Influence of Light Irradiation on Nitrification in Microalgal-Bacterial Systems for Treating Wastewater
文献类型： 外文期刊
作者： Lu, Shimin 1 ; Li, Yayuan 1 ; Liu, Xingguo 1 ; Cheng, Guofeng 1 ; Yuan, Zehui 1 ; Wu, Fan 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Fishery Machinery & Instrument Res Inst, Shanghai 200092, Peoples R China
2.Minist Agr & Rural Affairs, Key Lab Aquaculture Facil Engn, Shanghai, Peoples R China
3.Shanghai Ocean Univ, Coll Fisheries & Life Sci, Shanghai 201306, Peoples R China
关键词： photoinhibition; light resistance; ammonia-oxidizing bacteria (AOB); nitrite-oxidizing bacteria (NOB); nitrifying granular
期刊名称：PROCESSES （ 影响因子：3.5； 五年影响因子：3.4 ）
ISSN：
年卷期： 2023 年 11 卷 12 期
页码：
收录情况： SCI
摘要： The use of bacterial and microalgal consortia to remove nitrogen from wastewater has garnered attention as a potential alternative to conventional systems. This approach not only reduces energy consumption but also aids in nutrient recovery. Light is essential for algae photosynthesis; however, nitrifying bacteria are also influenced by light radiation. This mini-review summarizes the current knowledge concerning photoinhibition, the light stimulation of ammonia-oxidizing bacteria (AOB), resistance to light radiation, the implementation of microalgal-bacterial systems, and the possible mechanisms involved. Nitrosomonadaceae AOB and Nitrospiraceae nitrite-oxidizing bacteria (NOB) often coexist in a microalgal-bacterial system. Studies have suggested that AOB can tolerate light radiation at 200 mu mol m-2 center dot s-1 in microalgal-bacterial systems, whereas NOB are almost completely suppressed, which can result in partial nitrification in the bioreactor. An appropriate light level can stimulate AOB growth in microalgal-bacterial granular reactors and may improve algae metabolic activity. Granular sludges or artificial "light-shielding hydrogel" could effectively protect nitrifying bacteria from light intensities up to 1600 mu mol m-2 center dot s-1 in wastewater treatment reactors. Microalgal-bacterial systems along with the associated "algal shading effect" have been widely used in pond aquaculture. This approach minimizes the need for costly mechanical aeration through photo-oxygenation and facilitates nutrient recovery by filter-feeding fish.
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