Activated Zeolite is a natural zeolite made through the activation of a variety of special process, the adsorption performance more than the natural zeolite, ion exchange performance is also better, not only to remove the water turbidity, color, smell, and on the water harmful heavy metals, such as: chromium, cadmium, nickel, zinc, mercury, iron ions and organic compounds: phenol, BHC, three nitrogen, ammonia nitrogen, phosphate ions and other substances with adsorption exchange, but also conducive to removal of various micro- flooding the fluid does not contain pollutants and toxic substances harmful to human health, iron removal, fluoride effect is more significant. Therefore Activated Zeolite is an industrial water supply, wastewater treatment and water filtration media of new ideals. 
 BAF and analysis of the use of media. BAF with the zeolite as filter can effectively remove COD, ammonia and turbidity, the optimum hydraulic loading test conditions for the 2.2m / h (hydraulic retention time of 1.4h), this time on the COD, ammonia and turbidity removal rates were 73.9%, 88.4% and 96.2%, the corresponding average effluent concentrations were 43.4mg / L, 3.5mg / L and 3.7NTU, can achieve the State Environmental Protection Administration, Tianjin University, put forward suggestions for cooling back to the water quality the relevant index value (|||) requirements. 
 Using zeolite and sand filter media as BAF treatment of textile wastewater. Cell counting results showed that the zeolite on the growth of Nitrosomonas bacteria and the number of nitrifying bacteria were 3.0 × 108 and 2.2 × 109CFU/mL. The amount of sand filter were grown on 4.5 × 108 and 6.5 × 108 CFU / mL. the number of nitrifying bacteria from the point of view, zeolite is more suitable for microbial nitrification, also from the removal of organic matter and TKN of view, the zeolite filter is better than the effect of the BAF the sand filter of the BAF. BAF using zeolite as the filter media can make the textile wastewater COD removal rate of 86% ~ 92%, BOD removal rate of 99% color removal rate -79% 77%, which is due to the natural zeolite The specific surface area than sand media filter, suitable microbial attachment, and zeolite ion exchange capacity, can absorb water, NH4 +, and appropriate environment, a large number of nitrifying bacteria growth, so that NH4 + is converted to nitrate . 
 Size according to the needs of production, better water flow, filtration cycle is long, easy to backwash, sewage interception capability.