硫自养-异养协同反硝化技术的研究进展

Review of heterotrophic-sulfur autotrophic synergistic denitrification technology

介绍了硫自养-异养协同反硝化技术的基本特性,传统的异养反硝化运行成本高、污泥产量大,而硫自养反硝化存在脱氮效率低、消耗碱度等缺点,将两种工艺耦合可以实现取长补短。硫自养-异养协同反硝化技术是处理低C/N比废水最具潜力和经济效益的工艺之一,具有成本低、SO_(4)^(2-)产量少、pH稳定、高效脱氮等优点,对其协同机理、微生物群落特征和影响因素进行阐述,例举了该工艺在城市尾水、地下水等低碳氮比废水等方面的实际应用,总结现阶段存在的问题并对未来研究方向进行展望,为该技术的推广和实际应用提供理论参考。

The basic characteristics of heterotrophic-sulfur autotrophic denitrification technology were introduced.Traditional heterotrophic denitrification has high operating costs and high sludge production,while sulfur autotrophic denitrification has disadvantages such as low denitrification efficiency and alkalinity consumption,which can be complemented by coupling the two processes.Heterotrophic-sulfur autotrophic denitrification is one of the most promising and economical processes for treating low C/N ratio wastewater,which has the advantages of low cost,low SO_(4)^(2-)production,pH stabilisation,and high efficiency of denitrification,etc.The synergistic mechanism,microbial community characteristics,and influencing factors were elaborated,and the practical application of this process in urban tailwater,groundwater,and other wastewaters with low C/N ratio was illustrated.At the same time,the existing problems at this stage were summarised and the future research directions were outlooked to provide theoretical reference for the promotion and practical application of this technology.