Comparison of different valent iron on anaerobic sludge digestion: Focusing on oxidation reduction potential, dissolved organic nitrogen and microbial community

Zecong Yu; Keke Xiao; Yuwei Zhu; Mei Sun; Sha Liang; Jingping Hu; Huijie Hou; Bingchuan Liu; Jiakuan Yang

doi:10.1007/s11783-021-1514-3

Comparison of different valent iron on anaerobic sludge digestion: Focusing on oxidation reduction potential, dissolved organic nitrogen and microbial community

Zecong Yu, Keke Xiao^*, Yuwei Zhu, Mei Sun, Sha Liang, Jingping Hu, Huijie Hou, Bingchuan Liu, Jiakuan Yang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

This study compared effects of three different valent iron (Fe⁰, Fe(II) and Fe(III)) on enhanced anaerobic sludge digestion, focusing on the changes of oxidation reduction potential (ORP), dissolved organic nitrogen (DON), and microbial community. Under the same iron dose in range of 0–160 mg/L after an incubation period of 30 days (d), the maximum methane production rate of sludge samples dosed with respective Fe⁰, Fe(II) and Fe(III) at the same concentration showed indiscernible differences at each iron dose, regardless of the different iron valence. Moreover, their behavior in changes of ORP, DON and microbial community was different: (1) the addition of Fe⁰ made the ORP of sludge more negative, and the addition of Fe(II) and Fe(III) made the ORP of sludge less negative. However, whether being more or less negative, the changes of ORP may show unobservable effects on methane yield when it ranged from −278.71 to −379.80 mV; (2) the degradation of dissolved organic nitrogen, particularly proteins, was less efficient in sludge samples dosed with Fe⁰ compared with those dosed with Fe(II) and Fe(III) after an incubation period of 30 d. At the same dose of 160 mg/L iron, more cysteine was noted in sludge samples dosed with Fe(II) (30.74 mg/L) and Fe(III) (27.92 mg/L) compared with that dosed with Fe⁰ (21.75 mg/L); (3) Fe⁰ particularly promoted the enrichment of Geobacter, and it was 6 times higher than those in sludge samples dosed with Fe(II) and Fe(III) at the same dose of 160 mg/L iron.[Figure not available: see fulltext.]

Original language	English
Article number	80
Journal	Frontiers of Environmental Science and Engineering
Volume	16
Issue number	6
DOIs	https://doi.org/10.1007/s11783-021-1514-3
State	Published - Jun 2022
Externally published	Yes

Keywords

Different iron valence
Dissolved organic nitrogen
Enhanced anaerobic sludge digestion
Microbial community
Oxidation reduction potential

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10.1007/s11783-021-1514-3

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title = "Comparison of different valent iron on anaerobic sludge digestion: Focusing on oxidation reduction potential, dissolved organic nitrogen and microbial community",

abstract = "This study compared effects of three different valent iron (Fe0, Fe(II) and Fe(III)) on enhanced anaerobic sludge digestion, focusing on the changes of oxidation reduction potential (ORP), dissolved organic nitrogen (DON), and microbial community. Under the same iron dose in range of 0–160 mg/L after an incubation period of 30 days (d), the maximum methane production rate of sludge samples dosed with respective Fe0, Fe(II) and Fe(III) at the same concentration showed indiscernible differences at each iron dose, regardless of the different iron valence. Moreover, their behavior in changes of ORP, DON and microbial community was different: (1) the addition of Fe0 made the ORP of sludge more negative, and the addition of Fe(II) and Fe(III) made the ORP of sludge less negative. However, whether being more or less negative, the changes of ORP may show unobservable effects on methane yield when it ranged from −278.71 to −379.80 mV; (2) the degradation of dissolved organic nitrogen, particularly proteins, was less efficient in sludge samples dosed with Fe0 compared with those dosed with Fe(II) and Fe(III) after an incubation period of 30 d. At the same dose of 160 mg/L iron, more cysteine was noted in sludge samples dosed with Fe(II) (30.74 mg/L) and Fe(III) (27.92 mg/L) compared with that dosed with Fe0 (21.75 mg/L); (3) Fe0 particularly promoted the enrichment of Geobacter, and it was 6 times higher than those in sludge samples dosed with Fe(II) and Fe(III) at the same dose of 160 mg/L iron.[Figure not available: see fulltext.]",

keywords = "Different iron valence, Dissolved organic nitrogen, Enhanced anaerobic sludge digestion, Microbial community, Oxidation reduction potential",

author = "Zecong Yu and Keke Xiao and Yuwei Zhu and Mei Sun and Sha Liang and Jingping Hu and Huijie Hou and Bingchuan Liu and Jiakuan Yang",

note = "Publisher Copyright: {\textcopyright} 2021, Higher Education Press.",

year = "2022",

month = jun,

doi = "10.1007/s11783-021-1514-3",

language = "英语",

volume = "16",

journal = "Frontiers of Environmental Science and Engineering",

issn = "2095-2201",

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number = "6",

}

TY - JOUR

T1 - Comparison of different valent iron on anaerobic sludge digestion

T2 - Focusing on oxidation reduction potential, dissolved organic nitrogen and microbial community

