Rapid start-up of enhanced hybrid anaerobic reactor for rural domestic sewage treatment
LIU Jianwei1,,, LIU Xueli1, GAO Liutang1,2, KANG Xinyue1, HU Ming3, WANG Peijing3 1.Beijing Engineering Research Center of Sustainable Urban Sewage System Construction and Risk Control, Beijing University of Civil Engineering and Architecture, Beijing 100044, China 2.Shijiazhuang Yiling Pharmaceutical Co. Ltd., Shijiazhuang 050035, China 3.Beijing Water Science and Technology Institute, Beijing 100048, China
Abstract:In order to solve the problems of long start-up period and low treatment efficiency of conventional single anaerobic reactor for rural domestic sewage treatment, a novel enhanced hybrid anaerobic reactor which integrated anaerobic baffled reactor with packing and anaerobic filter was built, and its start-up method and operating characteristics were studied. The start-up of this hybrid reactor was performed by inoculating the activated sludge from wastewater treatment plant and gradually shortening its HRT. The results showed that after 25 days running, the effluent COD concentration decreased to 65 mg·L?1 and the COD removal efficiency reached 70.7%, the pH and Eh in each compartment were stabilized at 6.9~7.0 and (?243±6)~(?289±6) mV, respectively, and the CH4 production was 365 mL·d?1, indicating the successful start-up of the hybrid reactor. Of which the baffled unit played a dominant role in COD removal, and the sludge growth and biofilm formation in the baffled unit were good. The results showed that the enhanced hybrid anaerobic reactor for rural sewage treatment can achieve the rapid start-up, it can provide reference for the practical application of this hybrid reactor in rural domestic sewage treatment. Key words:rural domestic sewage/ enhanced hybrid anaerobic reactor/ anaerobic baffled reactor/ anaerobic filter/ rapid start-up of the reactor.
图1强化复合厌氧反应器结构示意图 Figure1.Structure diagram of enhanced hybrid anaerobic reactor
图2反应器启动期进、出水COD及COD去除率的变化 Figure2.Variations of COD concentration in influent and effluent and COD removal efficiency during start-up period of the reactor
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1.Beijing Engineering Research Center of Sustainable Urban Sewage System Construction and Risk Control, Beijing University of Civil Engineering and Architecture, Beijing 100044, China 2.Shijiazhuang Yiling Pharmaceutical Co. Ltd., Shijiazhuang 050035, China 3.Beijing Water Science and Technology Institute, Beijing 100048, China Received Date: 2020-01-15 Accepted Date: 2020-06-14 Available Online: 2020-09-05 Keywords:rural domestic sewage/ enhanced hybrid anaerobic reactor/ anaerobic baffled reactor/ anaerobic filter/ rapid start-up of the reactor Abstract:In order to solve the problems of long start-up period and low treatment efficiency of conventional single anaerobic reactor for rural domestic sewage treatment, a novel enhanced hybrid anaerobic reactor which integrated anaerobic baffled reactor with packing and anaerobic filter was built, and its start-up method and operating characteristics were studied. The start-up of this hybrid reactor was performed by inoculating the activated sludge from wastewater treatment plant and gradually shortening its HRT. The results showed that after 25 days running, the effluent COD concentration decreased to 65 mg·L?1 and the COD removal efficiency reached 70.7%, the pH and Eh in each compartment were stabilized at 6.9~7.0 and (?243±6)~(?289±6) mV, respectively, and the CH4 production was 365 mL·d?1, indicating the successful start-up of the hybrid reactor. Of which the baffled unit played a dominant role in COD removal, and the sludge growth and biofilm formation in the baffled unit were good. The results showed that the enhanced hybrid anaerobic reactor for rural sewage treatment can achieve the rapid start-up, it can provide reference for the practical application of this hybrid reactor in rural domestic sewage treatment.