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).
出处
《中国给水排水》
CAS
CSCD
北大核心
2005年第2期40-43,共4页
China Water & Wastewater
关键词
自来水厂排泥水
静沉
斜板浓缩池
sludge water from water works
static settling
inclined plane thickener
