urban municipal waste comprehensive treatment plant; landfill leachate; total font-size: 10pt; quantitative treatment" style="text-decoration-line: none; color: rgb(48, 89, 220);">">quantitative treatment; MBR; DTRO

According to the water quality characteristics of leachate from a municipal waste comprehensive treatment plant in northern China, a combination process of medium temperature anaerobic-MBR (including first-stage A/O nitrification and denitrification)-disc-tube reverse osmosis (DTRO) process was adopted to treat the leachate. The concentrate of DTRO was treated by combination process of disc-tube nanofiltration (DTNF)+high-pressure disc-tube reverse osmosis (HPRO)+mechanical vapor recompression (MVR). This realized the total quantitative treatment of leachate. The design treatment capacity of the process was 150 m ³ /d. The process flow, the composition of the process and the design parameters of the main treatment units were introduced. The results of project operation showed that the process ran steadily and had a good treatment performance. The effluent quality reached the standard of urban greening and vehicle flushing in The Reuse of Urban Recycling Water—Water Quality Standard for Urban Miscellaneous Water Consumption (GB/T 18920-2002) and the boiler replenishment water and process and product water in The Reuse of Urban Recycling Water—Water Quality Standard for Industrial Uses (GB/T 19923-2005).