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Huan Jing Ke Xue. 2017 Nov 8;38(11):4656-4663. doi: 10.13227/j.hjkx.201704277.

[Effects of Temperature on Shortcut Nitrification and Nitrification Activity of Nitrification in an Intermittent Aeration Sequencing Batch Reactor].

[Article in Chinese]

Author information

1
School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China.
2
National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing 100124, China.

Abstract

Real domestic sewage was treated with sequencing batch reactors (SBR). The aerobic/anoxic modes were alternated 4 times at 30℃ and 7 times at 18℃ in a single-cycle, respectively, and the ratio of aerobic/anoxic cycles was 30 min/30 min. The influent concentration of ammonia and nitrite was 61.44 mg·L-1 and 0.77 mg·L-1, respectively. After the experiments were run for 61 and 90 cycles, the effluent of the ammonia was 0.68 mg·L-1 and 1.28 mg·L-1 and the removal rate for ammonia was 98.94% and 99.57%, respectively. The nitrite concentrations were 20.57 mg·L-1 and 20.18 mg·L-1, and the nitrite accumulation rate reached 95.92% and 99.58%, respectively. During shortcut nitrification, the activity of the ammonia oxidizing bacteria (AOB) increased gradually before finally stabilizing at 100.00%, however the activity of nitrite oxidizing bacteria (NOB) increased first and then decreased gradually, the activity of AOB exceeded NOB at 32 and 74 cycles respectively, where the AOB became the dominant bacteria and the activity of NOB was completely inhibited at 61 and 90 cycles.

KEYWORDS:

intermittent aeration; nitrification activity; sequencing batch reactor; shortcut nitrification; temperature

PMID:
29965410
DOI:
10.13227/j.hjkx.201704277
[Indexed for MEDLINE]

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