Achieving deep-level nutrient removal via combined denitrifying phosphorus removal and simultaneous partial nitrification-endogenous denitrification process in a single-sludge sequencing batch reactor

2019 ◽  
Vol 289 ◽  
pp. 121690 ◽  
Author(s):  
Shiming Du ◽  
Deshuang Yu ◽  
Ji Zhao ◽  
Xiaoxia Wang ◽  
Chunxue Bi ◽  
...  
Keyword(s):  
Nutrient Removal ◽  
Phosphorus Removal ◽  
Sequencing Batch Reactor ◽  
Deep Level ◽  
Batch Reactor ◽  
Partial Nitrification ◽  
Denitrifying Phosphorus Removal ◽  
Denitrification Process

Denitrifying phosphorus removal by anaerobic/anoxic sequencing batch reactor

2001 ◽  
Vol 43 (3) ◽  
pp. 139-146 ◽  
Author(s):  
W. J. Ng ◽  
S. L. Ong ◽  
J. Y. Hu
Keyword(s):  
Removal Efficiency ◽  
Electron Acceptor ◽  
Phosphorus Removal ◽  
Sequencing Batch Reactor ◽  
Phosphate Uptake ◽  
Batch Reactor ◽  
Anoxic Condition ◽  
Simultaneous Presence ◽  
Denitrifying Phosphorus Removal ◽  
Batch Tests

Denitrifying phosphorus removal was verified in a laboratory anaerobic/anoxic Sequencing Batch Reactor (A/A SBR) for a period of 18 months. The results obtained demonstrated the ability of the anaerobic/anoxic strategy to enrich the growth of denitrifying phosphorus bacteria (DPB) capable of taking up phosphate under anoxic conditions by using nitrate as the electron acceptor. Phosphorus removal efficiency ranging from 40-100% could be attained in an A/A SBR system. Simultaneous anoxic phosphate uptake and biological denitrification under anaerobic/anoxic condition occurred in this system. Batch tests showed, however, that simultaneous presence of carbon and nitrate would be detrimental to denitrifying phosphorus removal. Results of bacteria studies suggested that three denitrifying isolates had aerobic phosphorus removing ability.

Biological denitrifying phosphorus removal in SBR: effect of added nitrate concentration and sludge retention time

2001 ◽  
Vol 43 (3) ◽  
pp. 191-194 ◽  
Author(s):  
M. Merzouki ◽  
N. Bernet ◽  
J.-P. Deigenès ◽  
R. Moletta ◽  
M. Benlemlih
Keyword(s):  
Retention Time ◽  
Phosphorus Removal ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Synthetic Wastewater ◽  
Biological Phosphorus Removal ◽  
Denitrifying Phosphorus Removal ◽  
Sludge Retention Time ◽  
Two Parameters ◽  
Biological Phosphorus

Optimizing anoxic biological phosphorus removal in the anaerobic-anoxic sequencing batch reactor (A2 SBR) was observed to depend on two parameters: the amount of added nitrate and the sludge retention time (SRT). The concentration of 120 mg N-NO3 · l-1 in the anoxic medium and the SRT of 15 days were determined as optimal for a complete phosphorus removal in the A2 SBR. The reactor was supplied with synthetic wastewater containing 800 mg COD.l-1 acetic acid, 240 mg N-NH4·l-1 and 30 mg P-PO4·l-1. This study was completed by microscopic observations which revealed three morphological types of phosphate-accumulating bacteria (PAB).

Biological phosphorus removal with nitrite as election acceptor

2006 ◽  
Vol 53 (9) ◽  
pp. 185-191 ◽  
Author(s):  
Xiaoling Zhang ◽  
Zhiying Wang ◽  
Qing Zhao
Keyword(s):  
Phosphorus Removal ◽  
Sequencing Batch Reactor ◽  
Batch Reactor ◽  
Granular Sludge ◽  
Biological Phosphorus Removal ◽  
Denitrifying Phosphorus Removal ◽  
Operational Conditions ◽  
Feed Mode ◽  
Continuous Feed ◽  
Biological Phosphorus

Biological phosphorus removal was studied in a sequencing batch reactor (SBR). The results showed that nitrite could be used as electron acceptor in denitrifying phosphorus removal. Feed mode of nitrite had significant influence on denitrifying phosphorus removal. Anoxic phosphorus assimilation rate could reach 10.44 mgP/gSS.h and the percentage of anoxic phosphorus assimilation amount was more than 97% with continuous feed mode. Granular sludge with denitrifying phosphorus removal activity was found in the SBR. The effects of different operational conditions, such as COD loading, settling time, HRT etc., on the formation of granules were also studied.

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