Characterization of sludge reduction and bacterial community dynamics in a pilot-scale multi-stage digester system with prolonged sludge retention time

Jeonghee Yun; Hee Wook Ryu; Hyung Pan Kim; Kyung Suk Cho

doi:10.1007/s00449-020-02312-w

Characterization of sludge reduction and bacterial community dynamics in a pilot-scale multi-stage digester system with prolonged sludge retention time

Jeonghee Yun, Hee Wook Ryu, Hyung Pan Kim, Kyung Suk Cho

Department of Environmental Science & Engineering

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

2 Scopus citations

Abstract

Sludge reduction performance and bacterial community dynamics in a pilot-scale multi-stage digester system with prolonged sludge retention time were characterized. Throughout the operation period of 281 days, the total loading sludge and the total digested sludge were 4700 and 3300 kg-MLSS. After 114 days of operation, the residual MLSS (RMLSS) in the reactors for sludge treatment was maintained at 18–25 kg-RMLSS m⁻³, and the sludge reduction efficiency achieved 95% under the F/M ratio (kg-loading MLSS kg-RMLSS⁻¹) of less than 0.018. Also, among the sludge components, both fixed suspended solids and volatile suspended solids were reduced. Based on the sludge reduction performance and the RNA-based bacterial community characteristics, the combined action of the maintenance metabolism, lysis–cryptic growth, and particulate inorganic matter is proposed as the sludge reduction mechanism in the multi-stage sludge treatment process.

Original language	English
Pages (from-to)	1171-1183
Number of pages	13
Journal	Bioprocess and Biosystems Engineering
Volume	43
Issue number	7
DOIs	https://doi.org/10.1007/s00449-020-02312-w
State	Published - 1 Jul 2020

Bibliographical note

Funding Information:
This research was supported by the Global Eco Technology Company (Incheon, Republic of Korea).

Publisher Copyright:
© 2020, Springer-Verlag GmbH Germany, part of Springer Nature.

Keywords

Bacterial community dynamics
Maintenance metabolism
Multi-stage digesters
Prolonged retention time
Sludge reduction

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10.1007/s00449-020-02312-w

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title = "Characterization of sludge reduction and bacterial community dynamics in a pilot-scale multi-stage digester system with prolonged sludge retention time",

abstract = "Sludge reduction performance and bacterial community dynamics in a pilot-scale multi-stage digester system with prolonged sludge retention time were characterized. Throughout the operation period of 281 days, the total loading sludge and the total digested sludge were 4700 and 3300 kg-MLSS. After 114 days of operation, the residual MLSS (RMLSS) in the reactors for sludge treatment was maintained at 18–25 kg-RMLSS m−3, and the sludge reduction efficiency achieved 95% under the F/M ratio (kg-loading MLSS kg-RMLSS−1) of less than 0.018. Also, among the sludge components, both fixed suspended solids and volatile suspended solids were reduced. Based on the sludge reduction performance and the RNA-based bacterial community characteristics, the combined action of the maintenance metabolism, lysis–cryptic growth, and particulate inorganic matter is proposed as the sludge reduction mechanism in the multi-stage sludge treatment process.",

keywords = "Bacterial community dynamics, Maintenance metabolism, Multi-stage digesters, Prolonged retention time, Sludge reduction",

author = "Jeonghee Yun and Ryu, {Hee Wook} and Kim, {Hyung Pan} and Cho, {Kyung Suk}",

note = "Funding Information: This research was supported by the Global Eco Technology Company (Incheon, Republic of Korea). Publisher Copyright: {\textcopyright} 2020, Springer-Verlag GmbH Germany, part of Springer Nature.",

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AU - Cho, Kyung Suk

N1 - Funding Information: This research was supported by the Global Eco Technology Company (Incheon, Republic of Korea). Publisher Copyright: © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.

PY - 2020/7/1

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N2 - Sludge reduction performance and bacterial community dynamics in a pilot-scale multi-stage digester system with prolonged sludge retention time were characterized. Throughout the operation period of 281 days, the total loading sludge and the total digested sludge were 4700 and 3300 kg-MLSS. After 114 days of operation, the residual MLSS (RMLSS) in the reactors for sludge treatment was maintained at 18–25 kg-RMLSS m−3, and the sludge reduction efficiency achieved 95% under the F/M ratio (kg-loading MLSS kg-RMLSS−1) of less than 0.018. Also, among the sludge components, both fixed suspended solids and volatile suspended solids were reduced. Based on the sludge reduction performance and the RNA-based bacterial community characteristics, the combined action of the maintenance metabolism, lysis–cryptic growth, and particulate inorganic matter is proposed as the sludge reduction mechanism in the multi-stage sludge treatment process.

AB - Sludge reduction performance and bacterial community dynamics in a pilot-scale multi-stage digester system with prolonged sludge retention time were characterized. Throughout the operation period of 281 days, the total loading sludge and the total digested sludge were 4700 and 3300 kg-MLSS. After 114 days of operation, the residual MLSS (RMLSS) in the reactors for sludge treatment was maintained at 18–25 kg-RMLSS m−3, and the sludge reduction efficiency achieved 95% under the F/M ratio (kg-loading MLSS kg-RMLSS−1) of less than 0.018. Also, among the sludge components, both fixed suspended solids and volatile suspended solids were reduced. Based on the sludge reduction performance and the RNA-based bacterial community characteristics, the combined action of the maintenance metabolism, lysis–cryptic growth, and particulate inorganic matter is proposed as the sludge reduction mechanism in the multi-stage sludge treatment process.

KW - Bacterial community dynamics

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KW - Multi-stage digesters

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Characterization of sludge reduction and bacterial community dynamics in a pilot-scale multi-stage digester system with prolonged sludge retention time

Abstract

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Keywords

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