PSFS工艺改造对浓缩污泥特性及脱水性能的影响  

Effect of PSFS Process Transformation on Characteristics of Thicked Sludge and Its Dewatering Performance

作　　者：张显忠[1,2] 戴晓虎 ZHANG Xian-zhong;DAI Xiao-hu(State Key Laboratory of Pollution Control and Resource Reuse,Tongji University,Shanghai 200092,China;Shanghai Urban Construction Design and Research InstituteCo.Ltd.,Shanghai 200125,China)

机构地区：[1]同济大学污染控制与资源化研究国家重点实验室,上海200092 [2]上海市城市建设设计研究总院<集团>有限公司,上海200125

出　　处：《中国给水排水》2020年第17期18-22,共5页China Water & Wastewater

基　　金：上海市建设交通科研项目(建管2013-006-005)。

摘　　要：上海市某污水处理厂采用植物-泥-膜共生(PSFS)工艺进行改造,通过分析浓缩污泥性质及脱水性能指标,考察PSFS工艺对浓缩污泥特性的影响。结果表明,经PSFS工艺改造后,浓缩污泥的比阻和毛细吸水时间都有一定程度的降低,表明污泥脱水性能得到了改善。采用紫外可见连续光谱和三维荧光光谱对污泥浓缩上清液的溶解性有机物进行表征,发现经PSFS工艺改造后,污泥的微生物种群结构更丰富,而且腐殖化程度提高、可生物降解性降低。选取不同种类的调理剂对浓缩污泥进行调理,发现改造前污泥适合采用大分子、支链结构和阳离子度适中的阳离子聚丙烯酰胺(CPAM)进行调理,改造后污泥适合采用中分子、线性结构和阳离子度高的CPAM进行调理。A wastewater treatment plant in Shanghai has been transformed by plant-sludge-film symbiosis(PSFS)process.Through the analysis of thicked sludge properties and dewatering indexes,the effect of PSFS process on characteristics of thicked sludge was investigated.Main indicators of thicked sludge dewatering performance including specific resistance and capillary water absorption time were reduced after PSFS process transformation,indicating that dewaterability of the sludge was improved.Dissolved organic matters in sludge concentrate supernatant were characterized by ultraviolet-visible spectroscopy and three-dimensional fluorescence spectroscopy.After PSFS process transformation,the sludge had a more abundant microbial community structure,higher humification degree and lower biodegradability.Different kinds of conditioners were selected to condition the dewatering performance of the thicked sludge.It was found that the sludge before transformation was suitable to be conditioned by CPAM with macromolecule,branched chain structure and moderate cationic degree.However,the sludge after transformation was suitable to be conditioned by CPAM with moderate molecular,linear structure and high cationic degree.

关 键 词：浓缩污泥 植物-泥-膜共生(PSFS)工艺 溶解性有机物 脱水调理 

分 类 号：TU992[建筑科学—市政工程]