Effect of RO Concentrates for Recharging Landfill Pile on Leachate Water Quality in Domestic Wastes Landfill
This paper took three domestic waste landfill sites which had been temporarily closed in Dongguan City,Guangdong Province as the research object.The concentrations of major pollutants such as CODCr,BOD5,ammonia nitrogen,TN,TP,electrical conductivity and SS in the raw leachate water with a time span of 1 year were tracked,collected and analyzed.In this paper,it was found that when the concentration of concentrated liquid recharge was greater than the critical amount,the concentration of SS,BOD5 and electrical conductivity in leachate pollutants were significantly positively correlated with the square of the concentration of concentrated liquid recharge,and the critical amount of concentrated liquid recharge was also positively correlated with the amount of waste stored in landfill and the amount of leachate produced.Recharging of concentrated liquid could increase the concentration of various pollutants in landfill leachate,which had the greatest effect on electrical conductivity,followed by organic pollutants,TN,ammonia nitrogen,and finally SS and TP,among which the influence on TP is the least.Due to the recharging of landfill can cause the electrical conductivity and total dissolved solids in the leachate water quality to increase sharply and exceed the concentration limit of the influent water quality of the equipment,which can seriously affect the normal operation of the leachate treatment equipment using disc tube reverse osmosis(DTRO)as the treatment method.This paper suggests that recharge of reverse osmosis membrane concentrate into the landfill should not be the treatment method of reverse osmosis membrane concentrate.
domestic waste landfillRO concentraterecharging landfill pileleachate water qualityelectric conductivityleachate treatment
万方数据
维普
