WEIHuai-de,LIFa-zhan,GUChao.Integrated Multistage AO Biofilm Reactor for Treatment of Rural Sewage[J].China Water & Wastewater,2023,39(17):81-87.
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Integrated Multistage AO Biofilm Reactor for Treatment of Rural Sewage

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第39卷 Number: 第17期 Page: 81-87 Column: Date of publication: 2023-09-01
Author(s):
WEI　Huai-de1;  LI　Fa-zhan2;  GU　Chao3
（1. Zhongzhou Water Holding Co. Ltd.， Zhengzhou 450046， China； 2. School of Environment and Municipal Engineering， North China University of Water Resources and Electric Power， Zhengzhou 450046， China； 3. Zhengzhou Transportation Planning Survey and Design Institute， Zhengzhou 450046， China）
Keywords:
rural sewage;  integrated reactor;  multistage AO biofilm;  biological nitrogen removal;  low-energy consumption
Abstract:
The increasing importance of rural sewage treatment increases the demand for rural sewage treatment facilities. This paper analyzed the performance of integrated multistage AO biofilm reactor for the treatment of decentralized rural domestic sewage, discussed the feasibility of the reactor, and investigated the treatment efficiency along the process. When the average water temperature was 15-28 ℃, the reflux ratio of nitrification liquid was 100% and the hydraulic residence time was 10 h, COD, ammonia nitrogen and total nitrogen concentrations of effluent were 30 mg/L, 5.74 mg/L, 31.55 mg/L, respectively. The effluent COD and ammonia nitrogen met the first level limits specified in the local standard of Henan Province: Discharge Standard of Water Pollutants for Rural Sewage Treatment Facilities (DB 41/1820-2019), and the reactor showed good impact load resistance to COD and ammonia nitrogen. In addition, the integrated sewage treatment device had a low operating cost of approximately 0.30 yuan /m3.
Last Update: 2023-09-01