Phosphoric acid-acetone process for cleaner production of acetone, butanol, and ethanol from waste cotton fibers
| Autor: | Mehran Seifollahi, Hamid Amiri |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Clostridium acetobutylicum
biology Renewable Energy Sustainability and the Environment 020209 energy Strategy and Management Butanol Cyclic acid 02 engineering and technology 010501 environmental sciences biology.organism_classification 01 natural sciences Industrial and Manufacturing Engineering chemistry.chemical_compound chemistry Biofuel Enzymatic hydrolysis 0202 electrical engineering electronic engineering information engineering Acetone Fermentation Phosphoric acid 0105 earth and related environmental sciences General Environmental Science Nuclear chemistry |
| Zdroj: | Journal of Cleaner Production. 193:459-470 |
| ISSN: | 0959-6526 |
| DOI: | 10.1016/j.jclepro.2018.05.093 |
| Popis: | To move biobutanol toward a commercialized biofuel, its production process should be developed based on renewable and cost-effective carbon sources. In this study, it was shown that cotton, a commodity that typically ends in landfill sites or incinerators, can be utilized as a feasible source after the phosphoric acid-acetone process. The treatment with phosphoric acid (19 g/g) resulted in 94% cotton dissolution after 60 min, and the addition of acetone (41 g/g) was accompanied by 97% precipitation. Enzymatic hydrolysis of regenerated cellulose (15 filter paper unit per mL (FPU/mL)) followed by fermentation by Clostridium acetobutylicum resulted in 5.4 g/L acetone-butanol-ethanol (ABE). In this process, 208 g acid and 138 FPU cellulase were used for production of each g ABE. Increasing enzyme dosage to 25 FPU/g resulted in 79% higher butanol production (161 g ABE/kg). Through cyclic acid re-concentration, phosphoric acid consumption decreased to 82 g/g ABE. Furthermore, by applying an additional dilute phosphoric acid pretreatment, the enzyme consumption reduced to 113 FPU/g ABE. |
| Databáze: | OpenAIRE |
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