老港填埋场渗滤液性质随工艺变化研究

经老港填埋场渗滤液处理系统的各处理单元处理后的流出液，用不同孔径的系列膜进行了梯度分离。分离前后的渗滤液进行了TOC、TP、TN、氨氮和可溶性P等参数的测定，并建立了各参数与不同孔径膜的关系。结果表明，此工艺对老港填埋场渗滤液的处理具有一定的功效；随着处理工艺的进行，渗滤液的组成发生了较大的改变，其中细胶体部分的百分含量增加，而可溶性部分降低；渗滤液的绝大部分污染物质集中于可溶性部分，而渗滤液中的P主要与大分子的悬浮物和粗胶体结合。

Chemical composition change in leachate with the treatment process from Laogang Landfill

Leachate samples were collected from effluents generated in various treatment units used at Laogang Landfill at March, 2003, where anaerobic, anoxic and aerobic processes were sequentially used, and these leachate samples were gradiently separated by a series of membranes with various porosities. Meanwhile, the parameters, such as TOC, TP, TN, NH3-N, orthophosphate,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. It is found that the treatment process in Laogang Landfill seems to be effective in some degree to the removal of the pollutants in leachate,and the elemental distribution in leachate is also analysed. The leachate composition of TOC distribution in different terms changed with the treatment process, among which the percentage of TOC in fine colloids fraction increases and that in dissolved fraction decreases,as the leachate is treated by the treatment unites, possibly due to the hydrolysis of macromolecules into middleand micro-molecules. It is predicated that dissolved fraction predominates in leachate,and the phenomenon that the P in leachate is combined with the suspended particle and the coarse colloids was also found.