【摘要】 当前多数污水厂出水总氮含量过高，脱氮问题刻不容缓。反硝化是污水脱氮重要方法，其中水体碳源不足，C/N比过小，是污水反硝化脱氮的主要瓶颈，需要添加外加碳源促进脱氮。结合当前国内外反硝化外加碳源最新研究成果，综述传统碳源和新型固体、液体碳源的优缺点。分析目前外加碳源研究和实际运用中存在的问题和挑战。结果表明，现阶段以传统碳源为基础研发的复合碳源适合商业推广，大多数新型碳源实际应用还存在问题，但其相对成本低，环保性高，来源广泛，是未来研究的热点。更多还原

【Abstract】 At present,the total nitrogen content in the effluent of most sewage plants is too high,and the problem of denitrification is urgent.Denitrification is an important method of wastewater denitrification,in which the lack of carbon source in water and the small C/N ratio are the main bottleneck of wastewater denitrification,and additional carbon source needs to be added to promote denitrification.Combined with the latest research results of denitrification plus carbon source at home and abroad,the advantages and disadvantages of traditional carbon source and new solid and liquid carbon source are reviewed.The problems and challenges in the research and practical application of additional carbon sources are analyzed.The results show that the composite carbon source based on traditional carbon source is suitable for commercial promotion.There are still problems in the practical application of most new carbon sources,but they have low relative cost,high environmental protection and wide sources,which is the focus of future research.更多还原