摘要
随着城市的发展,环保要求日益严格,排水管渠清淤污泥的出路问题逐渐引起管理部门的重视,也成为城市面临的难题。对我国多个管渠污泥处理站进行调研,并分析其采用的工艺及存在的问题。在此基础上,以武汉市某管渠污泥处理站为例,结合项目自身特点,采用对下游污水处理厂影响较小的“预处理+多级分离+机械脱水”联合处理工艺。处理后共产生4种渣料,分别为粒径≥100.0 mm的砖块、石头、树根、塑料等;粒径为3.0~<100.0 mm的石块、塑料、浮渣等,含水率为11.4%;粒径为0.2~<3.0 mm的砂、有机物等,含水率为21.8%;粒径<0.2 mm的粉砂,含水率为25.7%。按满负荷运行进行测算,单位运行成本为75.53元/t。同时,总结了运行以来存在的问题,以期为后续排水管渠污泥处理项目提供借鉴。
With the development of the city,environmental protection requirements are increasingly strict,and the problem of sewer sludge outlet has gradually attracted the attention of the management department,and has also become a problem faced by the city.A number of sewage sludge treatment stations in China were investigated and their processes and existing problems were analyzed.On this basis,a sewage sludge treatment station in Wuhan was taken as an example,and combined with the characteristics of the project,the combined treatment process of“pretreatment+multistage separation+mechanical dehydration”,which has little influence on the downstream sewage treatment plant,was adopted.After treated,four types of residues were generated:bricks,stones,tree roots,plastics,etc.,with a particle size greater than 100.0 mm;stones,plastics,scum,etc.,with a particle size between 3.0 and 100.0 mm(not including 100.0 mm)and a moisture content of 11.4%;sand,organic matter,etc.,with a particle size between 0.2 and 3.0 mm(not including 3.0 mm)and a moisture content of 21.8%;and silt with a particle size smaller than 0.2 mm and a moisture content of 25.7%.The unit operation cost in the station was 75.53 yuan/t according to the calculation of full load operation.At the same time,the problems existed since the operation were summarized in order to provide reference for the subsequent sewage sludge treatment projects.
作者
孙亚全
杨雯
吴琼
杨潞
SUN Yaquan;YANG Wen;WU Qiong;YANG Lu(Central and Southern China Municipal Engineering Design&Research Institute Co.Ltd.,Wuhan Hubei 430010)
出处
《环境卫生工程》
2025年第2期38-41,共4页
Environmental Sanitation Engineering
关键词
排水管渠污泥
多级分离
机械脱水
sewer sludge
multistage separation
mechanical dehydration
