农村生活垃圾生物稳定预处理对渗滤液产生及污染潜力的影响

Effect of Biostabilization on the Pollution of Municipal Solid Waste

为从源头控制垃圾填埋场渗滤液污染,以广州市番禺区猛涌村生活垃圾处理示范基地为研究对象,以猛涌村中转站分选得到的有机垃圾为试验材料,采用生物稳定和淋溶试验研究方法,以未经生物稳定处理的垃圾淋溶试验模拟渗滤液产生为对照(CK),以生物稳定预处理36d的垃圾淋溶试验模拟渗滤液产生为处理1(T1),以生物稳定预处理12d的垃圾淋溶试验模拟渗滤液产生为处理2(T2)。通过分析渗滤液pH、氨氮、总磷、COD、水溶性碳等指标的变化,考察生物预处理方法对渗滤液的污染控制效果。结果表明,在10d淋溶试验过程中,T1、T2渗滤液产量比CK分别减少33、28;CK渗滤液pH一直呈酸性,而T1、T2介于在7.0～8.5;T1、T2渗滤液氨氮、总磷、COD、水溶性碳平均浓度分别比CK降低77、63,75、69,73、66,74、69,明显降低了垃圾的污染潜力,垃圾生物稳定程度越高,污染潜力越低。研究成果从生态控制的角度为垃圾填埋场渗滤液污染防治提供了理论依据。

In order to reduce the leachate production by land-filling,this study focused on the biostabilization treatment of municipal solid waste（MSW）,which was separated from Mengchong municipal solid waste transfer station in Guangzhou.Three treatments were carried out by exactration test：（1）Control（CK）,simulated leachate with unbiostabilization MSW;（2）Treatment 1（T1）,simulated leachate with MSW after 36 days＇biostabilization;（3）Treatment 2（T2）,simulated leachate with MSW after 12 days＇biostabilization.Samples were taken and indexes of leachate were analyzed during the process of simulation which lasted 10 days.The results showed that the leachate generation of T1 was reduced by 33%,and the NH4＋-N,TP,COD,WSC was reduced by 77%,75%,73%,74% respectively,compared with control,as well as the reduction by 28%,63%,69%,66%,69% for T2;The pH value of CK was lower than 7.0,but the pH value of T1 and T2 were both in the range of 7～8.5.The results suggested that the leachate pollution of MSW was significantly reduced by biostabilization,intenser biostabilization,lower leachate pollution,which was important to the control of leachate in MSW landfilling.