess the effect of bioreactor diameter on heat accumulation, growth, and production of cellulases and xylanases. The increased diameters (1. Read More

    An overview of microbial biogas enrichment.
    Bioresour Technol 2018 Jun 14. Epub 2018 Jun 14.
    Biological and Chemical Engineering, Aarhus University, Hangovej 2, DK-8200 Aarhus N, Denmark. Electronic address:
    Biogas upgrading technologies have received widespread attention recently and are researched extensively. Microbial biogas upgrading (biomethanation) relies on the microbial performance in enriched H and CO environments. In this review, recent developments and applications of CH enrichment in microbial methanation processes are systematically reviewed. Read More

    Microbial communities and natural fermentation of corn silages prepared with farm bunker-silo in Southwest China.
    Bioresour Technol 2018 Jun 8;265:282-290. Epub 2018 Jun 8.
    Animal Science and Technology College, Sichuan Agricultural University, Chengdu, China. Electronic address:
    This study analyzed the variation of microbial communities, their achieved fermentation quality, and the association between microbial diversity and environmental factors after ensiling of 96 samples prepared with bunker-silo in Southwest China. Most of natural corn silages achieved good fermentation, e.g. Read More

    Methanogenic community shifts during the transition from sewage mono-digestion to co-digestion of grass biomass.
    Bioresour Technol 2018 Jun 6;265:275-281. Epub 2018 Jun 6.
    Robert Boyle Institut e.V., Jena, Germany; Institute for Integrative Systems Biology (I2SysBio), Paterna, Valencia, Spain; Technische Universität Dresden, Chair of Waste Management, Pratzschwitzer Str. 15, Pirna, Germany. Electronic address:
    In this work, liquid and solid fractions of grass biomass were used as co-substrates for anaerobic co-digestion of sewage sludge. The input of grass biomass was increased gradually, and the underlying methanogenic microbiome was assessed by means of microscopy-based cell counting and full-length 16S rRNA gene high-throughput sequencing, proving for the first time the suitability of nanopore-based portable sequencers as a monitoring tool for anaerobic digestion systems. In both cases co-fermentation resulted in an increased number of bacteria and methanogenic archaea. Read More

    Comprehensive pulsed electric field (PEF) system analysis for microalgae processing.
    Bioresour Technol 2018 Jun 7;265:268-274. Epub 2018 Jun 7.
    ETH Zurich, Institute of Food Nutrition and Health, Laboratory of Sustainable Food Processing, Schmelzbergstrasse 9, Zurich 8092, Switzerland. Electronic address:
    Pulsed electric field (PEF) is an emerging nonthermal technique with promising applications in microalgae biorefinery concepts. In this work, the flow field in continuous PEF processing and its influencing factors were analyzed and energy input distributions in PEF treatment chambers were investigated. The results were obtained using an interdisciplinary approach that combined multiphysics simulations with ultrasonic Doppler velocity profiling (UVP) and rheological measurements of Arthrospira platensis suspensions as a case study for applications in the biobased industry. Read More

    Effect of hydraulic retention time on nitrogen removal and functional gene quantity/transcription in biochar packed reactors at 5 °C: A control-strategy study.
    Bioresour Technol 2018 Jun 6. Epub 2018 Jun 6.
    State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China. Electronic address:
    This study investigated the effect of hydraulic retention time (HRT = 8, 12, 16, and 24 h) on effluent dissolved organic nitrogen (DON), dissolved total nitrogen (DTN), and functional gene quantity/transcription in biochar packed reactors over a 125-day operation at 5 °C. The lowest effluent DON concentration (0.21 ± 0. Read More

    Long-term culture of the marine dinoflagellate microalga Amphidinium carterae in an indoor LED-lighted raceway photobioreactor: Production of carotenoids and fatty acids.
    Bioresour Technol 2018 Jun 1;265:257-267. Epub 2018 Jun 1.
    Chemical Engineering Area, University of Almería, 04120 Almería, Spain; Research Center in Agrifood Biotechnology (BITAL), University of Almería, 04120 Almería, Spain.
    The feasibility of the long-term (>170 days) culture of a dinoflagellate microalga in a raceway photobioreactor is demonstrated for the first time. Amphidinium carterae was chosen for this study as it is producer of interesting high-value compounds. Repeated semicontinuous culture provided to be a robust operational mode. Read More

