硫自养-异养协同反硝化技术研究进展OA

Currently,secondary effluents from municipal wastewater treatment plants commonly exhibit elevated concentrations of total nitrogen and nitrate nitrogen.Conventional advanced denitrification processes rely heavily on external carbon sources,resulting in high operational costs,which highlights the urgent need for novel,efficient,and low-energy-consumption denitrification technologies.This study systematically reviews the mechanisms,advantages,and limitations of existing heterotrophic and autotrophic denitrification technologies,including sulfur-based,hydrogen-based,and iron-based autotrophic processes.Particular attention is given to the nitrogen removal potential,reaction mechanisms,and dominant microbial community characteristics of sulfur autotrophic-heterotrophic synergistic denitrification systems.Furthermore,four future research directions are proposed:elucidation of microbial community structure and functional mechanisms;optimization of operational parameters and control strategies;development of intelligent system management;and expanded utilization of natural carbon sources as electron donors.These perspectives aim to promote theoretical innovation and facilitate the practical engineering application of advanced denitrification technologies.