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Bioresource Technology

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https://www.readbyqxmd.com/read/28811161/acceleration-of-electroactive-anammox-electroammox-start-up-by-switching-acetate-pre-acclimated-biofilms-to-electroammox-biofilms
#1
Jiahuan Tang, Shanshan Chen, Lingyan Huang, Xiaojuan Zhong, Guiqin Yang, Shungui Zhou
In this study, an operational method of switching acetate media to ammonium media after the formation of stable acetate-oxidizing biofilms (ACAM mode), was developed. The results showed that the start-up time was shortened to 48days in the ACAM mode compared to the AM (always ammonium media) mode (>120days), and an ammonia removal rate of 82±3% was achieved successfully and sustainably in the ACAM mode during the following long-term operation of more than 2months. Moreover, the ACAM mode was more efficient in enriching both electroammox bacteria and electricigens with Ignavibacteriaceae, Geobacteraceae and Nitrosomonadaceae as dominant families, which could favour the formation of high-performance electroammox biofilms...
August 9, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28811160/high-efficiency-removal-of-lead-from-wastewater-by-biochar-derived-from-anaerobic-digestion-sludge
#2
Shih-Hsin Ho, Yi-di Chen, Zhong-Kai Yang, Dillirani Nagarajan, Jo-Shu Chang, Nan-Qi Ren
The properties of biochar derived from waste activated sludge and anaerobic digestion sludge under pyrolysis temperature varying from 400°C to 800°C were investigated. The heavy metals adsorption efficiency of the sludge-derived biochar was also examined. Among the biochar samples tested, ADSBC600 possessing highly porous structure, special surface chemical behaviors and high thermal stability was found to remove Pb(2+) from aqueous solutions efficiently with an adsorption capacity of 51.20mg/g. The Pb(2+) adsorption kinetics and isotherm for ADSBC600 can be described using the pseudo second-order model and Langmuir isotherm, respectively...
August 7, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28810220/effectiveness-of-piggery-waste-treatment-using-microbial-fuel-cells-coupled-with-elutriated-phased-acid-fermentation
#3
K Chandrasekhar, Young-Ho Ahn
The present study evaluates the feasibility of increased power generation in microbial fuel cells (MFCs) coupled with acid elutriation fermentation. Raw piggery waste (RPW) and acid elutriation effluents (AEE) of piggery waste were used to generate bioelectricity in single-chambered air-cathode MFCs. RPW-fed MFCs exhibited stable performance after 12-days of operation, generating 540mV of open circuit voltage (OCV). RPW fed-MFCs displayed peak potential and maximal power density (PDmax) of 0.364V and 192mW/m(2) with 980Ω external resistance (Rext), respectively...
August 7, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28810216/light-intensity-as-major-factor-to-maximize-biomass-and-lipid-productivity-of-ettlia-sp-in-co2-controlled-photoautotrophic-chemostat
#4
Seong-Hyun Seo, Ji-San Ha, Chan Yoo, Ankita Srivastava, Chi-Yong Ahn, Dae-Hyun Cho, Hyun-Joon La, Myung-Soo Han, Hee-Mock Oh
The optimal culture conditions are critical factors for high microalgal biomass and lipid productivity. To optimize the photoautotrophic culture conditions, combination of the pH (regulated by CO2 supply), dilution rate, and light intensity was systematically investigated for Ettlia sp. YC001 cultivation in a chemostat during 143days. The biomass productivity increased with the increase in dilution rate and light intensity, but decreased with increasing pH. The average lipid content was 19.8% and statistically non-variable among the tested conditions...
August 7, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28810219/industrial-hemp-as-a-potential-bioenergy-crop-in-comparison-with-kenaf-switchgrass-and-biomass-sorghum
#5
Lalitendu Das, Enshi Liu, Areej Saeed, David W Williams, Hongqiang Hu, Chenlin Li, Allison E Ray, Jian Shi
This study takes combined field trial, lab experiment, and economic analysis approaches to evaluate the potential of industrial hemp in comparison with kenaf, switchgrass and biomass sorghum. Agronomy data suggest that the per hectare yield (5437kg) of industrial hemp stem alone was at a similar level with switchgrass and sorghum; while the hemp plants require reduced inputs. Field trial also showed that ∼1230kg/ha hemp grain can be harvested in addition to stems. Results show a predicted ethanol yield of ∼82gallons/dry ton hemp stems, which is comparable to the other three tested feedstocks...
