Production of lactic acid from pulp mill solid waste and xylose using Lactobacillus delbrueckii (NRRL B445) |
| |
Authors: | Thomas Susanna |
| |
Affiliation: | (1) Department of Chemical Engineering, Auburn University, 36849 Auburn, AL |
| |
Abstract: | Using the simultaneoussaccharification and fermentation (SSF) technique, pulp mill solid waste cellulose was converted into glucose using cellulase enzyme and glucose into lacticacid using NRRL B445. SSF experiments were conducted at various pH levels, temperatures, and nutrient concentrations, and the lactic acid yield ranged from 86 to 97%. The depletion of xylose in SSF was further investigated by inoculating NRRL B445 into a xylose-only medium. On prolonged incubation, depletion of xylose with lactic acid production was observed. An experimental procedure with a nonglucose medium was developed to eliminate the lag phase. From xylose fermentation, Lactobacillus delbrueckii yielded 88–92% lactic acid and 2–12% acetic acid. |
| |
Keywords: | Xylose pulp mill solid waste lactic acid Lactobacillus fermentation |
本文献已被 SpringerLink 等数据库收录! |
|