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   Groundwater Denitrification By Using Mbbr With Kmt Packing  
نویسنده Hemmati A. ,Raeisi M. ,Borghei M.
منبع Iranian Journal Of Chemical Engineering - 2020 - دوره : 17 - شماره : 4 - صفحه:60 -68
چکیده    Many communities in the world use groundwater as a source of potable water. the high nitrate concentration is a serious problem in groundwater usage. this study utilizes a biological denitrification method to investigate a moving bed biofilm reactor (mbbr) for the case of tehran’s groundwater. one pilotscale mbbr with a 3 liter volume was designed and used in this research. the denitrification reactor operates under anoxic conditions. methanol was used as a carbon source in the reactor throughout the study, and fifty percent of the reactor volume was occupied with kmt packing (k1). to determine the optimum nitrate loading rate, the concentration of nitrate changed from 100 to 400 mg n/l. it was concluded that heterotrophic denitrifying bacteria converted nitrate to nitrogen. according to obtained results, the removal efficiency and optimum loading rate were estimated during the experiments in different concentrations and different hrts for this type of reactor. sodium nitrate was in the feed source in the anoxic reactor. the maximum removal rate of nitrate was measured to be 2.8 g of no_3n m^2 carrier d1. therefore, it was shown that the optimum loading rate of nitrate and the optimum cod/n were equal to 3.2 g of no_3n m^-2 carrier d^-1 and 6 g of cod/g n respectively.
کلیدواژه Denitrification ,Mbbr ,Groundwater ,Kmt ,Carbon Source
آدرس Semnan University, Department Of Chemical, Petroleum And Gas Engineering, Iran, Islamic Azad University, Science And Research Branch, Young Researchers And Elite Club, Iran, Sharif University Of Technology, Biochemical & Bioenvironmental Research Center, Department Of Chemical And Petroleum Engineering, Iran
پست الکترونیکی mborghei@sharif.edu

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