Feasibility of the biodegradation of neutralized-caustic potato peel waste by aerobic-thermophilic fermentation
was examined. Fermentation temperature, pH, rate of solids utilization, dissolved oxygen and total organic nitrogen were characterized with respect to the fermentation process. Examination of these parameters showed distinct characteristic behaviour, though the parameter magnitude varied between the trials. The naturally occurring flora of thermophilic microorganisms of the potato was sufficient as an inoculum, with their propagation creating the fermentation
characteristics.
The solids content of the potato waste was reduced by the thermophilic fermentation with a noticeable improvement
in the nitrogen content in the remaining residue. Protein and amino acid analyses supported the feasibility of using the remaining residue as animal feed.
Increases in the nitrogen content of the substrate
was assumed to be due to the conversion of atmospheric
nitrogen by nitrogen-fixing microorganisms within the fermentation. Microbial identification indicated that these organisms belonged to the species Bacillus coagulans. No strains within this species have been previously reported to fix atmospheric nitrogen.
It was concluded that an aerobic-thermophilic fermentation can be utilized as a waste treatment process for caustic potato peel waste. Besides the numerous advantages of an aerobic-thermophilic fermentation, the validity for the utilization of this fermentation process in the treatment of potato peel waste is the near total disposal of the waste. / Land and Food Systems, Faculty of / Graduate
| Identifer | oai:union.ndltd.org:UBC/oai:circle.library.ubc.ca:2429/22242 |
| Date | January 1980 |
| Creators | Yee, Sherman Jack |
| Source Sets | University of British Columbia |
| Language | English |
| Detected Language | English |
| Type | Text, Thesis/Dissertation |
| Rights | For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use. |
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