AU - Yu, Zecong

AU - Xiao, Keke

AU - Zhu, Yuwei

AU - Sun, Mei

AU - Liang, Sha

AU - Hu, Jingping

AU - Hou, Huijie

AU - Liu, Bingchuan

AU - Yang, Jiakuan

PY - 2022/6

Y1 - 2022/6

N2 - This study compared effects of three different valent iron (Fe0, Fe(II) and Fe(III)) on enhanced anaerobic sludge digestion, focusing on the changes of oxidation reduction potential (ORP), dissolved organic nitrogen (DON), and microbial community. Under the same iron dose in range of 0–160 mg/L after an incubation period of 30 days (d), the maximum methane production rate of sludge samples dosed with respective Fe0, Fe(II) and Fe(III) at the same concentration showed indiscernible differences at each iron dose, regardless of the different iron valence. Moreover, their behavior in changes of ORP, DON and microbial community was different: (1) the addition of Fe0 made the ORP of sludge more negative, and the addition of Fe(II) and Fe(III) made the ORP of sludge less negative. However, whether being more or less negative, the changes of ORP may show unobservable effects on methane yield when it ranged from −278.71 to −379.80 mV; (2) the degradation of dissolved organic nitrogen, particularly proteins, was less efficient in sludge samples dosed with Fe0 compared with those dosed with Fe(II) and Fe(III) after an incubation period of 30 d. At the same dose of 160 mg/L iron, more cysteine was noted in sludge samples dosed with Fe(II) (30.74 mg/L) and Fe(III) (27.92 mg/L) compared with that dosed with Fe0 (21.75 mg/L); (3) Fe0 particularly promoted the enrichment of Geobacter, and it was 6 times higher than those in sludge samples dosed with Fe(II) and Fe(III) at the same dose of 160 mg/L iron.[Figure not available: see fulltext.]

AB - This study compared effects of three different valent iron (Fe0, Fe(II) and Fe(III)) on enhanced anaerobic sludge digestion, focusing on the changes of oxidation reduction potential (ORP), dissolved organic nitrogen (DON), and microbial community. Under the same iron dose in range of 0–160 mg/L after an incubation period of 30 days (d), the maximum methane production rate of sludge samples dosed with respective Fe0, Fe(II) and Fe(III) at the same concentration showed indiscernible differences at each iron dose, regardless of the different iron valence. Moreover, their behavior in changes of ORP, DON and microbial community was different: (1) the addition of Fe0 made the ORP of sludge more negative, and the addition of Fe(II) and Fe(III) made the ORP of sludge less negative. However, whether being more or less negative, the changes of ORP may show unobservable effects on methane yield when it ranged from −278.71 to −379.80 mV; (2) the degradation of dissolved organic nitrogen, particularly proteins, was less efficient in sludge samples dosed with Fe0 compared with those dosed with Fe(II) and Fe(III) after an incubation period of 30 d. At the same dose of 160 mg/L iron, more cysteine was noted in sludge samples dosed with Fe(II) (30.74 mg/L) and Fe(III) (27.92 mg/L) compared with that dosed with Fe0 (21.75 mg/L); (3) Fe0 particularly promoted the enrichment of Geobacter, and it was 6 times higher than those in sludge samples dosed with Fe(II) and Fe(III) at the same dose of 160 mg/L iron.[Figure not available: see fulltext.]

KW - Different iron valence

KW - Dissolved organic nitrogen

KW - Enhanced anaerobic sludge digestion

KW - Microbial community

KW - Oxidation reduction potential

UR - http://www.scopus.com/inward/record.url?scp=85118265283&partnerID=8YFLogxK

U2 - 10.1007/s11783-021-1514-3

DO - 10.1007/s11783-021-1514-3

M3 - 文章

AN - SCOPUS:85118265283

SN - 2095-2201

VL - 16

JO - Frontiers of Environmental Science and Engineering

JF - Frontiers of Environmental Science and Engineering

IS - 6

M1 - 80

ER -

Comparison of different valent iron on anaerobic sludge digestion: Focusing on oxidation reduction potential, dissolved organic nitrogen and microbial community

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Keywords

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