Enhancement and mechanisms of iron-assisted anammox process

Dai, Ben; Yang, Yifeng; Wang, Zuobing; Wang, Jiangming; Yang, Lin; Cai, Xiang; Wang, Zhenyu; Xia, Siqing

doi:10.1016/j.scitotenv.2022.159931

Cited by 36 publications

(17 citation statements)

References 133 publications

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“…Iron was considered an essential element of the anammoxosome in AnAOB, the active zone in the catabolic process . Adequate iron supported the stable synthesis of heme c , providing favorable conditions for the growth of AnAOB .…”

Section: Resultsmentioning

confidence: 99%

“…Magnetic biochar achieved fast start-up, stable operation, and high nitrogen removal performance for anammox due to the presence of Fe. Fe could improve the survival environment of AnAOB while increasing its abundance and activity, stimulating the secretion of EPS, and expanding the nitrogen removal pathways …”

Section: Resultsmentioning

confidence: 99%

“…Iron was considered an essential element of the anammoxosome in AnAOB, the active zone in the catabolic process. 19 Adequate iron supported the stable synthesis of heme c, providing favorable conditions for the growth of AnAOB. 14 Xu et al 23 found that heme c increased with increasing concentrations of Fe 3 O 4 NPs, reaching a maximum (2.67 ± 0.05 μmol/g VSS) at 200 mg/L of Fe 3 O 4 NPs, which may be related to the release of Fe 2+ and Fe 3+ from Fe 3 O 4 NPs, with the released iron ions further involved in the anammox process.…”

Section: Heme Cmentioning

confidence: 99%

“…Fe could improve the survival environment of AnAOB while increasing its abundance and activity, stimulating the secretion of EPS, and expanding the nitrogen removal pathways. 19 3.2. Characteristics of Anammox Sludge.…”

Section: Influence Of Biochar On Anammox Start-upmentioning

confidence: 99%

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Rapid Start-Up and Long-Term Stability of Anammox with Magnetic Biochar Addition: Performance Improvement, Microbial Community, and Potential Mechanisms

An,

Chang,

Xie

et al. 2023

ACS EST Eng.

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Accelerating the start-up of anaerobic ammonium oxidation (anammox) is the primary condition for its large-scale application. Anammox with magnetic biochar took the shortest start-up time, reducing 15–24 days compared to the control blank (CK) and 6–26 days with pyrolytic biochar. FCS300 (magnetic biochar prepared at 300 °C) could produce the highest levels of heme c (0.123 μmol/g VSS). The extracellular polymeric substances (EPS) in FCS300 had the lowest R ct (12.6 kΩ) and a substantially higher electron-transfer capability (ETC). Candidatus jettenia was the main anammox bacteria (AnAOB) in reactors after the successful start-up, and its distribution was spatially variable on the suspended sludge and the biofilm of the biochar. The findings implied that magnetic biochar might improve electron transfer by shortening the anammox start-up time via an electron shuttle mechanism or direct interspecies electron transfer.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Heme Cmentioning

confidence: 99%

Section: Influence Of Biochar On Anammox Start-upmentioning

confidence: 99%

See 2 more Smart Citations

Rapid Start-Up and Long-Term Stability of Anammox with Magnetic Biochar Addition: Performance Improvement, Microbial Community, and Potential Mechanisms

An,

Chang,

Xie

et al. 2023

ACS EST Eng.

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“…Heme c was involved in anaerobic conversion of NH 4 + -N to N 2 in anammox process ( van Niftrik et al., 2008 ). Although Fe(II) showed higher bioavailability for anammox species ( Dai et al., 2022 ), soluble Fe(II) was often unstable and could be easily converted into Fe(III). Thus, Fe(III) was more suitable to supply anammox species for practical application.…”

Section: Introductionmentioning

confidence: 99%