Nitrite soaking pretreatment induced initial denitrifying nitrite accumulation.

Partial denitrification (PD) could be another method for obtaining nitrite. However, PD startup takes a long time limiting its investigation and application. This study proposed nitrite soaking as a pretreatment method for starting PD. Results showed that denitrifying nitrite accumulation (4.20 mg/L) emerged after previously soaking by 10 mg/L nitrite for 9 h. When the duration was 6 h, comparing different soaked nitrite concentrations, the highest denitrifying nitrite accumulation amount (4.92 mg/L) was obtained in the 20 mg/L group. Nevertheless, high pH of 9 and frequent feeding could further advantage denitrifying nitrite accumulation. Pretreatment as a disturbance would impel the microbial community to change from complete denitrification towards PD. Copyright © 2023 Elsevier Ltd. All rights reserved.

Citation

Ji Zhao, Yuzhe Wu, Jimiao Wang, Ruihuan Gu, Zhigang Ding, Zhen Liu, Yan Zhang, Deshuang Yu, Xiaoxia Wang. Nitrite soaking pretreatment induced initial denitrifying nitrite accumulation. Bioresource technology. 2023 Nov;387:129605

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PMID: 37544538

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