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Bioresource Technology

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https://www.readbyqxmd.com/read/30415072/enhancing-the-production-of-light-olefins-and-aromatics-from-catalytic-fast-pyrolysis-of-cellulose-in-a-dual-catalyst-fixed-bed-reactor
#1
Mingfa Yang, Jingai Shao, Haiping Yang, Kuo Zeng, Zhengshun Wu, Yingquan Chen, Xiaowei Bai, Hanping Chen
In this study, the effects of a macroporous catalyst (CaO), mesoporous catalyst (MCM-41), and microporous catalysts (ZSM-5 and SAPO-34) on the production of light olefins and aromatics from cellulose catalytic fast pyrolysis were investigated in a dual-catalyst fixed bed reactor. Further the fractional catalytic pyrolysis of MCM-41 or CaO with ZSM-5 or SAPO-34 was explored. The results showed that ZSM-5 was the most efficient catalyst for the formation of light olefins and aromatics followed by MCM-41, CaO and SAPO-34, and no aromatics were found with SAPO-34 only...
November 3, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/30419446/evaluation-of-inhibitory-effect-and-feasible-utilization-of-dilute-acid-pretreated-rice-straws-on-succinate-production-by-metabolically-engineered-escherichia-coli-as1600a
#2
Surawee Jampatesh, Apichai Sawisit, Nonthaporn Wong, Sirima Suvarnakuta Jantama, Kaemwich Jantama
This work demonstrated a pioneer work in the pre-treatment of rice straw by phosphoric acid (H3 PO4 ) for succinate production. The optimized pre-treatment condition of rice straw was at 121 °C for 30 min with 2 N H3 PO4 . With this condition, total sugar concentration of 31.2 g/L with the highest hemicellulose saccharification yield of 94% was obtained. The physicochemical analysis of the pre-treated rice straw showed significant changes in its structure thus enhancing enzymatic saccharification. Succinate concentrations of 78...
November 2, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/30408644/effect-of-hydroxypropyl-%C3%AE-cyclodextrin-on-the-cometabolism-of-phenol-and-phenanthrene-by-a-novel-chryseobacterium-sp
#3
Meng Xiao, Xiangyang Yin, Hengjun Gai, Honglei Ma, Yanfeng Qi, Kun Li, Xia Hua, Meng Sun, Hongbing Song
Cometabolic degradation is an effective method to remove the polycyclic aromatic hydrocarbons (PAHs) with phenol as growth substrate from coal chemical wastewater (CCW). Unfortunately, the toxicity and low solubility of PAHs always restrict their degradation. In this study, Chryseobacterium sp. H202 was firstly isolated from the aerobic segment of CCW. Then, to improve the cometabolic degradation of PAHs, the effects of hydroxypropyl-β-cyclodextrin (HPCD) were investigated. Phenanthrene removal was accelerated in the presence of phenol; however, the degradation of phenol was inhibited because of the toxicity of phenanthrene...
November 2, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/30399608/microwave-assisted-co-pyrolysis-of-chlorella-vulgaris-and-wood-sawdust-using-different-additives
#4
Lin Chen, Zhaosheng Yu, Hao Xu, Kuangyu Wan, Yanfen Liao, Xiaoqian Ma
The microwave-assisted co-pyrolysis of Chlorella vulgaris (CV), wood sawdust (WS) and their blends with additives were investigated. There was a higher liquid and solid yield with silicon carbide (SiC) than activated carbon (AC) in most of samples. Microwave-assisted pyrolysis with additives behaved a positive effect on deoxygenation and aromatization, but not apparent denitrification. With the increase of CV proportion, aromatic hydrocarbons decreased, but aliphatic hydrocarbons increased using AC. High selectivity of phenols was reached at the sample of WS (relative content as 43...
November 1, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/30391108/corrigendum-to-biodegradation-of-polyester-polyurethane-during-commercial-composting-and-analysis-of-associated-fungal-communities-bioresour-technol-158-2014-374-377
#5
Urooj Zafar, Petrus Nzerem, Adrian Langarica-Fuentes, Ashley Houlden, Alan Heyworth, Alberto Saiani, Geoff D Robson
No abstract text is available yet for this article.
