determination of membrane bioreactor efficiency in treatment of composting plant leachate

background: leachatecontaining high levels of organic pollution with ammonia, halogenatedhydrocarbons, heavy metals and inorganic salts. among the various methods fortreating leachate, has been developed membrane processes so that a morebiological process of membrane processes is used for separation of solid -liquid. the aimof this study was to evaluate the efficiency of membrane bioreactor efficiencyin treatment of composting plant leachate.methods: this study is a cross-sectional study was carried outat a laboratory scale.in this study, sbr used with 5 litercombined with hollow fiber membrane reactor about 50% porosity and operational pressurempa 0.02.150 samples were analyzed andaverage concentration of cod, ammonia, phosphorus and tss was measured in inletleachate and bioreactor effluent. finally removal efficiency was determined.findings: bioreactor efficiency removal for cod, bod5,tss, ammonia and phosphorus, respectively were approximately 99.2, 99, 89.2,87and 98٪.the paired t test, showed astatistically significant difference between the input leachate and bioreactoreffluent (p-value <0.05). based on one-sample t test, there aresignificantly different between values of the bioreactor effluent quality and standardsvalues (p-value <0.05).conclusion: raw leachate pretreatment processes such as microscreening, chemical precipitation, and ammonia stripping, anaerobic reactorswould be very effective in bioreactor performance.