长沙某焚烧厂渗滤液处理设计案例

Design Case of Leachate Treatment in a Municipal Solid Waste Incineration Plant in Changsha

长沙某垃圾焚烧厂渗滤液水量约1800 m3/d,COD约60000 mg/L、氨氮约2000 mg/L、总氮约2500 mg/L、SS约10000 mg/L。出水要求满足《城市污水再生利用工业用水水质》(GB/T19923-2005)规定的敞开式循环水系统补充水水质标准,设计采用"预处理+厌氧反应器(UASB)+外置式MBR膜生化反应器+纳滤(NF)+反渗透(RO)"工艺,并对NF及RO浓缩液分别单独处理,最终做到"近零排放"。

The amount of leachate wastewater from a municipal solid waste incineration plant in Changsha is about 1800 m3/d, COD is about 60000 mg/L, ammonia nitrogen is about 2000 mg/L, total nitrogen is about 2500 mg/L, ss is about 10000 mg/L. The effluent requirements meet the water quality standards of the open circulating water system specified in reuse of urban recycling water-water quality standard for industrial uses(GB/T 19923-2005). The designed process is "pretreatment+anaerobic reactor(UASB)+external MBR membrane biochemical reactor+nanofiltration(NF)+reverse osmosis(RO)", and NF and RO concentrated solutions were treated separately to achieve "near zero emission".