November 1, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/30419445/arthrospira-maxima-of15-biomass-cultivation-at-laboratory-and-pilot-scale-from-sugarcane-vinasse-for-potential-biological-new-peptides-production
#6
Grecia E Barriga Montalvo, Vanete Thomaz-Soccol, Luciana P S Vandenberghe, Júlio C Carvalho, Craig B Faulds, Emmanuel Bertrand, Maria R M Prado, Sandro J R Bonatto, Carlos R Soccol
An environmental friendly process was developed to produce Arthrospira maxima's biomass from sugarcane vinasse, which was generated in a bioethanol production chain, at laboratory and pilot scale. Peptides fractions were than obtained from enzymatically hydrolyzed biomass. High microalgae biomass productivities were reached (0.150 g L-1  day-1 ) coupled with a significant reduction of BOD and COD (89.2 and 81%, respectively). Three peptide fractions were obtained from microalgae biomass through single or sequential enzymatic hydrolysis...
October 31, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/30391842/microbial-community-evolution-and-fate-of-antibiotic-resistance-genes-along-six-different-full-scale-municipal-wastewater-treatment-processes
#7
Juan Tong, Anping Tang, Hongyan Wang, Xingxin Liu, Zhaohua Huang, Ziyue Wang, Junya Zhang, Yuansong Wei, Yanyan Su, Yifeng Zhang
The evolution of microbial community and the fate of ARGs along different full-scale wastewater treatment processes (i.e., Anaerobic-Anoxic-Oxic, Oxidation Ditch, and Cyclic Activated Sludge System) were investigated in this study. We found that the sludges of bioreactors treating similar influent showed the similar microbial communities, independent of the treatment technologies. The horizontal gene transfer (HGT) mainly occurred in aeration tank rather that anaerobic/anoxic tank. More co-occurrence of potential pathogens and ARGs was found in wastewater than in sludge...
October 31, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/30408643/biodegradation-of-metal-complex-naphthol-green-b-and-formation-of-iron-sulfur-nanoparticles-by-marine-bacterium-pseudoalteromonas-sp-cf10-13
#8
Shuhua Cheng, Na Li, Li Jiang, Yating Li, Baiheng Xu, Weizhi Zhou
Treatment of metal complex dye wastewater has attracted growing attention due to the degradation-resistant, high cost and potential hazards of current techniques. This study reported a marine bacterium (Pseudoalteromonas sp CF10-13) with potential performance in decolorization and degradation of a metal complex dye-Naphthol Green B (NGB) at wide ranges of salinity, dye concentration and alkalinity under anaerobic conditions. It was inferred that the secretion of electron mediators in soluble extracellular metabolites by P...
October 30, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/30391846/biodegradability-and-mechanism-of-florfenicol-via-chlorella-sp-utex1602-and-l38-experimental-study
#9
Chunfeng Song, Yanling Wei, Yiting Qiu, Yu Qi, Yang Li, Yutaka Kitamura
In this work, florfenicol removal via two kinds Chlorella sp. (UTEX1602 and L38) was investigated. The experimental results indicated that FF could be removed by biodegradation associated with microalgae growth. Compared to Chlorella sp. UTEX1602, L38 had a good self-adjustment capacity at the condition of high initial FF concentration. The biodegradation of FF followed the first order kinetic model with half-lives ranged from 3.53 to 7.63 days at different initial concentration. The removal efficiency of FF could achieve 97% when the FF concentration was set at 46 mg·L-1 ...
October 30, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/30399609/performance-and-microbial-protein-expression-during-anaerobic-treatment-of-alkali-decrement-wastewater-using-a-strengthened-circulation-anaerobic-reactor
#10
Bo Yang, Qing Wang, Jinshao Ye, Hui Xu, Yanbiao Liu, Fang Li, Xinshan Song, Jianshe Liu, Zhiwei Wang, Wolfgang Sand
Herein, a strengthened circulation anaerobic (SCA) reactor was employed for the treatment of actual alkali-decrement wastewater. The degradation mechanism of polyester oligomers and the relationship between the treatment performance and microbial community structure were systematically investigated using various advanced techniques. Results suggest that the accumulation of volatile fatty acids has an inhibitory effect on methanogenic activity. Molecular weight distributions suggest that only incomplete degradation of oligomers was achieved, due to acetogenic inhibition in the lower part of the SCA reactor...
