Optimization of the use of polyelectrolytes for dewatering industrial sludges of various origins

被引:67
作者
Bohm, N [1 ]
Kulicke, WM [1 ]
机构
[1] UNIV HAMBURG,INST TECH & MAKROMOLEK CHEM,D-20146 HAMBURG,GERMANY
关键词
polyelectrolytes; flocculation; solid-liquid separation; zeta-potential; bridging model; patch charge model;
D O I
10.1007/s003960050054
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Four different industrial slurries were flocculated with polymeric flocculating agents (port sediment, sewage sludge, sugar beet washings and an aluminum hydroxide suspension). The quantities of flocculating agent employed were optimized with the aid of a patented, portable flocculation and dewatering apparatus. Using sewage sludge as an example, it was possible to arrive at predictions for particular doses of flocculating by means of a combined method of dewatering experiments and electrokinetical measurements. The results of monoflocculation and dual flocculation made it possible to deduce that there are similarities in the flocculation and dewatering behavior of slurries with comparable parameters. Comparison of the sediment particles and the polymer coils revealed a size ratio of 60:1, with the former being the larger. This was then used to devise modifications to the patch charge model and the bridging model as a function of the molar mass of the flocculating agent. The modifications were found to agree well with the experimental findings and the structural conceptions of macromolecular substances.
引用
收藏
页码:73 / 81
页数:9
相关论文
共 25 条
[1]  
*ABW ZAHL, 1994, INF HAMB STADT
[2]  
BARTELT A, 1994, PROG COLL POL SCI S, V95, P161
[4]  
BOHM N, 1996, THESIS U HAMBURG
[5]   USE OF FLOCCULANTS IN THE MECHANICAL SEPARATION OF LIQUIDS [J].
BURKERT, H ;
HORACEK, H .
CHEMIE INGENIEUR TECHNIK, 1986, 58 (04) :279-286
[6]   FIBER-OPTIC SENSOR TECHNIQUE FOR FLOCCULANT DOSE CONTROL IN FLOWING SUSPENSIONS [J].
EISENLAUER, J ;
HORN, D .
COLLOIDS AND SURFACES, 1985, 14 (02) :121-134
[7]  
EISENLAUER J, 1983, Z WASSER ABWASS FOR, V16, P9
[8]  
FRIEDEL C, 1995, VDI NACHRICHTEN, V49, P28
[9]   INTERFACIAL PROBLEMS IN SOLID LIQUID SEPARATION [J].
GOSELE, W .
CHEMIE INGENIEUR TECHNIK, 1986, 58 (03) :169-175
[10]  
GRIEBEL T, 1992, MAKROMOL CHEM, V193, P811