Methane production from the soluble fraction of distillers' dried grains with solubles in anaerobic sequencing batch reactors
| Autor: | P. J. Hirl, Daniel P. Cassidy, E. Belia |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Waste management
Ecological Modeling Chemical oxygen demand Sequencing batch reactor Pulp and paper industry Pollution Methane Distillers grains chemistry.chemical_compound Bioreactors Biogas chemistry Solubility Volatile suspended solids Environmental Chemistry Ethanol fuel Anaerobiosis Energy source Waste Management and Disposal Water Science and Technology |
| Zdroj: | Water environment research : a research publication of the Water Environment Federation. 80(6) |
| ISSN: | 1061-4303 |
| Popis: | 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 x 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) x d. Biogas methane content varied from 61 to 74%, with 0.29 L CH4 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. |
| Databáze: | OpenAIRE |
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