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-N in the effluent indicated a relatively short-range nitrification and denitrification reaction in the MBBR. The results of 16SrDNA sequencing of P1-P5 microbial samples found that changes in the concentration of ammonia nitrogen in the influent produced significant changes in the composition of the microbial community in the MBBR. The genera Ottowia and Flavobacterium played an important role in the nitrogen removal of the MBBR system.
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Yuan et al. (2020) studied this question.
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