Journal
JOURNAL OF BIOSCIENCE AND BIOENGINEERING
Volume 131, Issue 6, Pages 655-662Publisher
SOC BIOSCIENCE BIOENGINEERING JAPAN
DOI: 10.1016/j.jbiosc.2021.02.009
Keywords
Food waste; Fermentation; Activated carbon; Lactic acid; Acetic acid; Carbohydrate; Protein
Funding
- National Key Research and Development Program of China [2018YFC1902900]
- Shenzhen Science and Technology Program
Ask authors/readers for more resources
The addition of activated carbon, especially honeycomb activated carbon, was found to accelerate and stabilize lactic acid fermentation from food waste by altering the microbial community structure and promoting the growth of specific bacteria. This enhanced tolerance of the fermentation system to harsh conditions and improved the overall efficiency of lactic acid production.
To accelerate and stabilize lactic acid fermentation from food waste, three types of activated carbon, including honeycomb activated carbon, granular activated carbon, and powder activated carbon, were tested as additives in continuous food waste fermentation processes. The results showed that carbohydrate was the primary substrate for lactic acid production, but its conversion reached a high, stable level after a long period of microbial acclimation in the control system. Activated carbon, especially honeycomb activated carbon accelerated the stabilization of lactic acid fermentation and enhanced the tolerance of fermentation systems to a hostile and fluctuating environment. The addition of activated carbon increased the oxidation-reduction potential to approximately 100 mV and altered the microbial communities. Homolactic fermentation bacteria were dominant in all the systems, and the honeycomb activated carbon addition stimulated the growth of unclassified Lactobacillus and immobilized Lactobacillus panis with strong carbohydrate metabolism. In addition, powder activated carbon enhanced the degradation of protein due to the multiplying Pseudomonas. At the stable stage, the organic conversion rates were close in the control system and the systems with the activated carbon addition, and the lactic acid concentrations in these systems remained at 8000-10,000 mg/L. Considering the cost of the additives, honeycomb activated carbon is a good choice to stabilize lactic acid production from food waste. (C) 2021, The Society for Biotechnology, Japan. 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