Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 673, Issue -, Pages 378-383Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.scitotenv.2019.04.079
Keywords
Ethanol production; Waste cake; alpha-Amylase hydrolysis; Waste reduction
Categories
Funding
- NSFC-Zhejiang Joint Fund for the Integration of Industrialization and Information [U1709215]
- National Science Foundation of China [41373121]
Ask authors/readers for more resources
In this study, utilization of waste cake for bioethanol production via a two-step of enzymatic hydrolysis and ethanol fermentation was developed. At the first step, namely waste cake hydrolysis, effects of a-amylase volumes (C1: 0.1mL/L, C2: 0.4 mL/L, C3, 0.8 mL/L) on the performance of hydrolysis were investigated. Both chemical oxygen demand (COD) and reducing sugar (RS) could reach the highest values after 80 min for all the conditions. The maximum COD of 86.3 g/L, RS of 44 g/L and waste reduction of 85.2% were achieved at C3. At the second step, namely ethanol fermentation, the produced waste cake hydrolysate was used as the sole feedstock for fermentative ethanol production, and the highest ethanol production of 46.6 g/L and ethanol yield of 1.13 g/g RS were obtained (C3), respectively. This corresponds to an overall ethanol yield of 1.12 g ethanol/g initial dry cake which is the highest ethanol yield compared to using other food wastes reported to date. These values are higher than using the glucose as feedstock since the waste cake hydrolysate could provide the carbon and nitrogen sources for ethanol fermentation. (C) 2019 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available