Effectiveness of Small-size Activated Bio-filter on Purification of Domestic Sewage / 环境与健康杂志

ABSTRACT

ve To research an effective, economic and simple biological treatment technology process for purification of sewage. Methods With the sufficient supplication of oxygen, the organic compounds in domestic sewage were sufficiently oxidized and decomposed in bio-filter using activated pottery granule as packing materials. CODCr and BOD5 reflecting the effectiveness of purification of sewage were determined. Results After the treatment by activated bio-filter, the levels of CODc, of treated sewage decreased from 444.86 mg/L to 16.76 mg/L with a de-crease rate of 96.23% , the levels of BOD, decreased from 211.54 mg/L to 3.95 mg/L with a decrease rate of 98. 13% . The levels of CODCr and BOD5 of treated sewage all were below the related values of grade I standand of discharge from secondary municipal sewage treatment plant. Conclusion The purification technology using activated bio-filter was effective, economic and simple, which could be widely applied to demestic sewage purification treatment.