Review on the Fate and Mechanism of Nitrogen Pollutant Removal from Wastewater Using a Biological Filter
Honglei Wang1, Wei Zhi2, Na Deng1, Guodong Ji3
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1State Key Laboratory of Soil Erosion and Dry land Farming on the Loess Plateau,
Institute of Soil and Water Conservation, Northwest A & F University, Yangling 712100, Shaanxi, China
2John and Willie Leone Department of Energy and Mineral Engineering, The Pennsylvania State University,
University Park, Pennsylvania 16802, United States
3Key Laboratory of Water and Sediment Sciences, Ministry of Education, Department of Environmental Engineering,
Peking University, Beijing 100871, China
Submission date: 2016-12-21
Final revision date: 2017-02-25
Acceptance date: 2017-02-25
Online publication date: 2017-08-31
Publication date: 2017-09-28
Pol. J. Environ. Stud. 2017;26(5):1943-1954
Biological filter (biofilter) technology has developed rapidly and has been extensively employed to remove nitrogen pollutants originating from aquatic environments. Due to the different responses of nitrogen microorganisms to various operating parameters and environmental factors, achieving satisfactory nitrogen removal in biofilters remains a challenge. Hence, this review aims to provide useful information on the underlying nitrogen removal mechanisms in biofilters by giving a comprehensive review of traditional and newly discovered nitrogen transformation processes and microbial communities associated with nitrogen cycling. Firstly, a brief summary on overall performance of biofilters using traditional and newly discovered methods for nitrogen removal was presented. The detailed nitrogen transformation pathways and functional microbial communities associated with nitrogen cycling in biofilters were discussed. A brief overview is followed by a more detailed discussion of techniques for assessing nitrogen microbial population dynamics and community structure and function. Finally, conclusions and recommendations for future work are highlighted.
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