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anaerobic oxidation of methane coupled to sulfate reduction: Consortium characteristics and application in co-removal of H_2S and methane

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Journal of Environmental Sciences 2019年第2期31卷 238-248页

作者： Lin Li Song Xue Jingru Xi State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of Sciences National Engineering Laboratory for VOCs Pollution Control Material & Technology University of Chinese Academy of Sciences State Key Laboratory of Applied Microbiology Southern China Guangdong Institute of MicrobiologyGuangdong Academy of Sciences

anaerobic sludge from a sewage treatment plant was used to acclimatize microbial colonies capable of anaerobic oxidation of methane(AOM) coupled to sulfate reduction. Clone libraries and fluorescence in situ hybridization were used to investigate the microbial population.Sulfate-reducing bacteria(SRB)(e.g., Desulfotomaculum arcticum and Desulfobulbus propionicus)and anaerobic methanotrophic archaea(ANME)(e.g., Methanosaeta sp. and Methanolinea sp.)coexisted in the enrichment. The archaeal and bacterial cells were randomly or evenly distributed throughout the consortia. Accompanied by sulfate reduction, methane was oxidized anaerobically by the consortia of methane-oxidizing archaea and SRB. Moreover, CH_4 and SO_4^(2-) were consumed by methanotrophs and sulfate reducers with CO_2 and H_2S as products. The H_3CSH produced by methanotrophy was an intermediate product during the process. The methanotrophic enrichment was inoculated in a down-flow biofilter for the treatment of methane and H_2S from a landfill site. On average, 93.33% of H_2S and 10.71% of methane was successfully reduced in the biofilter. This study tries to provide effective method for the synergistic treatment of waste gas containing sulfur compounds and CH_4.

关键词： anaerobic methane oxidation Sulphate reduction Microbial population 13C isotope-labelling Potential pathway Landfill gas

anaerobic-aerobic processes for the treatment of textile dyeing wastewater containing three commercial reactive azo dyes:Effect of number of stages and bioreactor type

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Chinese Journal of Chemical Engineering 2021年第11期34卷 228-239页

作者： Banafsheh Azimi Elham Abdollahzadeh-Sharghi Babak Bonakdarpour Chemical Engineering Department Amirkabir University of TechnologyTehranIran Environmental Group Energy DepartmentMaterials and Energy Research CenterAlborzIran

In this study,the effect of number of stages and bioreactor type on the removal performance of a sequential anaerobic-aerobic process employing activated sludge for the treatment of a simulated textile dyeing wastewater containing three commercial reactive azo dyes was considered.Two stage processes performed better than one stage ones,both in terms of overall organic and color removal,as well as the higher contribution of anaerobic stage to the overall removal performance,thereby making them a more energy efficient option.The employment of a moving bed sequencing batch biofilm reactor,which uses both suspended and attached biomass,for the implementation of the anaerobic stage of the process,was compared with a sequencing batch reactor that only employs suspended biomass.The results showed that,although there was no meaningful difference in biomass concentration between the two bioreactors,the latter reactor had better performance in terms of chemical oxygen demand(COD)removal efficiency and rate and color removal rate.Further exploratory tests revealed a difference between the roles of suspended and attached bacterial populations,with the former yielding better color removal whilst the latter had better COD removal performance.The sequential anaerobic–aerobic process,employing an aerobic membrane bioreactor in the aerobic stage resulted in COD and color removal of 77.1±7.9%and 79.9±1.5%,respectively.The incomplete COD and color removal was attributed to the presence of soluble microbial products in the effluent and the autoxidation of dye reduction metabolites,respectively.Also,aerobic partial mineralization of the dye reduction metabolites,was experimentally observed.

关键词： Wastewater anaerobic Aerobic anaerobic moving bed sequencing batch biofilm reactor anaerobic sequencing batch reactor Aerobic membrane bioreactor

Occurrence and removal of organic micropollutants in the treatment of landfill leachate by combined anaerobic-membrane bioreactor technology

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Journal of Environmental Sciences 2008年第11期20卷 1281-1287页

作者： Yiping XU[a], Yiqi ZHOU[a], Donghong WANG[a], Shaohua CHEN[a], Junxin LIU[a] Zijian WANG[a] [a]State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China

Organic micropollutants,with high toxicity and environmental concern,are present in the landfill leachate at much lower levels than total organic constituents (chemical oxygen demand (COD),biochemical oxygen demand (BOD),or total organic carbon (TOC)),and few has been known for their behaviors in different treatment processes.In this study,occurrence and removal of 17 organochlorine pesticides (OCPs),16 polycyclic aromatic hydrocarbons (PAHs),and technical 4-nonylphenol (4-NP) in landfill leachate in a comb...

