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Robustness of anammox granular sludge treating low-strength sewage under various shock loadings:microbial mechanism and little N2O emission

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Journal of Environmental Sciences 2019年第12期31卷 141-153页

作者： Shanyun Wang Guibing Zhu Yifei Li Xiaoxia Wang Jiemin Zhou Yongzhen Peng Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Enuironmental SciencesChinese Academy of SciencesBeijing 100085China Jiangnan University School of Environmental and Civil EngineeringWuxiChina National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology Beijing University of TechnologyBdjing 100124China University of Chinese Academy of Sciences Beijing 100049China

With the increasing application of anammox for the treatment of high-strength industrial wastewater,application of anammox in municipal sewage has been gaining more *** granulation in particular enhances the enrichment and retention of anammox bacteria in municipal sewage treatment ***,the performance of granular sludge under continuous and varying hydraulic loading shock remains little *** this study,the robustness of anammox granular sludge in treating lowstrength municipal sewage under various shock loadings was *** showed that an upflow anaerobic sludge blanket(UASB)reactor with anammox granules performed well,with anammox specific activity up to 0.28 kg N/kg VSS/day and anti-loading shock capability up to 187.2 L/day during the 8-month testing *** accumulation rate of N2O(<0.01 kg N/kg VSS/day)in the liquid phase was seven times higher than that of the gas phase,which could be mainly attributed to the incomplete denitrification and insufficient carbon ***,only a small part of the produced N2O escaped into the ***-throughput sequencing and molecular ecological network analyses also identified the bacterial diversity and community structure,indicating the potential resistance against loading *** composition and structural analyses showed that polysaccharides were an important functional component in the tightly bound extracellular polymeric substances(TB-EPS),which was the major EPS layer of anammox *** electron microscopy(SEM)also showed that the gaps in between the anammoxclusters in the granules inhibit the flotation of the sludge and ensure efficient settling and retention of anammox granules.

关键词： Anammox Low-strength sewage Varying shock loadings microbial mechanism N2O emission

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A review on microbial metabolism to increase coalbed methane generation and coal pretreatment to improve its bioavailability

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Frontiers of Earth Science 2023年第1期17卷 218-229页

作者： Yang LI Shuheng TANG Jian CHEN Songhang ZHANG School of Earth and Environment Anhui University of Science and TechnologyHuainan 232001China State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines Anhui University of Science and TechnologyHuainan 232001China School of Energy Resource China University of GeosciencesBeijing 100083China Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Enrichment mechanism(Ministry of Education) Beijing 100083China Key Laboratory of Strategy Evaluation for Shale Gas(Ministry of Land and Resources) Beijing 100083China

Abundant unminable coal in deep strata and abandoned mines are also precious sources of clean gas energy,under which biotransformation is a potential *** recent years,substantial progress has been made in laboratory research on coal degradation to produce methane by microbial *** paper systematically reviews the research progress of microbial enhancement and microbial stimulation of coal,physicochemical pretreatments of coal,and environmental factors affecting coal *** research idea of coal biotransformation should aim at field production increase and gradually clarify the microbial mechanism of coal degradation and the regional distribution and functional composition of microbial communities on the block *** research on coal biotransformation helps improve the development level of coalbed methane and the sustainable development of unconventional natural gas resources.

关键词： coal biotransformation methanogens microbial mechanism in situ environment carbon cycle

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Biochar reduces colloidal phosphorus in leachate by regulating phoD- and phoC-harboring microbial communities during drying/rewetting cycles

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Biochar 2023年第1期5卷 1014-1028页

作者： Xiaochun Wang Hongnuo Ge Yunying Fang Chunlong Liu Kamel M.Eltohamy Zekai Wang Xinqiang Liang Key Laboratory of Watershed Non-point Source Pollution Control and Water Eco-security of Ministry of Water Resources College of Environmental and Resource SciencesZhejiang UniversityHangzhou 310058China College of Agriculture and Biotechnology Zhejiang UniversityHangzhou 310058China Australian Rivers Institute School of Environment and ScienceGriffith UniversityNathan CampusBrisbaneQLD 4111Australia Key Laboratory of Mollisols Agroecology Northeast Institute of Geography and AgroecologyChinese Academy of SciencesHarbin 150081China

