Abstract

Autotrophic nitrogen removal couple process based on anaerobic ammonium oxidation (Anammox) has been applied to treat various high-ammonia and low-carbon wastewater for its advantageous ability to remove nitrogen. However, high concentrations of ${\mathrm{NO}}_3^{-}$-N in the effluent is a drawback that prevents the total nitrogen from meeting the discharge standard. For this reason, coupling sulfur autotrophic denitrification (SADN) with Anammox for the advanced treatment of ${\mathrm{NO}}_3^{-}$-N to achieve a completely autotrophic biological nitrogen removal process that is independent of organic matter has become a major focus of research in recent years. To reduce ${\mathrm{SO}}_4^{\mathrm{2-}}$-S in the SADN process, the short-cut SADN (SSADN) process was pioneered for controlling ${\mathrm{NO}}_3^{-}$-N reduction in the ${\mathrm{NO}}_2^{-}$-N phase. This method also serves as an efficient anaerobic autotrophic process that simultaneously removes biological nitrogen from wastewater containing ${\mathrm{NH}}_4^{+}$-N and ${\mathrm{NO}}_3^{-}$-N. This article reviews the control parameters of SSADN and the forms of coupling with Anammox, analyze the directional transformation of nitrogen and sulfur in the coupling process and the complex competition of substrates, and finally evaluate application bottlenecks that limit its industrialization, which are necessary to address for furthering the development of this process.

摘要

基于厌氧氨氧化（Anammox）的自养脱氮耦合工艺以其优越的脱氮能力被应用于各种高氨、低碳废水的处理。然而，高浓度的${\mathrm{不}}_3^{-}$流出物中的-N 是阻碍总氮达到排放标准的缺陷。为此，硫自养反硝化（SADN）与厌氧氨氧化结合用于深度处理${\mathrm{不}}_3^{-}$-N实现不依赖有机物的完全自养生物脱氮工艺成为近年来的主要研究热点。减少${\mathrm{所以}}_4^{\mathrm{2-}}$-S 在SADN流程中，首创了快捷SADN（SSADN）流程，用于控制${\mathrm{不}}_3^{-}$-N 减少${\mathrm{不}}_2^{-}$-N 阶段。该方法还可以作为一种高效的厌氧自养工艺，同时从含有${\mathrm{NH}}_4^{+}$-N 和${\mathrm{不}}_3^{-}$-N。本文回顾了SSADN的控制参数和与Anammox的偶联形式，分析了偶联过程中氮硫的定向转化和底物的复杂竞争，最后评估了限制其产业化的应用瓶颈，需要解决这些问题。以促进这一过程的发展。