Principle and application of urea wastewater biological treatment technology
JIA Fang-xu, LIU Ying-jie, YU Xiao-hua, CAI Wei-wei, XING Wei, YAO Hong
Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China
Abstract：The treatment of urea wastewater has become an urgent problem. Biological treatment is a popular method in dealing with urea wastewater due to the advantages of short process flow, low cost, anti-shock load and no secondary pollution etc. In this review, based on the principle of urea bio-hydrolysis, the development process, enzymatic structure and hydrolysis mechanism of urease were analyzed in depth from the mechanism, and the application of traditional biological urea denitrification method was systematically reviewed. In addition, in order to better understand the potential of anaerobic ammonia-oxidizing bacteria to degrade urea and its application in practical engineering, this paper summarized the relevant research results from the perspectives of microbiology and engineering application. Finally, the Suggestions and prospects of the research on biological treatment of urea wastewater are put forward in order to provide a strong theoretical basis and technical support for practical engineering application.
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