A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Ecotoxicity Assessment of Microalgae-Based Road Binder Obtained by Hydrothermal Liquefaction
https://orcid.org/http://orcid.org/0000-0001-8425-577X
https://orcid.org/http://orcid.org/0000-0001-9794-7441
https://orcid.org/http://orcid.org/0000-0001-7089-3543
This study focuses on exploring sustainable pathways for generating bitumen substitutes from renewable biomass, particularly microalgae residues. Microalgae, investigated for biofuel manufacturing due to their high yields on non-arable lands, can potentially create significant waste, emphasizing the need for waste valorization. Recent findings indicate that hydrothermal liquefaction (HTL) can transform microalgae residues into a viscoelastic hydrophobic material resembling petroleum-based bitumen. HTL, simulating natural petroleum formation conditions, offers advantages by converting wet biomass without energy-intensive drying.
The article aims to evaluate the ecotoxicological hazards associated with biobinders derived from HTL of microalgae for road construction. Materials used include Scenedesmus and Spirulina microalgae residues, processed through HTL in batch and continuous reactors. The resulting water-insoluble phases exhibit rheological properties similar to conventional bitumen.
Rheological measurements confirm the similarity in properties between the water-insoluble fraction from HTL on microalgae and conventional bitumens. Ecotoxicity assessments, including leaching tests and standardized aquatic impact measurements, reveal significant toxicity in mixes with both biobinders compared to the control mix with conventional bitumen. The study concludes that, at present, using HTL-processed biobinders for pavement materials might not be environmentally advisable, emphasizing the need for further investigation and process adaptation to prevent the formation of harmful chemical species.
Ecotoxicity Assessment of Microalgae-Based Road Binder Obtained by Hydrothermal Liquefaction
https://orcid.org/http://orcid.org/0000-0001-8425-577X
https://orcid.org/http://orcid.org/0000-0001-9794-7441
https://orcid.org/http://orcid.org/0000-0001-7089-3543
This study focuses on exploring sustainable pathways for generating bitumen substitutes from renewable biomass, particularly microalgae residues. Microalgae, investigated for biofuel manufacturing due to their high yields on non-arable lands, can potentially create significant waste, emphasizing the need for waste valorization. Recent findings indicate that hydrothermal liquefaction (HTL) can transform microalgae residues into a viscoelastic hydrophobic material resembling petroleum-based bitumen. HTL, simulating natural petroleum formation conditions, offers advantages by converting wet biomass without energy-intensive drying.
The article aims to evaluate the ecotoxicological hazards associated with biobinders derived from HTL of microalgae for road construction. Materials used include Scenedesmus and Spirulina microalgae residues, processed through HTL in batch and continuous reactors. The resulting water-insoluble phases exhibit rheological properties similar to conventional bitumen.
Rheological measurements confirm the similarity in properties between the water-insoluble fraction from HTL on microalgae and conventional bitumens. Ecotoxicity assessments, including leaching tests and standardized aquatic impact measurements, reveal significant toxicity in mixes with both biobinders compared to the control mix with conventional bitumen. The study concludes that, at present, using HTL-processed biobinders for pavement materials might not be environmentally advisable, emphasizing the need for further investigation and process adaptation to prevent the formation of harmful chemical species.
Ecotoxicity Assessment of Microalgae-Based Road Binder Obtained by Hydrothermal Liquefaction
https://orcid.org/http://orcid.org/0000-0001-8425-577X
https://orcid.org/http://orcid.org/0000-0001-9794-7441
https://orcid.org/http://orcid.org/0000-0001-7089-3543
This study focuses on exploring sustainable pathways for generating bitumen substitutes from renewable biomass, particularly microalgae residues. Microalgae, investigated for biofuel manufacturing due to their high yields on non-arable lands, can potentially create significant waste, emphasizing the need for waste valorization. Recent findings indicate that hydrothermal liquefaction (HTL) can transform microalgae residues into a viscoelastic hydrophobic material resembling petroleum-based bitumen. HTL, simulating natural petroleum formation conditions, offers advantages by converting wet biomass without energy-intensive drying.
The article aims to evaluate the ecotoxicological hazards associated with biobinders derived from HTL of microalgae for road construction. Materials used include Scenedesmus and Spirulina microalgae residues, processed through HTL in batch and continuous reactors. The resulting water-insoluble phases exhibit rheological properties similar to conventional bitumen.
Rheological measurements confirm the similarity in properties between the water-insoluble fraction from HTL on microalgae and conventional bitumens. Ecotoxicity assessments, including leaching tests and standardized aquatic impact measurements, reveal significant toxicity in mixes with both biobinders compared to the control mix with conventional bitumen. The study concludes that, at present, using HTL-processed biobinders for pavement materials might not be environmentally advisable, emphasizing the need for further investigation and process adaptation to prevent the formation of harmful chemical species.
Ecotoxicity Assessment of Microalgae-Based Road Binder Obtained by Hydrothermal Liquefaction
RILEM Bookseries
Vasconcelos, Kamilla (editor) / Jiménez del Barco Carrión, Ana (editor) / Chailleux, Emmanuel (editor) / Lo Presti, Davide (editor) / Chailleux, Emmanuel (author) / Queffelec, Clémence (author) / Lavaud, Stéphane (author) / Cantot, Justine (author) / Lépine, Olivier (author)
The International Workshop on the Use of Biomaterials in Pavements ; 2024 ; Sao Paolo, Brazil
2nd International Workshop on the Use of Biomaterials in Pavements ; Chapter: 15 ; 148-155
RILEM Bookseries ; 58
2024-09-20
8 pages
Article/Chapter (Book)
Electronic Resource
English
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