October 29, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/30396112/enhancement-of-monascus-pigment-productivity-via-a-simultaneous-fermentation-process-and-separation-system-using-immobilized-cell-fermentation
#11
Jun Liu, Ting Guo, Yunchuan Luo, Xueying Chai, Jingyan Wu, Wen Zhao, Pengfei Jiao, Feijun Luo, Qinlu Lin
A mutant Monascus purpureus strain, M183, which produced monascus pigments (MPs) at 8460 U/g via solid-state batch-fermentation, was generated using the atmospheric and room temperature plasma (ARTP) mutation system. The optimal glucose concentration (80 g/L) in traditional fermentation media that yielded the highest MPs productivity was determined. Response surface methodology (RSM) was applied to maximize MPs production using liquid-state batch-fermentation. Under optimal conditions (0.58 g/L MgSO4 ·7H2 O, 0...
October 29, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/30408645/characteristics-of-ultra-fine-bubble-water-and-its-trials-on-enhanced-methane-production-from-waste-activated-sludge
#12
Di Wang, Xiaojing Yang, Caixing Tian, Zhongfang Lei, Noriko Kobayashi, Motoyoshi Kobayashi, Yasuhisa Adachi, Kazuya Shimizu, Zhenya Zhang
In this study biogas production efficiency was evaluated by adding ultra-fine bubble water (UFBW) into waste activated sludge (WAS) through anaerobic digestion (AD). Four kinds of gases, i.e. Air, N2 , CO2 and H2 were introduced into tap water (TW) to prepare the UFBW with their properties being first investigated. Results show that hundreds of millions of nanoscale bubbles with the negative zeta potential could be stable in the UFBW for longer than two weeks whereas almost no nanometer bubbles could be detected in the raw TW...
October 28, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/30391847/a-semi-empirical-approach-towards-predicting-producer-gas-composition-in-biomass-gasification
#13
Priyabrata Pradhan, Amit Arora, Sanjay M Mahajani
The paper provides a comparison of five distinct models, often used in thermodynamic equilibrium modeling that allows the study of feedstock effect on gasification process. The five models were thus formulated and solved using MATLAB software. The results were compared with published experimental data. The model based on equilibrium constant derived using methane formation reaction and water gas shift reaction showed comparatively better performance. Once the model was selected, the response surface analysis was employed to predict the parameters, such as reactor temperature and feedstock moisture content, for a maximum heating value of the producer gas...
October 28, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/30391844/obtaining-fermentable-sugars-and-bioproducts-from-rice-husks-by-subcritical-water-hydrolysis-in-a-semi-continuous-mode
#14
Ederson R Abaide, Gustavo Ugalde, Marco Di Luccio, Regina de F P M Moreira, Marcus V Tres, Giovani L Zabot, Marcio A Mazutti
This work aimed at producing fermentable sugars and bioproducts from rice husks by subcritical water hydrolysis at 25 MPa in a semi-continuous mode. The influences of temperature (180 °C; 220 °C; 260 °C) and liquid/solid ratio (7.5 g water/g husks; 15 g water/g husks) on reducing sugar yield (YRS ), efficiency (E), kinetic profiles (0-15 min), composition of sugars, inhibitors and organic acids, and physicochemical characteristics of the remaining solid material were evaluated and discussed in the work...
October 28, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/30391843/enhancement-of-co-2-biofixation-and-bioenergy-generation-using-a-novel-airlift-type-photosynthetic-microbial-fuel-cell
#15
Ming Li, Minghua Zhou, Chaolin Tan, Xiaoyu Tian
This study developed a novel airlift type photosynthetic microbial fuel cell (AL-PMFC) using Chlorella vulgaris to enhance the CO2 biofixation and bioenergy (bioelectricity and biodiesel) generation. The performances of AL-PMFC in CO2 fixation rate, lipid accumulation and power output were investigated and compared with a bubbling-type photosynthetic microbial fuel cell (B-PMFC). Due to the enhanced mass transfer, the CO2 fixation rate of AL-PMFC reached 835.7 mg L-1  d-1 , 28.6% higher than that of B-PMFC...
