Bioconvertibility of mannan-containing polysaccharides to bioethanol: a comparative study of palm kernel cake and copra meal feedstocks

Antia, Ukponobong E.; Stephen, Nsikak U.; Onilude, A. A.; Udo, Itoro-obong M.; Amande, Tivkaa Joseph

doi:10.1007/s13399-021-01586-8

Cited by 6 publications

(7 citation statements)

References 25 publications

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“…In contrast, sugarcane bagasse is mainly composed of xylan, and coconut meal consists largely of mannan. These compositional differences are crucial for determining the potential applications of these agricultural by-products [39].…”

Section: Utilization Of Lignocellulosic Waste Residues: Approaches An...mentioning

confidence: 99%

“…Sugarcane bagasse, another significant agricultural by-product, has been examined for its potential in generating low degree of polymerization (DP) xylooligosaccharides, achieving optimal results at 200 • C with a 10 min reaction time [33]. Furthermore, the study on coconut meal, which is abundant in mannan polymers, under optimal conditions (a severity factor of 4.5) resulted in the production of oligosaccharides, predominantly within a DP range of 2 to 6 [39]. These investigations underscore the versatility of autohydrolysis in valorizing various lignocellulosic wastes into valuable oligosaccharides and enhancing our understanding of process optimization for different biomass sources.…”

Section: Autohydrolysismentioning

confidence: 99%

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Revolutionizing Renewable Resources: Cutting-Edge Trends and Future Prospects in the Valorization of Oligosaccharides

Chelliah,

Kim,

Park

et al. 2024

Fermentation

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Lignocellulosic wastes, primarily from agricultural by-products, are a renewable resource increasingly used in the sustainable production of oligosaccharides, significantly contributing to the growing bioeconomy. This innovative utilization of biological resources aligns with the global shift towards sustainable development, focusing on creating products such as food, feed, and bioenergy from renewable sources. Oligosaccharides, specialized carbohydrates, are synthesized either chemically or more eco-friendly, biologically. Biological synthesis often involves enzymes or whole-cell systems to transform lignocellulosic wastes into these valuable sugars. As functional food supplements, oligosaccharides play a crucial role in human and animal health. They serve as prebiotics, indigestible components that promote the proliferation of beneficial gut microbiota, especially within the colon. This positive impact on gut flora is essential for boosting the immune system and regulating physiological functions. Important prebiotics, including galactooligosaccharides (GOS), xylooligosaccharides (XOS), fructooligosaccharides (FOS), mannan-oligosaccharides (MOS), and isomaltooligosaccharides (IMOS), are produced through methods involving enzymes or the use of whole cells, with agricultural waste as substrates. Recent advancements focus on refining these biological processes for oligosaccharide synthesis using lignocellulosic substrates, emphasizing the principles of a circular bioeconomy, which promotes resource reuse and recycling. This review highlights the potential and challenges in the biological synthesis of oligosaccharides from renewable resources. It underscores the need for innovation in process optimization and commercialization strategies to fully exploit lignocellulosic wastes. This approach not only contributes to sustainable product development, but also opens new avenues for the profitable and environmentally friendly utilization of agricultural residues, marking a significant step forward in the bio-based industry.

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Section: Utilization Of Lignocellulosic Waste Residues: Approaches An...mentioning

confidence: 99%

Section: Autohydrolysismentioning

confidence: 99%

Revolutionizing Renewable Resources: Cutting-Edge Trends and Future Prospects in the Valorization of Oligosaccharides

Chelliah,

Kim,

Park

et al. 2024

Fermentation

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“…Nevertheless, mineral acids are less favorable due to drawbacks such as high levels of gypsum production, which hinders downstream processes and corrodes equipment, as well as inhibitory byproduct accumulation from sugar and lignin breakdown 12 . A prior study which compared alkali, dilute acid, and auto-hydrolysis pretreatments on PKC revealed that the highest inhibitory products, i.e., formic acid, furfural, and HMF, were present in both severe sulfuric acid and sodium hydroxide pretreatments 14 . The use of dilute oxalic acid pretreatment has been suggested as an alternative due to its efficacy in breaking down hemicellulose into monomeric sugars at relatively low concentrations, its non-inhibitory effect on glycolysis, its lower toxicity to microorganisms compared to sulfuric and acetic acids, its odorlessness, and its cost-effectiveness 15 .…”

Section: Introductionmentioning

confidence: 99%

Biotechnological enhancement of lactic acid conversion from pretreated palm kernel cake hydrolysate by Actinobacillus succinogenes 130Z

