钛盐混凝剂调理对活性污泥絮体理化性质的影响作用机制

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境水质学国家重点实验室

	钛盐混凝剂调理对活性污泥絮体理化性质的影响作用机制
	王彩霞; 张伟军; 王东升; 王庆飞; 喻德忠
刊名	环境科学
	2016
卷号	37 期号:6 页码:2243-2251
关键词	污泥四氯化钛聚合氯化钛脱水性三维荧光
其他题名	Influencing Mechanism of Titanium Salt Coagulant Chemical Conditioning on the Physical and Chemical Properties of Activated Sludge Flocs
中文摘要	研究了预制的不同形态钛盐混凝剂对污泥的调理效果,结果表明不同碱化度[B值,即n(OH)/n(Ti)]聚合氯化钛(PTC)单一调理污泥时,在相同投加量时,PTC_(0.5)调理后污泥比阻、可压缩性以及EPS中有机物含量均低于其他形态钛盐,其最佳投加量以TSS计,为0.005 g·g~(-1),该投加量远低于传统的铁盐和铝盐混凝剂. 不同B值PTC调理污泥脱水能力的强弱顺序为: PTC_(0.5)>PTC_(1.5)>TiCl_4>PTC_(2.5). 同时分析了调理过程中污泥絮体粒径(d_(0.5))和分形维数(D_F)的变化特征. 采用三维荧光光谱和高效体积排阻色谱,解析了钛盐混凝剂对污泥胞外聚合物(EPS)分布和组成的影响,EPS蛋白峰的荧光强度和有机物相对分子质量峰分布变化规律与污泥比阻、可压缩性和脱水能力变化规律有一定相关性.
英文摘要	The effect of the different forms of titanium salt coagulant conditioning on sludge dewatering performance was studied. The result showed that the sludge dewaterability was the best and the specific resistance to filtration (SRF), the compressibility and the content of organic content in EPS were the lowest when B=0.5 compared with others. The optimal dosage of polymeric titanium chloride (PTC) was 0.005 g·g~(-1), which was far less than those of the traditional iron salts and aluminum coagulants. When the dosage of PTC with different B values was 0.005 g·g~(-1), the order of dewaterability was: PTC_(0.5)>PTC_(1.5)>TiCl_4>PTC_(2.5).In addition, the variations of characteristics such as particle size (d_(0.5)) and fractal dimension(D_F) of sludge during conditioning were analyzed. The effect of titanium salt coagulant conditioning on the distribution and composition of the sludge extracellular polymeric substance(EPS) was characterized by Three-dimensional Excitation Emission Matrix Fluorescence (3DEEM) and High Performance Size Exclusion Chromatography(HPSEC).The decrease of fluorescent intensity and molecular weight of peak distribution and intensity of organics in EPS was highly correlated to the improvement of the dewatering performance and change of sludge properties.
收录类别	CSCD
CSCD记录号	CSCD:5727960
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/36664]
专题	生态环境研究中心_环境水质学国家重点实验室
推荐引用方式 GB/T 7714	王彩霞,张伟军,王东升,等. 钛盐混凝剂调理对活性污泥絮体理化性质的影响作用机制[J]. 环境科学,2016,37(6):2243-2251.
APA	王彩霞,张伟军,王东升,王庆飞,&喻德忠.(2016).钛盐混凝剂调理对活性污泥絮体理化性质的影响作用机制.环境科学,37(6),2243-2251.
MLA	王彩霞,et al."钛盐混凝剂调理对活性污泥絮体理化性质的影响作用机制".环境科学 37.6(2016):2243-2251.