关键词： anaerobic landfill leachate membrane bioreactor organic micropollutant

Biofiltration of the antibacterial drug sulfamethazine by the species Chenopodium quinoa and its further biodegradation through anaerobic digestion

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Journal of Environmental Sciences 2019年第1期31卷 54-63页

作者： Ariel E.Turcios Jutta Papenbrock Institute of Botany Leibniz University Hannover

The biofiltering capacity, distribution patterns and degradation of the antimicrobial sulfamethazine(SMT) by halophyte Chenopodium quinoa under hydroponic conditions and its further biodegradation through anaerobic digestion were evaluated. C. quinoa was cultivated for a complete life cycle under different concentrations of SMT(0, 2 and 5 mg/L) and sodium chloride(0 and 15 g/L). C. quinoa is able to uptake and partially degrade SMT. The higher the SMT concentration in the culture medium, the higher the SMT content in the plant tissue. SMT has different distribution patterns within the plant organs, and no SMT is found in the seeds.Dry crop residues containing SMT have a great potential to produce methane through anaerobic digestion and, in addition, SMT is further biodegraded. The highest specific methane yields are obtained using crop residues of the plants cultivated in the presence of salt and SMT with concentrations between 0 and 2 mg/L.

关键词： anaerobic digestion Chenopodium quinoa FISH analysis Phytoremediation Sulfamethazine biodegradation

Phosphine production in anaerobic wastewater treatment under tetracycline antibiotic pressure

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Journal of Environmental Sciences 2018年第7期30卷 239-250页

作者： Meiqing Lu Xiaojun Niu Weiyi Chen Zhu Liang Sheng You Xiaohong Gu School of Environment and Energy South China University of Technology Guangzhou 510006 China State Key Laboratory of Lake Science and Environment Nanjing 210008 China School of Environmental Science and Engineering Southern University of Science and TechnologyShenzhen Key Laboratory of Soil and Groundwater Pollution Control Shenzhen 518055 China Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control Guangzhou 510640 China China Water Resources Pearl River Planning Surveying & Designing Co. Ltd. Guangzhou 510640 China The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters Ministry of EducationSouth China University of Technology Guangzhou Higher Education Mega Centre Guangzhou 510006 China

The influence of tetracycline（TC） antibiotics on phosphine（PH3） production in the anaerobic wastewater treatment was studied. A lab-scale anaerobic baffled reactor with three compartments was employed to simulate this process. The reactor was operated in a TC-absence wastewater and 250 μg/L TC-presence wastewater for three months after a start-up period,respectively. The responses of p H, oxidation–reduction potential（ORP）, chemical oxygen demand（COD）, total phosphorus（TP）, enzymes activity（dehydrogenase and acid phosphatase）,and microbial community were investigated to reveal the effect of TC on PH3 production.Results suggested that the dehydrogenase（DH） activity, acid phosphatase（ACP） activity and COD have positive relationship with PH3 production, while p H, ORP level and the TP in liquid phase have negative relationship with PH3 production. With prolonged TC exposure, decrease in p H and increase in DH activity are beneficial to PH3 production, while decrease in COD and ACP activity are not the limiting factors for PH3 production.

关键词： Tetracycline antibiotic anaerobic Wastewater treatment Phosphine production

Enhanced anaerobic biodegradability of real coal gasification wastewater with methanol addition

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Journal of Environmental Sciences 2010年第12期22卷 1868-1874页

作者： Wei Wang,Hongjun Han,Min Yuan,Huiqiang Li State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology,Harbin 150090,China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Harbin 150090 China

Coal gasification effluent is a typical refractory industrial wastewater with a very poor anaerobic biodegradability due to its toxicity. Methanol was introduced to improve anaerobic biodegradability of real coal gasification wastewater, and the effect of methanol addition on the performance was investigated in a mesophilic upflow anaerobic sludge bed reactor with a hydraulic retention time of 24 hr. Experimental results indicated that anaerobic treatment of coal gasification wastewater was feasible with the addition of methanol. The corresponding maximum COD and phenol removal rates were 71% and 75%, respectively, with methanol concentration of 500 mg COD/L for a total organic loading rate of 3.5 kg COD/（m^3.day） and a phenol loading rate of 0.6 kg/（m^3.day）. The phenol removal rate was not improved with a higher methanol concentration of 1000 mg COD/L. Substrate utilization rate （SUR） tests indicated that the SURs of phenol were 106, 132, and 83 mg phenol/（g VSS.day） at methanol concentrations of 250, 500, and 1000 mg COD/L, respectively, and only 45 mg phenol/（g VSS.day） in the control reactor. The presence of methanol could reduce the toxicity of coal gasification wastewater and increase the biodegradation of phenolic compounds.

