The Experts below are selected from a list of 200715 Experts worldwide ranked by ideXlab platform
Zulin Zhang - One of the best experts on this subject based on the ideXlab platform.
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temperature modulating sand consolidating cyanobacterial biomass nutrients removal and bacterial Community Dynamics in municipal wastewater
Bioresource Technology, 2020Co-Authors: Long Qian, Zhikang Deng, Xiaolong Zhou, Shubin Lan, Lie Yang, Zulin ZhangAbstract:Cultivating sand-consolidating cyanobacteria using wastewater has unique advantages on both nutrients recycling and ecological restoration by transferring excessive nutrients from wastewaters to desert areas. Although previous study showed that sand-consolidating cyanobacterium well adapted to synthetic domestic wastewater, no study has been carried out on actual wastewater. This study aims to investigate the sand-consolidating cyanobacterial biomass production and nutrients removal by cultivating Scytonema hyalinum in the municipal wastewater under different temperatures. The results showed that biomass accumulation increased with temperature from 20 ℃ to 30 ℃, while severely depressed at 35 ℃. More than 81.63% sCOD, 90.64% TDN and 97.08% TDP were removed by day 30 under each temperature except for 35℃. The inoculation of S. hyalinum strongly regulated the native wastewater bacterial Community. These results indicated that sand-consolidating cyanobacterium S. hyalinum well adapted to municipal wastewater and temperature had remarkable effects on cyanobacterial biomass accumulation, nutrients removal and wastewater native bacterial Community Dynamics.
B Fernández - One of the best experts on this subject based on the ideXlab platform.
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Characterization of microbial Community Dynamics during the anaerobic co-digestion of thermally pre-treated slaughterhouse wastes with glycerin addition
Bioprocess and Biosystems Engineering, 2019Co-Authors: Á. Rodríguez-abalde, Xavier Flotats, Miriam Guivernau, Francesc X. Prenafeta-boldu, B FernándezAbstract:Microbial Community Dynamics during the anaerobic co-digestion of pig manure, pasteurized slaughterhouse waste and glycerin were studied in a lab-scale CSTR. The feed composition was optimized through progressive co-substrate additions for enhanced methane production and organic matter removal without accumulation of intermediate compounds. Microbial Community structure of biomass samples was studied by means of qPCR and DGGE profiling of 16S rRNA genes (Bacteria and Archaea), and genus-specific qPCR of the methyl coenzyme M reductase gene (mcrA), which encodes for an enzyme universally involved in methanogenesis. The composition of the dominant bacterial populations remained relatively stable, when compared to those in the influent, but the highest changes were observed upon the introduction of glycerin. Biodiversity of archaea was restricted to a few representatives of the genera Methanosaeta and Methanosarcina, but Methanospirillum sp. was detected only when glycerin was introduced in the feeding. Glycerin supplementation coincided with the strongest increase in methane yield (from 0.22 to 0.64 m3CH4 m−3 d−1).
Lili Miao - One of the best experts on this subject based on the ideXlab platform.
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microbial Community Dynamics in an anammox reactor for piggery wastewater treatment with startup raising nitrogen load and stable performance
AMB Express, 2018Co-Authors: Qiang Huang, Weili Du, Lili MiaoAbstract:Bacterial Community Dynamics of the ANAMMOX reactor of an integrated “UASB + SHARON + ANAMMOX” system for treating piggery wastewater were investigated using the Illumina MiSeq method with samples obtained at ~ 2-week intervals during a 314-day period. With aerobic activated sludge as seeds and low content artificial wastewater (NH4+–N 50 mg/L; NO2−–N 55 mg/L) as influent for the ANAMMOX reactor, nitrogen removal was initially observed on day 38 with a removal rate 1.3 mg N L−1 day−1, and increased to 90.4 mg N L−1 day−1 on day 55 with almost complete removal of ammonia and nitrite, indicating a successful startup of the reactor. Increasing influent load stepwise to NH4+–N 272.7 mg/L/NO2−–N 300 mg/L, nitrogen removal rate increased gradually to 470 mg N L−1 day−1 on day 228, and maintained a stable level (~ 420 mg N L−1 day−1) following introduction of SHARON effluent since day 229. Correlation between microbial Community Dynamics and nitrogen removal capability was significant (r = 0.489, p 300 mg/L), suggesting their different niches and application for different loads. These findings improve the understanding of relationships among microbial Community/functional taxa, running parameters and reactor performance, and will be useful in optimizing running parameters for rapid startup and high, stable efficiency.
