NIUJia,YUShuang,TANGYang-yang,et al.Biological Mechanism of Temperature Affecting the Removal of Ammonia Nitrogen from Drinking Water by Biological Activated Carbon[J].China Water & Wastewater,2024,40(15):44-49.
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Biological Mechanism of Temperature Affecting the Removal of Ammonia Nitrogen from Drinking Water by Biological Activated Carbon

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第40卷 Number: 第15期 Page: 44-49 Column: Date of publication: 2024-08-01
Author(s):
NIU　Jia1;  YU　Shuang1;  TANG　Yang-yang1;  HUANG　Yi-ting1;  GONG　Long-cong2;  WANG　Yue2;  CHEN　Ze-xin1;  LU　Wen-qi1;  CHEN　Xiao-chen3
（1. Fujian Engineering Research Center of Water Pollution Control and System Intelligence Technology， School of Ecological Environment and Urban Construction， Fujian University of Technology， Fuzhou 350118， China； 2. Fuzhou Water Supply Co. Ltd.， Fuzhou 350001， China； 3. College of Environment and Safety Engineering， Fuzhou University， Fuzhou 350108， China）
Keywords:
temperature;  ammonia nitrogen;  biological activated carbon;  ammonia- oxidizing archaea;  ammonia-oxidizing bacteria;  community composition
Abstract:
Aiming at the issue that biological activated carbon (BAC) fails to effectively remove ammonia nitrogen in drinking water during advanced treatment at low temperature, the BAC in an actual operating waterworks was chosen to establish a filter for continuous cultivation. Through indoor control experiments, the ammonia nitrogen removal performance and nitrification potential of different layers of BAC at normal and low temperature were compared. The abundance and community composition of AOA and AOB communities on BAC were analyzed using molecular biology techniques. Although the removal efficiency of each BAC layer at low temperature was lower than that at normal temperature, the removal efficiency of ammonia nitrogen at normal temperature could still be attained in the latter part of a backwashing cycle, and the nitrification potential was higher than that at normal temperature. The abundance of ammonia-oxidizing microorganisms on BAC at low temperature was greater than that at normal temperature, and the abundance of AOA changed the most (increased by 2 orders of magnitude). The T-RFLP analysis of the functional gene amoA demonstrated that A-OTU2 and A-OTU3 were the dominant AOA，and B?OTU5 was the dominant AOB at low temperature. In the future, greater emphasis should be placed on the colonization and activity enhancement of AOA and specific strains on BAC at low temperature.
Last Update: 2024-08-01