October 28, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/30390538/inhibitory-effects-of-free-propionic-and-butyric-acids-on-the-activities-of-hydrogenotrophic-methanogens-in-mesophilic-mixed-culture-fermentation
#16
Wei Zhang, Fang Zhang, Yong-Xin Li, Raymond Jianxiong Zeng
The aim of this work was to study the inhibitory of free propionic acid (FPA) and free butyric acid (FBA) on enriched hydrogenotrophic methanogens. It demonstrated that concentrations of FPA and FBA were correlated well with the specific methanogenic activity. Coenzyme M concentrations also agreed well with the trends of FPA and FBA. Two fators of C50% (concentration at 50% inhibition) and CRC (recoverable concentration from inhibition) were used to quantitively analyze the inhibitory order using the former result of free acetic acid (FAA) and the results of FBA and FPA...
October 28, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/30384213/energy-balance-for-biodiesel-production-processes-using-microbial-oil-and-scum
#17
Lalit R Kumar, Sravan Kumar Yellapu, Xiaolei Zhang, R D Tyagi
Biodiesel production using microbial oil is a promising technology. The main aim of this study is to check practical feasibility (in terms of energy balance) of different biodiesel production processes. Mass and energy balance of biodiesel production have been performed for 3 separate processes: (1) microbial lipid production from T. oleaginosus using waste substrates followed by INRS downstream process (2) microbial lipid production from pure substrate using R. toruloides followed by traditional and INRS downstream process and 3) oil extraction from scum and conversion to biodiesel...
October 28, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/30391845/decreased-enzyme-activities-ammonification-rate-and-ammonifiers-contribute-to-higher-nitrogen-retention-in-hyperthermophilic-pretreatment-composting
#18
Ying Huang, Danyang Li, Lin Wang, Cheng Yong, Enhui Sun, Hongmei Jin, Hongying Huang
Hyperthermophilic pretreatment composting (HPC) is superior to traditional composting (TC) with shortened maturity period and increased nitrogen (N) retention. However, the mechanism associated with N retention in HPC remains unclear. In this study, we compared the impact of HPC and TC on N retention, and found the proportion of N retained in the final compost was 83.3% and 67.2% for HPC and TC, respectively. Decreased ammonification rate, urease and protease activities together with an elevated temperature were found in HPC...
October 27, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/30388579/porous-biochar-composite-assembled-with-ternary-needle-like-iron-manganese-sulphur-hybrids-for-high-efficiency-lead-removal
#19
Fan Yang, Shuaishuai Zhang, Dong-Wan Cho, Qing Du, Jingpeng Song, Daniel C W Tsang
Hierarchical porous biochar derived from corn straw containing ternary needle-like iron-manganese-sulphur composites (Fe-Mn-S@HCS) are fabricated, and their physicochemical characteristics and performance for Pb removal were examined in detail. Introduction of Mn (transition metal) into Fe-biochar composites can effectively alter the chemical state of Fe; simultaneous doping with S can enhance cation exchange for Pb removal. High uptake of Pb by Fe-Mn-S@HCS in a short time period was observed with the adsorption capacity of 181...
October 27, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/30385029/assessment-of-methane-emissions-and-energy-recovery-potential-from-the-municipal-solid-waste-landfills-of-delhi-india
#20
Pooja Ghosh, Goldy Shah, Ram Chandra, Shivali Sahota, Himanshu Kumar, Virendra Kumar Vijay, Indu Shekhar Thakur
Rising rate of MSW generation and unscientific disposal in the open dumping sites are responsible for emission of high concentrations of methane in developing countries. IPCC Default method (DM), First-order decay (FOD) and LandGEM were used to estimate methane emissions from the unengineered landfill sites of Delhi-Okhla, Bhalswa and Ghazipur between 1984 and 2015. During the period, the total CH4 emissions was found to be 1288.99, 311.18, 779.32 Gg from the 3 landfill sites of Delhi as predicted by DM, FOD and LandGEM respectively...
October 27, 2018: Bioresource Technology
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