Effect of mixing driven by siphon flow: Parallel experiments using the anaerobic reactors with different mixing modes

Takuro Kobayashi; Ya Peng Wu; Kai Qin Xu; Yu You Li

doi:10.3390/en6084207

Effect of mixing driven by siphon flow: Parallel experiments using the anaerobic reactors with different mixing modes

Takuro Kobayashi, Ya Peng Wu, Kai Qin Xu, Yu You Li

ENG - Civil and Environmental Engineering

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

14 Citations (Scopus)

Abstract

The effect of mixing by siphon flow on anaerobic digestion, sludge distribution and microbial community were examined in parallel experiments using a siphon-mixed reactor (SMR), an unmixed reactor (UMR) and a continuously mixed reactor (CMR). The SMR performed well without the accumulation of fatty acids under COD loading rates varying from 3 to 18 kg/m³/day, while the UMR was totally acidified when the loading rate increased to 10 kg/m³/day. The methane yield of the SMR was at least 10% higher than that of the UMR, and comparable to that of the CMR. Furthermore, the SMR was found to markedly improve the dispersion of solids and reduce deposit formation compared to the UMR. Besides, during stable operation, the fatty acids level in the effluent of the SMR and UMR was lower than that in the CMR, and the archaeal community structure of the SMR was similar to that of the UMR.

Original language	English
Pages (from-to)	4207-4222
Number of pages	16
Journal	Energies
Volume	6
Issue number	8
DOIs	https://doi.org/10.3390/en6084207
Publication status	Published - 2013

Keywords

Anaerobic digestion
Microbial community
Mixing mode
Siphon mixed reactor
Sludge distribution

UN SDGs

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

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10.3390/en6084207

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title = "Effect of mixing driven by siphon flow: Parallel experiments using the anaerobic reactors with different mixing modes",

abstract = "The effect of mixing by siphon flow on anaerobic digestion, sludge distribution and microbial community were examined in parallel experiments using a siphon-mixed reactor (SMR), an unmixed reactor (UMR) and a continuously mixed reactor (CMR). The SMR performed well without the accumulation of fatty acids under COD loading rates varying from 3 to 18 kg/m3/day, while the UMR was totally acidified when the loading rate increased to 10 kg/m3/day. The methane yield of the SMR was at least 10% higher than that of the UMR, and comparable to that of the CMR. Furthermore, the SMR was found to markedly improve the dispersion of solids and reduce deposit formation compared to the UMR. Besides, during stable operation, the fatty acids level in the effluent of the SMR and UMR was lower than that in the CMR, and the archaeal community structure of the SMR was similar to that of the UMR.",

keywords = "Anaerobic digestion, Microbial community, Mixing mode, Siphon mixed reactor, Sludge distribution",

author = "Takuro Kobayashi and Wu, {Ya Peng} and Xu, {Kai Qin} and Li, {Yu You}",

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doi = "10.3390/en6084207",

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TY - JOUR

T1 - Effect of mixing driven by siphon flow

T2 - Parallel experiments using the anaerobic reactors with different mixing modes

AU - Kobayashi, Takuro

AU - Wu, Ya Peng

AU - Xu, Kai Qin

AU - Li, Yu You

PY - 2013

Y1 - 2013

N2 - The effect of mixing by siphon flow on anaerobic digestion, sludge distribution and microbial community were examined in parallel experiments using a siphon-mixed reactor (SMR), an unmixed reactor (UMR) and a continuously mixed reactor (CMR). The SMR performed well without the accumulation of fatty acids under COD loading rates varying from 3 to 18 kg/m3/day, while the UMR was totally acidified when the loading rate increased to 10 kg/m3/day. The methane yield of the SMR was at least 10% higher than that of the UMR, and comparable to that of the CMR. Furthermore, the SMR was found to markedly improve the dispersion of solids and reduce deposit formation compared to the UMR. Besides, during stable operation, the fatty acids level in the effluent of the SMR and UMR was lower than that in the CMR, and the archaeal community structure of the SMR was similar to that of the UMR.

AB - The effect of mixing by siphon flow on anaerobic digestion, sludge distribution and microbial community were examined in parallel experiments using a siphon-mixed reactor (SMR), an unmixed reactor (UMR) and a continuously mixed reactor (CMR). The SMR performed well without the accumulation of fatty acids under COD loading rates varying from 3 to 18 kg/m3/day, while the UMR was totally acidified when the loading rate increased to 10 kg/m3/day. The methane yield of the SMR was at least 10% higher than that of the UMR, and comparable to that of the CMR. Furthermore, the SMR was found to markedly improve the dispersion of solids and reduce deposit formation compared to the UMR. Besides, during stable operation, the fatty acids level in the effluent of the SMR and UMR was lower than that in the CMR, and the archaeal community structure of the SMR was similar to that of the UMR.

KW - Anaerobic digestion

KW - Microbial community

KW - Mixing mode

KW - Siphon mixed reactor

KW - Sludge distribution

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DO - 10.3390/en6084207

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SP - 4207

EP - 4222

JO - Energies

JF - Energies

IS - 8

ER -

Effect of mixing driven by siphon flow: Parallel experiments using the anaerobic reactors with different mixing modes

Abstract

Keywords

UN SDGs

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