Simultaneous Short-Cut Nitrification-Denitrification Phosphorus Removal Granules Induced by Phosphorus Removal Granules

被引：1

作者：

Li D. ^{[1
]}

Liu B. ^{[1
]}

Wang W.-Q. ^{[1
]}

Zhang J. ^{[1
,2
]}

机构：

[1] Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing

[2] State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin

来源：

Huanjing Kexue/Environmental Science | 2020年 / 41卷 / 02期

关键词：

Aeration intensity; Aeration time; Denitrifying phosphorus removal; Nitrogen and phosphorus removal; Phosphorus removal granules;

D O I：

10.13227/j.hjkx.201909108

中图分类号：

学科分类号：

摘要：

This paper investigated domestic sewage with a low C/N ratio. Mature phosphorus removal granules were inoculated to cultivate granules with a simultaneous short-cut nitrification and denitrification function. The characteristics of nitrogen and phosphorus removal of this process were analyzed. Results show that AOB can be enriched by prolonging the sludge age for 30 days with an aeration intensity of 5 L•(h•L)-1and shorter aeration time (140 min), whereas the simultaneous nitrification and denitrification ability could not be improved. The nitrogen loss increased at the aerobic time when aeration intensity was reduced by 3.5 L•(h•L)-1 and aeration time was prolonged by 200 min. The aeration time was further optimized to restrain the transformation of NO2 - to NO3 -, and finally the effluent of TP<0.5 mg•L-1and TN<15 mg•L-1. During the process of the system function transformation from phosphorus removal to nitrogen and phosphorus removal, the phosphorus release decreased, however PAOs still played a dominant role (60%) in the process of internal carbon storage. Batch experiments showed that DPAOs that can utilize nitrite as an electron acceptor accounts for 52.43% in the total PAOS, which alleviated the pressure of the carbon source and improved the simultaneous nitrogen and phosphorus removal. © 2020, Science Press. All right reserved.

引用

页码：867 / 875

页数：8

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