Enhanced Biological Nutrients Removal in Modified Step-feed Anaerobic/Anoxic/Oxic Process

王伟; 王淑莹; 彭永臻; 张善锋; 殷芳芳

doi:10.1016/S1004-9541(08)60285-2

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Enhanced Biological Nutrients Removal in Modified Step-feed Anaerobic/Anoxic/Oxic Process

Updated：2026-01-06

- Enhanced Biological Nutrients Removal in Modified Step-feed Anaerobic/Anoxic/Oxic Process
- Chinese Journal of Chemical Engineering Vol. 17, Issue 5, Pages: 840-848(2009)
- Affiliations：
  
  1. Key Laboratory of Beijing for Water Quality Science and Water Environmental Recovery Engineering, Beijing University of Technology,Beijing,China,100124
  2. Beijing Municipal Engineering Professional Design Institute Co. Ltd,Beijing,China,100037
- Author bio：
- Funds：
- DOI：10.1016/S1004-9541(08)60285-2
  CLC：
- Published：2009
- Accepted：
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WANG Wei, WANG Shuying, PENG Yongzhen, ZHANG Shanfeng, YIN Fangfang. Enhanced Biological Nutrients Removal in Modified Step-feed Anaerobic/Anoxic/Oxic Process[J]. , 2009, 17(5): 840-848.
DOI：

WANG Wei, WANG Shuying, PENG Yongzhen, ZHANG Shanfeng, YIN Fangfang. Enhanced Biological Nutrients Removal in Modified Step-feed Anaerobic/Anoxic/Oxic Process[J]. , 2009, 17(5): 840-848. DOI： 10.1016/S1004-9541(08)60285-2.

摘要

In order to enhance phosphorus removal in traditional step-feed anoxic/oxic nitrogen removal process

a modified pilot-scale step-feed anaerobic/anoxic/oxic (SFA

/O) system was developed

which combined a reactor similar to UCT-type configuration and two-stage anoxic/oxic process.The simultaneous nitrogen and phosphorus removal capacities and the potential of denitrifying phosphorus removal

in particular

were investigated with four different feeding patterns using real municipal wastewater.The results showed that the feeding ratios(

)in the first stage determined the nutrient removal performance in the SFA

/O system.The average phosphorus removal efficiency increased from 19.17% to 96.25% as

was gradually increased from run 1 to run 4

but the nitrogen removal efficiency exhibited a different tendency

which attained a maximum 73.61% in run 3 and then decreased to 59.62% in run 4.As a compromise between nitrogen and phosphorus removal

run 3 (

=0.45

total

) was identified as the optimal and stable case with the maximum anoxic phosphorus uptake rate of 1.58mg·(g MLSS)

-1

·h

-1

.The results of batch tests showed that ratio of the anoxic phosphate uptake capacity to the aerobic phosphate uptake capacity increased from 11.96% to 36.85% with the optimal influent feeding ratio to the system in run 3

which demonstrated that the denitrifying polyP accumulating organisms could be accumulated and contributed more to the total phosphorus removal by optimizing the inflow ratio distribution.However

the nitrate recirculation to anoxic zone and influent feeding ratios should be carefully controlled for carbon source saving.

Abstract

In order to enhance phosphorus removal in traditional step-feed anoxic/oxic nitrogen removal process

a modified pilot-scale step-feed anaerobic/anoxic/oxic (SFA

/O) system was developed

in particular

were investigated with four different feeding patterns using real municipal wastewater.The results showed that the feeding ratios(

)in the first stage determined the nutrient removal performance in the SFA 2/O system.The average phosphorus removal efficiency increased from 19.17% to 96.25% as

was gradually increased from run 1 to run 4

but the nitrogen removal efficiency exhibited a different tendency

which attained a maximum 73.61% in run 3 and then decreased to 59.62% in run 4.As a compromise between nitrogen and phosphorus removal

run 3 (

=0.45

total

) was identified as the optimal and stable case with the maximum anoxic phosphorus uptake rate of 1.58mg·(g MLSS)

-1

·h

-1

which demonstrated that the denitrifying polyP accumulating organisms could be accumulated and contrib

uted more to the total phosphorus removal by optimizing the inflow ratio distribution.However

the nitrate recirculation to anoxic zone and influent feeding ratios should be carefully controlled for carbon source saving.

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