摘要
用复合聚铁絮凝剂FPAS处理造纸厂中段废水。考察了酸度、絮凝剂投放量、助剂投放量、搅拌速度、沉降时间对化学需氧量(COD)去除率的影响。确定优惠混凝条件:当待处理液pH在6.0～9.0之间,FPAS产品稀释液投放量为4mL/L,搅拌速度为120r/min,搅拌时间为3min,加入3.5mL1.5‰(m/m)助凝剂,继续搅拌4min,沉降10min后,COD去除率可达88%左右,优于传统的絮凝剂。该方法工艺简单、易于操作管理,有实际应用的价值。
Treatment of paper mill midcourse wastewater with coagulant FPAS was studied. The effects of acidity, amounts of coagulant and additives, stirring speed, stirring time and settling time on COD removal rate were evaluated. Results showed that under conditions of pH 6.0-9.0, FPAS diluent concentration 4 mL/L, stirring speed 120 r/min, stirring time 6 min, followed by addition of 3.5 mL of 1.5‰ additive （m/m） and stirring another 4 min and 10 rain of settling time, the removal of COD reached around 88%, which was much better than that achieved by using the traditional coagulant. This process is simple and of practical importance.
出处
《精细化工中间体》
CAS
2009年第2期56-59,共4页
Fine Chemical Intermediates
基金
国家科技支撑计划项目(2007BAC25B02)
湖南省重点学科环境科学资助项目(C2006180)
关键词
混凝沉降
造纸中段废水
水处理
FPAS
聚合硫酸铁
coagulation and settlement
paper mill midcourse wastewater
water treatment
FPAS
polymericferric sulfate
