自来水厂排泥水的静沉及浓缩试验研究  

Study on Static Settling and Thickening of Sludge Water from Water Works

作　　者：陈静[1] 陈士才[1] 许建华[1] 王劲[2] 洪觉民[2] 

机构地区：[1]同济大学环境科学与工程学院,上海200092 [2]杭州市自来水总公司,浙江杭州310016

出　　处：《中国给水排水》2005年第2期40-43,共4页China Water & Wastewater

摘　　要：　对自来水厂排泥水分别进行了静沉和动态浓缩试验,以便为高效斜板浓缩池的设计和运行提供依据和指导。结果表明,慢速搅拌可显著提高泥水的静态沉降速度;对于含固率 >0. 2%的排泥水,当固体负荷为 3. 2~3. 4kg/(m2·h)时经浓缩后底泥的含固率 >2. 6%;当浓缩池进泥含固率<0. 17%时浓缩效率会明显降低,要达到 2%的出泥含固率则固体负荷需降到 1. 9kg/(m2·h)以下。斜板浓缩池在以固体负荷为设计参数的同时,还应采用水力负荷来校核,以保证上清液的水质达到排放标准,如要求上清液SS<70mg/L,则水力负荷应控制在 3. 7m3 /(m2·h)以下。Experiment was carried out on the static settling and thickening of sludge water from water works, so as to provide basis and direction for the design of inclined plane thickener. The result shows that slow stirring can raise the static settling velocity. For the sludge water with solid content more than 0.2%, the solid content of thickened bottom sludge can be up to 2.6% at solid loading of 3.2-(3.4) kg/(m^2·h). When the solid content of feeding sludge in thickener is less than 0.17%, thickening efficiency will be reduced significantly. If the solid content of sludge out of thickener is desired to be 2%, solid loading must be lowered to 1.9 kg/(m^2·h). When the solid loading is taken as the design parameter for inclined plane thickener, it shall be checked by hydraulic loading, to ensure the quality of supernatant up to discharge standard. If the supernatant SS is required to be less than 70 mg/L, hydraulic loading shall be controlled at lower than 3.7 m^3/(m^2·h).

关 键 词：自来水厂排泥水 静沉 斜板浓缩池 

分 类 号：TU991.2[建筑科学—市政工程]