National Engineering Laboratory for Industrial Wastewater Treatment, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, China.
State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment, South China Institute of Environmental Sciences, Minister of Environmental Protection, Guangzhou, China.
Biodegradation. 2021 Jun;32(3):229-249. doi: 10.1007/s10532-021-09938-x. Epub 2021 Apr 6.
To further reduce the energy consumption in the wastewater biological nitrogen removal process, partial nitrification and its integrated processes have attracted increasing attentions owing to their economy and efficiency. Shortening the steps of ammonia oxidation to nitrate saves a large amount of aeration, and the accumulated nitrite could be reduced by denitritation or anammox, which requires less electron donors compared with denitrification. Therefore, the strategies through mainstream suppression and sidestream inhibition for the achievement of partial nitrification in recent years are reviewed. Specifically, the enrichment strategies of functional microorganisms are obtained on the basis of their growth and metabolic characteristics under different selective pressures. Furthermore, the promising developments, current application bottlenecks and possible future trends of some biological nitrogen removal processes integrating partial nitrification are discussed. The obtained knowledge would provide a new idea for the fast realization of economic, efficient and long-term stable partial nitrification and biological nitrogen removal process.
为了进一步降低废水生物脱氮过程的能耗，部分硝化及其集成工艺因其经济性和高效性而受到越来越多的关注。将氨氧化步骤缩短为硝酸盐可节省大量曝气，而积累的亚硝酸盐可通过反硝化或厌氧氨氧化还原，与反硝化相比，需要的电子供体更少。因此，近年来通过主流抑制和支流抑制实现部分硝化的策略得到了综述。具体来说，根据不同选择压力下功能微生物的生长和代谢特点，获得了富集功能微生物的策略。此外，还讨论了一些集成部分硝化的生物脱氮工艺的有前途的发展、当前应用瓶颈和可能的未来趋势。所获得的知识将为快速实现经济、高效和长期稳定的部分硝化和生物脱氮过程提供新的思路。