    Effect of CaO addition on anaerobic digestion of waste activated sludge at different temperatures and the promotion of valuable carbon source production under ambient condition.
    Bioresour Technol 2018 Jun 6;265:247-256. Epub 2018 Jun 6.
    State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China. Electronic address:
    The effect of calcium peroxide (CaO) addition on anaerobic digestion (AD) of waste activated sludge (WAS) at different temperatures (20 °C, 35 °C, and 55 °C) were investigated. The results show that CaO addition had significant positive effect on short-chain fatty acids (SCFAs) production under ambient and mesophilic conditions. Polysaccharides and proteins embedded in extracellular polymeric substances (EPS) were effectively released from inner fraction to outer fraction, and non-biodegradable humic-like substances were decreased while easily biodegradable tryptophan-like proteins increased. Read More

    Pyrolysis of Musa balbisiana flower petal using thermogravimetric studies.
    Bioresour Technol 2018 May 11;265:236-246. Epub 2018 May 11.
    Department of Civil Engineering, National Institute of Technology, Tiruchirappalli, Tamil Nadu 620015, India.
    In the present study, thermogravimetric analysis of Musa balbisiana flower petal was carried out to study the degradation behaviour and the kinetics in the pyrolytic reaction. The pyrolysis was carried out in the temperature range of 35-900 °C at different heating rates of 5, 10 and 20 °C/min. The kinetics was investigated using different models like Kissinger-Akahira-Sunose (KAS), Flynn-Ozawa-Wall (FOW), Friedman and Broido's plot. Read More

    Characterisation of biochar from maize residues produced in a self-purging pyrolysis reactor.
    Bioresour Technol 2018 Jun 1;265:224-235. Epub 2018 Jun 1.
    University of Hohenheim, Institute of Agricultural Engineering, Tropics and Subtropics Group (440e), Stuttgart 70599, Germany.
    Response surface methodology was used to optimise pyrolysis conditions to produce biochar from maize residues (cobs, husks, leaves and stalks). The aim was to obtain biochar with good potential as an additive for composting. Mathematical models were developed to explain the experimental responses of volatile matter content (VM), ash content (AC), pH and electrical conductivity (EC) to the operating parameters such as temperature, heating rate and holding time. Read More

    Pretreatment of Leucaena leucocephala wood by acidified glycerol: optimization, severity index and correlation analysis.
    Bioresour Technol 2018 Jun 5;265:214-223. Epub 2018 Jun 5.
    School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110 067, India. Electronic address:
    In this study, Leucaena leucocephala wood was pretreated with aqueous glycerol having HSO as the catalyst. Response surface methodology (RSM) and artificial neural network (ANN) were used to optimize the process parameters, catalyst concentration (1-3%), duration (120-300 min) and temperature (100-150 °C). ANN gave more accurate predictions for total reducing sugar yield than RSM. Read More

    Effect of temperature on thermophilic composting of aquaculture sludge: NH recovery, nitrogen mass balance, and microbial community dynamics.
    Bioresour Technol 2018 Jun 1;265:207-213. Epub 2018 Jun 1.
    School of Environment and Society, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan.
    Development of thermophilic composting for maximizing NH gas recovery would enable the production of a nitrogen source which is free from pathogen/heavy metal, for the cultivation of high-value microalgae. The present study examined the effect of NH recovery, nitrogen mass balance, and microbial community dynamics on thermophilic composting of shrimp aquaculture sludge. The emission of NH gas at 60 and 70 °C was 14. Read More

