jismart2019049: Effect Analysis of Recharge Method for Removal of NH3-N And Heavy Metal Ions of Landfill Leachate

Abstract

After the trash enters the methane production stage, NH3-N of reactor effluent which is recharged to the anaerobic landfill is removed by 60% -70%; reactor NH3-N removal rate to the aerobic landfill was 94% ~ 96% ,than non- recharge reactor NH3-N removal rate higher was 26% to 35% Concentration of liquid waste into the backfill of NH3-N removal effect is higher ; The main heavy metal ions present in the concentrate are Cu, Zn, Cr, Pb and Cd, and the removal rates of these heavy metals are more than 45%. High concentrations of NH3-N are one of the important features of landfill leachate. In the reverse osmosis - concentrated liquid backwashing process leachate treatment process, the leachate NH3-N intercepted to the concentrated solution. And the concentrate in the high concentration of NH3-N with the concentrated liquid back to the landfill pile, Therefore, it is an urgent problem to study the change of concentration of NH3-N during the recharging process and how to remove the NH3-N in the concentrate.