Valorization of acai bio-residue as biomass for bioenergy: Determination of effective thermal conductivity by experimental approach, empirical correlations and artificial neural networks

Souto, Bernardo A.; Souza, Vitória L.C.; Perazzini, Maisa Tonon Bitti; Perazzini, Hugo

doi:10.1016/j.jclepro.2020.123484

Cited by 18 publications

(5 citation statements)

References 28 publications

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“…Since crop residues and agro-industrial wastes are lignocellulosic biomass composed of cellulose, lignin and hemicellulose, they can be used in the production of green energy and value-added products 18 instead of burning. A biorefinery approach is a coherent and viable substitute to synthesize diverse bioproducts from lignocellulosic biomass.…”

Section: Introductionmentioning

confidence: 99%

Valorization of rice straw, sugarcane bagasse and sweet sorghum bagasse for the production of bioethanol and phenylacetylcarbinol

Nunta

Techapun

Sommanee

et al. 2023

Sci Rep

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Open burning of agricultural residues causes numerous complications including particulate matter pollution in the air, soil degradation, global warming and many more. Since they possess bio-conversion potential, agro-industrial residues including sugarcane bagasse (SCB), rice straw (RS), corncob (CC) and sweet sorghum bagasse (SSB) were chosen for the study. Yeast strains, Candida tropicalis, C. shehatae, Saccharomyces cerevisiae, and Kluyveromyces marxianus var. marxianus were compared for their production potential of bioethanol and phenylacetylcarbinol (PAC), an intermediate in the manufacture of crucial pharmaceuticals, namely, ephedrine, and pseudoephedrine. Among the substrates and yeasts evaluated, RS cultivated with C. tropicalis produced significantly (p ≤ 0.05) higher ethanol concentration at 15.3 g L−1 after 24 h cultivation. The product per substrate yield (Yeth/s) was 0.38 g g-1 with the volumetric productivity (Qp) of 0.64 g L−1 h−1 and fermentation efficiency of 73.6% based on a theoretical yield of 0.51 g ethanol/g glucose. C. tropicalis grown in RS medium produced 0.303 U mL−1 pyruvate decarboxylase (PDC), a key enzyme that catalyzes the production of PAC, with a specific activity of 0.400 U mg−1 protein after 24 h cultivation. This present study also compared the whole cells biomass of C. tropicalis with its partially purified PDC preparation for PAC biotransformation. The whole cells C. tropicalis PDC at 1.29 U mL−1 produced an overall concentration of 62.3 mM PAC, which was 68.4% higher when compared to partially purified enzyme preparation. The results suggest that the valorization of lignocellulosic residues into bioethanol and PAC will not only aid in mitigating the environmental challenge posed by their surroundings but also has the potential to improve the bioeconomy.

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Section: Introductionmentioning

confidence: 99%

Valorization of rice straw, sugarcane bagasse and sweet sorghum bagasse for the production of bioethanol and phenylacetylcarbinol

Nunta

Techapun

Sommanee

et al. 2023

Sci Rep

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“…Furthermore, Melo et al (2021) explore the açaí seed as a source of lipids, fibers and phenolic compounds with antioxidant activity, highlighting the high content of dietary fiber (86%) and an interesting profile of unsaturated and saturated fatty acids, indicating potential applications in the cosmetic and food. The study by Souto et al (2021) highlights the importance of açaí waste as biomass for bioenergy, highlighting its effective thermal conductivity and how it affects the efficiency of the bioenergy process. Açaí waste, resulting from industrial processing, has physical and chemical characteristics that make it promising candidates for the production of thermal energy and the generation of compounds valued through thermochemical conversion processes.…”

Section: Açaí Residuesmentioning

confidence: 99%

Potential Application of Açaí Seed Waste in Biodegradable Polymeric Composites such as PBAT: a review regarding this issue

Costa,

Monteiro,

Oliveira

et al. 2024

JER

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“…Since crop residues and agro-industrial wastes are lignocellulosic biomass composed of cellulose, lignin and hemicellulose, they can be used in the production of green energy and value-added products 15 instead of burning. A biore nery approach is a coherent and viable substitute to synthesize diverse bioproducts from lignocellulosic biomass.…”

Section: Introductionmentioning

confidence: 99%

Valorization of rice straw, sugarcane bagasse and sweet sorghum bagasse for the production of bioethanol and phenylacetylcarbinol

Nunta

Techapun

Sommanee

et al. 2022

Preprint

View full text Add to dashboard Cite

Open burning of agricultural residues causes numerous complications including particulate matter pollution in the air, soil degradation, global warming and many more. Since they possess bio-conversion potential, agro-industrial residues including sugarcane bagasse (SCB), rice straw (RS), corncob (CC) and sweet sorghum bagasse (SSB) were chosen for the study. Yeast strains, Candida tropicalis, C. shehatae, Saccharomyces cerevisiae, and Kluyveromyces marxianus var. marxianus were compared for their production potential of bioethanol and phenylacetylcarbinol (PAC), an intermediate in the manufacture of crucial pharmaceuticals, namely, ephedrine, and pseudoephedrine. Among the substrates and yeasts evaluated, RS cultivated with C. tropicalis produced significantly (p ≤ 0.05) higher ethanol concentration at 15.3 g/L after 24 h cultivation. The product per substrate yield (Yeth/s) was 0.38 g/g with the volumetric productivity (Qp) of 0.64 g/L/h and fermentation efficiency of 73.6% based on a theoretical yield of 0.51 g ethanol/g glucose. C. tropicalis grown in RS medium produced 0.303 U/mL pyruvate decarboxylase (PDC), a key enzyme that catalyzes the production of PAC, with a specific activity of 0.400 U/mg protein after 24 h cultivation. This present study also compared the whole cells biomass of C. tropicalis with its partially purified PDC preparation for PAC biotransformation. The whole cells C. tropicalis PDC at 1.29 U/mL produced an overall concentration of 62.3 mM PAC, which was 68.4% higher when compared to partially purified enzyme preparation. The results suggest that the valorization of lignocellulosic residues into bioethanol and PAC will not only aid in mitigating the environmental challenge posed by their surroundings but also has the potential to improve the bioeconomy.

show abstract

Valorization of acai bio-residue as biomass for bioenergy: Determination of effective thermal conductivity by experimental approach, empirical correlations and artificial neural networks

Cited by 18 publications

References 28 publications

Valorization of rice straw, sugarcane bagasse and sweet sorghum bagasse for the production of bioethanol and phenylacetylcarbinol

Valorization of rice straw, sugarcane bagasse and sweet sorghum bagasse for the production of bioethanol and phenylacetylcarbinol

Potential Application of Açaí Seed Waste in Biodegradable Polymeric Composites such as PBAT: a review regarding this issue

Valorization of rice straw, sugarcane bagasse and sweet sorghum bagasse for the production of bioethanol and phenylacetylcarbinol

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