August 5, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28810218/effect-of-cold-adapted-microbial-agent-inoculation-on-enzyme-activities-during-composting-start-up-at-low-temperature
#6
Qinghong Sun, Di Wu, Zhechao Zhang, Yue Zhao, Xinyu Xie, Junqiu Wu, Qian Lu, Zimin Wei
In order to put forward a method to promote composting start-up at low ambient temperature, the cold-adapted microbial agent (CAMA) was inoculated in chicken manure (CM), and compared the enzymes activities, including urease, proteases, β-glucosidase and invertase, with no CAMA group (CK). In this study, the temperature of CM reached 50°C in 53h, but it in CK was only around 30°C during the composting process. Moreover, the enzymes exhibited higher activity in CM than CK, indicating the effectiveness of CAMA...
August 5, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28803109/second-generation-ethanol-from-non-detoxified-sugarcane-hydrolysate-by-a-rotting-wood-isolated-yeast-strain
#7
Suzana F Bazoti, Simone Golunski, Diego Pereira Siqueira, Thamarys Scapini, Évelyn T Barrilli, Diego Alex Mayer, Katharina O Barros, Carlos A Rosa, Boris U Stambuk, Sérgio L Alves, Alexsandra Valério, Débora de Oliveira, Helen Treichel
This work aims to evaluate the production of second-generation ethanol from sugarcane bagasse hydrolysate without acetic acid (inhibitor) detoxification. Three isolated yeast strains from lignocellulosic materials were evaluated, and one strain (UFFS-CE-3.1.2), identified using large subunit rDNA sequences as Wickerhamomyces sp., showed satisfactory results in terms of ethanol production without acetic acid removal. A Plackett-Burman design was used to evaluate the influence of hydrolysate composition and nutrients supplementation in the fermentation medium for the second-generation ethanol production...
August 5, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28803108/enhanced-biobutanol-production-with-high-yield-from-crude-glycerol-by-acetone-uncoupled-clostridium-sp-strain-ct7
#8
Fengxue Xin, Tianpeng Chen, Yujia Jiang, Jiasheng Lu, Weiliang Dong, Wenming Zhang, Jiangfeng Ma, Min Zhang, Min Jiang
This study reports a unique acetone uncoupled Clostridium species strain CT7, which shows efficient capability of glycerol utilization with high butanol ratio. Medium compositions, such as substrate concentration, micronutrients and pH show significant effects on butanol production from glycerol by strain CT7. To further maximize butanol production, fermentation conditions were optimized by using response surface methodology (RSM). Final butanol production of 16.6g/L with yield of 0.43g/g consumed glycerol was obtained, representing the highest butanol production and yield from glycerol in the batch fermentation mode...
August 5, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28803104/exploration-of-a-mechanism-for-the-production-of-highly-unsaturated-fatty-acids-in-scenedesmus-sp-at-low-temperature-grown-on-oil-crop-residue-based-medium
#9
Qian Lu, Jun Li, Jinghan Wang, Kun Li, Jingjing Li, Pei Han, Paul Chen, Wenguang Zhou
The ability of algae to produce lipids comprising of unsaturated fatty acids varies with strains and culture conditions. This study investigates the effect of temperature on the production of unsaturated fatty acids in Scenedesmus sp. grown on oil crop residue based medium. At low temperature (10°C), synthesis of lipids compromising of high contents of unsaturated fatty acids took place primarily in the early stage while protein accumulation mainly occurred in the late stage. This stepwise lipid-protein synthesis process was found to be associated with the contents of acetyl-CoA and α-KG in the algal cells...
August 4, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28800554/anthraquinone-2-sulfonate-immobilized-to-conductive-polypyrrole-hydrogel-as-a-bioanode-to-enhance-power-production-in-microbial-fuel-cell
#10
Xinhua Tang, How Yong Ng
In this study, anthraquinone-2-sulfonate (AQS), a redox mediator, was covalently bound to conductive polypyrrole hydrogel (CPH) via electrochemical reduction of the in-situ-generated AQS diazonium salts. The porous structure and hydrophilic surface of this CPH/AQS anode enhanced biofilm formation while the AQS bound on the CPH/AQS anode worked as a redox mediator. The CPH/AQS bioanode reduced the charge transfer resistance from 28.3Ω to 4.1Ω while increased the maximum power density from 762±37mW/m(2) to 1919±69mW/m(2), compared with the bare anode...
