Biofilm formation of ammonia-oxidizing bacteria and anaerobic ammonium-oxidizing bacteria on different biocarries
LI Hong-jiang1, WANG Chao2, XU Xiao-chen1, YANG Feng-lin1, ZHANG Shu-shen1
1. Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China;
2. Collaborative Innovation Center for Advanced Nuclear Energy Technology, Tsinghua University, Beijing 100084, China
The typical setbacks of the operation of anaerobic ammonium oxidation (Anammox) process were the serious sludge loss and long startup time. Herein, the biofilm formation experiments were designed to select several commercial biocarriers with better biofilm performance for ammonia-oxidizing bacteria (AOB) and anaerobic ammonium-oxidizing bacteria (AnAOB). The results showed that AQ1polyurethane cubic biocarrier was the most suitable biocarrier for AOB to form biofilm. The ammonia oxidation rate of matured biofilm was (0.81±0.08)mg N/(L·h) and the biofilm biomass was (0.87±0.14)mg VSS. Nitrosomonas was dominant species in the activated sludge. For AnAOB (Candidatus Kuenenia), K3 annular biocarrier (made of polyethylene or polypropylene) was the most suitable biocarrier for the biofilm formation. The anaerobic ammonium oxidation rate of matured biofilm could reach (3.27±0.10)mg N/(L·h), and the biofilm biomass was (2.74±0.40)mg VSS. The biofilm formation of AnAOB on the K3 biocarrier was better than AOB. The reason was that the content of extracellular polymeric substances secreted by AnAOB was higher than that of AOB, and extracellular polymeric substances play an important role in biofilm formation.
李鸿江, 王超, 徐晓晨, 杨凤林, 张树深. AOB与AnAOB在不同生物填料上挂膜效果的研究[J]. 中国环境科学, 2019, 39(10): 4141-4149.
LI Hong-jiang, WANG Chao, XU Xiao-chen, YANG Feng-lin, ZHANG Shu-shen. Biofilm formation of ammonia-oxidizing bacteria and anaerobic ammonium-oxidizing bacteria on different biocarries. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(10): 4141-4149.
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