MAP法预处理高氨氮垃圾渗滤液的试验研究

采用磷酸铵镁沉淀法(MAP法)去除老龄垃圾渗滤液中的氨氮。试验结果表明,在pH值为8.25,Mg、N、P的量比为1.3∶1∶0.8,反应时间为2h,搅拌速度为200r/min,沉淀时间为30min的条件下,对氨氮、COD的质量浓度分别为1515、3295mg/L的垃圾渗滤液,氨氮的去除率达到91.2%,COD的去除率为26%,为后续生化处理创造了条件。

Experimental research on treatment of landfill leachate containing high concentration of ammonia-nitrogen by MAP process

Magnesium ammonium phosphate(MAP) sedimentation process was used to remove ammonia nitrogen from aged landfill leachate, the results of the test showed that, for the landfill leachate with mas concentration of ammonia-nitrogen and COD of 1 515 and 3 295 mg / L respectively, the removal rates of ammonia nitrogen and COD reached 91.2% and 26% respectively under the condition that, the pH value was 8.25, the mas ratio of Mg, N and P was 1.3 ∶ 1 ∶ 0.8, the reaction time was 2 h, the stirring velocity was 200 r / min, th sedimentation time was 30 min, which provided the foundation for the further biochemical treatment.