KEShui-zhou,LIShu-ping,MAJing-wei,et al.Three-dimensional Electrolysis-A/O-Ozone Process for Treatment of the Leachate in the Later Stage of Landfill[J].China Water & Wastewater,2023,39(23):1-7.
Three-dimensional Electrolysis-A/O-Ozone Process for Treatment of the Leachate in the Later Stage of Landfill
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第23期
Page:
1-7
Column:
Date of publication:
2023-12-01
- Keywords:
- leachate in the later stage of landfill; three-dimensional electrolysis; A/O; ozone catalytic oxidation; full quantitative processing
- Abstract:
- Aiming at the problems of high ammonia nitrogen concentration, poor biodegradability, carbon-nitrogen ratio imbalance, and difficulty in biological treatment of leachate in the later stage of domestic waste landfill and after the landfill closure, a combined process of the three-dimensional electrolysis, A/O and ozonation was employed to treat the leachate in the later stage of a landfill. Through the continuous operation and commissioning of the combined process system and the adjustment of related process parameters, the stable performance and effluent quality were achieved. The optimal operating parameters were as follow: continuous inlet flow of 3 L/h, pH of 8-9, the electrolysis time of 16 h, the current intensity of 25 A, the residence time of nitrification and denitrification of 16 h, the reflux ratio of nitrification liquid of 200%, the carbon to nitrogen ratio (COD∶TN) of 9∶1 by adding glucose as carbon source, the ozone concentration at the ozone generator outlet of 56 mg/L (gaseous), and the gas intake rate of the ozone catalytic oxidation section of 3 L/min. The removal rate of COD, NH3-N, TN, and TP was 96.41%, 99.91%, 98.68% and 98.18%, respectively. The effluent quality met the requirements of Standard for Pollution Control on the Landfill Site of Municipal Solid Waste (GB 16889-2008), and the operating cost of the system was 6.51 yuan/m3.
Last Update:
2023-12-01