Dynamic experimental study on leachate treatment by process integration

In view of the actual processing conditions of leachate treatment of the Inner Mongolia´s municipal solid wastes plant, the paper studies new leachate treatment process integration, in order to reduce cost, improve leachate´s overall biodegradability, remove high concentration organic contaminants and ammonia-N. The experiment device of the process integration include: electro-coagulation + H₂O₂ process, plain sedimentation process, activated sludge process and catalytic electrolysis process, and the COD and NH₃-N concentration of the effluent of plain sedimentation and catalytic electrolysis at different times are monitored. According to the dynamic experiments, it was concluded that the designed process integration is feasible to treat the leachate of the Inner Mongolia´s municipal solid wastes plant. The COD and NH₃-N concentration of the effluent of the process integration is 30mg/L, 25mg/L respectively, under the concentration limit of the Solid Waste Landfill Pollution Control Standard. The total operating cost of the process integration was 5.531 yuan/t, including energy consumption, iron consumption, pharmacy dosing expenses, electrode fee was not included.