摘要
采用两段式膜生物反应器作为原生动物哺育系统 ,培养富含原生动物的污泥 ,然后将其定期接种于普通活性污泥中 ,利用原生动物对细菌的捕食原理 ,达到削减剩余污泥量的目的。污泥削减试验中采用了半连续流普通活性污泥系统 ,通过对比试验 ,发现接种原生动物以后 ,污泥产率由 0 .0 2kg泥 /kgCOD减小至 - 0 .4 7kg泥 /kgCOD ,同时污泥絮凝沉降性能得到改善 ,系统的COD去除率、硝化率得到提高 。
In this study, two-stage membrane bioreactor (TMBR) was used to produce bio-sludge rich in protozoa. The bio-sludge was then introduced into conventional activated sludge each day to study the efficiency of reducing excess sludge via bacteria predation by protozoa. In order to find out the difference due to inoculation, comparative tests using semi-continuous activated sludge system were carried out under the same condition. The net biomass yield in test reactor reduced from 0.02 kg sludge/ kgCOD removal to -0.47 kg sludge/kgCOD removal as compared with that in control reactor which was not fed by protozoa rich sludge, The flocculation and sedimentation characteristics of sludge, COD removal efficiency, nitrification efficiency and SS in effluent were improved as well.
出处
《中国给水排水》
EI
CAS
CSCD
北大核心
2000年第11期6-9,共4页
China Water & Wastewater
关键词
原生动物
剩余污泥产量
削减
活性污泥法
protozoa
excess sludge production
reduce
activated sludge process
