A kinetic model for volatile fatty acid biodegradation during aerobic treatment of piggery wastes
✍ Scribed by P. Gaunt; K. W. Hester
- Publisher
- John Wiley and Sons
- Year
- 1989
- Tongue
- English
- Weight
- 349 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0006-3592
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✦ Synopsis
Samples of malodorous pig slurry were aerated in 2 L shake flasks for 24 hours. During aeration, measurements of the concentrations of the individual volatile fatty acids (VFAs) acetic acid, propionic acid, butyric acid, isobutyric acid, valeric acid and isovaleric acid were made using a gas chromatograph. VFAs are an indicator of odor offensiveness levels in piggery wastes. VFA levels remained constant for the first 6-8 hours and then decreased. The rate of biodegradation of each VFA was found to be zero order with respect to its concentration. The implications of these results i n the design of batch aeration units f o r agricultural wastes are discussed.