一种沉淀法处理生活垃圾渗滤液的研究

生活垃圾渗滤液来源于生活垃圾的含水和地表径流和地下水的浸入。渗滤液是一种高浓度的有机废水。与工业废物一起填埋的垃圾渗滤液中还含有较多的重金属，垃圾浸滤液一旦控制不当，将会污染地下水，甚至对人体健康造成危害。目前研究垃圾浸滤液的方法已经成为水处理研究的热点，但研究生活垃圾浸出液中氨氮的去除比较少。本文首先介绍研究磷酸铵镁沉淀去除氨氮的原理，接下来讨论了磷酸铵镁沉淀法去除垃圾渗滤液中的氨氮的各种因素，分析了各种最佳条件的形成。在去除氨氮同时，对重金属也有很好的去除效果。磷酸铵镁沉淀法去除氨氮同时形成的是一种重要复合肥料。MAP法可降低垃圾渗滤液中COD浓度，改善其可生化性，并具有对NH3-N去除率高，无二次污染，受温度影响很小等特点。

A Study About Municipal Domestic Leachate Used MAP

Municipal Domestic Refuse Leachate comprise of the water from the domestic garbage, surface run - off and groundwater ingression. Landfill leachate is a kind of high - concentrate organic wastewater. The leachate of landfill which contains industrial waste landfill also contains more heavy metals, The leachate will cause serious groundwater pollution if discharged without applicable treatment, which may cause harmful to human health. How to deal with the leachate has become a hot spot in the research of wastewater treatment, but there is rarely research about how to remove ammonia - nitrogen contained in the Municipal Domestic Refuse Leachate. Firstly this paper summarized the removal theory of Ammonium Magnesium Phosphate precipitate with ammonia - nitrogen, and then discussed the factors influencing the precipitation, lastly analysed how to engender optimum conditions. The process also has a good effect of removing heavy metals. Ammonium Magnesium Phosphate precipitates with ammonia - nitrogen and come into a important complex fertilizer. MAP method can reduce the concentration of COD in landfill leachate, to improve its biodegradability, and has the high removal rate of NH3 - N, without secondary pollution, the temperature has little effect and so on.