Feasibility of the AF/Aerobic Contact Reactor/Sand Filter System for Reuse Treatment of Domestic Sewage
This paper is concerned with the alternative proposed here in order to treat domestic sewage from residential district for reuse in a combined system composed of an anaerobic filter (AF) -aerobic contact reactor following by sand filter. The AF reactor, investigated in present study, represented an efficient pre-treatment process for domestic sewage at -4-25. Average COD removal efficiency accounted to 60％, 61％, 57％, 69％, 61％, and 47％ at an HRT of 6.7h, 4.4h, 3.5h, 2.9h, 2.1h, and 1.3h, respectively. Average SS removal efficiency amount to 77％, 85％, 82％, 87％, 83％, and 56％ at an HRT of 6.7h, 4.4h, 3.5h, 2.9h, 2.1h, and 1.3h, respectively. For the pre-treatment of domestic sewage at low temperatures, the application of an AF reactor at an HRT of 3h was recommended. The COD loading rate of the AF reactor should be 1.0~6.0kgCOD/ (m3·d). In the aerobic contact reactor, average COD and SS removal efficiency amount were 62％ and 30％ respectively. The average COD and SS of the effluent 58mg/L and 50mg/L respectively. For the post-treatment of domestic sewage at low temperatures, the application of an aerobic contact reactor at an HRT of 3h was recommended. The refinery treatment by filtration with double layer media filter was very effective in SS removal. The value of the effluent for reuse in non-potable was constantly satisfied, that is, effluent COD and SS 50mg/L and 10mg/L respectively. The results also indicate that such combined anaerobic - aerobic -filtration competes favorable with conventional aerobic system in two essential cost features: energy consumption and excess sludge production.
Domestic Sewage Reuse anaerobic filter Aerobic Contact Reactor Sand Filter
YUE Xiu-ping GUO Yu-qi
School of Environmental Engineering and Science Taiyuan University of Technology Taiyuan, China
国际会议
上海
英文
3300-3303
2008-05-16（万方平台首次上网日期，不代表论文的发表时间）