Characterization of the retained sludge in a down-flow hanging sponge (DHS) reactor with emphasis on its low excess sludge production

Takashi Onodera; Kengo Matsunaga; Kengo Kubota; Ryoko Taniguchi; Hideki Harada; Kazuaki Syutsubo; Tsutomu Okubo; Shigeki Uemura; Nobuo Araki; Masayoshi Yamada; Masahito Yamauchi; Takashi Yamaguchi

doi:10.1016/j.biortech.2013.02.096

Characterization of the retained sludge in a down-flow hanging sponge (DHS) reactor with emphasis on its low excess sludge production

Takashi Onodera, Kengo Matsunaga, Kengo Kubota, Ryoko Taniguchi, Hideki Harada, Kazuaki Syutsubo, Tsutomu Okubo, Shigeki Uemura, Nobuo Araki, Masayoshi Yamada, Masahito Yamauchi, Takashi Yamaguchi

ENG - Civil and Environmental Engineering

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

50 Citations (Scopus)

Abstract

Experiments to characterize retained sludge in a down-flow hanging sponge (DHS) reactor fed with upflow anaerobic sludge blanket (UASB) treated sewage under moderate conditions were conducted. Plenty of oxygen was supplied through the DHS reactor without aeration and the effluent qualities after the reactor were comparable to activated sludge processes. The average excess sludge production rate was 0.09g SS g^-1 COD removed. The DHS reactor maintained a high sludge concentration of 26.9g VSS L^-1 sponge, resulting in a low loading rate of 0.032g COD g^-1 VSS day^-1. The endogenous respiration rate of DHS sludge was comparable to previously reported aerobic sludges. The numbers of microfauna were one order of magnitude greater than those in activated sludge. The results indicated that low excess sludge production was attributable to the high sludge concentration, sufficient oxygen supply, adequate endogenous respiration rate, and a high density and diversity of microfauna.

Original language	English
Pages (from-to)	169-175
Number of pages	7
Journal	Bioresource Technology
Volume	136
DOIs	https://doi.org/10.1016/j.biortech.2013.02.096
Publication status	Published - 2013 May

Keywords

Down-flow hanging sponge (DHS)
Low excess sludge
Microfauna
Sewage

ASJC Scopus subject areas

Bioengineering
Environmental Engineering
Renewable Energy, Sustainability and the Environment
Waste Management and Disposal

UN SDGs

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

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10.1016/j.biortech.2013.02.096

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Onodera, T., Matsunaga, K., Kubota, K., Taniguchi, R., Harada, H., Syutsubo, K., Okubo, T., Uemura, S., Araki, N., Yamada, M., Yamauchi, M., & Yamaguchi, T. (2013). Characterization of the retained sludge in a down-flow hanging sponge (DHS) reactor with emphasis on its low excess sludge production. Bioresource Technology, 136, 169-175. https://doi.org/10.1016/j.biortech.2013.02.096

Onodera, T, Matsunaga, K, Kubota, K, Taniguchi, R, Harada, H, Syutsubo, K, Okubo, T, Uemura, S, Araki, N, Yamada, M, Yamauchi, M & Yamaguchi, T 2013, 'Characterization of the retained sludge in a down-flow hanging sponge (DHS) reactor with emphasis on its low excess sludge production', Bioresource Technology, vol. 136, pp. 169-175. https://doi.org/10.1016/j.biortech.2013.02.096

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title = "Characterization of the retained sludge in a down-flow hanging sponge (DHS) reactor with emphasis on its low excess sludge production",

abstract = "Experiments to characterize retained sludge in a down-flow hanging sponge (DHS) reactor fed with upflow anaerobic sludge blanket (UASB) treated sewage under moderate conditions were conducted. Plenty of oxygen was supplied through the DHS reactor without aeration and the effluent qualities after the reactor were comparable to activated sludge processes. The average excess sludge production rate was 0.09g SS g-1 COD removed. The DHS reactor maintained a high sludge concentration of 26.9g VSS L-1 sponge, resulting in a low loading rate of 0.032g COD g-1 VSS day-1. The endogenous respiration rate of DHS sludge was comparable to previously reported aerobic sludges. The numbers of microfauna were one order of magnitude greater than those in activated sludge. The results indicated that low excess sludge production was attributable to the high sludge concentration, sufficient oxygen supply, adequate endogenous respiration rate, and a high density and diversity of microfauna.",

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author = "Takashi Onodera and Kengo Matsunaga and Kengo Kubota and Ryoko Taniguchi and Hideki Harada and Kazuaki Syutsubo and Tsutomu Okubo and Shigeki Uemura and Nobuo Araki and Masayoshi Yamada and Masahito Yamauchi and Takashi Yamaguchi",

note = "Funding Information: This study was supported by research Grants from the New Energy and Industrial Technology Development Organization (NEDO) , the Ministry of Education, Culture, Sports, Science and Technology (MEXT) , and SATREPS, JST / JICA, Japan . ",

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doi = "10.1016/j.biortech.2013.02.096",

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AU - Onodera, Takashi

AU - Matsunaga, Kengo

AU - Kubota, Kengo

AU - Taniguchi, Ryoko

AU - Harada, Hideki

AU - Syutsubo, Kazuaki

AU - Okubo, Tsutomu

AU - Uemura, Shigeki

AU - Araki, Nobuo

AU - Yamada, Masayoshi

AU - Yamauchi, Masahito

AU - Yamaguchi, Takashi

N1 - Funding Information: This study was supported by research Grants from the New Energy and Industrial Technology Development Organization (NEDO) , the Ministry of Education, Culture, Sports, Science and Technology (MEXT) , and SATREPS, JST / JICA, Japan .

PY - 2013/5

Y1 - 2013/5

N2 - Experiments to characterize retained sludge in a down-flow hanging sponge (DHS) reactor fed with upflow anaerobic sludge blanket (UASB) treated sewage under moderate conditions were conducted. Plenty of oxygen was supplied through the DHS reactor without aeration and the effluent qualities after the reactor were comparable to activated sludge processes. The average excess sludge production rate was 0.09g SS g-1 COD removed. The DHS reactor maintained a high sludge concentration of 26.9g VSS L-1 sponge, resulting in a low loading rate of 0.032g COD g-1 VSS day-1. The endogenous respiration rate of DHS sludge was comparable to previously reported aerobic sludges. The numbers of microfauna were one order of magnitude greater than those in activated sludge. The results indicated that low excess sludge production was attributable to the high sludge concentration, sufficient oxygen supply, adequate endogenous respiration rate, and a high density and diversity of microfauna.

AB - Experiments to characterize retained sludge in a down-flow hanging sponge (DHS) reactor fed with upflow anaerobic sludge blanket (UASB) treated sewage under moderate conditions were conducted. Plenty of oxygen was supplied through the DHS reactor without aeration and the effluent qualities after the reactor were comparable to activated sludge processes. The average excess sludge production rate was 0.09g SS g-1 COD removed. The DHS reactor maintained a high sludge concentration of 26.9g VSS L-1 sponge, resulting in a low loading rate of 0.032g COD g-1 VSS day-1. The endogenous respiration rate of DHS sludge was comparable to previously reported aerobic sludges. The numbers of microfauna were one order of magnitude greater than those in activated sludge. The results indicated that low excess sludge production was attributable to the high sludge concentration, sufficient oxygen supply, adequate endogenous respiration rate, and a high density and diversity of microfauna.

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KW - Microfauna

KW - Sewage

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ER -

Characterization of the retained sludge in a down-flow hanging sponge (DHS) reactor with emphasis on its low excess sludge production

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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