Drying and rewetting(DRW)events cause the release of colloidal phosphorus(P_(coll),1-1000 nm)in leachate,and biochar is considered an effective inhibitor;however,the microbial mechanism remains *** this study,three successive DRW cycles were performed on the soil columns to assess the effect of biochar addition on P_(coll) content and its possible associates,including phosphatase-producing microbial populations(phoD- and phoC-harboring microbial communities)and alkaline/acid phosphatase(ALP/ACP)*** showed that the biochar addition significantly decreased the P_(coll) by 15.5-32.1%during three DRW *** structural equation model(SEM)confirmed that biochar addition increased phoD- and phoC-harboring microbial communities and ALP/ACP activities,which reduces the release of P_(coll) into *** addition,the manure biochar was more effective than the straw biochar in promoting competition and cooperation in the co-occurrence network(2-5%nodes increased on average),and the key taxa Proteobacteria and Cyanobacteria were identified as the dominant species of potential ALP/ACP activities and P_(coll) *** findings provide a novel understanding of biochar reducing P_(coll) loss from the phosphatase perspective by regulating the phoD-and phoC-harboring communities during DRW events.

关键词： Drying and rewetting events Alkaline/acid phosphatase microbial mechanism Proteobacteria Cyanobacteria

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Co-incorporation of Chinese milk vetch(Astragalus sinicus L.)and chemical fertilizers alters microbial functional genes supporting short-time scale positive nitrogen priming effects in paddy soils

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Pedosphere 2024年第3期34卷 567-576页

作者： Limin WANG Chunmei HE Dongfeng HUANG Juhua YU Cailing LIU Qinghua LI Yibin HUANG Juan LI Fei WANG Institute of Resources Environment and Soil FertilizerSoil and Fertilizer InstituteFujian Academy of Agricultural SciencesFuzhou 350012(China) School of Resources and Environment Engineering Anhui UniversityHefei 230601(China)

Nitrogen(N)priming is a microbially mediated biochemical process as affected by different incorporation ***,little information is known about the microbial mechanisms driving the response of N priming to co-operation of Chinese milk vetch(CMV,Astragalus sinicus L.)and different rates of chemical fertilizers in paddy soils in South ***,an anaerobic incubation experiment was conducted to study N priming effects(PE)and their relationships with soil microbial functional genes after CMV incorporation alone(M),co-incorporation of CMV with 100%(normal dosage)chemical fertilizers(MC100),and co-incorporation of CMV with 80% chemical fertilizers(MC80).Co-incorporation of CMV and chemical fertilizers enhanced the short-time scale(the first 20 d of incubation)positive PE of N,while no significant differences existed among the three treatments on day 60 or 90 of incubation(P>0.05).Compared with the M treatment,gross priming effect(GPE)in the MC100 and MC80 treatments significantly increased by 34.0% and 31.3%,respectively,and net priming effect(NPE)increased by 47.7% and 47.8%,respectively,during the first 20 d of incubation(Pmicrobial functional genes involved in N mineralization(gdhA and gdh2),assimilatory nitrate reduction(nasB),and nitrification(amoB)were significantly correlated with N priming under different incorporation practices during the incubation period(Pmicrobial community functional gene structure,which may accelerate mineralization and assimilatory nitrate reduction and inhibit

关键词： green manure gross priming effect incorporation practice microbial mechanism net priming effect rice field soil

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Effect of self-alkalization on nitrite accumulation in a high-rate denitrification system:performance,microflora and enzymatic activities

Effect of self-alkalization on nitrite accumulation in a hig...

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中国生物工程学会第六次全国会员代表大会暨第九届学术年会

作者： Wei Li Ping Zheng Department of Environmental Engineering College of Environmental and Resource ScienceZhejiang University

The self-alkalization of denitrifying automatic circulation(DAC) reactor resulted in a large increase of pH up to 9.20 and caused a tremendous accumulation of nitrite up to 451.1±49.0 mgN·L at nitrate loading rate(NLR) from 35 kgN·m·d to 55 kgN·m·*** nitrite accumulation was greatly relieved even at the same NLR once the pH was maintained at 7.6±0.2 in the *** assays indicated that the long-term bacterial exposure to high pH significantly inhibited the activity of copper type nitrite reductase(NirK) rather than the cytochrome cd1 type nitrite reductase(NirS).The terminal restriction fragment length polymorphism(T-RFLP) analysis revealed that the dominant denitrifying bacteria shifted from the NirS-containing Thauear sp.27 to the NirK-containing Hyphomicrobium nitrativorans strain NL23 during the *** significant nitrite accumulation in the high-rate denitrification system could be therefore,due to the inhibition of Cu-containing NirK by high pH from the *** results suggest that the NirK-containing *** strain NL23 could be an ideal functional bacterium for the conversion of nitrate to nitrite,***,which could be combined with anaerobic ammonium oxidation(Anammox) to develop a new process for nitrogen removal from wastewater.

关键词： Denitrification High-load Self-alkalization Nitrite accumulation microbial mechanism

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