摘要
根据农村生活污水的特点及选择处理工艺应考虑的因素,构建了适应分散式生活污水处理要求的"厌氧消化—缺氧—好氧—人工湿地"组合工艺,通过示踪试验及物料衡算的方法研究了厌氧生物滤池的净化机理。在此基础上,系统阐述了厌氧生物滤池反应单元在"厌氧消化—缺氧—好氧—人工湿地"工艺去除化学需氧量(COD)的作用,着重分析了水力停留时间(HRT)对厌氧生物滤池处理效果、产气效能、运行特性的影响规律。研究结果表明,厌氧生物滤池单元经过65 d的中低温驯化后稳定运行,在HRT为72 h条件下,厌氧系统污水COD去除率约37.8%。与跌水接触氧化和人工湿地工艺联用后,平均出水COD 39.3 mg·L-1,平均去除率为86.2%,满足《城镇污水处理厂污染物排放标准》(GB18918—2002)中COD项目的一级A标准。
A pre-production-scale investigation was accomplished to the combined ＂anaerobic digestion-anoxia-aerobic-constructed wet- land＂ system. The mechanism of anaerobic filters was investigated through the tracer study and mass balance calculation,the CODCr re- moval efficiencies of anaerobic filter was analyzed, and the effect of hydraulic retention time （HRT） on the efficiency and operational characteristics of the large height-diameter ratio anaerobic filter reactor were evaluated. The results revealed that the anaerobic reactor started successfully after 65 days at medium-low temperature. During the stable running period, when the hydraulic retention time （HRT） was 72 h, the removal rate of COD（Cr） was remained about 37.8%. The combined process which consisted of aerobic diges- tion-anoxic regulation-waterfall aeration contact oxidation-vegetated constructed wetland to deal with decentralized domestic sewage could achieve good removal effect, the average concentration of the effluent were 39.3 mg/L,the average removal rate in turn were 86. 2%, which reached the class A emission standard in the＂urban sewage treatment plant pollutant discharge standard＂（ GB 18918 -2002）.
出处
《四川大学学报（工程科学版）》
EI
CAS
CSCD
北大核心
2014年第2期182-186,共5页
Journal of Sichuan University (Engineering Science Edition)
基金
国家水污染控制与治理重大专项资助项目(2012ZX07101-005)
江苏省博士后基金资助项目(1102040C)
东南大学博士后基金资助项目
关键词
厌氧处理
大深径比
厌氧生物滤池
生活污水
anaerobic treatment
large height-diameter ratio
anaerobic filter
domestic wastewater