    In situ biofilm removal from air cathodes in microbial fuel cells treating domestic wastewater.
    Bioresour Technol 2018 Jun 6;265:200-206. Epub 2018 Jun 6.
    Department of Civil and Environmental Engineering, The Pennsylvania State University, University Park, PA 16802, USA. Electronic address:
    One challenge in using microbial fuel cells (MFCs) for wastewater treatment is the reduction in performance over time due to cathode fouling. An in-situ technique was developed to clean air cathodes using magnets on either side of the electrode, with the air-side magnet moved to clean the water-side magnet by scraping off the biofilm. The power output of the magnet-cleaned cathodes after one month of operation was 132 ± 7 mW m, which was 42% higher than the controls with no magnet (93 ± 4 mW m) (no separator, NS), and 110% higher (116 ± 4 mW m) than controls with separators (Sp, 55 ± 7 mW m). Read More

    Integrated production of cellulosic bioethanol and succinic acid from rapeseed straw after dilute-acid pretreatment.
    Bioresour Technol 2018 May 29;265:191-199. Epub 2018 May 29.
    Department of Environmental Engineering, Technical University of Denmark, Building 113, DK-2800 Lyngby, Denmark. Electronic address:
    The aim of this study was to develop an integrated biofuel (cellulosic bioethanol) and biochemical (succinic acid) production process from rapeseed straw after dilute-acid pretreatment. Rapeseed straw pretreatment at 20% (w/v) solid loading and subsequent hydrolysis with Cellic® CTec2 resulted in high glucose yield (80%) and ethanol output (122-125 kg of EtOH/Mg of rapeseed straw). Supplementation the enzymatic process with 10% dosage of endoxylanases (Cellic® HTec2) reduced the hydrolysis time required to achieve the maximum glucan conversion by 44-46% and increased the xylose yield by 10% compared to the process with Cellic® CTec2. Read More

    Kinetics and thermodynamic analysis in one-pot pyrolysis of rice hull using renewable calcium oxide based catalysts.
    Bioresour Technol 2018 Jun 6;265:180-190. Epub 2018 Jun 6.
    College of Forest Products and Paper Science, University of the Philippines Los Baños, College, Laguna 4031, Philippines.
    Thermodynamic and kinetic parameters of catalytic pyrolysis of rice hull (RH) pyrolysis using two different types of renewable catalysts namely natural limestone (LS) and eggshells (ES) using thermogravimetric analysis (TG) approach at different heating rates of 10-100 K min in temperature range of 323-1173 K are investigated. Catalytic pyrolysis mechanism of both catalysts had shown significant effect on the degradation of RH. Model free kinetic of iso-conversional method (Flynn-Wall-Ozawa) and multi-step reaction model (Distributed Activation Energy Model) were employed into present study. Read More

    Nitric oxide removal from flue gas with ammonium using AnammoxDeNOx process and its application in municipal sewage treatment.
    Bioresour Technol 2018 Jun 4;265:170-179. Epub 2018 Jun 4.
    Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, China.
    A novel AnammoxDeNOx process was designed to simultaneously remove NOx in flue gas and ammonium wastewater, with the aim of exploring the possibility of using NO as a long-term and stable electron acceptor for anammox bacteria. The performance of the AnammoxDeNOx process indicated a NOx removal efficiency from simulated flue gas (including CO, SO, O and NO) of 87-96% using simulated ammonium wastewater. With municipal wastewater, the removal efficiencies for NOx were 70-90%, total nitrogen 40-70%, and COD 80-90% (NO concentration: 100-500 ppm). Read More

    Enhancement of Spirulina biomass production and cadmium biosorption using combined static magnetic field.
    Bioresour Technol 2018 Jun 6;265:163-169. Epub 2018 Jun 6.
    Faculty of Science, Tanta University, 31527 Tanta, Egypt; College of Life Science, Northwest A & F University, Yangling, Shaanxi 712100, China.
    The effect of static magnetic field (SMF) on Spirulina platensis growth and its influence on cadmium ions (Cd) removal efficiency were studied. Application of 6 h day SMF resulted in the highest significant biomass productivity of 0.198 g L day. Read More

