【作者】 罗茜；

【导师】 牛盾；

【作者基本信息】 东北大学 ， 应用化学， 2008， 硕士

【摘要】 渗滤液是指垃圾在堆放和填埋过程中由于垃圾中有机物质分解产生的水和垃圾中的水分、降雨以及入渗的地下水,通过淋溶、冲刷作用形成的污水。我国垃圾渗滤液水质复杂,有机物浓度高,氨氮含量高,水质水量在现场多方面的因素下波动很大,易对地下水环境和地表水环境产生严重的污染。国外的处理工艺难以借鉴,国内尚无十分成熟和完善的处理渗滤液的工艺。课题对中国城市垃圾渗滤液的产生和来源,组成和特点,危害和排放标准进行了分析,介绍了当前我国垃圾渗滤液处理的现状及存在的问题,研究了目前国内外的基本处理技术,确定采用组合工艺处理垃圾渗滤液,即前处理——生化处理——深度处理三级处理方法。组合工艺前处理采用混凝／气浮技术,生化处理采用BCS生物处理即改进SBR技术,深度处理采用超滤和反渗透膜技术。BCS生物处理技术是基于对SBR工艺投加了具有氨吸附性能的填料而形成的针对高浓度废水的一种改进处理技术,对氨氮去除率达99%。FIL-MAX膜使用平板式超滤膜,预处理要求低,透过率高,防止各种污染物堵塞,易于清洗。试验结果表明,组合工艺对COD和NH4-N有较好的去除效果。组合工艺最终出水COD的范围是0～100mg/L,均值为18mg/L, NH4-N的范围是0～0.66mg/L,均值为0.23mg/L,这两项指标远远优于《生活垃圾填埋污染控制标准》(GBI6889-1997)的一级标准。更多还原

【Abstract】 Landfill leachate form the sewage as a result of water in decomposition of organic matter in waste water and water in garbage, rainfall and infiltration of groundwater by leaching, eroding in the the process of garbage dumps and landfill. At home landfill leachate water is complex, there are high concentrations organic matter and it’s ammonia content is high. Quality and quantity fluctuate at the scene of many factors, have a serious environmental pollution to groundwater and surface water environment. The waste treatment process in foreign countries is difficult to be used for reference, there is no mature and perfect treatment of the landfill leachate at present at home.Generation and source, compenent and characteristic, harm and emission standards of urban landfill leachate in China were analyzed, current leachate treatment and the status of the existing problems in China were introduced, current domestic and international basic processing technology were studie, didentify a combination treatment, that is, pre-treatment-biological and chemical treatment-deep treatment three steps treatment.In this combination treatment study, pre-treatment adopt flocculation/flotation technology, biochemical treatment adopt BCS biological treatment, that is improve SBR technology, deep treatment adopt ultrafiltration membrane and reverse osmosis technology. BCS biological treatment technology is an improved treatment technology for high concentration wastewater based on increasing the absorption of ammonia to SBR process with the packing, the ammonia nitrogen removal rate reached 99%. FIL-MAX film is flat ultrafiltration membrane, pretreatment of low demand, high-transmission, prevention of various pollutants plug, easy to clean. Operation results show that the combination had better removal according to COD and NH4-N. The final effluent of the combination treatment:the scope of COD is 0～100 mg/L, mean 18 mg/L, the scope of NH4-N is 0-0.66mg/L, mean0.23 mg/L, this two indicators can satisfy the class-Ⅰstandards for the Pollution Control on the Landfill Site for Domestic Waste (GB16889-1997)更多还原