One Example of Treating Wastewater from Printing and Dyeing Processes with High Concentrations of Pollutants.Alkali Reduction Wastewater
High alkalinity,high COD and poor biological treatment performance are the main difficulties in the treatment of alkali reduction wastewater,which is a common refractory wastewater.Taking a polyester fabric enterprise in Zhejiang as an example,the total daily treatment of wastewater in the production process is 2000 m3,of which the daily treatment capacity of alkali reduction wastewater is 200 m3,and the daily treatment capacity of comprehensive wastewater is 1 800 m3.The company uses acid precipitation-Fenton pretreatment of alkali reduction wastewater,coagulation and precipitation-hydrolysis acidification-A/O treatment of comprehensive wastewater.The average removal rates of COD,BOD5,SS,ammonia nitrogen and TN were 92.8%,96.7%,92.5%,76.3% and 76.2%,respectively,and the effluent quality was better than the indirect discharge standard stipulated in GB 4287-2012,and the operating cost was 6.62 yuan/m3.
alkaline reduction wastewaterterephthalic acidFenton oxidationwaste water treatment
万方数据
维普