    Effects of co-composting of lincomycin mycelia dregs with furfural slag on lincomycin degradation, maturity and microbial communities.
    Bioresour Technol 2018 May 26;265:155-162. Epub 2018 May 26.
    Henan Xinxiang Hua Xing Pharmaceutical Factory, Xinxiang 453731, Henan, PR China.
    This paper investigated the effect of co-composting of lincomycin mycelia dregs (LMDs) with furfural slag on the degradation of lincomycin, maturity and microbial communities. Results showed that after 66 days composting, the concentration of lincomycin was removed above 99%. The final pH, C/N and germination index (GI) all met the national standards in maturity. Read More

    The distinctive microbial community improves composting efficiency in a full-scale hyperthermophilic composting plant.
    Bioresour Technol 2018 Jun 7;265:146-154. Epub 2018 Jun 7.
    Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Guangdong Institute of Eco-environmental Science & Technology, Guangzhou 510650, China; Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China. Electronic address:
    The application of conventional thermophilic composting (TC) is limited by poor efficiency. Newly-developed hyperthermophilic composting (HTC) is expected to overcome this shortcoming. However, the characterization of microbial communities associated with HTC remains unclear. Read More

    Kinetic compensation effect in logistic distributed activation energy model for lignocellulosic biomass pyrolysis.
    Bioresour Technol 2018 Jun 4;265:139-145. Epub 2018 Jun 4.
    Biomass Energy Engineering Research Center, Key Laboratory of Urban Agriculture (South) Ministry of Agriculture, School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People's Republic of China; CAS Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, People's Republic of China. Electronic address: http://biofuels.sjtu.edu.cn.
    The kinetic compensation effect in the logistic distributed activation energy model (DAEM) for lignocellulosic biomass pyrolysis was investigated. The sum of square error (SSE) surface tool was used to analyze two theoretically simulated logistic DAEM processes for cellulose and xylan pyrolysis. The logistic DAEM coupled with the pattern search method for parameter estimation was used to analyze the experimental data of cellulose pyrolysis. Read More

    Cocoa residues as viable biomass for renewable energy production through anaerobic digestion.
    Bioresour Technol 2018 May 31. Epub 2018 May 31.
    Center for Microbial Ecology and Technology (CMET), Ghent University, Coupure Links 653, B-9000 Gent, Belgium. Electronic address: http://www.cmet.Ugent.be.
    The aim of this work was to evaluate the bioenergy potential of cocoa residue via anaerobic digestion. Batch and fed-batch lab-scale reactors were operated under low and high solids conditions. In the batch tests, 59 ± 4% of Chemical Oxygen Demand (COD) was recovered as methane. Read More

    Biochar enhanced ethanol and butanol production by Clostridium carboxidivorans from syngas.
    Bioresour Technol 2018 Jun 1;265:128-138. Epub 2018 Jun 1.
    Department of Microbiology and Plant Biology, University of Oklahoma, Norman, OK, USA.
    Biochar has functional groups, pH buffering capacity and cation exchange capacity (CEC) that can be beneficial in syngas fermentation. This study examined the properties of biochar made from switchgrass (SGBC), forage sorghum (FSBC), red cedar (RCBC) and poultry litter (PLBC), and their effects on ethanol and butanol production from syngas using Clostridium carboxidivorans. Experiments were performed in 250 mL bottle reactors with a 50 mL working volume at 37 °C fed syngas containing CO:H:CO (40:30:30 by volume). Read More

    Semi-hydrolysis with low enzyme loading leads to highly effective butanol fermentation.
    Bioresour Technol 2018 May 16;264:335-342. Epub 2018 May 16.
    Laboratory of Microbial Technology, Division of Systems Bioengineering, Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan. Electronic address:
    To improve butanol fermentation efficiencies, semi-hydrolysate with low enzyme loading using HSO pretreated rice straw was designed, which preferably produced cellobiose with xylose (instead of glucose). Fermentation of semi-hydrolysates avoided carbon catabolite repression (CCR) and produced higher butanol yield to enzyme loading (0.0290 g U), a newly proposed parameter, than the conventional glucose-oriented hydrolysate (0. Read More

