James Susan N, Vijayanandan Arya
Department of Civil Engineering, Indian Institute of Technology, Delhi, 110016, India.
Biodegradation. 2023 Apr;34(2):103-123. doi: 10.1007/s10532-023-10015-8. Epub 2023 Mar 10.
Simultaneous Nitrification and Denitrification (SND) is a promising process for biological nitrogen removal. Compared to conventional nitrogen removal processes, SND is cost-effective due to the decreased structural footprint and low oxygen and energy requirements. This critical review summarizes the current knowledge on SND related to fundamentals, mechanisms, and influence factors. The creation of stable aerobic and anoxic conditions within the flocs, as well as the optimization of dissolved oxygen (DO), are the most significant challenges in SND. Innovative reactor configurations coupled with diversified microbial communities have achieved significant carbon and nitrogen reduction from wastewater. In addition, the review also presents the recent advances in SND for removing micropollutants. The micropollutants are exposed to various enzymes due to the microaerobic and diverse redox conditions present in the SND system, which would eventually enhance biotransformation. This review presents SND as a potential biological treatment process for carbon, nitrogen, and micropollutant removal from wastewater.
同步硝化反硝化（SND）是一种很有前景的生物脱氮工艺。与传统的脱氮工艺相比，SND具有成本效益，因为其占地面积减小，对氧气和能源的需求较低。这篇综述总结了目前关于SND在基本原理、机制和影响因素方面的知识。在絮体内部创造稳定的好氧和缺氧条件以及优化溶解氧（DO）是SND面临的最重大挑战。创新的反应器配置与多样化的微生物群落相结合，已实现了显著的废水碳氮减排。此外，该综述还介绍了SND在去除微污染物方面的最新进展。由于SND系统中存在的微需氧和多样的氧化还原条件，微污染物会接触到各种酶，这最终会增强生物转化。这篇综述将SND作为一种潜在的生物处理工艺，用于去除废水中的碳、氮和微污染物。
