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Novel biorefining method for succinic acid processed from sugarcane bagasse
Jianjun Chen1, Shuai Yang1, Md Asraful Alam2
1College of Life Science, Henan Normal University, Xinxiang 453007, China.
Bioresource Technology
|January 17, 2021
Summary
Alkali pretreatment of sugarcane bagasse (SCB) followed by in-situ semi-simultaneous saccharification and co-fermentation (SSSCF) significantly improves succinic acid (SA) production. This integrated approach enhances SA yield and productivity while reducing environmental impact.
Area of Science:
- Biotechnology
- Biochemical Engineering
- Sustainable Chemistry
Background:
- Sugarcane bagasse (SCB) is an abundant lignocellulosic biomass.
- Efficient conversion of SCB into valuable biochemicals like succinic acid (SA) is crucial for biorefineries.
- Conventional pretreatment and fermentation methods face challenges in optimizing yield and resource utilization.
Purpose of the Study:
- To develop and evaluate a novel in-situ semi-simultaneous saccharification and co-fermentation (SSSCF) process for succinic acid production from sugarcane bagasse.
- To compare the efficiency of different pretreatment methods (hot water, ethanol, sodium hydroxide) on SCB residue digestibility and SA conversion.
- To assess the environmental benefits and productivity enhancement of the integrated SSSCF approach.
Main Methods:
- Pretreatment of SCB using hot water (HLW), ethanol (ETH), and sodium hydroxide (SH).
- Hydrolysis of pretreated SCB residuals and their use as carbon sources for SA fermentation.
- Development and implementation of an in-situ semi-simultaneous saccharification and co-fermentation (SSSCF) procedure.
- Quantification of SA yield, productivity, and conversion rates.
Main Results:
- Alkali-pretreated SCB residue exhibited superior digestibility and SA conversion rates compared to HLW and ETH.
- The developed SSSCF procedure achieved SA yield of 41 g/L, productivity of 300 mg/L/h, and conversion rate of 320 mg/g dry.
- The SSSCF method reduced sodium hydroxide usage by 0.14 kg, water by 233.5 L, energy consumption by 14,000 kJ, and effluent emission by 7 L per kg of SA produced.
- SA productivity was enhanced by 1.7 times compared to non-coupling procedures.
Conclusions:
- The integrated SSSCF process is a highly effective strategy for SA production from SCB.
- Alkali pretreatment combined with SSSCF offers significant improvements in SA yield, productivity, and resource efficiency.
- This approach presents a sustainable and environmentally friendly method for converting lignocellulosic biomass into valuable chemicals.