August 4, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28810215/continuous-operation-of-thermophilic-food-waste-digestion-with-side-stream-ammonia-stripping
#11
Wei Zhang, Sonia Heaven, Charles J Banks
Digesters fed on food waste (high nitrogen content) were operated successfully over an extended period using sidestream biogas stripping to control total ammonia nitrogen (TAN) below inhibitory concentrations. This is the first time biogas stripping has been used to achieve stable thermophilic operation with undiluted substrate of this type. Stripping columns operated batch-wise treated the equivalent of 1.7-4.1% of digester contents daily at pH >10 and 70°C, with no detrimental effect on digestion. TKN removal was 54%, with potential to recover 3...
August 3, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28810214/evaluation-of-chemical-thermobaric-and-thermochemical-pre-treatment-on-anaerobic-digestion-of-high-fat-cattle-slaughterhouse-waste
#12
Peter W Harris, Thomas Schmidt, Bernadette K McCabe
This work aimed to enhance the anaerobic digestion of fat-rich dissolved air flotation (DAF) sludge through chemical, thermobaric, and thermochemical pre-treatment methods. Soluble chemical oxygen demand was enhanced from 16.3% in the control to 20.84% (thermobaric), 40.82% (chemical), and 50.7% (thermochemical). Pre-treatment altered volatile fatty acid concentration by -64% (thermobaric), 127% (chemical) and 228% (thermochemical). Early inhibition was reduced by 20% in the thermochemical group, and 100% in the thermobaric group...
August 3, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28803099/renewable-platform-chemicals-from-directional-microwave-assisted-liquefaction-coupling-stepwise-extraction-of-waste-biomass
#13
Junfeng Feng, Chungyun Hse, Zhongzhi Yang, Kui Wang, Jianchun Jiang, Junming Xu
Directional microwave-assisted liquefaction and stepwise extraction are introduced for producing platform chemicals: aromatics and monosaccharides. When sulfuric acid was used as a catalyst, a 45% monosaccharides yield and a 29% aromatics yield were obtained from bamboo with 0.3g catalyst per 18g methanol and 2g bamboo at 160°C with 10min. Approximately 78-86wt% of the six biomass materials were converted into liquid products. After the stepwise extraction and precipitation process, the yields of monosaccharide derivatives and three phenolic compound fractions were 39-45% and 28-32%, respectively...
August 3, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28803098/simultaneous-removal-of-nitrogen-and-phosphorous-from-domestic-wastewater-using-bacillus-cereus-gs-5-strain-exhibiting-heterotrophic-nitrification-aerobic-denitrification-and-denitrifying-phosphorous-removal
#14
Prangya Ranjan Rout, Puspendu Bhunia, Rajesh Roshan Dash
A newly isolated GS-5 strain exhibiting heterotrophic nitrification, aerobic denitrification and denitrifying phosphorous removal was identified as Bacillus cereus GS-5 based on its phenotypic and phylogenetic characteristics. The isolate had exhibited efficient NH4(+)-N, NO3(-)-N, NO2(-)-N and PO4(3-)-P removal from nutrient spiked real domestic wastewater with average rates of 2.62, 2.69, 1.16 and 0.42mgL(-1)h(-1), respectively under aerobic condition. Metabolic inhibitor based mass balance analysis indicated that dinitrogen gas (41%), intracellular nitrogen (29%) and intracellular phosphorous (60%) were the major fates of the initial NH4(+)-N and PO4(3-)-P...
August 3, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28803062/purification-and-reuse-of-non-point-source-wastewater-via-myriophyllum-based-integrative-biotechnology-a-review
#15
REVIEW
Feng Liu, Shunan Zhang, Pei Luo, Xuliang Zhuang, Xiang Chen, Jinshui Wu
In this review, the applications of Myriophyllum-based integrative biotechnology to remove common non-point source (NPS) pollutants, such as nitrogen, phosphorus, heavy metals, and organic pollutants (e.g., pesticides and antibiotics) are summarized. The removal of these pollutants via various mechanisms, including uptake by plant and microbial communities in macrophyte-based treatment systems are discussed. This review highlights the potential use of Myriophyllum biomass to produce animal feed, fertilizer, and other valuable by-products, which can yield cost-effective returns and attract more attention to the regulation and recycling of NPS pollutants...
