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Continuous solid-substrate fermentation of feedlot waste with grain
AbstractA process was developed to rapidly and continuously recycle animal waste by fermenting it in a mixture with coarsely cracked corn. The particulate waste-grain substrate at 40–45% moisture was tumbled in a three-chambered cylinder equipped with mixing baffles and rotated horizontally on its long axis at 0·5 rpm. The fermentor operated with a retained quantity of 7·5 kg waste-grain mixture and a throughput of 205 kg day−1. Small amounts of waste and grain were introduced simultaneously at short intervals into one end of the cylindrical vessel to achieve residence times of 54–108 h. Lactobacilli (1010 g−1) and yeasts (108 g−1) invariably dominated the fermentation regardless of residence time. The fermented product had a silage-like odor, and the lactic and acetic acids produced during the fermentation essentially eliminated fecal coliforms when the pH stabilized at approximately 4·1 over a residence time of 100 h or more.
Continuous solid-substrate fermentation of feedlot waste with grain
AbstractA process was developed to rapidly and continuously recycle animal waste by fermenting it in a mixture with coarsely cracked corn. The particulate waste-grain substrate at 40–45% moisture was tumbled in a three-chambered cylinder equipped with mixing baffles and rotated horizontally on its long axis at 0·5 rpm. The fermentor operated with a retained quantity of 7·5 kg waste-grain mixture and a throughput of 205 kg day−1. Small amounts of waste and grain were introduced simultaneously at short intervals into one end of the cylindrical vessel to achieve residence times of 54–108 h. Lactobacilli (1010 g−1) and yeasts (108 g−1) invariably dominated the fermentation regardless of residence time. The fermented product had a silage-like odor, and the lactic and acetic acids produced during the fermentation essentially eliminated fecal coliforms when the pH stabilized at approximately 4·1 over a residence time of 100 h or more.
Continuous solid-substrate fermentation of feedlot waste with grain
Hrubant, G.R. (author) / Rhodes, R.A. (author) / Orton, W.L. (author)
Biological Wastes ; 28 ; 277-291
1988-11-08
15 pages
Article (Journal)
Electronic Resource
English
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