Aluminium And Char Tiny Electrolysis For Pre-treatmenting Alkaline Dyeing And Finishing Wastwater

Dyeing wastewater is processing cotton, hemp, chemical fiber and its blendingproduct primarily come from the dye factory effluent. The quantity of Printing anddyeing wastewater is large, and chroma is high, the quality of biochemical is bad. Dyeingwastewater has the trait of abundence、 high chroma and difficult disposing inbiochemistrial ways. Disposing of dyeing wastewater can lighten the problem of lackingwater in our country, and has an impotent meaning to environmental protecting and thebalance of zoology. Through diposing X-3B and other simulate dyeing wastewater byaluminium and char tiny electrolysis, I research the best condition parmeter in-depth anddiversity of impacting factors. Simulation of initial printing and dyeing wastewater CODfor1050milligram/litre, the volume of0.4litres, through the parallel experiments provedthe best operation parameters for aluminum carbon volume ratio0.8:1, PH=12,electrolysis time of three hours. COD removal rate is about39%。In order to do the research on the influence of aluminum carbon power on thesubsequent the effect of process, after the electrolytic experiment, I also investigate theflocculation precipitation and the biological treatment of experiment. In the experiment,Al2(SO4)3.7H2O is regarded as coagulant. From the angle of treatment effect andeconomic comparison, fly ash as the coagulant effect is better than the polyacrylamidewith for coagulant, in PH=7, Al2(SO4)3.7H2O data of0.25g, fly ash for2g data, it isthe best effect of operation, and the removal rate is35.3%,In biological experiment, I adopt the complete hybrid of activated sludge. Firstly, Iinvestigate the mud for domestication, which proved that continuous aeration effect isbetter than intermittent aeration. The treatment effect is the best with the quantity ofoxygen50L/h and the aeration time12hoursUnder the optimum conditions, after aluminum electrolytic pretreatment andsubsequent carbon in water treatment, I conclude that COD is for57, SS for14. Itaccords with secondary emission standard.