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association of running manner with bacterial Community Dynamics in a partial short term nitrifying bioreactor for treatment of piggery wastewater with high ammonia content
AMB Express, 2016Co-Authors: Weili Du, Qiang Huang, Lili MiaoAbstract:Optimization of running parameters in a bioreactor requires detailed understanding of microbial Community Dynamics during the startup and running periods. Using a novel piggery wastewater treatment system termed “UASB + SHARON + ANAMMOX” constructed in our laboratory, we investigated microbial Community Dynamics using the Illumina MiSeq method, taking activated sludge samples at ~2-week intervals during a ~300-day period. Ammonia-oxidizing bacteria (AOB) were further investigated by quantification of AOB amoA genes and construction of gene clone libraries. Major changes in bacterial Community composition and Dynamics occurred when running manner was changed from continuous flow manner (CFM) to sequencing batch manner (SBM), and when effluent from an upflow anaerobic sludge blanket (UASB) reactor for practical treatment of real piggery wastewater was used as influent; differences among these three experimental groups were significant (R 2 = 0.94, p < 0.01). When running manner was changed from CFM to SBM, relative abundance of the genus Nitrospira decreased sharply from 18.1 % on day 116 to 1.5 % on day 130, and to undetectable level thereafter. Relative abundance of the genus Nitrosomonas increased from ~0.67 % during the CFM period to 8.0 % by day 220, and thereafter decreased to a near-constant ~1.6 %. Environmental factors such as load ammonia, effluent ammonia, effluent nitrite, UASB effluent, pH, and DO levels collectively drove bacterial Community Dynamics and contributed to maintenance of effluent NH4 +-N/NO2 −-N ratio ~1. Theses results might provide useful clues for the control of the startup processes and maintaining high efficiency of such bioreactors.
Marcell Nikolausz - One of the best experts on this subject based on the ideXlab platform.
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Article Improved Monitoring of Semi-Continuous Anaerobic Digestion of Sugarcane Waste: Effects of Increasing Organic Loading Rate on Methanogenic Community Dynamics
2016Co-Authors: Athaydes Francisco Leite, Hans Hermann Richnow, Hauke Harms, Ro Janke, Marcell NikolauszAbstract:Abstract: The anaerobic digestion of filter cake and its co-digestion with bagasse, and the effect of gradual increase of the organic loading rate (OLR) from start-up to overload were investigated. Understanding the influence of environmental and technical parameters on the development of particular methanogenic pathway in the biogas process was an important aim for the prediction and prevention of process failure. The rapid accumulation of volatile organic acids at high OLR of 3.0 to 4.0 gvs·L−1·day−1 indicated strong process inhibition. Methanogenic Community Dynamics of the reactors was monitored by stable isotope composition of biogas and molecular biological analysis. A potential shift toward the aceticlastic methanogenesis was observed along with the OLR increase under stable reactor operating conditions. Reactor overloading and process failure were indicated by the tendency to return to a predominance of hydrogenotrophic methanogenesis with rising abundances of the orders Methanobacteriales and Methanomicrobiales and drop of th
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improved monitoring of semi continuous anaerobic digestion of sugarcane waste effects of increasing organic loading rate on methanogenic Community Dynamics
International Journal of Molecular Sciences, 2015Co-Authors: Athaydes Francisco Leite, Zuopeng Lv, Hans Hermann Richnow, Leandro Janke, Hauke Harms, Marcell NikolauszAbstract:The anaerobic digestion of filter cake and its co-digestion with bagasse, and the effect of gradual increase of the organic loading rate (OLR) from start-up to overload were investigated. Understanding the influence of environmental and technical parameters on the development of particular methanogenic pathway in the biogas process was an important aim for the prediction and prevention of process failure. The rapid accumulation of volatile organic acids at high OLR of 3.0 to 4.0 gvs·L−1·day−1 indicated strong process inhibition. Methanogenic Community Dynamics of the reactors was monitored by stable isotope composition of biogas and molecular biological analysis. A potential shift toward the aceticlastic methanogenesis was observed along with the OLR increase under stable reactor operating conditions. Reactor overloading and process failure were indicated by the tendency to return to a predominance of hydrogenotrophic methanogenesis with rising abundances of the orders Methanobacteriales and Methanomicrobiales and drop of the genus Methanosarcina abundance.
Á. Rodríguez-abalde - One of the best experts on this subject based on the ideXlab platform.
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Characterization of microbial Community Dynamics during the anaerobic co-digestion of thermally pre-treated slaughterhouse wastes with glycerin addition
Bioprocess and Biosystems Engineering, 2019Co-Authors: Á. Rodríguez-abalde, Xavier Flotats, Miriam Guivernau, Francesc X. Prenafeta-boldu, B FernándezAbstract:Microbial Community Dynamics during the anaerobic co-digestion of pig manure, pasteurized slaughterhouse waste and glycerin were studied in a lab-scale CSTR. The feed composition was optimized through progressive co-substrate additions for enhanced methane production and organic matter removal without accumulation of intermediate compounds. Microbial Community structure of biomass samples was studied by means of qPCR and DGGE profiling of 16S rRNA genes (Bacteria and Archaea), and genus-specific qPCR of the methyl coenzyme M reductase gene (mcrA), which encodes for an enzyme universally involved in methanogenesis. The composition of the dominant bacterial populations remained relatively stable, when compared to those in the influent, but the highest changes were observed upon the introduction of glycerin. Biodiversity of archaea was restricted to a few representatives of the genera Methanosaeta and Methanosarcina, but Methanospirillum sp. was detected only when glycerin was introduced in the feeding. Glycerin supplementation coincided with the strongest increase in methane yield (from 0.22 to 0.64 m3CH4 m−3 d−1).