EFFECT OF INSTANTANEOUS NH<sub>4</sub><sup>+</sup>-N SHOCK ON POLLUTANTS REMOVAL IN A MICRO PRESSURE REACTOR

WANG Fan; LIU Wanqi; JIANG Weiqing; SUN Xuejian; WANG Xichao; BIAN Dejun

doi:10.13205/j.hjgc.202210008

Volume 40 Issue 10

Oct. 2022

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WANG Fan, LIU Wanqi, JIANG Weiqing, SUN Xuejian, WANG Xichao, BIAN Dejun. EFFECT OF INSTANTANEOUS NH4+-N SHOCK ON POLLUTANTS REMOVAL IN A MICRO PRESSURE REACTOR[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(10): 55-61. doi: 10.13205/j.hjgc.202210008

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WANG Fan, LIU Wanqi, JIANG Weiqing, SUN Xuejian, WANG Xichao, BIAN Dejun. EFFECT OF INSTANTANEOUS NH₄⁺-N SHOCK ON POLLUTANTS REMOVAL IN A MICRO PRESSURE REACTOR[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(10): 55-61. doi: 10.13205/j.hjgc.202210008

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EFFECT OF INSTANTANEOUS NH₄⁺-N SHOCK ON POLLUTANTS REMOVAL IN A MICRO PRESSURE REACTOR

doi: 10.13205/j.hjgc.202210008

WANG Fan^1,2,
LIU Wanqi^1,2,
JIANG Weiqing^1,2,
SUN Xuejian^1,2,
WANG Xichao²,
BIAN Dejun^{1,2
,
,}

1. School of Water Concenancy and Environmental Engineering, Changchun Institute of Technology, Changchun 130012, China;
2. Key Laboratory of Urban Sewage Treatment of Jilin Province, Changchun Institute of Technology, Changchun 130012, China

Received Date: 2021-10-10

Abstract

Abstract

The effect of NH₄⁺-N shock on pollutants' removal efficiency of the micro-pressure reactor (MPR) was investigated by increasing the single cycle instantaneous influent NH₄⁺-N concentration to 40 and 50 mg/L and shocking the MPR. The results showed that the MPR had a good pollutant removal effect under conventional load. The degradation epoch of the shock cycle showed that in the influent 40 mg/L NH₄⁺-N shock cycle, the influent concentrations of COD, NH₄⁺-N, and TP were 192.58, 40.96, and 2.52 mg/L, and the effluent concentrations were 38.16, 0.70, and 0.26 mg/L, respectively, with no significant changes in the removal effect, and the effluent TN concentration increased to 16.04 mg/L. When the NH₄⁺-N concentration shock was increased to 50 mg/L, the NH₄⁺-N degradation rate remained unchanged and the denitrification rate increased during the impact cycle, and the effluent NH₄⁺-N and TN concentrations increased to 4.95 and 17.62 mg/L. TN degradation was mainly affected by the lack of carbon source, and there was no change in TP removal effect. The above results showed that the nitrogen removal performance of the MPR system recovered within 1 cycle after the impact of NH₄⁺-N, indicating a reversible short-term effect on the nitrogen removal system. An irreversible long-term effect on the phosphorus removal system was observed.
- NH₄⁺-N concentration,
- instant shock,
- MPR,
- removal effect

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References(32)

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