Biotechnological approaches in utilizing agro-waste for biofuel production: An extensive review on techniques and challenges

Rame, Rame; Purwanto, Purwanto; Sudarno, Sudarno

doi:10.1016/j.biteb.2023.101662

Cited by 10 publications

(3 citation statements)

References 183 publications

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“…Therefore, microbial oils, also called "single-cell oils" (SCOs) are emerging as alternative and renewable oil sources and as a viable and environmentally sustainable strategy. Moreover, when these biofuels are derived from inexpensive substrates, such as agro-industrial wastes, they become even more promising alternatives for liquid energy production [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

“…Vinasse is a waste from the rectification and distillation of ethanol, characterized by high sulfur levels, low pH (3.5-5), dark brown color, and pungent odor [5]. It is considered a highly polluting waste, especially when discharged into bodies of water and soil [2]. Another waste generated by the biofuel industry is crude glycerol, the primary by-product of biodiesel production.…”

Section: Introductionmentioning

confidence: 99%

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Valorization of Sugarcane Vinasse and Crude Glycerol for Single-Cell Oils Production by Rhodotorula glutinis R4: A Preliminary Approach to the Integration of Biofuels Industries for Sustainable Biodiesel Feedstock

Maza,

Barros,

Guillamón

et al. 2024

Fermentation

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Single-cell oils (SCOs) offer a promising alternative to conventional biodiesel feedstocks. The main objective of this work was to obtain SCOs suitable for biodiesel production from the oleaginous yeast Rhodotorula glutinis R4 using sugarcane vinasse from a local sugar-derived alcohol industry as the substrate. Additionally, crude glycerol from the local biodiesel industry was evaluated as a low-cost carbon source to replace expensive glucose and as a strategy for integrating the bioethanol and biodiesel industries for the valorization of both agro-industrial wastes. R4 achieved a high lipid accumulation of 88% and 60% (w/w) in vinasse-based culture media, containing 10% and 25% vinasse with glucose (40 g L−1), respectively. When glucose was replaced with crude glycerol, R4 showed remarkable lipid accumulation (40%) and growth (12.58 g L−1). The fatty acids profile of SCOs showed a prevalence of oleic acid (C18:1), making them suitable for biodiesel synthesis. Biodiesel derived from R4 oils exhibits favorable characteristics, including a high cetane number (CN = 55) and high oxidative stability (OS = 13 h), meeting international biodiesel standards (ASTMD6751 and EN14214) and ensuring its compatibility with diesel engines. R. glutinis R4 produces SCOs from vinasse and crude glycerol, contributing to the circular economy for sustainable biodiesel production.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Valorization of Sugarcane Vinasse and Crude Glycerol for Single-Cell Oils Production by Rhodotorula glutinis R4: A Preliminary Approach to the Integration of Biofuels Industries for Sustainable Biodiesel Feedstock

Maza,

Barros,

Guillamón

et al. 2024

Fermentation

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“…The modern approach is to convert this abundant, renewable, and unavoidable resource into value-added products. Several reviews that highlight the benefits and opportunities of turning corn crop wastes into profitable goods are available in the literature [ 2 , 5 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 ]. The potential uses of corn waste as raw materials in different industrial domains are briefly illustrated in Table S1 .…”

Section: Introductionmentioning

confidence: 99%

The Potential Valorization of Corn Stalks by Alkaline Sequential Fractionation to Obtain Papermaking Fibers, Hemicelluloses, and Lignin—A Comprehensive Mass Balance Approach

Puițel,

Bălușescu,

Balan

et al. 2024

Polymers

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The current study deals with an examination of strategies for the sequential treatment of corn stalks (CSs) in an integrated manner aiming to obtain papermaking fibers and to recover both lignin and hemicelluloses (HCs). Several pathways of valorization were experimentally trialed, focusing on getting information from mass balance analysis in an attempt to reveal the potential outcomes in terms of pulp yield, chemical composition, and papermaking properties such as tensile and burst strength. The raw lignin amounts and purity as well as separated hemicelluloses were also characterized. In this work, pulp yields in the range of 44–50% were obtained from CSs, while lignin and hemicelluloses yielded maximum values of 10 g/100 g of CS and 6.2 g/100 g of CS, respectively. Other findings of mass balance analysis evidenced that besides the papermaking pulp, the lignin and HCs also have interesting output values. The recovered lignin yield values were shown to be less than 50% in general, meaning that even if 67 to 90% of it is removed from CSs, only about half is recovered. The removal rates of hemicelluloses were found to be in the range of approx. 30 to 60%. About 15 to 25% of the original HCs could be recovered, and polysaccharides-based products with 67 to 75% xylan content could be obtained. Some key opinions were developed regarding how the mass balance could turn as a result of the chosen CS valorization set-up. The determined antioxidant activity showed that both lignin and hemicelluloses had interesting values for IC50.

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Microbe-assisted Agro-industrial Waste Valorisation for Green Energy Generation: A Sustainable Biorefinery Approach

Kouser,

Bharti,

Azam

et al. 2024

Industrial Microbiology and Biotechnology

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Biotechnological approaches in utilizing agro-waste for biofuel production: An extensive review on techniques and challenges

Cited by 10 publications

References 183 publications

Valorization of Sugarcane Vinasse and Crude Glycerol for Single-Cell Oils Production by Rhodotorula glutinis R4: A Preliminary Approach to the Integration of Biofuels Industries for Sustainable Biodiesel Feedstock

Valorization of Sugarcane Vinasse and Crude Glycerol for Single-Cell Oils Production by Rhodotorula glutinis R4: A Preliminary Approach to the Integration of Biofuels Industries for Sustainable Biodiesel Feedstock

The Potential Valorization of Corn Stalks by Alkaline Sequential Fractionation to Obtain Papermaking Fibers, Hemicelluloses, and Lignin—A Comprehensive Mass Balance Approach

Microbe-assisted Agro-industrial Waste Valorisation for Green Energy Generation: A Sustainable Biorefinery Approach

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