低强度超声波在污水生物脱氮中的研究进展

Research Progress of Low-Intensity Ultrasonic in Biological Nitrogen Removal from Wastewater

“双碳目标”背景下新型生物脱氮工艺更具有碳减排潜力。然而,以厌氧氨氧化工艺为代表的新型生物脱氮工艺在维持稳定运行状态方面受多种因素影响,导致脱氮效率不稳定,限制了其实际应用与推广。低强度超声波技术作为一种清洁高效的物理方法具有促进污泥活性、筛选微生物菌群的特点,与生物方法相结合可提高整体脱氮效果。论文围绕低强度超声波在强化生物脱氮性能中的作用展开讨论,介绍了超声波生物效应机理,分析了声能密度、辐照时间、超声频率等影响生物脱氮的因素,并从氮转化速率、污泥活性、微生物群落及污水生物脱氮的潜在机理方面综述了低强度超声波在污水生物脱氮中的应用,旨在为低强度超声波在脱氮实际应用中提供支撑。

Under the background of"dual carbon target",the new biological nitrogen removal process has more carbon emission reduction potential.However,the new biological nitrogen removal process represented by anaerobic ammonia oxidation process is affected by many factors in maintaining a stable operating state,resulting in unstable nitrogen removal efficiency,which limits its practical application and popularization.As a clean and efficient physical method,low-intensity ultrasonic technology has the characteristics of promoting sludge activity and screening microbial flora,and combining with biological methods can improve the overall nitrogen removal effect.This paper discusses the role of low-intensity ultrasound in enhancing the performance of biological nitrogen removal,introduces the mechanism of biological effect of ultrasound,and analyzes the factors affecting biological nitrogen removal such as sound energy density,irradiation time and ultrasonic frequency.The application of low intensity ultrasound in wastewater biological nitrogen removal was reviewed from the aspects of nitrogen conversion rate,sludge activity,microbial community and potential mechanism of biological nitrogen removal in order to provide support for the practical application of low intensity ultrasound in nitrogen removal.