短程反硝化-厌氧氨氧化工艺的影响因素及研究进展OA

[Objective]This paper aims to systematically sort out the reaction mechanisms,influencing factors,process forms,and current application status of the partial denitrification-Anammox(PDA)process,clarifying its technical advantages and existing challenges,with the hope of providing theoretical basis and direction guidance for further research and promotion of this process.[Methods]By combining literature reviews and case analysis,this paper deeply analyzes the microbial synergistic mechanisms of the PDA process,focusing on the impact of key factors such as temperature,pH,and carbon-to-nitrogen ratio(C/N)on process efficiency,and compares the operational characteristics and applicable conditions of two-stage and integrated PDA processes.[Results]PDA process operates most effectively under the conditions of a temperature range of 30 ℃ to 35 ℃,pH value of 7.0-8.5,and a C/N ratio of 2.0-3.0;the two-stage process is flexible and suitable for various water qualities,while the integrated process has a smaller footprint and lower costs but poses greater difficulty in regulation.Engineering practices indicate that the PDA process can achieve efficient nitrogen removal[total nitrogen(TN)removal rate＞90％],significantly saving energy and reducing consumption.[Conclusion]Through a comprehensive review of the PDA process,it is evident that PDA is an efficient and energy-saving new biological nitrogen removal technology with broad application prospects,but its promotion and application in practical engineering still need to address key issues such as low-temperature adaptability,microbial competition regulation,and system stability.Future efforts should strengthen the development of low-temperature strains,precise control of carbon sources,and engineering validation research.