Rahim

Luthfi

Bukhari

et al. 2023

Sci Rep

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The aim of this study was to establish an improved pretreatment and fermentation method i.e. immobilized cells for high recovery of fermentable sugars from palm kernel cake (PKC) and its effects on fermentability performance by Actinobacillus succinogenes 130Z in the conversion of the fermentable sugar to lactic acid. The effects of oxalic acid concentrations (1–6% w/v) and residence times (1–5 h) on the sugar recovery were initially investigated and it was found that the highest mannose concentration was 25.1 g/L at the optimum hydrolysis conditions of 4 h and 3% (w/v) oxalic acid. The subsequent enzymatic saccharification of the pretreated PKC afforded the highest enzymatic digestibility with the recovered sugars amounting to 25.18 g/L and 9.14 g/L of mannose and glucose, respectively. Subsequently, the fermentability performance of PKC hydrolysate was evaluated and compared in terms of cultivation phases (i.e. mono and dual-phases), carbonate loadings (i.e. magnesium and sodium carbonates), and types of sugars (i.e. glucose and mannose). The highest titer of 19.4 g/L lactic acid was obtained from the fermentation involving A. succinogenes 130Z in dual-phase cultivation supplemented with 30 g/L of magnesium carbonate. Lactic acid production was further enhanced by using immobilized cells with coconut shell-activated carbon (CSAC) of different sizes (A, B, C, and D) in the repeated batch cultivation of dual-phase fermentation producing 31.64 g/L of lactic acid. This work sheds light on the possibilities to enhance the utilization of PKC for lactic acid production via immobilized A. succinogenes 130Z.

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“…Similarly, copra meal has been evaluated for its potential use in bio‐conversion to ethanol and also for the production of biogas 7 . Up to 45% oligosaccharides, mainly mannobiose and mannotriose, obtained with copra meal were hydroyzed using a commercial enzyme, Pectinex Ultra SP‐L 8 .…”

Section: Introductionmentioning

confidence: 99%

“…Similarly, copra meal has been evaluated for its potential use in bio-conversion to ethanol and also for the production of biogas. 7 Up to 45% oligosaccharides, mainly mannobiose and mannotriose, obtained with copra meal were hydroyzed using a commercial enzyme, Pectinex Ultra SP-L. 8 Additionally, copra meal hydrolysate, which contains mannan polysaccharide produced by the enzyme mannanase, shows promise as a prebiotic in food and feed applications. 9 The use of fermented copra meal as a plant protein source in fish feed has also been studied.…”

mentioning

confidence: 99%

Converting coconut meal into biothermoplastics for industrial applications

Reddy,

Guna,

et al. 2023

Biofuels Bioprod Bioref

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We present a simple approach to convert coconut (copra) oil cake into biothermoplastics with properties that are suitable for replacing synthetic polymer‐based plastics in current use. About 1.9 million tons of copra meal are generated ever year as coproducts and are available at $0.50–$0.60 per kilogram, making it a renewable, sustainable and low‐cost raw material. Despite containing proteins, carbohydrates and oil, there are limited non‐food applications of oil meals since most oil meals are typically non‐thermoplastic and hence difficult to be processed into bioproducts. In this study, we report the processing of copra meal into biothermoplastics in the presence of various plasticizers, heat and pressure. Compression molded films and bioproducts were developed from copra meal by heating at 130°C in the presence of glycerol, coconut oil or cashew shell oil as plasticizer. The films obtained had tensile strength of up to 4.4 MPa and were inherently stable in water. A one‐step crosslinking with citric acid was done to further improve the strength and stability of the films. With large availability at low cost, copra meal provides an opportunity to develop low‐cost, biodegradable, edible and innovative bioproducts that have the potential to replace the synthetic polymer‐based plastics in current use, particularly single‐use plastics.

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Bioconvertibility of mannan-containing polysaccharides to bioethanol: a comparative study of palm kernel cake and copra meal feedstocks

Cited by 6 publications

References 25 publications

Revolutionizing Renewable Resources: Cutting-Edge Trends and Future Prospects in the Valorization of Oligosaccharides

Revolutionizing Renewable Resources: Cutting-Edge Trends and Future Prospects in the Valorization of Oligosaccharides

Biotechnological enhancement of lactic acid conversion from pretreated palm kernel cake hydrolysate by Actinobacillus succinogenes 130Z

Converting coconut meal into biothermoplastics for industrial applications

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