污水处理厂N2O的释放特征和减排途径研究

温室气体N2O含量的增加对气候变化产生显著影响,针对污水处理行业N2O减排控制的发展趋势与需求,以典型污水生物处理工艺为对象,对N2O产生机理、释放特征和核算、影响因素进行了综述和分析.研究表明,污水处理厂N2O的释放主要来自生物脱氮过程的硝化阶段和反硝化阶段,不同污水处理厂的N2O释放因子和释放特征不同.DO、温度和C/N是影响N2O释放的主要因素,最后从污水处理厂工艺运行和水质调控角度提出了具有可操作性的N2O减排途径与方法.

Characteristics and Reduction Strategies of N2O Emissions from Wastewater Treatment Plant

The increased content of the greenhouse gas N2O has a significant impact on climate change. In view of the devel-opment trend and demand of N2O emission control in wastewater treatment industry, this paper takes typical wastewater biological treatment process as the object, introduces the mechanism of N2O generation, N2O release characteristics and accounting and its influencing factors. The research shows that N2O release from biological nitrification and denitrification process. N2O release fac-tors and release characteristics of different wastewater treatment plants are different. DO, temperature and C/N are the main fac-tors that affect the release of N2O. Finally, from the perspective of process operation and water quality control of wastewater treat-ment plants, the N2O emission reduction approaches and methods are proposed.