    Bio-electrochemical system (BES) as an innovative approach for sustainable waste management in petroleum industry.
    Bioresour Technol 2018 Feb 15. Epub 2018 Feb 15.
    Industrial Biotechnology Department, Research and Development Center, Indian Oil Corporation Limited, Sector-13, Faridabad, Haryana 121007, India.
    Petroleum industry is one of the largest and fast growing industries due to the ever increasing global energy demands. Petroleum refinery produces huge quantities of wastes like oily sludge, wastewater, volatile organic compounds, waste catalyst, heavy metals, etc., because of its high capacity and continuous operation of many units. Read More

    Understanding the synergistic effect and the main factors influencing the enzymatic hydrolyzability of corn stover at low enzyme loading by hydrothermal and/or ultrafine grinding pretreatment.
    Bioresour Technol 2018 May 26;264:327-334. Epub 2018 May 26.
    College of Engineering, China Agricultural University (East Campus), 17 Qing-Hua-Dong-Lu, Hai-Dian District, Beijing 100083, PR China. Electronic address:
    A thorough assessment of the microstructural changes and synergistic effects of hydrothermal and/or ultrafine grinding pretreatment on the subsequent enzymatic hydrolysis of corn stover was performed in this study. The mechanism of pretreatment was elucidated by characterizing the particle size, specific surface area (SSA), pore volume (PV), average pore size, cellulose crystallinity (CrI) and surface morphology of the pretreated samples. In addition, the underlying relationships between the structural parameters and final glucose yields were elucidated, and the relative significance of the factors influencing enzymatic hydrolyzability were assessed by principal component analysis (PCA). Read More

    Effects of ferric chloride pretreatment and surfactants on the sugar production from sugarcane bagasse.
    Bioresour Technol 2018 Jun 1;265:93-101. Epub 2018 Jun 1.
    College of Forestry and Landscape Architecture, Key Laboratory of Energy Plants Resource and Utilization, Ministry of Agriculture, South China Agricultural University, Guangzhou 510642, PR China. Electronic address:
    An efficient pretreatment with various concentrations of FeCl (0.005-0.2 mol/L) was developed to extract hemicellulose in sugarcane bagasse and enhance the enzymatic hydrolysis of cellulose in pretreated solids. Read More

    Life-cycle assessment of tobacco stalk utilization.
    Bioresour Technol 2018 Jun 1;265:119-127. Epub 2018 Jun 1.
    State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China. Electronic address:
    The aim of this work was to investigate the environmental performance of different tobacco stalk methods using Life Cycle Assessment (LCA). Three scenarios were established: biodegradable plant nursery tray (PNT) making, open burning, and indoor incineration. The results showed that 3380, 1590, 1320 kg CO-eq, 25. Read More

    Oil accumulation and in situ trans/esterification by lipolytic fungal biomass.
    Bioresour Technol 2018 May 29;265:110-118. Epub 2018 May 29.
    Institute of Technical Biochemistry, Lodz University of Technology, 90-924 Lodz, Stefanowskiego 4/10, Poland.
    The goal of this study was to increase the cost-effectiveness of oil production by an oleaginous and lipolytic strain M. circinelloides IBT-83, by optimizing both lipids accumulation in the mycelium containing intracellular lipases, and a one-step process coupling lipids extraction and enzymatic trans/esterification. In optimal conditions (culture medium composed of corn steep solids, plant oil, glucose and NO) over 50g/dm of biomass containing over 60% of lipids was produced. Read More

    Strategies and relative mechanisms to attenuate the bioaccumulation and biotoxicity of ceria nanoparticles in wastewater biofilms.
    Bioresour Technol 2018 Jun 1;265:102-109. Epub 2018 Jun 1.
    Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, People's Republic of China.
    Inhibitory effects of ceria nanoparticles (CeO NPs) on biofilm were investigated individually and in combination with phosphate (P), ethylene diamine tetraacetic acid (EDTA), humic acid (HA) and citrate (CA) to further explore the toxicity alleviating solutions. Exposure to 20 mg/L CeO NPs significantly decreased the performance of biofilm in nutrients removal. Distribution experiments suggested >98% of the CeO NPs retained in microbial aggregates, leading to 51. Read More

