广西城市污水处理厂污泥产生及处置现状分析

Status of sludge production and disposal in Guangxi municipal sewage treatment plants

基于2017年广西14个地级市的46座城市污水处理厂统计数据,分析了污泥产生特性和污泥处置方式。结果表明:广西城市污水处理厂2017年污泥产生总量为8.20万t/a(绝干),处置方式以直接填埋、堆肥土地利用和水泥窑协同处置为主,直接填埋量、堆肥土地利用量、水泥窑协同处置量分别占比26.98%、37.68%和35.34%;广西主要城市污水处理厂2017年平均污泥产率为4.18 t/万m 3(污泥含水率80%),污泥产率普遍偏低。针对污泥处置带来的二次污染问题,建议加强污泥处置后的跟踪评价并做好预防措施。

According to the statistical data of 46 municipal sewage treatment plants in 14 prefecture-level cities in Guangxi province in 2017,the sludge generation characteristics and disposal methods were analyzed.The results showed that the total amount of sludge produced by the Guangxi municipal sewage treatment plants in 2017 was 82,000 t/a(absolutely dry).The main methods for sludge disposal were direct landfill,compost land use and cement kiln co-combustion,which accounted for 26.98%,37.68%and 35.34%,respectively.The sludge yields of major municipal sewage treatment plants in Guangxi province were generally low in 2017 with an average value of 4.18 t/10,000 m 3(sludge moisture content=80%).In order to solve the secondary pollution caused by sludge disposal,it was recommended to strengthen the follow-up evaluation and preventive measures after sludge disposal.