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Effects of hydraulic retention time on net present value and performance in a membrane bioreactor treating antibiotic production wastewater

查看全文 作　　者：Dawei [1,2,3]Yu;Jianxing [1,2,3]Wang;Libin [1,2,3]Zheng;Qianwen [1,2,3]Sui;Hui [1,2,3]Zhong;Meixue [1,2,3]Cheng;Yuansong [1,2,3]Wei 高影响力作者 机构地区：[1]State Key Joint Laboratory of Environmental Simulation and Pollution Control,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China;[2]Department of Water Pollution Control Technology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China;[3]University of Chinese Academy of Sciences,Beijing 100049,China高影响力机构 出　　处：《Frontiers of Environmental Science & Engineering》索引2020年第14卷第6期,共13页高影响力期刊 基　　金：This work was supported by the National Key Research and Development Program of China(No.2016YFD0501405);National Natural Science Foundation of China(Grant No.21677161);Major Science&Technology Program for Water Pollution Control and Treatment of China(Nos.2017ZX07102-002 and 2018ZX07105-001). 摘　　要：A cost sensitivity analysis was performed for an industrial membrane bioreactor to quantify the effects of hydraulic retention times and related operational parameters on cost.Different hydraulic retention times(72-24 h)were subjected to a flat-sheet membrane bioreactor updated from an existing 72 h oxidation ditch treating antibiotic production wastewater.Field experimental data from the membrane bioreactor,both full-scale(500 m/d)and pilot(1.0 m3/d),were used to calculate the net present value(NPV),incorporating both capital expenditure(CAPEX)and operating expenditure.The results showed that the tank cost was estimated above membrane cost in the 38.2%,where capital expenditure contributed 24.2%more than operational expenditure.Tank construction cost was decisive in determining the net present value contributed 62.1%to the capital expenditure.The membrane bioreactor has the advantage of a longer lifespan flat-sheet membrane,while flux decline was tolerable.The antibiotics decreased to 1.87±0.33 mg/L in the MBR effluent.The upgrade to the membrane bioreactor also benefited further treatments by 10.1%-44.7%lower direct investment. 关 键 词：Antibiotic production wastewater Net present value Membrane bioreactor Hydraulic retention time Pollutant removal
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