Conversion of food processing wastes to biofuel using clostridia.

Autor: Abd-Alla MH; Botany and Microbiology Department, Faculty of Science, Assiut University, Assiut 71516, Egypt. Electronic address: mhabdalla2002@yahoo.com., Zohri AA; Botany and Microbiology Department, Faculty of Science, Assiut University, Assiut 71516, Egypt., El-Enany AE; Botany and Microbiology Department, Faculty of Science, Assiut University, Assiut 71516, Egypt., Ali SM; Botany Department, Faculty of Science, New Valley Branch, Assiut University, 72511 El-Kharja, Egypt.
Jazyk: angličtina
Zdroj: Anaerobe [Anaerobe] 2017 Dec; Vol. 48, pp. 135-143. Date of Electronic Publication: 2017 Aug 18.
DOI: 10.1016/j.anaerobe.2017.08.011
Abstrakt: This study aims to demonstrate the recycling of food processing wastes as a low cost-effective substrate for acetone - butanol - ethanol (ABE) production. Potato peels and cheese whey were utilized during fermentation with eight local Clostridium strains in addition to the commercial strain, C. acetobutylicum ATCC 824 for ABE and organic acids production. From potato peels, Clostridium beijerinckii ASU10 produced the highest ABE production (17.91 g/l) representing 61.3% butanol (10.98 g/l), 33.6% acetone (6.02 g/l) and 5.1% ethanol (0.91 g/l). While, C. chauvoei ASU12 showed the highest acid production (8.15 g/l) including 5.50 and 2.61 g/l acetic and butyric acids, respectively. Use of cheese whey as fermentable substrate exhibited a substantial increase in ethanol ratio and decrease in butanol ratio compared to those produced from potato peels. Clostridium beijerinckii ASU5 produced the highest ABE concentration (7.13 g/l) representing 50.91% butanol (3.63 g/l), 35.34% acetone (2.52 g/l) and 13.74% ethanol (0.98 g/l). The highest acid production (8.00 g/l) was obtained by C. beijerinckii ASU5 representing 4.89 and 3.11 g/l for acetic and butyric acid, respectively. Supplementation of potato peels with an organic nitrogen source showed NH 4 NO 3 promoted ABE production more than yeast extract. In conclusion, this study introduced an ecofriendly and economical practice for utilization of food processing wastes (renewable substrates as potato peels and cheese whey) for biofuel production using various Clostridium strains.
(Copyright © 2017 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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