| Title | Pollution to Product-a Novel Two-Stage Single-Pot Fermentative Production of 1,3-Propanediol |
|---|---|
| ID_Doc | 7090 |
| Authors | Anand, S; Mukherjee, K; Padmanabhan, P |
| Title | Pollution to Product-a Novel Two-Stage Single-Pot Fermentative Production of 1,3-Propanediol |
| Year | 2023 |
| Published | Bioenergy Research, 16, 3 |
| Abstract | Many industrial chemicals are currently produced from fossil resources. However, extensive use of fossil fuels has resulted in an alarming array of energy and pollution-related challenges. The industrial chemicals that are produced from fossil resources could be produced alternatively using green route in a sustainable manner. Here we report the production of 1,3-propanediol (1,3-PDO) through fermentative route using sugarcane processing wastes (sugarcane bagasse). This study used the second-generation (2G) fermentable sugar (2G FS) recovered from the low-cost feedstock sugarcane bagasse as a substrate for 1,3-PDO production through a mixed culture fermentation in a single pot using Saccharomyces cerevisiae NCIM 3594 and Klebsiella pneumoniae NCIM 2957. This novel concept of single-pot, mixed culture fermentation method to produce 1,3-PDO was verified by optimizing process parameters like substrate concentration (2G FS), pH, and temperature. The concentration of 2G FS was varied in the range of 0.5-5% (V-2G FS/V-working volume), pH was varied between 6 and 7, and the temperature range was 30-37 degrees C. The maximum production of 1,3-PDO was observed at the concentration of 5% (V-2G FS/V-working volume), at an optimum pH of 6.8 and a temperature of 35 degrees C. The evaluated thermodynamics parameters for analyzing the rate of fermentation were enthalpy (Delta H), -47596 KJ/mol; activation energy (Delta E), -47596 KJ/mol; entropy (Delta S), 500.46 J/mol; and Gibbs free energy (Delta G), -2.018 x 10(5) J/mol; and the kinetics parameters were specific growth rate (mu), 0.0053 h(-1); cell mass productivity (Q(x)), 0.249 g/L(/)h; rate of production (Q(p)), 0.237 g/L(/)h; and product yield (Y-p/s), 0.0427 g/g. This work demonstrates a novel single-pot method to produce 1,3-PDO from a low-cost feedstock and makes a valuable contribution to the development of a cost-effective fermentation based on renewable resources. |
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