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Huan Jing Ke Xue. 2017 Aug 8;38(8):3415-3421. doi: 10.13227/j.hjkx.201701185.

[Effect of Different TOC to NH4+-N Ratios on Nitrogen Removal Efficiency in the ANAMMOX Process].

[Article in Chinese]
Wang F1,2, Liu K1,2, Lin X1,2, Zhou Z1,2, Li X1,2, Huang Y1,2.

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School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China.
Institute of Environmental Biotechnology, Suzhou University of Science and Technology, Suzhou 215009, China.


The effect of the TOC to NH4+-N ratio on nitrogen removal rate in an ANAMMOX sequencing batch reactor was studied for the short term and long term. Short-term results showed the maximum TOC/NH4+-N that ANAMMOX could afford was 1.4. At the same time, the rate of nitrogen removal was 0.26 kg·(m3·d)-1. The maximum nitrogen removal rate of 0.34 kg·(m3·d)-1 was obtained when TOC/NH4+-N was less than 0.4 in the long-term experiment. Whereas the nitrogen removal rate of the reactor decreased continuously when TOC/NH4+-N exceeded 0.4, and it was difficult to recover the activity of the ANAMMOX bacteria in the short term. qPCR results showed that the amount of ANAMMOX bacteria dropped from 2.9×1011 copies·mL-1 to 3.15×1010 copies·mL-1 with the increase of organics. When TOC/NH4+-N exceeded 1.6, NH4+-N could hardly be removed by the ANAMMOX bacteria, which were severely inhibited. The number of denitrifying bacteria was 3.0×109 copies·mL-1; meanwhile, most of the NO2--N in the reactor was removed via denitrification.


ANAMMOX; TOC/NH4+-N; denitrification; organic matter; quantitative PCR

[Indexed for MEDLINE]

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