Biological aerated filter treated washing wastewater for reuse using ozonation as a pre-treatment
The combination of chemical and biological treatment processes is a promising technique to reduce refractory wastewater.Ozonation has been applied to many fields in water and wastewater treatment.especially for textile wastewater effluents.Ozonafion can achieve high color removal.enhance biodegradability,and reduce the chemical oxygen demand(COD),the biological technologies after ozonation as a pre-treatment can further decrease the COD of wastewater.In this study the ozonizing-biological aerated filter process was used to treat the washing wastewater for reuse after conventional treatment.The result showed that when the influent qualities were COD about 80me/L.Color 16 degree and turbidity about 8 NTU.Using the combination process with the dosages of ozone were 30-45mg/L,the hydraulic retention time(HRT)of BAF was 3-4 hours respectively.The effluent qualities were COD less than 30mg/L,color 2 degree and turbidity less than 1NTU,the cost oftreatment was less than one yuan/t wastewater,and this process could meet the high quality washing water reusing.
washing wastewateL ozonation biological aerated filter water reuse
WANG Xiaojun CHEN Sili GU Xiaoyang XIAO Jin
School of Environmental Science and Engineering,South China University of Technology,Guangzhou Higher Education Mega Center 510006,PR China
国际会议
西安
英文
517-523
2008-05-15（万方平台首次上网日期，不代表论文的发表时间）