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New Integrated Self-Refluxing Rotating Biological Contactor for rural sewage treatment
Han, Yunping; Ma, Jiawei; Xiao, Benyi; Huo, Xinchao; Guo, Xuesong
2019-04-20
Source PublicationJOURNAL OF CLEANER PRODUCTION
ISSN0959-6526
Volume217Pages:324-334
AbstractRural sewage pollution has become a serious obstacle to the development of rural areas in China. To overcome this problem, economic, efficient, stable, and low-consumption technologies are urgently needed. To this end, new equipment based on the New Integrated Self-Reflux Rotating Biological Contactor (NISRRBC) was developed for rural sewage treatment in this study. In the development process, the optimal operating parameters were determined to be 5 r/min disk rotation speed, 8 h hydraulic residence time (HRT), 40% submergence diameter of the disks (SDD), and 200% reflux ratio through orthogonal test. Then, two laboratory-scale simulations were conducted with 0% reflux as a control group and 200% reflux as a test group, and the sewage purification efficiency, sludge yield, microorganism, and microenvironment characteristics of the biofilm were investigated. The results indicated that reflux of sludge and nitrification liquid enhanced the NO3--N concentration and biomass of NISRRBC, thereby improving the pollutant removal efficiency. Compared to 0% reflux, the removal rates of COD, SS, NH4+-N, and TN increased by 5.25 +/- 4.18, 5.49 +/- 0.64, 5.67 +/- 2.68, and 32.63 +/- 3.67%, respectively, at 200% reflux. The COD, SS, NH4+-N, and TN concentrations in the effluent were 15.34 +/- 7.29, 5.32 +/- 2.33, 1.70 +/- 2.47, and 12.73 +/- 3.94 mg/L, respectively. At 200% reflux, the biofilm formed a favorable gradient for microenvironmental conditions and functional flora, thus facilitating the removal of pollutants in sewage. The operating results of the pilot-scale NISRRBC indicate that the effluent meet the Class B Discharge standard of pollutants for municipal wastewater treatment plants (GB, 189182002). Overall, NISRRBC is one of the priority choices for rural sewage treatment owing to its low sludge yield, integrated design concept, and simple operation mode. (C) 2019 Elsevier Ltd. All rights reserved.
Department环境水质学国家重点实验室
KeywordRural sewage treatment New Integrated Self-Refluxing Rotating Biological Contactor Pilot scale Pollutant removal efficiency Microenvironmental property
Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/43099
Collection环境水质学国家重点实验室
Affiliation1.Chinese Acad Sci, Dept Water Pollut Control Technol, Ecoenvironm Sci Res Ctr, Beijing 100085, Peoples R China
2.Chinese Acad Sci, State Key Lab Environm Aquat Chem, Ecoenvironm Sci Res Ctr, Beijing 100085, Peoples R China
3.Dalian Univ, Sch Environm & Chem Engn, Dalian 116622, Peoples R China
Recommended Citation
GB/T 7714
Han, Yunping,Ma, Jiawei,Xiao, Benyi,et al. New Integrated Self-Refluxing Rotating Biological Contactor for rural sewage treatment[J]. JOURNAL OF CLEANER PRODUCTION,2019,217:324-334.
APA Han, Yunping,Ma, Jiawei,Xiao, Benyi,Huo, Xinchao,&Guo, Xuesong.(2019).New Integrated Self-Refluxing Rotating Biological Contactor for rural sewage treatment.JOURNAL OF CLEANER PRODUCTION,217,324-334.
MLA Han, Yunping,et al."New Integrated Self-Refluxing Rotating Biological Contactor for rural sewage treatment".JOURNAL OF CLEANER PRODUCTION 217(2019):324-334.
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