Experimental study on treatment of ammonia nitrogen by modified zeolite and biological contact oxidation
Although the combined process of modified zeolite adsorption and biological contact oxidation has achieved certain research results in the treatment of ammonia nitrogen in micro-polluted water,the application effect of the combined process in different types of micro-polluted water lacks systematic research.In this paper,the removal effect of ammonia nitrogen under different operating conditions was analyzed through laboratorial-scale adsorption and biological contact oxidation experiments.It was found that modified zeolite can effectively improve the removal rate of ammonia nitrogen,among which organic modified zeolite had the best performance,with the removal rate of ammonia nitrogen up to 98.5%.Meanwhile,in the biological contact oxidation process,the increase of aeration and HRT can both increase the removal rate of ammonia nitrogen.The maturity of the biofilm also had a positive effect on the removal effect.
万方数据
维普
