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垃圾填埋场渗滤液水质复杂,危害性大,对其无害化处理尚未得到很好解决。研究发现,垃圾渗滤液中有机污染物可标识划分为亲水性和疏水性两大类物质。实验针对性采用亲水的天然膨润土处理亲水性有机物,疏水的有机膨润土处理疏水性有机物,再结合鸟粪石结晶法去除氨氮,从而获得一套处理中晚期垃圾渗滤液的经济高效的矿物法组合处理技术。采用GC-MS技术鉴定经矿物法处理后的垃圾渗滤液,亲水性和疏水性有机污染物的种类和含量都明显降低。检测进水与出水的COD、氨氮及重金属浓度这三项关键指标,垃圾渗滤液原液COD为2566 mg/L,氨氮3859 mg/L,重金属Hg为0.305 mg/L。矿物法组合处理后出水的COD为245mg/L,氨氮48 mg/L,重金属Hg未检出。矿物组合法为垃圾渗滤液的无害化处理提供了一条新的思路。
Landfill leachate water quality is complex and harmful, its harmless treatment has not been well resolved. The study found that organic pollutants in landfill leachate can be divided into two categories of substances: hydrophilic and hydrophobic. The experiment focused on the use of hydrophilic natural bentonite treatment of hydrophilic organic matter, hydrophobic organic bentonite treatment of hydrophobic organic matter, combined with struvite crystallization method to remove ammonia, to obtain a set of landfill leachate treatment of cost-effective mineral method Combination processing technology. Using GC-MS to identify landfill leachate treated by mineral method, the types and contents of hydrophilic and hydrophobic organic pollutants are significantly reduced. The COD, ammonia nitrogen and heavy metal concentration of the influent and effluent were measured. The COD of the leachate liquid was 2566 mg / L, the ammonia nitrogen was 3859 mg / L and the heavy metal Hg was 0.305 mg / L. The combined treatment of mineral law of the effluent COD 245mg / L, ammonia nitrogen 48 mg / L, heavy metal Hg was not detected. Mineral combination method for the landfill leachate harmless treatment provides a new idea.