污泥脱水性能指标的比较分析  

Comparative investigation of parameters for determining the dewaterability of activated sludge

作　　者：方静雨[1] 马增益[1] 严建华[1] 叶芬霞[1] 

机构地区：[1]浙江大学能源清洁利用国家重点实验室,浙江杭州310027

出　　处：《能源工程》2011年第4期51-53,62,共4页Energy Engineering

摘　　要：研究了评价污泥脱水性能的4个指标:毛细吸水时间(CST)、污泥比阻(SRF)、结合水(BW)、含固率(DS)之间的相关性,发现DS与标准化CST、SRF、BW显著相关。标准化CST与SRF极显著相关,与BW的相关性较弱,SRF与BW的相关性更弱。研究结果表明,在衡量污泥的脱水性能时没必要同时测定CST和SRF,CST测定简单,重现性好,是衡量污泥脱水性能的较好指标,但同时,也应当与衡量污泥脱水程度的指标,如含固率等,一起综合考虑污泥的脱水性能。Four parameters evaluating dewaterability of sludge,i.e.capillary suction time（CST）,specific resistance to filtration（SRF）,bound water（BW） content and dry solids（DS） content in centrifuged sludge cake of the different sludge flocs from seven full-scale wastewater treatment plants,were compared.The DS content correlated with the normalized CST、SRF、BW.The normalized CST was significantly correlated with SRF,and correlated with the BW.However,SRF correlated very weakly with the BW.It is not necessary to use both CST and SRF at the same time to estimate the sludge dewaterability.The normalized CST is feasible due to its inexpensiveness,the simple equipment and measurement procedure.But another parameter indicating the dewatering extent,such as DS content in sludge cake,should be applied together to evaluate the dewatering efficiency of the activated sludge.

关 键 词：活性污泥 脱水性能 结合水 毛细吸水时间 污泥比阻 含固率 

分 类 号：X703[环境科学与工程—环境工程]