RAPID START-UP AND STABILITY OF PARTIAL NITRIFICATION FOR DOMESTIC SEWAGE

ZHANG Xinwen; WANG Rongzhen; FENG Chengye; ZHANG Wenzhi; XU Zhenghe

doi:10.13205/j.hjgc.202210002

Volume 40 Issue 10

Oct. 2022

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ZHANG Xinwen, WANG Rongzhen, FENG Chengye, ZHANG Wenzhi, XU Zhenghe. RAPID START-UP AND STABILITY OF PARTIAL NITRIFICATION FOR DOMESTIC SEWAGE[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(10): 9-14. doi: 10.13205/j.hjgc.202210002

Citation:

ZHANG Xinwen, WANG Rongzhen, FENG Chengye, ZHANG Wenzhi, XU Zhenghe. RAPID START-UP AND STABILITY OF PARTIAL NITRIFICATION FOR DOMESTIC SEWAGE[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(10): 9-14. doi: 10.13205/j.hjgc.202210002

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RAPID START-UP AND STABILITY OF PARTIAL NITRIFICATION FOR DOMESTIC SEWAGE

doi: 10.13205/j.hjgc.202210002

School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China

Received Date: 2021-08-09

Abstract

Abstract

In this paper, domestic sewage with low carbon to nitrogen ratio was taken as the research object, and the SBR reactor was used to quickly start the partial nitrification by reducing the stirring time in aerobic stage. The nitrogen removal law of typical operating cycles was studied, and the realization of partial nitrification was further verified from the perspective of microorganisms. After reducing the aerobic stirring time by 50%, the nitrite accumulation rate (NAR) increased from 36.05% to 54.06%. After stopping aerobic stirring, the NAR increased to 90.17%, and it continued to operate stably in this state. In a typical operation cycle, SBR had a good ammonia nitrogen removal effect and high NAR. The removal rate of NH₄⁺-N reached 89.46% and the NAR of effluent reached 89.13%. The detection result of quantitative real-time PCR (q-PCR) showed that after 140 days of population optimization, the contents of ammonia oxidizing bacteria (AOB) and nitrite oxidizing bacteria (NOB) in the sludge accounted for 70.3% and 2.1% of the total bacteria, respectively. The realization of partial nitrification was verified from the perspective of molecular biology.
- domestic sewage,
- SBR,
- partial nitrification,
- rapid start-up,
- microbial community

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References(42)

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