August 3, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28803060/predictions-of-biochar-production-and-torrefaction-performance-from-sugarcane-bagasse-using-interpolation-and-regression-analysis
#16
Wei-Hsin Chen, Hung-Jen Hsu, Gopalakrishnan Kumar, Wojciech M Budzianowski, Hwai Chyuan Ong
This study focuses on the biochar formation and torrefaction performance of sugarcane bagasse, and they are predicted using the bilinear interpolation (BLI), inverse distance weighting (IDW) interpolation, and regression analysis. It is found that the biomass torrefied at 275°C for 60min or at 300°C for 30min or longer is appropriate to produce biochar as alternative fuel to coal with low carbon footprint, but the energy yield from the torrefaction at 300°C is too low. From the biochar yield, enhancement factor of HHV, and energy yield, the results suggest that the three methods are all feasible for predicting the performance, especially for the enhancement factor...
August 3, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28801173/impacts-of-silver-nanoparticles-on-the-nutrient-removal-and-functional-bacterial-community-in-vertical-subsurface-flow-constructed-wetlands
#17
REVIEW
Juan Huang, Chong Cao, Chunni Yan, Jialiang Liu, Qian Hu, Wenzhu Guan
The widespread utilization of silver nanoparticles (AgNPs) in industrial and commercial products inevitably raises the release into wastewater. In this study, the influences of AgNPs (0, 50 and 200μg/L) on the performance and microbial community of CWs were evaluated. Compared with the control system (without AgNPs), the COD removal was not affected, whereas the TN, NH4(+)-N, and TP removals were evidently affected in presence of AgNPs, and the effects had a positive relation with AgNPs concentration. In addition, AgNPs were effectively removed from wastewater and mainly accumulated in the soil layer and plant tissues...
August 3, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28800555/simultaneous-nitrogen-and-organics-removal-using-membrane-aeration-and-effluent-ultrafiltration-in-an-anaerobic-fluidized-membrane-bioreactor
#18
Yaoli Ye, Pascal E Saikaly, B E Logan
Dissolved methane and a lack of nutrient removal are two concerns for treatment of wastewater using anaerobic fluidized bed membrane bioreactors (AFMBRs). Membrane aerators were integrated into an AFMBR to form an aeration membrane fluidized bed membrane bioreactor (AeMFMBR) capable of simultaneous removal of organic matter and ammonia without production of dissolved methane. Good effluent quality was obtained with no detectable suspended solids, 93±5% of chemical oxygen demand (COD) removal to 14±11mg/L, and 74±8% of total ammonia (TA) removal to 12±3mg-N/L for domestic wastewater (COD of 193±23mg/L and TA of 49±5mg-N/L) treatment...
August 3, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28803105/glucose-bioconversion-profile-in-the-syngas-metabolizing-species-clostridium-carboxidivorans
#19
Ánxela Fernández-Naveira, María C Veiga, Christian Kennes
Some clostridia produce alcohols (ethanol, butanol, hexanol) from gases (CO, CO2, H2) and others from carbohydrates (e.g., glucose). C. carboxidivorans can metabolize both gases as well as glucose. However, its bioconversion profile on glucose had not been reported. It was observed that C. carboxidivorans does not follow a typical solventogenic stage when grown on glucose. Indeed, at pH 6.2, it produced first a broad range of acids (acetic, butyric, hexanoic, formic, and lactic acids), several of which are generally not found, under similar conditions, during gas fermentation...
August 2, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28803101/persulfate-oxidation-assisted-hydrochar-production-from-platanus-orientalis-leaves-physiochemical-and-combustion-characteristics
#20
Lin Gu, Sifan Wu, Binglian Li, Haifeng Wen, Daofang Zhang, Jianfeng Ye, Liang Wang
Platanus Orientalis Leaves (POL), a widely planted tree in parks and along streets, was employed by sequential persulfate oxidation (Fe(2+)and persulfate) and hydrothermal treatment (HTC) to improve the thermal stability, energy yield and combustion behavior of hydrochars (HCs). Higher heating values (HHVs) of HCs derived from persulfate pretreated POL was increased by 30.5% at mild HTC temperature (i.e., 210°C) as compared to char without pretreatment. Elevating Fe(2+)/persulfate ratio to 0.2 enables HCs with high fractions of lignin, thus promoting the energy yield going up to 64...
August 1, 2017: Bioresource Technology
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