土木与环境工程学报（中英文）2021，Vol.43Issue(1)：184-192,9.DOI:10.11835/j.issn.2096-6717.2020.087
游离氨对活性污泥系统中脱氮性能及胞外聚合物的影响
Effect of free ammonia on nitrogen removal and extracellular polymeric substances in the suspended activated sludge system
摘要
Abstract
To investigate the influences of free ammonia on nitrogen removal,the contents of extracellular polymeric substances and the chemical composition (proteins, polysaccharides, and DNA ), four laboratory-scale sequencing batch reactors fed with synthetic wastewater were operated at free ammonia concentrations of 0.5,5,10 and 15 mg/L (R0.5 ,R5 ,R10 and R15 ,respectively).Results showed that high nitrogen removal efficiencies (97.6％～99.4％)were achieved under four free ammonia concentrations. Free ammonia had a significant impact on the three kinds of extracellular polymeric substance (loosely bound extracellular polymeric substance, tightly bound extracellular polymeric substance and total extracellular polymeric substance,respectively)and their composition.Results showed that with the increased of initial free ammonia concentrations from 0.5 to 10 mg/L,the production of three kinds of extracellular polymeric substance and their components were significantly increased.Further increased of free ammonia concentrations to 15 mg/L caused a decreased trend of them.Moreover,proteins were the main component of loosely bound extracellular polymeric substance,while polysaccharides dominated in tightly bound extracellular polymeric substance and total extracellular polymeric substance under different free ammonia concentrations.It was found that the contents of three kinds of extracellular polymeric substance and their components showed a similar variation tendency to the NO-x—N contents during the whole cycle under four free ammonia concentrations.关键词
游离氨/脱氮/胞外聚合物/蛋白质/多糖Key words
free ammonia/nitrogen removal/extracellular polymeric substance/proteins/polysaccharides分类
资源环境引用本文复制引用
蔡晨健,吴常峰,杨浩,陈桐生,孙洪伟..游离氨对活性污泥系统中脱氮性能及胞外聚合物的影响[J].土木与环境工程学报（中英文）,2021,43(1):184-192,9.基金项目
National Natural Science Foundation of China (No.51668031) （No.51668031）
