引用本文:吴幼权,郑怀礼,张 鹏,等.复合絮凝剂CAM-CPAM的制备及其污泥脱水性能[J].环境科学研究,2009,22(5):535-539.
WU You-quan,ZHENG Huai-li,ZHANG Peng,et al.Sludge Dewatering Performance and Preparation of Composite Flocculants CAM-CPAM[J].Reserrch of Environmental Science,2009,22(5):535-539.]
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复合絮凝剂CAM-CPAM的制备及其污泥脱水性能
吴幼权1, 郑怀礼1,2, 张 鹏3, 焦世□1, 杨 铀3
1.重庆大学城市建设与环境工程学院,重庆 400045;2.重庆大学,三峡库区教育部重点实验室,重庆 400045;3.重庆大学化学化工学院,重庆 400044
摘要:
在氮气保护下,以硝酸铈铵为引发剂,采用壳聚糖与有机单体丙烯酰胺接枝共聚得到壳聚糖衍生物(CAM),并将其与阳离子聚丙烯酰胺(CPAM)复配,制备了一种复合絮凝剂CAM-CPAM. 通过红外图谱(IR)和电镜扫描(SEM)分析,对复合絮凝剂CAM-CPAM的结构进行了表征,对污泥脱水机理进行了探讨,并考察了复合絮凝剂用量对污泥脱水、沉降性能以及对滤液浊度和透光率的影响. 结果表明,复合絮凝剂CAM-CPAM具有良好的污泥脱水性能,当其投加量为30 mg/L时,污泥脱水率可达90%以上,沉降速率可达0.55 cm/s,滤液浊度小于8 NTU,透光率高于85%.
关键词:  壳聚糖  丙烯酰胺  接枝共聚  污泥脱水  复合絮凝剂
DOI:
分类号:
基金项目:国家自然科学基金项目(20777095);重庆市自然科学基金重点项目(CSTC-2006BA7029)
Sludge Dewatering Performance and Preparation of Composite Flocculants CAM-CPAM
WU You-quan1, ZHENG Huai-li1,2, ZHANG Peng3, JIAO Shi-jun2, YANG You3
1.Faculty of Urban Construction & Environmental Engineering, Chongqing University, Chongqing 400045, China;2.Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, State Ministry of Education, Chongqing University, Chongqing 400045, China;3.College of Chemistry Engineer, Chongqing University, Chongqing 400044, China
Abstract:
Modified chitosan was made by graft co-polymerization of chitosan and acrylamide under nitrogen atmosphere using ceric ammonium nitrate as initiator. The modified chitosan was then combined with cationic polyacrylamide (CPAM) to obtain a kind of composite flocculant called CAM-CPAM, which was used to treat activated sludge. The structure of CAM-CPAM was characterized by IR and SEM, and the mechanism of dewatering was analyzed. The factors affecting sludge dewateringperformance were discussed in this study, including deposition velocity and dosing quantity; the results indicate that when the dosage of CAM-CPAM was 30 mg/L,the dehydration rate of activated sludge reached over 90%. The settling velocity was up to 0.55 cm/s, the turbidity of effluent was less than 8 NTU, and the transmittance was over 85%.
Key words:  chitosan  acrylamide  grafting copolymerization  sludge dewatering  complex flocculants