矿化垃圾处理前后渗沥液组成研究

Chemical Composition Change in Leachate with the Treatment by Aged Refuse Biofilter

用不同孔径系列膜对老港填埋场调节池渗沥液进行梯度分离,对分离前后的渗沥液测定了COD、TOC、UV254等参数,并建立了各参数与不同孔径膜的关系。同时运用矿化垃圾反应床进行处理,对处理前后渗沥液的组分变化进行测定。结果表明:渗沥液的绝大部分污染物质集中于可溶性部分,而经矿化垃圾生物反应床处理后渗沥液,分子质量小于1 000 u的溶解性有机物的含量最高,在90%以上,胶体类与不溶性有机物含量较低,在10%左右。

Leachate samples were collected from the holding tank used in Laogang Landfill,and the leachate samples were gradiently separated by a series of membranes with various porosities. Meanwhile,the parameters,such as COD,TOC,UV254 in the filtrates resulted from gradient filtration of the effluents were determined,and the relationships between these parameters and the membrane porosity sizes were quantitatively co-related. The components of leachate were determined before and after the treatment of aged refuse bilfilter. Results showed that most contaminants in the leachate focused on the soluble part and the organic matter,which molecular weight is less than 1 000 u,showed the highest proportions,up to 90%. But the contents of colloids and other undissolved matters were as low as 10%.