内循环三相生物流化床处理生活污水

Domestic wastewater treatment using an inner loop three phase fluidized bed reactor.

对内循环三相生物流化床处理生活污水进行了中试研究，探讨了生物膜的形成和水力停留时间及供气量对处理效果的影响．结果表明：在气水比４：１、水力停留时间４０ｍｉｎ、进水ＣＯＤ１５０～１０００ｍｇ／Ｌ条件下，平均ＣＯＤ去除率为８９％、平均去除容积负荷为１０．４ｋｇＣＯＤ／ｍ３·ｄ，氧利用率为１３％．

A pilot scale experiment on the domestic wastewater treatment using an inner loop three phase fluidized bed reactor was presented in this paper. The formation of bio film and effects of hydraulic retention time and volumetric gas rate on efficiency of wastewater treatment were studied. The results showed that the average COD removal rate , COD volumetric load and oxygen utilization rate were 89%,10.4 kg COD/m 3·d and 13% respectively under the conditions of air/wastewater ratio 4:1, HRT 40 min and the influent COD concentration of 150～ 1000mg/L.