MADong-bing,YUEZheng,DINGXi-ming,et al.Application of Two-stage AO, Built-in Ultrafiltration and Two-stage Nanofiltration Process for the Treatment of Landfill Leachate[J].China Water & Wastewater,2022,38(18):78-82.
Application of Two-stage AO, Built-in Ultrafiltration and Two-stage Nanofiltration Process for the Treatment of Landfill Leachate
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第18期
Page:
78-82
Column:
Date of publication:
2022-09-17
- Keywords:
- landfill leachate; two-stage AO; NF; concentrate
- Abstract:
- A process consisting of two-stage AO, built-in ultrafiltration and two-stage nanofiltration was designed to treat leachate from a landfill in Tianjin, and its treatment scale was 700 m3/d. A two-stage Fenton advanced oxidation process was employed to treat the primary nanofiltration concentrate, its treatment scale was 218 m3/d, and the effluent was returned to the equalization tank. The secondary nanofiltration concentrate was returned directly to the ultrafiltration outlet tank. The biochemical sludge produced by the biochemical system and the chemical sludge produced by the concentrate treatment system were dehydrated by concentration and pressure filtration to reduce the water content to 60%. The biochemical sludge dewatering filtrate was returned to the equalization tank, the chemical sludge dewatering filtrate was returned to the primary Fenton reaction tank, and the sludge cake was transported to a landfill for landfill disposal. Since the completion of the system, the effluent quality met the table 2 limit specified in Standard for Pollution Control on the Landfill Site of Municipal Solid Waste (GB 16889-2008), and the removal efficiencies of COD, NH3-N, TN and TP reached 99.3%, 99.9%, 99.0% and 92.3%, respectively. The process had a good treatment performance, stable operation and high degree of automation. The implementation of the project has solved the problem of insufficient leachate treatment capacity of the original project, and has good environmental and social benefits.
Last Update:
2022-09-17