废水生物脱氮工艺中N2O排放数学模型研究进展

N_2O是一种重要的温室气体,而污水生物脱氮处理过程是N_2O的潜在产生源之一。随着污水处理量和处理程度的不断提高,N_2O的排放量也将不断增大。建立N_2O排放数学模型对污水生物脱氮系统中N_2O生成机制的深入研究和污水处理行业N_2O削减工艺技术的开发具有重大的理论及实践意义。本文归纳了生物脱氮工艺的原理,系统阐述了生物脱氮工艺中N_2O的生成机理和排放数学模型的类型、建立方法及应用情况。在此基础上,对生物脱氮工艺中N_2O排放数学模型的研究现状和研究方向进行了总结和展望,以期为N_2O排放数学模型的完善、N_2O排放量的削减、污水生物脱氮工艺的优化及污水处理行业的可持续发展提供理论基础和科学依据。

Recent advances in mathematical modeling of nitrous oxideemissions from biological nitrogen removal processes

Nitrous oxide (N₂O) is a significant greenhouse gas and can be produced and emitted from the biological nitrogen removal processes in the wastewater treatment plant (WWTPs). Along with the enhancement of amount and degree of wastewater treatment, the emission of N₂O will increase accordingly. The establishments of mathematical models for N₂O emissions from the biological nitrogen removal processes in WWTPs have important theoretical and practical significance on the thorough investigations on the mechanisms of N₂O production and the development of N₂O reduction strategies. The present paper summarized the principals of various biological nitrogen removal processes and systematically elaborated the production mechanisms of N₂O and the types, establishment methods and applications of mathematical models simulating N₂O emissions. Furthermore, conclusions were achieved based on the research status and perspectives on future research directions were presented to gain a better modeling of N₂O emissions and to provide supports for the reduction of N₂O emission, the optimization of the biological nitrogen removal processes and the sustainable development of WWTPs.