Roles of Fe(II), Fe(III) and Fe0 in denitrification and anammox process: Mechanisms, advances and perspectives

Zhang, Qianqian; Feng, Ze-Tong; Zhou, Jian; Ma, Xin; Sun, Yingjun; Liu, Jin-Ze; Zhao, Jianqiang; Jin, Ren‐Cun

doi:10.1016/j.jwpe.2023.103746

Cited by 15 publications

(2 citation statements)

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“…In the existing research, the addition of exogenous substances (e.g., Fe, EPS, etc.) effectively solved the problems of substrate concentration inhibition and the slow rate of anammox [12,57,58]. However, inhibition of high-strength wastewater resulting in an increase in effluent concentration has not been addressed in this study.…”

Section: Discussion Of Factors Influencing Anammox Enrichmentmentioning

confidence: 99%

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Enrichment of Anammox Bacteria Using Anammox Sludge as a Primer Combined with Ordinary Activated Sludge

Liu

Hu²,

Wang

et al. 2023

Sustainability

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Anaerobic ammonia oxidation bacteria (AnAOB) are difficult to cultivate due to their long start-up time and sensitivity to environmental conditions. In this study, anammox granular sludge was cultured with ordinary activated sludge under influent dissolved oxygen concentrations of 6–8 mg/L, successfully enriching AnAOB. The presence of multiple microorganisms in the activated sludge enabled the anammox system to resist the unfavorable influent environment and sustain system stability. The total nitrogen removal rate reached a maximum of 81%, and the TN effective load increased from 0.1 to 1.5 kg N/m3/d. The results showed that the dissolved oxygen present in the influent did not lead to a breakdown in the anammox system. The protein in the sludge extracellular polymeric substances played an important role in the enrichment of AnAOB, and the sludge settling performance at the bottom of the reactor was better than that at the top of the reactor, with protein/polysaccharide in the range of 5–6.3. Candidatus brocadia and Candidatus kuenenia were the main anammox functional bacteria in the system. On 153 d of reactor operation, their relative abundances were 8.51 and 5.68%, respectively. This study shows that microorganisms in activated sludge contribute to the stability of the anammox system when the influent conditions are appropriate. This provides a new idea for the rapid start-up of the anammox system and enrichment of AnAOB.

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Section: Discussion Of Factors Influencing Anammox Enrichmentmentioning

confidence: 99%

“…It is possible that the high concentration of substrate entering the system was easily and rapidly absorbed by microorganisms. To date, many studies have been conducted to reduce the inhibition of anammox bacteria through enrichment and to accelerate system start-up [14,57].…”

Section: Effect Of Cod Nhmentioning

confidence: 99%