| Title |
Enhanced lactic acid production with indigenous microbiota from date pulp waste and keratin protein hydrolysate from chicken feather waste |
| ID_Doc |
13080 |
| Authors |
Ahmad, A; Othman, I; Tardy, BL; Hasan, SW; Banat, F |
| Title |
Enhanced lactic acid production with indigenous microbiota from date pulp waste and keratin protein hydrolysate from chicken feather waste |
| Year |
2022 |
| Published |
|
| DOI |
10.1016/j.biteb.2022.101089 |
| Abstract |
A substantial amount of keratin, a key protein with excellent material -forming properties, can be sustainably extracted from chicken feathers, which are commonly discarded in the poultry industry. The keratin protein found in chicken feathers can serve as a nitrogen source and a pH regulator for microbes. In this study, the use of indigenous bacteria and extracted keratin protein hydrolysate from chicken feathers as a nitrogen source improved lactic acid production from date pulp waste by fermentation. After six days of optimal dark fermentation time at pH 6, the maximum concentration of L -lactic acid (46.2 g/L) was obtained with keratin protein hydrolysate and date pulp waste substrate. Under the same conditions, the value was 2.12 times higher than that of the date pulp waste substrate (21.7 g/L) without the addition of keratin protein hydrolysate. Under optimal conditions, volumetric lactic acid productivity and yield were 7.7 g/L/day and 0.3 g/g substrate, respectively. Keratin protein hydrolysate proved to be the most effective neutralizing agent for L -lactic acid production at a concentration of 6 g/L. The combination of keratin protein hydrolysate and date pulp waste was studied for the first time as a substrate for lactic acid production. Keratin protein hydrolysate was found to buffer pH changes during fermentation. Poultry and plant by-products are usually available in agriculturally challenged areas. Therefore, this study provides an excellent opportunity to recycle waste and improve the overall circular economy of such agro-industrial complexes. |
| Author Keywords |
Chicken feather; Chicken feather protein; Date pulp waste; Fermentation; Lactic acid |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Emerging Sources Citation Index (ESCI) |
| EID |
WOS:001231924500012 |
| WoS Category |
Biotechnology & Applied Microbiology; Energy & Fuels; Environmental Sciences |
| Research Area |
Biotechnology & Applied Microbiology; Energy & Fuels; Environmental Sciences & Ecology |
| PDF |
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