摘要
我国现有的大部分城镇污水处理厂采用活性污泥法工艺 ,经二级生物处理后 ,进水中有机污染物主要转化成为污泥物质 ,其BOD数量远超过出水排放的BOD数量。污水处理厂大量外排污泥势必对受纳环境产生不利影响 ,其程度取决于污泥的无害化或资源化处理和处置方式。污泥如果直接溢入水体或向环境排放 ,势必对环境造成比出水排放更为严重的污染。因此 ,对城镇污水处理厂污泥进行无害化处理已成为规范我国城镇污水处理厂处理功能的重要环节。
Activated sludge processes are adopted in most municipal wastewater treatment plants (MWTP) in this country. Through the secondary treatment, most organic pollutants in raw wastewater transfer into excess sludge, and the sludge discharge quantity (as BOD) will be much higher than that in the effluent. The sludge discharge will make impact to the receiving environmental body with certain harmness depending on the innocent treatment of the sludge. Direct sludge discharge into water body or natural environment without any treatment will cause more serious damage than wastewater discharge does. So sludge innocent treatment has to be absolutely necessary to normalize the MWTP in this country.
出处
《给水排水》
CSCD
北大核心
2002年第9期25-26,共2页
Water & Wastewater Engineering
