In-situ Phosphorus Removal Activity and Impact of the Organic Matter Concentration on Denitrifying Phosphorus Removal in Sludge Aggregates

被引：0
|
作者：
Lü Y.-T. [1 ,2 ]
Jiang X.-T. [1 ,2 ]
Tu Y. [1 ,2 ]
Wang X.-D. [1 ,2 ]
Pan Y.-B. [3 ]
Liu S. [3 ]
Cui S.-K. [3 ]
Wang L. [1 ,2 ]
机构：
[1] School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an
[2] Key Laboratory of Membrane Separation of Shaanxi Province, Research Institute of Membrane Separation Technology of Shaanxi Province, Xi'an
[3] Shaanxi Modern Architecture Design & Research Institute, Xi'an
来源：
Huanjing Kexue/Environmental Science | 2021年 / 42卷 / 05期
关键词：
Denitrifying phosphorus removal; Microelectrode; Net volume rate; Organic matter concentration; Sludge aggregates;
D O I：
10.13227/j.hjkx.202010109
中图分类号：
学科分类号：
摘要：
In this work, the redox potential, dissolved oxygen, and phosphate microelectrodes were used to quantitatively study the in-situ activity of dephosphorization bacteria and the impact of the organic matter concentration on denitrifying phosphorus removal in sludge aggregates in a sequencing batch reactor. The results showed that the maximum net volume release rate of phosphorus was 3.29 mg•(cm3•h)-1 in the initial anaerobic sludge aggregates, which was approximately 3 times the maximum net volume uptake rate of phosphorus at the initial anoxic stage. The release rate of phosphorus clearly decreased at the final anaerobic stage, and the maximum net volume release rate of phosphorus was only half of that at the initial anaerobic stage. At the final anoxic stage, the maximum net volume uptake rate of phosphorus decreased to 0.14 mg•(cm3•h)-1, and the phenomenon of secondary phosphorus release occurred in the deep area below 1 800 μm. When the concentration of COD decreased from 350 mg•L-1 to 250 mg•L-1 and 150 mg•L-1, the maximum net volume release rate of phosphorus of dephosphorization bacteria decreased from 3.27 mg•(cm3•h)-1 to 2.44 mg•(cm3•h)-1 and 2.01 mg•(cm3•h)-1, respectively, and the rapid uptake area of phosphorus narrowed to the surface of the sludge aggregates. © 2021, Science Press. All right reserved.
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页码：2396 / 2401
页数：5
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