造纸污泥蚯蚓生物处理效应研究

The study of earthworm biological treatment on paper sludge

造纸污泥产生量大,含水量高,现行的堆存方式占地广,环境污染严重,堆场存在安全隐患。蚯蚓生物处理具有成本低、效率高,二次污染少等特点,试验采用不同密度处理,研究蚯蚓增殖量、污泥养分变化趋势、重金属污染状况等.研究结果表明:蚯蚓生物处理的适宜密度为蚯蚓和污泥比为1:8和1:10。经过30天处理后,污泥中的蚯蚓增重最高为22.5 g,增殖最高达到23条;经过蚯蚓处理的污泥,有机质强烈分解,分解率最高可达26.2%,相应地,全N、全P、全K含量增加,但增加的幅度较小,一般不超过1mg/kg;同时,蚯蚓能富积污泥中的重金属,处理后污泥中Zn和Cu的去除率平均为19.6%和39.7%。

As large amount of paper sludge being produced, it is always buried in landfill, and results in a series of problems such as environment pollution and security of landfill, etc. The characteristic of earthworm biological treatment is low cost, high efficiency, and less pollution, etc. We study on the change of earthworm quantity, not more than 1 mg/kg; earthworm has the enrichment ability of heavy mental, the mean value removal of Zn and Cu in sludge is 19.6% and 39.7% respectively.