关键词： coal gasification wastewater anaerobic biodegradability phenol methanol

Nanoparticles in mitigating gaseous emissions from liquid dairy manure stored under anaerobic condition

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Journal of Environmental Sciences 2019年第2期31卷 26-36页

作者： Niloy Chandra Sarker Shafiqur Rahman Md.Saidul Borhan Parthiban Rajasekaran Swadeshmukul Santra Ali Ozcan Agricultural and Biosystems Engineering North Dakota State University NanoScience Technology Center University of Central Florida Burnett School of Biomedical Sciences University of Central Florida Department of Chemistry University of Central Florida Department of Materials Science and Engineering University of Central Florida

A number of mitigation techniques exist to reduce the emissions of pollutant gases and greenhouse gases(GHGs) from anaerobic storage of livestock manure. Nanoparticle(NP)application is a promising mitigating treatment option for pollutant gases, but limited research is available on the mode of NP application and their effectiveness in gaseous emission reduction. In this study, zinc silica nanogel(ZnSNL), copper silica nanogel(CuSNL), and N-acetyl cysteine(NACL) coated zinc oxide quantum dot(Qdot) NPs were compared to a control lacking NPs. All three NPs tested significantly reduced gas production and concentrations compared to non-treated manure. Overall, cumulative gas volumes were reduced by 92.73%–95.83%, and concentrations reduced by 48.98%–99.75% for H_2S, and 20.24%–99.82% for GHGs. Thus, application of NPs is a potential treatment option for mitigating pollutant and GHG emissions from anaerobically stored manure.

关键词： Nanoparticles Greenhouse gas Hydrogen sulfide anaerobic storage Gaseous reduction

Determination of operational parameters of anaerobic phase for enhanced phosphorus removal in MBR

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Journal of Environmental Sciences 2004年第1期16卷 67-72页

作者： HESheng-bing WANGBao-zhen WANGLin JIANGYi-feng WaterPollutionControlResearchCenter HarbinInstituteofTechnologyHarbin150090China

Two runs of experiments were carried out to obtain an understanding of phosphorus release and uptake under the anaerobic condition and then the aerobic condition respectively. Under anaerobic condition, it was found that the extent of phosphorus release appeared to increase with the increase of the initial organic loading rate when the initial organic loading rate was up to 0.1 gSCOD/gMLSS. When the initial organic loading rate was higher than 0.1 gSCOD/gMLSS, the amount of phosphorus release per unit mass of MLSS reached nearly a same stationary value, and it seemed this is not affected by organic loading rate when there is external available substrate remained. In addition, the effect of NOx-N on the phosphorus release and uptake was also investigated, it was proved that the denitrifiers has an advantage over polyphosphate accumulating bacteria in competition for organic substrate under anoxic condition. Therefore, the existence of NOx-N is disadvantageous to the phosphorus release. Based upon the above investigations, the process configuration of membrane bioreactor(MBR) in combination with anaerobic phase was proposed to enhance the removal of phosphorus in treating domestic wastewater. During the experimental period of four months, average removals of 92.50%, 84.25%, 100%, 94.09% and 85.33% were achieved for COD, TP, SS, NH_3-N and TN respectively.

关键词： wastewater treatment MBR anaerobic phosphorus removal

Effect of manganese oxide-modified biochar addition on methane production and heavy metal speciation during the anaerobic digestion of sewage sludge

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Journal of Environmental Sciences 2019年第2期31卷 267-277页

作者： Jianhua Li Min Zhang Zhiyin Ye Changming Yang Key Laboratory of Yangtze River Water Environment of the Ministry of Education Tongji University

Low organic matter content and high heavy metal levels severely inhibit the anaerobic digestion(AD) of sewage sludge. In this study, the effect of added manganese oxidemodified biochar composite(MBC) on methane production and heavy metal fractionation during sewage sludge AD was examined. The MBC could increase the buffering capacity,enhance the methane production and degradation of intermediate acids, buffer the pH of the culture, and stabilize the sewage sludge AD process. The application of MBC positively impacted methane production and the cumulative methane yield increased up to 121.97%,as compared with the control. The MBC addition can improve metal stabilization in the digestate. An optimum MBC dose of 2.36 g was recommended, which would produce up to 121.1 L/kg volatile solids of methane. After the AD process, even though most of the metals accumulated in the residual solids, they could be transformation from the bio-available fractions to a more stable fraction. The total organic-and sulfide-bound and residual fraction content at a 3 g dose of MBC that is 0.12 g/g dry matter were 51.06% and 35.11% higher than the control, respectively. The results indicated that the application of MBC could improve the performance of AD and promote stabilization of heavy metals in sewage sludge post the AD process.

关键词： Sewage sludge anaerobic digestion Manganese oxide-modified biochar (MBC) Methane production Heavy metals Chemical species