Effect of Initiative pH Value on Accumulation of Nitrite During the Process of Rapid Start-up of Partial Nitrification

WANG Shu-ying; LI Lun; LI Ling-yun; GU Sheng-bo; YANG Qing

Journal of Beijing University of Technology > 2011 > 37(7): 1067-1072.

WANG Shu-ying, LI Lun, LI Ling-yun, GU Sheng-bo, YANG Qing. Effect of Initiative pH Value on Accumulation of Nitrite During the Process of Rapid Start-up of Partial Nitrification[J]. Journal of Beijing University of Technology, 2011, 37(7): 1067-1072.

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Effect of Initiative pH Value on Accumulation of Nitrite During the Process of Rapid Start-up of Partial Nitrification

Key Laboratory of Beijing for Water Quality Science and Water Environmental Recovery Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China

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Received Date: May 31, 2009
Available Online: November 18, 2022

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Abstract

In order to realize rapid start-up of partial nitrification by using real domestic wastewater,the experiment of three same sequencing batch reactors(SBR) and the temperature is 25 ℃,the dissolved oxygen (DO) is 2.0 mg/L,the aerobic time is respectively TT/2、3T/4、7T/8(T was the time from the beginning of aerobic to the appearance of the "ammonia valley"),is conducted to investigate nitrite accumulation.The nitrite accumulation ratios(nar) were increased by 50%、47%、70% in the three reactors when the initiative pH value is 7.7-8.0,the nar increases fastest in which the aerobic time is 7/8T,the partial nitrification is achieved.The nar can be increased by appropriate aerobic time,by the effect of the pH value on the configuration of the nitrifying bacteria and by the inhibition of NOB to free ammonia.
- SBR,
- rapid start-up,
- partial nitrification,
- free ammonia

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Effect of Initiative pH Value on Accumulation of Nitrite During the Process of Rapid Start-up of Partial Nitrification

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