反硝化脱氮工艺补充碳源选择与优化研究进展

碳源是制约生物脱氮效率的重要因素。我国城市污水碳源不足,需要考虑碳源补充提供反硝化电子供体,开发各种新型碳源作为生物反硝化脱氮工艺可选择的碳源,如工业废水、初沉污泥水解产物、植物秸秆等,或改变工艺优化系统碳源。结合国内外对于反硝化碳源补充的研究成果,对反硝化脱氮速率以及动力学的研究现状进行了综述,并对不同碳源的选择和优化进行了分析和总结。

A Review on Carbon Source Supplement and Optimization in Denitrification Process

Carbon source is the main factor influencing biological denitrification efficiency.In most cities of China,carbon content in sewage was observed to be low and not enough to provide electron donors needed in biological denitrification process,herein carbon source supplement should be considered.New types of carbon sources,such as industrial wastewater,hydrolysis products of pre-settling sludge,natural plant stalk such as straw,and soon were developed as external carbon source for biological denitrification process;or systematic carbon was utilized through treatment process optimization.In this paper,the related mechanisms and factors affecting denitrification rate and studies in denitrification kinetics was reviewed.Based on researches conducted recently,carbon source choose and optimization are analyzed and summarized.