Abstract:

Sulfur iron ore mediated autotrophic denitrification is an economic, efficient and green biological treatment technology with the advantages of saving external organic carbon sources, removing nitrogen and phosphorus simultaneously, and reducing sludge production and CO₂ emissions, which is the frontier and focus of wastewater treatment in recent years. This paper systematically summarizes the phenomenon of sulfur iron ore mediated field autotrophic denitrification in natural habitats, and the current status of sulfur iron ore supports biological treatment technologies; analyzes the effects of key factors such as their physicochemical properties, dosage, operation pH and temperature on systems’ performance; describes functional microorganisms of sulfur/iron oxidation coupled with nitrate reduction and their potential biochemical mechanisms; discusses the development difficulties such as bioavailability of sulfur iron ore and the inhibition of iron sediment. And finally the corresponding potential countermeasures are proposed. In summary, this paper outlined four aspects of the current status, influencing factors, biological mechanism, and development difficulties, which improves the understanding of sulfur iron ore mediated autotrophic denitrification and thus promotes its application in wastewater treatment.

Key words: sulfur iron ore, autotrophic denitrification, influencing factors, microbial mechanism

摘要：

硫铁矿介导的自养反硝化是一种经济、高效和绿色的生物处理技术，具有节省外加有机碳源、同步脱氮除磷、减少污泥产量和CO₂排放量等优势，是近年来污水处理领域研究的前沿和焦点。本文系统总结了自然生境中硫铁矿介导的自养反硝化现象以及基于硫铁矿构建的生物处理技术现状；分析了硫铁矿特性、添加量、pH以及温度等关键因素对其效能的影响；阐述了硫铁氧化耦合硝氮还原的功能微生物及其生物化学机制；探讨了硫铁矿生物利用性和铁沉积物抑制作用等关键难点，并提出了相应的潜在对策。综上所述，本文概述了硫铁矿介导的自养反硝化技术的现状、影响因素、生物机制以及关键难点四方面内容，以促进对硫铁矿介导的自养反硝化的深度理解，进而推动其在污水处理领域的实际应用。

关键词: 硫铁矿, 自养反硝化, 影响因素, 生物机制