Study Of Biochemical Treatment And Physical-chemical Treatment For Coke Waste Water

China is the largest producer of coke,with an annual output of 120 million tons of coke, and the world's total output of coke,1 / 3 more than in recent years.For the international market to greatly increase the demand for coke,China's coke industry is developing rapidly.There is a lot of coking plants in China,they produce coke and gas.Coking waste water produced when the plant producing coke and gas.This paper study biological treatment and physical and chemical processing for co-king wastewater,which got from Shougang coking plant regulation pool.We designed t-o enable coking wastewater to reach the discharge standards,to provide a little bit of reference for actual coking wastewater treatment.Coking biochemical treatment of wastewater by A1-A2-O technology,aerobic divided into one of the membrane bioreactor and traditional activated sludge process.A working conditions selected,to inspect the reactor's stability running at the long-term treatment;Compare the two process's removel effect on ammonia,total nitrogen,and organic, the results showed that the two reactors's treatments are relatively stable.Membrane bioreactor,because of its character-istics and its removel effect is better than conventional activated sludge process.In the given conditions,the removel of CODcr nitrogen and total nitrogen of ShouGang coking plant waste water is more than 80%,99%and 65%.Research compared the mixture in submerged membrane bioreactor with the mixture in the traditional activated sludge.The physical properties of the mixture,including the concentration of sludge,sludge production rate,the settling capacity of sludge,the mixture viscosity,sludge particle size distribution;The biological properties of the mixture,including sludge activity,biological and metabolic production,different species.The study found that former compared to the latter,the high concentration of sludge,viscosity,low rate of sludge production,poor performance of the settlement,the low activity of sludge,small average size, similar to those in the concentration,its has large filtration resistance.Biological treatment for non-standard water,and follow-up using activated carbon adsorption,coagulation,Fenton oxidation.The study found broken carbon is more effective than carbon column,but as a single use of activated carbon to deal with the cost is large; coagulation and Fenton oxidation by orthogonal experiments to determine the optimum conditions,but alone does not meet the national emission standards,for secondary showed the coagulation and activated carbon,can significantly reduce processing costs,Fenton oxidation follow-up to join the PAM flocculation,the effect can be optimized to achieve the national emission standards.