Dyeing and printing wastewater treatment using fly-ash coated with chitosan  

作　　者：陈忻 孙恢礼 

机构地区：[1]South China Sea Institute of Oceanology,Chinese Academy of Sciences [2]Graduate School,Chinese Academy of Sciences [3]Department of Chemistry and Chemical Engineering,Foshan University

出　　处：《Chinese Journal of Oceanology and Limnology》2009年第4期875-881,共7页中国海洋湖沼学报（英文版）

基　　金：Supported by the Science and Technology Development Foundation of Foshan (No.2005060071)

摘　　要：Printing and dyeing industry is a considerable source of environmental contamination. In this study treatment of printing and dyeing wastewater with a new type of sewage treatment agent, fly-ash coated with chitosan particles （FCCP）, was examined. The effects ofpH, stirring time, sedimentation time and temperature on color, COD, turbidity and NH3-N removal were determined. The optimum dosage of FCCP and the influence of individual factors on removal efficiency were tested. The optimum parameters determined using the L16 （45） orthogonal experiment were as follows： FCCP （weight ratio of chitosan to fly-ash 1：6） dosage, 4 g.L^-1; temperature, 35℃; pH, 4. The stirring time and sedimentation time were 20 min and 5 h, respectively. Under these optimum conditions, the color, COD and NH3-N removal ratios were 97%, 80% and 75%, respectively.Printing and dyeing industry is a considerable source of environmental contamination.In this study treatment of printing and dyeing wastewater with a new type of sewage treatment agent,fly-ash coated with chitosan particles (FCCP),was examined.The effects of pH,stirring time,sedimentation time and temperature on color,COD,turbidity and NH3-N removal were determined.The optimum dosage of FCCP and the influence of individual factors on removal efficiency were tested.The optimum parameters determined using the L16 (45) orthogonal experiment were as follows:FCCP (weight ratio of chitosan to fly-ash 1:6) dosage,4 g·L-1;temperature,35°C;pH,4.The stirring time and sedimentation time were 20 min and 5 h,respectively.Under these optimum conditions,the color,COD and NH3-N removal ratios were 97%,80% and 75%,respectively.

关 键 词：FCCP printing and dyeing wastewater TREATMENT color removal COD removal 

分 类 号：X703[环境科学与工程—环境工程]