Abstract
In recent years,the phenomenon of total nitrogen loss which is found in single aerobic or oxygen-limited wastewater treatment systems has attracted researchers’concern.Microbiological theory and related studies of nitrogen loss were reviewed in this paper.It involves the different groups of bacteria alone or in cooperation,including nitrogen removal by autotrophic nitrifying bacteria and aerobic denitrifying bacteria,the inter-synthesis between nitrifying bacteria and aerobic denitrifying bacteria;and the cooperation of nitrifying bacteria and anaerobic ammonia oxidation(Anammox)bacteria.The new biological nitrogen removal mechanisms,which have incomparable advantages to the traditional nitrification-denitrification nitrogen removal technique,have important significance to enhance nitrogen removal in wastewater treatment.Fig 8,Ref 53
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