Methane Production from the Soluble Fraction of Distillers' Dried Grains with Solubles in Anaerobic Sequencing Batch Reactors: Fid-Bau Portal

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Methane Production from the Soluble Fraction of Distillers' Dried Grains with Solubles in Anaerobic Sequencing Batch Reactors

Cassidy, D. P. / Hirl, P. J. / Belia, E.

Methane production from the soluble fraction of distillers' dried grains with solubles, a co‐product of ethanol production, was studied in 2‐L anaerobic sequencing batch reactors (ASBRs) under 10 different operating conditions. Methane production and chemical oxygen demand (COD) removal were quantified for a wide range of operating parameters. Chemical oxygen demand removals of 64 to 95% were achieved at organic loading rates ranging from 1.5 to 22.2 g COD/L · d, solids retention times from 8 to 40 days, and food‐to‐microorganism ratios ranging from 0.4 to 1.9 g COD/g volatile suspended solids (VSS) · d. Biogas methane content varied from 61 to 74%, with 0.29 L CH ₄ produced/g COD removed. Roughly 56% of the influent COD and 84% of the COD removed in the ASBRs was converted to methane. Microbial yield (Y) and decay (b) constants were determined to be Y = 0.126 g VSS/g COD removed and b = 0.032 day ⁻¹, respectively. Methane produced from co‐products can reduce the costs and fossil‐fuel consumption of ethanol manufacture.

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Methane Production from the Soluble Fraction of Distillers' Dried Grains with Solubles in Anaerobic Sequencing Batch Reactors

Cassidy, D. P. / Hirl, P. J. / Belia, E.

Methane production from the soluble fraction of distillers' dried grains with solubles, a co‐product of ethanol production, was studied in 2‐L anaerobic sequencing batch reactors (ASBRs) under 10 different operating conditions. Methane production and chemical oxygen demand (COD) removal were quantified for a wide range of operating parameters. Chemical oxygen demand removals of 64 to 95% were achieved at organic loading rates ranging from 1.5 to 22.2 g COD/L · d, solids retention times from 8 to 40 days, and food‐to‐microorganism ratios ranging from 0.4 to 1.9 g COD/g volatile suspended solids (VSS) · d. Biogas methane content varied from 61 to 74%, with 0.29 L CH ₄ produced/g COD removed. Roughly 56% of the influent COD and 84% of the COD removed in the ASBRs was converted to methane. Microbial yield (Y) and decay (b) constants were determined to be Y = 0.126 g VSS/g COD removed and b = 0.032 day ⁻¹, respectively. Methane produced from co‐products can reduce the costs and fossil‐fuel consumption of ethanol manufacture.

Methane Production from the Soluble Fraction of Distillers' Dried Grains with Solubles in Anaerobic Sequencing Batch Reactors

Cassidy, D. P. / Hirl, P. J. / Belia, E.

Methane production from the soluble fraction of distillers' dried grains with solubles, a co‐product of ethanol production, was studied in 2‐L anaerobic sequencing batch reactors (ASBRs) under 10 different operating conditions. Methane production and chemical oxygen demand (COD) removal were quantified for a wide range of operating parameters. Chemical oxygen demand removals of 64 to 95% were achieved at organic loading rates ranging from 1.5 to 22.2 g COD/L · d, solids retention times from 8 to 40 days, and food‐to‐microorganism ratios ranging from 0.4 to 1.9 g COD/g volatile suspended solids (VSS) · d. Biogas methane content varied from 61 to 74%, with 0.29 L CH ₄ produced/g COD removed. Roughly 56% of the influent COD and 84% of the COD removed in the ASBRs was converted to methane. Microbial yield (Y) and decay (b) constants were determined to be Y = 0.126 g VSS/g COD removed and b = 0.032 day ⁻¹, respectively. Methane produced from co‐products can reduce the costs and fossil‐fuel consumption of ethanol manufacture.

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Title:

Methane Production from the Soluble Fraction of Distillers' Dried Grains with Solubles in Anaerobic Sequencing Batch Reactors

Contributors:

Cassidy, D. P. (author) / Hirl, P. J. (author) / Belia, E. (author)

Published in:

Water Environment Research ; 80 ; 570-575

Publication date:

2008-06-01

Size:

6 pages

ISSN:

1554-7531 , 1061-4303

DOI:

https://doi.org/10.2175/106143007X221517

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

anaerobic , distillers' dried grains with solubles , methane , anaerobic sequencing batch reactor , ethanol , biogas

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