Sludge reduction and microbial community structure in an anaerobic/anoxic/oxic process coupled with potassium ferrate disintegration

Ying An; Zhen Zhou; Jie Yao; Tianhao Niu; Zhan Qiu; Danian Ruan; Haijuan Wei

doi:10.1016/j.biortech.2017.09.023

Sludge reduction and microbial community structure in an anaerobic/anoxic/oxic process coupled with potassium ferrate disintegration

Ying An, Zhen Zhou^*, Jie Yao, Tianhao Niu, Zhan Qiu, Danian Ruan, Haijuan Wei

^*Corresponding author for this work

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

41 Scopus citations

Abstract

An anaerobic/anoxic/oxic (AAO) wastewater treatment system combining with a potassium ferrate (K₂FeO₄) oxidation side-stream reactor (SSR) was proposed for sludge reduction. Batch experiments showed that optimal K₂FeO₄ dosage and reaction time for sludge disintegration was 100 mg/g suspended solids (SS) and 24 h, respectively. Subsequently, an AAO-SSR and a conventional AAO were operated in parallel to investigate effects of K₂FeO₄ oxidation on process performance, sludge characteristics and microbial community structures. The AAO-SSR process operated under the optimized condition achieved efficient COD and NH₄⁺-N removal, and reduced sludge by 47.5% with observed yield coefficient of 0.21 g SS/g COD. K₂FeO₄ addition broke sludge particles, increased dissolved organic matters in the mixed liquor, and improved sludge dewaterability. Illumina-MiSeq sequencing results showed that K₂FeO₄ oxidation in the AAO-SSR decreased microbial richness and diversity, enriched slow growers (Dechloromonas), anaerobic fermentative bacteria (Azospira) and Fe(III)-reducing bacteria (Ferribacterium), but limited the growth of phosphate-accumulating organisms.

Original language	English
Pages (from-to)	954-961
Number of pages	8
Journal	Bioresource Technology
Volume	245
DOIs	https://doi.org/10.1016/j.biortech.2017.09.023
State	Published - 2017
Externally published	Yes

Keywords

Anaerobic/anoxic/oxic process
Microbial community
Potassium ferrate
Side-stream reactor
Sludge reduction

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.biortech.2017.09.023

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@article{ef84b6bd7339413e8a00cf237945d907,

title = "Sludge reduction and microbial community structure in an anaerobic/anoxic/oxic process coupled with potassium ferrate disintegration",

abstract = "An anaerobic/anoxic/oxic (AAO) wastewater treatment system combining with a potassium ferrate (K2FeO4) oxidation side-stream reactor (SSR) was proposed for sludge reduction. Batch experiments showed that optimal K2FeO4 dosage and reaction time for sludge disintegration was 100 mg/g suspended solids (SS) and 24 h, respectively. Subsequently, an AAO-SSR and a conventional AAO were operated in parallel to investigate effects of K2FeO4 oxidation on process performance, sludge characteristics and microbial community structures. The AAO-SSR process operated under the optimized condition achieved efficient COD and NH4+-N removal, and reduced sludge by 47.5\% with observed yield coefficient of 0.21 g SS/g COD. K2FeO4 addition broke sludge particles, increased dissolved organic matters in the mixed liquor, and improved sludge dewaterability. Illumina-MiSeq sequencing results showed that K2FeO4 oxidation in the AAO-SSR decreased microbial richness and diversity, enriched slow growers (Dechloromonas), anaerobic fermentative bacteria (Azospira) and Fe(III)-reducing bacteria (Ferribacterium), but limited the growth of phosphate-accumulating organisms.",

keywords = "Anaerobic/anoxic/oxic process, Microbial community, Potassium ferrate, Side-stream reactor, Sludge reduction",

author = "Ying An and Zhen Zhou and Jie Yao and Tianhao Niu and Zhan Qiu and Danian Ruan and Haijuan Wei",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier Ltd",

year = "2017",

doi = "10.1016/j.biortech.2017.09.023",

language = "英语",

volume = "245",

pages = "954--961",

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TY - JOUR

T1 - Sludge reduction and microbial community structure in an anaerobic/anoxic/oxic process coupled with potassium ferrate disintegration

AU - An, Ying

AU - Zhou, Zhen

AU - Yao, Jie

AU - Niu, Tianhao

AU - Qiu, Zhan

AU - Ruan, Danian

AU - Wei, Haijuan

PY - 2017

Y1 - 2017

N2 - An anaerobic/anoxic/oxic (AAO) wastewater treatment system combining with a potassium ferrate (K2FeO4) oxidation side-stream reactor (SSR) was proposed for sludge reduction. Batch experiments showed that optimal K2FeO4 dosage and reaction time for sludge disintegration was 100 mg/g suspended solids (SS) and 24 h, respectively. Subsequently, an AAO-SSR and a conventional AAO were operated in parallel to investigate effects of K2FeO4 oxidation on process performance, sludge characteristics and microbial community structures. The AAO-SSR process operated under the optimized condition achieved efficient COD and NH4+-N removal, and reduced sludge by 47.5% with observed yield coefficient of 0.21 g SS/g COD. K2FeO4 addition broke sludge particles, increased dissolved organic matters in the mixed liquor, and improved sludge dewaterability. Illumina-MiSeq sequencing results showed that K2FeO4 oxidation in the AAO-SSR decreased microbial richness and diversity, enriched slow growers (Dechloromonas), anaerobic fermentative bacteria (Azospira) and Fe(III)-reducing bacteria (Ferribacterium), but limited the growth of phosphate-accumulating organisms.

AB - An anaerobic/anoxic/oxic (AAO) wastewater treatment system combining with a potassium ferrate (K2FeO4) oxidation side-stream reactor (SSR) was proposed for sludge reduction. Batch experiments showed that optimal K2FeO4 dosage and reaction time for sludge disintegration was 100 mg/g suspended solids (SS) and 24 h, respectively. Subsequently, an AAO-SSR and a conventional AAO were operated in parallel to investigate effects of K2FeO4 oxidation on process performance, sludge characteristics and microbial community structures. The AAO-SSR process operated under the optimized condition achieved efficient COD and NH4+-N removal, and reduced sludge by 47.5% with observed yield coefficient of 0.21 g SS/g COD. K2FeO4 addition broke sludge particles, increased dissolved organic matters in the mixed liquor, and improved sludge dewaterability. Illumina-MiSeq sequencing results showed that K2FeO4 oxidation in the AAO-SSR decreased microbial richness and diversity, enriched slow growers (Dechloromonas), anaerobic fermentative bacteria (Azospira) and Fe(III)-reducing bacteria (Ferribacterium), but limited the growth of phosphate-accumulating organisms.

KW - Anaerobic/anoxic/oxic process

KW - Microbial community

KW - Potassium ferrate

KW - Side-stream reactor

KW - Sludge reduction

UR - https://www.scopus.com/pages/publications/85029548174

U2 - 10.1016/j.biortech.2017.09.023

DO - 10.1016/j.biortech.2017.09.023

M3 - 文章

C2 - 28946196

AN - SCOPUS:85029548174

SN - 0960-8524

VL - 245

SP - 954

EP - 961

JO - Bioresource Technology

JF - Bioresource Technology

ER -

Sludge reduction and microbial community structure in an anaerobic/anoxic/oxic process coupled with potassium ferrate disintegration

Abstract

Keywords

UN SDGs

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