Nitric oxide and nitrous oxide production in anaerobic/anoxic nitrite-denitrifying phosphorus removal process: effect of phosphorus concentration.
作者： Sha Wang , Jianqiang Zhao , Xiaoqian Ding , Xiaoling Li
DOI: 10.1007/S11356-020-10499-4
关键词:
摘要: Nitric oxide (NO) and nitrous (N2O) production in biological nutrient removal has been studied widely due to the strong negative effects on environment. Nitrite-denitrifying phosphorus (N-DPR), as a significant source of NO N2O production, received great attention. However, mechanism at different concentrations is not well understood. Therefore, this study was conducted investigate effect concentration pollutant removal, during N-DPR process. The results showed that efficiency improved with increase concentration, which caused by enrichment denitrifying accumulating organisms (DPAOs) high concentration. High observed 0.5 mg L-1, mainly attributed slow recovery reductase activity low abundance DPAOs. maximal accumulation 31.45 L-1 also achieved L-1. possible reason fewer poly-β-hydroxyalkanoates (PHAs) were synthesized glycogen (GAOs) could intensify electron competition among reductases. In addition, free acid (FNA) inhibition another for production.
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