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Ozonolysis as an Effective Pretreatment Strategy for Bioethanol Production from Marine Algae
- Source :
- BioEnergy Research. 13:1269-1279
- Publication Year :
- 2020
- Publisher :
- Springer Science and Business Media LLC, 2020.
-
Abstract
- Marine algae are promising third-generation feedstocks for bioethanol production as they are fast growing, require minimal inputs, and do not compete for land. However, marine algae have complex cell walls which necessitate pretreatment prior to fermentation, and this represents a major component of the cost of bioethanol production. Standard pretreatment processes using acids are costly and generate hazardous waste streams. This study aims to develop an economic and environmentally friendly pretreatment process using ozonolysis for the marine algae Kappaphycus alvarezii and Gelidium amansii. Acid and ozone pretreatments were compared across the pretreatment, enzyme hydrolysis, and fermentation stages of bioethanol production. Acid pretreatment outperformed ozonolysis over the pretreatment and enzyme hydrolysis stages. However, it also generated as by-products the compounds 5-hydroxymethyl furfural (5-HMF) and levulinic acid (LA), which inhibited ethanol fermentation and reduced the efficiency of the process overall. Ozone pretreatment did not produce these inhibitory compounds, and as such outperformed acid pretreatment across the process as a whole. These results indicate the potential of ozonolysis as an economic and environmentally friendly pretreatment for the production of bioethanol from marine algae.
- Subjects :
- 0106 biological sciences
biology
Renewable Energy, Sustainability and the Environment
Chemistry
020209 energy
Gelidium amansii
02 engineering and technology
Ethanol fermentation
biology.organism_classification
Pulp and paper industry
01 natural sciences
Environmentally friendly
chemistry.chemical_compound
Kappaphycus alvarezii
Biofuel
010608 biotechnology
Enzymatic hydrolysis
0202 electrical engineering, electronic engineering, information engineering
Levulinic acid
Fermentation
Agronomy and Crop Science
Energy (miscellaneous)
Subjects
Details
- ISSN :
- 19391242 and 19391234
- Volume :
- 13
- Database :
- OpenAIRE
- Journal :
- BioEnergy Research
- Accession number :
- edsair.doi...........5e7752a5279e5ce4785f9d4572ed0eb9