    Proteomic researches for lignocellulose-degrading enzymes: A mini-review.
    Bioresour Technol 2018 May 31. Epub 2018 May 31.
    Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan; Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan. Electronic address:
    Protective action of lignin/hemicellulose networks and crystalline structures of embedded cellulose render lignocellulose material resistant to external enzymatic attack. To eliminate this bottleneck, research has been conducted in which advanced proteomic techniques are applied to identify effective commercial hydrolytic enzymes. This mini-review summarizes researches on lignocellulose-degrading enzymes, the mechanisms of the responses of various lignocellulose-degrading strains and microbial communities to various carbon sources and various biomass substrates, post-translational modifications of lignocellulose-degrading enzymes, new lignocellulose-degrading strains, new lignocellulose-degrading enzymes and a new method of secretome analysis. Read More

    Real-time recovery strategies for volatile fatty acid-inhibited anaerobic digestion of food waste for methane production.
    Bioresour Technol 2018 May 29;265:82-92. Epub 2018 May 29.
    School of Energy and Environment, Key Laboratory of Clean Energy of Liaoning Province, Shenyang Aerospace University, No. 37 Daoyi South Avenue, Shenyang 110136, PR China. Electronic address:
    This study investigated effects of real-time recovery strategies on VFA (volatile fatty acid)-inhibited anaerobic system of FW (food waste) and identified key driver of process recovery. The long-term anaerobic system of FW encountered serious VFA (mainly propionate) inhibition. The pH adjustment (PA) strategy could not reverse process imbalance but only delayed the process failure. Read More

    Understanding the influences of different pretreatments on recalcitrance of Populus natural variants.
    Bioresour Technol 2018 May 18;265:75-81. Epub 2018 May 18.
    Department of Chemical & Biomolecular Engineering, University of Tennessee Knoxville, Knoxville, TN 37996, USA; Department of Forestry, Wildlife and Fisheries, Center for Renewable Carbon, The University of Tennessee Knoxville, Institute of Agriculture, Knoxville, TN 37996, USA; The Center for Bioenergy Innovation & BioEnergy Science Center, Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA. Electronic address:
    Four different pretreatment technologies were applied to two Populus natural variants and the effects of each pretreatment on glucose release were compared. Physicochemical properties of pretreated biomass were analyzed by attenuated total reflection Fourier transform infrared spectroscopy, gel permeation chromatography, and cross polarization/magic angle spinning carbon-13 nuclear magnetic resonance techniques. The results revealed that hemicellulose and lignin were removed to different extents during various pretreatments. Read More

    Long-term operation of electro-biocatalytic reactor for carbon dioxide transformation into organic molecules.
    Bioresour Technol 2017 Dec 26;265:66-74. Epub 2017 Dec 26.
    Industrial Biotechnology Department, Research and Development Center, Indian Oil Corporation Limited, Sector-13, Faridabad, Haryana 121007, India.
    Electro-biocatalytic reactor was operated using selectively enriched mixed culture biofilm for about 320 days with CO/bicarbonate as C-source. Biocathode consumed higher current (-16.2 ± 0. Read More

    Laccase pretreatment for agrofood wastes valorization.
    Bioresour Technol 2018 Jun 1;265:59-65. Epub 2018 Jun 1.
    Biopox srl, Via Salita Arenella 9, Naples, Italy; Dipartimento di Scienze Chimiche, Università di Napoli "Federico II", Via Cintia 4, 80126 Naples, Italy. Electronic address:
    Apple pomace, potato peels, and coffee silverskin are attractive agrofood wastes for the production of biofuels and chemicals, due to their abundance and carbohydrate content. As lignocellulosic biomasses, their conversion is challenged by the presence of lignin that prevents hydrolysis of polysaccharides, hence demanding a pretreatment step. In this work, the effectiveness of Pleurotus ostreatus laccases (with and without mediator) to remove lignin, improving the subsequent saccharification, was assessed. Read More

