ZHANGYan-min,LIQiang,JINZhi-guo,et al.Optimization and Application of the Leachate Treatment Process in Xiaping Aging Landfill in Shenzhen[J].China Water & Wastewater,2023,39(4):75-80.
Optimization and Application of the Leachate Treatment Process in Xiaping Aging Landfill in Shenzhen
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第4期
Page:
75-80
Column:
Date of publication:
2023-02-17
- Keywords:
- aging; landfill leachate; two-stage submerged combustion evaporation; fully quantified treatment
- Abstract:
- The design scale of a fully quantified emergency project for the treatment of leachate from Xiaping aging landfill in Shenzhen is 1 200 m3/d, and the main treatment process consists of equalization tank, two-stage AO, MBR, NF and RO. Owing to the high total nitrogen in raw water, the leachate treatment process was optimized by strategies such as low energy consumption technology for enhancement of MBR denitrification, innovative combination of membrane advanced treatment system, reduction of concentrate, and adoption of fully quantified treatment technology. In the design, the MBR system was optimized and modified by measures such as prolonging hydraulic retention time, increasing nitrification liquid reflux ratio and adopting deep water aeration approach (height of 10 m) and built-in ultrafiltration. The nanofiltration concentrate was reduced and the overall recovery rate of the nanofiltration system reached 95%. A two-stage submerged combustion evaporation process was employed for the treatment of the RO concentrate. The overall system ran well and the effluent quality stably met the discharge standard. The goal of intensive layout and energy saving was realized, and the treatment of landfill leachate was fully quantified.
Last Update:
2023-02-17