Reducing nitrous oxide emission in wastewater systems by pathway regulation

一氧化二氮（N2O）是一种强效温室气体，可以在废水处理系统的生物脱氮过程中产生。N2O的排放主要发生在曝气区，在这种条件下，氨氧化细菌（AOB）是N2O产生的主要贡献者。本项目旨在对混合培养废水处理系统中AOB产N2O进行系统研究。该项目旨在提高对不同操作条件下AOB产生N2O途径的基本认识，并提供一个可靠估计废水处理系统N2O排放量的建模工具以及减少排放的策略。

Nitrous oxide (N2O) is a potent greenhouse gas that can be produced during biological nitrogen removal in wastewater treatment systems. N2O emissions primarily occur in aerated zones due to active striping, and ammonia-oxidizing bacteria (AOB) are the major contributors to N2O production under such conditions. The project aims to carry out a systematic study on N2O production by AOB in mixed culture wastewater treatment systems. The project aims to advance the fundamental knowledge on N2O production pathways by AOB under different operational conditions, and deliver a modelling tool for reliably estimating N2O emission from wastewater treatment systems as well as strategies to reduce the emissions.