    Continuous ethyl oleate synthesis by lipases produced by solid-state fermentation by Rhizopus microsporus.
    Bioresour Technol 2018 May 23;265:52-58. Epub 2018 May 23.
    Departamento de Biotecnología, Universidad Autónoma Metropolitana Iztapalapa, Av. San Rafael Atlixco 186, Col. Vicentina, Mexico City C.P. 09340, Mexico. Electronic address:
    Lipases produced by solid-state fermentation were used directly as biocatalysts for continuous synthesis of ethyl oleate in a continuously stirred tank reactor. The effect of biocatalyst reutilisation, molar ratio of substrates, agitation rate and feed rate on the esterification of oleic acid with ethanol were investigated. The catalyst maintained 90% conversion for four batch cycles with a 1:2 molar ratio (oleic acid:ethanol). Read More

    Electro-biocatalytic conversion of carbon dioxide to alcohols using gas diffusion electrode.
    Bioresour Technol 2018 Feb 15;265:45-51. Epub 2018 Feb 15.
    Industrial Biotechnology Department, Research and Development Center, Indian Oil Corporation Limited, Sector-13, Faridabad, Haryana 121007, India.
    Impact of gas diffusion electrodes (GDEs) was evaluated in enhancing the CO bio-availability for its transformation to C4-organics, especially to alcohols using selective mixed culture. Observed current density was more stable (9-11 A/m) than submerged experiments reported and significantly varied with pH and respective CO solubility. Uncontrolled operating pH (starting with 8. Read More

    Effects of 4-chlorophenol wastewater treatment on sludge acute toxicity, microbial diversity and functional genes expression in an activated sludge process.
    Bioresour Technol 2018 May 31;265:39-44. Epub 2018 May 31.
    State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China.
    In this study, the effects of 4-chlorophenol (4-CP) wastewater treatment on sludge acute toxicity of luminescent bacteria, microbial diversity and functional genes expression of Pseudomonas were explored. Results showed that in the entire operational process, the sludge acute toxicity acclimated by 4-CP in a sequencing batch bioreactor (SBR) was significantly higher than the control SBR without 4-CP. The dominant phyla in acclimated SBR were Proteobacteria and Firmicutes, which also existed in control SBR. Read More

    New insights into the enhancement of biochemical degradation potential from waste activated sludge with low organic content by Potassium Monopersulfate treatment.
    Bioresour Technol 2018 May 18;265:8-16. Epub 2018 May 18.
    Henan Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450001, China.
    Waste activated sludge with low organic content (WAS-LOC) always led to the failure of anaerobic fermentation. A potentially practical technology based on SO, i.e. Read More

    Co-pyrolysis of microwave-assisted acid pretreated bamboo sawdust and soapstock.
    Bioresour Technol 2018 May 30;265:33-38. Epub 2018 May 30.
    Nanchang University, State Key Laboratory of Food Science and Technology, Nanchang 330047, China; Nanchang University, Engineering Research Center for Biomass Conversion, Ministry of Education, Nanchang 330047, China.
    Fast microwave-assisted co-pyrolysis of pretreated bamboo sawdust and soapstock was conducted. The pretreatment process was carried out under microwave irradiation. The effects of microwave irradiation temperature, irradiation time, and concentration of hydrochloric acid on product distribution from co-pyrolysis and the relative contents of the major components in bio-oil were investigated. Read More

    Insight into effects of electro-dewatering pretreatment on nitrous oxide emission involved in related functional genes in sewage sludge composting.
    Bioresour Technol 2018 May 26;265:25-32. Epub 2018 May 26.
    State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, PR China.
    Electro-dewatering (ED) pretreatment could improve sludge dewatering performance and remove heavy metal, but the effect of ED pretreatment on nitrous oxide (NO) emission and related functional genes in sludge composting process is still unknown, which was firstly investigated in this study. The results revealed that ED pretreatment changed the physicochemical characteristics of sludge and impacted NO related functional genes, resulting in the reduction of cumulative NO emission by 77.04% during 60 days composting. Read More

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