中水回用系统的生物脱臭试验

采样自行设计、构建的生物脱臭塔对生活污水回用处理系统产生的臭气进行净化,获得良好的效果,在空塔停留时间为92s时2个脱臭塔对氨和硫化氢的净化率均达到80%以上,投加活性污泥的1号塔的净化效果更好,表明接种污泥能够促进臭气的净化,其排气中氨含量已优于厂界一级标准,臭气强度接近无臭水平,沸石吸附及微生物氧化分解可能是其中主要过程机理。脱臭塔净化后排气中硫化氢含量仍然较高,达到稍可感觉出和易感觉的水平,表明脱臭塔对硫化氢的净化作用有待进一步提高。氮氧化物因为进气浓度很低,故净化率仅为37%～51%。

EXPERIMENTAL STUDY ON DEODORIZATION OF WASTEGAS FROM SEWAGE REUSE SYSTEM BY BIOFILTER TOWERS

Experimental results of deodorization of wastegas from sewage reuse system by biofilter towers had been introduced in this paper.Within 92 seconds,these two biofilter towers could remove more than 80% NH_3 and H_2S.No.1 tower inoculated with activated sludge could purify the wastegas to almost non-odorous extent,which may be attributed to zeolite adsorption and biological degradation.Only 37%～51% NO_x could be removed by biofilter towers, which meant enhanced purification methods should be required.