Experimental Study on the Treatment of CODCr in Printing and Dyeing Waste water with Polymer Flocculants
The treatment of printing and dyeing wastewater poses challenges due to its complex composition,high chromaticity,abundance of toxic substances,and difficulty in treatment.The utilization of coagulants is the prevalent approach in engineering.This study focuses on a specific printing and dyeing wastewater found in the ChangWu area.It investigates the impact of pH conditions,coagulant dosage,coagulant types,and compounding methods on the removal efficiency of CODCr(Chemical Oxygen Demand).The test results indicate that the three inorganic coagulants PAC,PAFC,and PAFCS show a trend of increasing CODCr removal efficiency with increasing dosage,followed by a decrease.The influence of pH on PFCAS is not significant,and PAFCS exhibits greater applicability within an alkaline range.At room temperature,at a pH of 9,the co-treatment of PAFCS and PAMC at dosages of 100 mg/L and 4 mg/L respectively,achieves a CODCr removal rate of 71.3％.This method has a significant effect on treating dyeing wastewater.
printing and dyeing wastewaterflocculationpolymerCODCr
NETL
NSTL
万方数据
