Abstract: Natural zeolite is widely used and has a certain adsorption capacity for pollutants such as nitro-gen and phosphorus in domestic sewage. After modification by physical and chemical methods, the porosityand adsorption effect of zeolite can be improved, so as to effectively remove ammonia and phosphorus insewage. To achieve the purpose of effectively removing each substrate, natural zeolite was used as carrierin this paper, particles were prepared by alkaline pretreatment and salt ( sodium chloride solution) compos.ite modification. Sewage treatment in MBR were studied on the compound modification zeolite granules.The effects of amount of modified zeolite , reaction temperature and reaction time on the removal efficiencyand adsorption capacity of various substrates ( such as COD, 'TP and NH,’ -N) in wastewater were investiga-ted. The results showed that when the dosage of MZ is 10 g/L, the removal rate of COD, NH,' -N and TPin wastewater is the best, and the microorganisms are enriched with MZ adsorbent as the carrier, the ad-sorption traits are improved, and the removal efficiency of substrates also increased.

Key words: compound modification zeolite, sewage disposal, MBR technics