不同预处理方法对污泥脱水性能的影响  

Effects of different pretreatment methods on sludge dewatering performance

作　　者：苑宏英[1,2] 王亭[1,2] 祁丽[1,2] 牛四芳[1,2] 

机构地区：[1]天津城建大学环境与市政工程学院,天津300384 [2]天津城建大学天津市水质科学与技术重点实验室,天津300384

出　　处：《环境工程学报》2015年第8期4015-4020,共6页Chinese Journal of Environmental Engineering

基　　金：天津市科技计划项目(13ZCZDGX03100);天津市滨海新区科技计划项目(2011-BH14003)

摘　　要：污泥脱水是污泥处理的关键步骤,本文以污泥比阻(SRF)为考察指标,对比分析了污泥经单独酸碱调节、酸碱联合调节、水浴加热、自然冻融以及氧化剂Fenton等预处理方法调节后污泥的脱水效果。结果表明,污泥经氧化剂Fenton试剂处理后,SRF明显减小,污泥脱水性能得到改善;先酸后碱调节的方式比单独酸、碱调节更利于污泥脱水;温度调节对污泥的比阻有影响,低温条件下污泥的比阻较小。Sludge dewatering is the key step in sludge treatment. Sludge was treated under different reac- tion conditions namely separate acid-base regulation, acid and alkali combination adjustment, heating in a water bath, natural freezing and thawing, oxidated by Fenton＇ s reagent, in order to analyze the effect of different pre- treatment methods on the dewatering characteristics of the sludge. The efficiency of the treatment was evaluated on the base of specific resistance to filtration （SRF）. Results show that the Fenton＇ s peroxidation positively de- crease the SRF of sludge and hence enhances the mechanical dewaterability of the sludge. From acidity to alka- linity adjustment is more conductive to sludge dewatering than separate acld-base adjustment. Temperature had effect on the SRF of sludge and the SRF was small through the freezing and thawing treatment.

关 键 词：污泥比阻 酸碱调节 水浴加热 自然冻融 FENTON试剂 

分 类 号：X705[环境科学与工程—环境工程]