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 ...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.展开更多
Effects of pH,temperature,and oxygen on the production and release of phosphine in eutrophic lake sedi-ments were investigated under laboratory tests.Results indi-cated that the elimination of matrix-bound phosphine w...Effects of pH,temperature,and oxygen on the production and release of phosphine in eutrophic lake sedi-ments were investigated under laboratory tests.Results indi-cated that the elimination of matrix-bound phosphine was accelerated under initial pH 1 or 12.Phosphine levels could reach maximum under initial pH 10.The contents of phos-phine increased with the addition of alkali under pH 4-12.The rates of phosphine production and release from lake sed-iments varied with temperature.20°C was the most favorable temperature for the production of matrix-bound phosphine.Oxygen showed little effect on matrix-bound phosphine.Matrix-bound phosphine concentrations in lake sediments were concluded to be dependent on a balance of natural generation and depletion processes.展开更多
基金supported by the State Key Laboratory of Pollution Control and Resource Reuse(No.PCRRF14006)the State Key Laboratory of Lake Science and Environment(No.2016SKL011)+1 种基金the Student Research Project of South China University of Technology(2016)the Shenzhen Municipal Science and Technology Innovation Committee through project Shenzhen Key Laboratory of Soil and Groundwater Pollution Control(No.ZDSY20150831141712549)
文摘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.
基金This work was supported by the Science&Technol-ogy Key Project of the Ministry of Education(Grant No.03079)the National Natural Science Foundation of China(Grant No.20177007)the National Key Basic Research and Development(973)Program of China(Grant No.2002CB412304).
文摘Effects of pH,temperature,and oxygen on the production and release of phosphine in eutrophic lake sedi-ments were investigated under laboratory tests.Results indi-cated that the elimination of matrix-bound phosphine was accelerated under initial pH 1 or 12.Phosphine levels could reach maximum under initial pH 10.The contents of phos-phine increased with the addition of alkali under pH 4-12.The rates of phosphine production and release from lake sed-iments varied with temperature.20°C was the most favorable temperature for the production of matrix-bound phosphine.Oxygen showed little effect on matrix-bound phosphine.Matrix-bound phosphine concentrations in lake sediments were concluded to be dependent on a balance of natural generation and depletion processes.
