Conversion of Lignocellulose for Bioethanol Production, Applied in Bio-Polyethylene Terephthalate

Damayanti, Damayanti; Supriyadi, Didik; Amelia, Devita; Saputri, Desi Riana; Devi, Yuniar Luthfia Listya; Auriyani, Wika Atro; Wu, Ho‐Shing

doi:10.3390/polym13172886

Cited by 30 publications

(13 citation statements)

References 205 publications

(169 reference statements)

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“…In contrast, biological pretreatment is based on fungi [21] and enzymes [22][23][24][25]. The pretreatment step usually consists of solubilizing the hemicellulose structure and reducing the lignin composition of the biomass [23,26], which facilitates enzyme access to the polymers in the enzymatic hydrolysis stage of cellulose [27,28]. Enzymes are used to reduce the complex sugars present in the biomass, thereby increasing the concentration of simple sugars, such as glucose, galactose, arabinose, and xylose.…”

Section: Introductionmentioning

confidence: 99%

Bacterial Nanocellulose Derived from Banana Leaf Extract: Yield and Variation Factors

et al. 2021

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Bananas are one of the most important crops worldwide. However, a large amount of residual lignocellulosic biomass is generated during its production and is currently undervalued. These residues have the potential to be used as feedstock in bio-based processes with a biorefinery approach. This work is based on the valorization of banana leaf and has the following objectives (i) to determine the effect of certain physical and environmental factors on the concentration of glucose present in banana leaf extract (BLE), using a statistical regression model; (ii) to obtain Bacterial Nanocellulose (BNC), using BLE (70% v/v) and kombucha tea as fermentation medium. In addition, the physicochemical properties of BNC were evaluated by X-ray diffraction (XRD), Fourier transform infrared (FTIR), and thermogravimetric analysis (TGA). The results indicate that storage time, location, leaf color, and petiole type are factors related to BLE concentration, which is reduced by approximately 28.82% and 64.32% during storage times of five days. Regarding BNC biosynthesis, the results indicate that the highest yield, 0.031 g/g, was obtained at 21 days. Furthermore, it was determined that the highest production rate was 0.11 gL−1h−1 at 11 days of fermentation. By FTIR, it was determined that the purification step with NaOH (3M) should be carried out for approximately two hours. This research supports the development of a circular bioeconomy around the banana value chain, as it presents a way of bioprocessing residual biomass that can be used to produce bioproducts.

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Section: Introductionmentioning

confidence: 99%

Bacterial Nanocellulose Derived from Banana Leaf Extract: Yield and Variation Factors

et al. 2021

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“…Pyrolysis is a thermochemical degradation process; it can degrade the polymer compound at high temperatures without oxygen [ 75 , 76 , 77 ]. Non–catalytic pyrolysis is a standard technique for recycling large molecules of PP.…”

Section: Waste Plastic Recycling and Technologymentioning

confidence: 99%

Current Prospects for Plastic Waste Treatment

et al. 2022

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The excessive amount of global plastic produced over the past century, together with poor waste management, has raised concerns about environmental sustainability. Plastic recycling has become a practical approach for diminishing plastic waste and maintaining sustainability among plastic waste management methods. Chemical and mechanical recycling are the typical approaches to recycling plastic waste, with a simple process, low cost, environmentally friendly process, and potential profitability. Several plastic materials, such as polypropylene, polystyrene, polyvinyl chloride, high-density polyethylene, low-density polyethylene, and polyurethanes, can be recycled with chemical and mechanical recycling approaches. Nevertheless, due to plastic waste’s varying physical and chemical properties, plastic waste separation becomes a challenge. Hence, a reliable and effective plastic waste separation technology is critical for increasing plastic waste’s value and recycling rate. Integrating recycling and plastic waste separation technologies would be an efficient method for reducing the accumulation of environmental contaminants produced by plastic waste, especially in industrial uses. This review addresses recent advances in plastic waste recycling technology, mainly with chemical recycling. The article also discusses the current recycling technology for various plastic materials.

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“…Many researchers have used engineered microbes and have cultured them in biomass sugar solutions, such as glucose, xylose, mannose, galactose, and arabinose. The most commonly utilized microbes for ethanol production include Saccharomyces cerevisiae, Zymomonas mobilis, and Aspergillus niger [187]; (ii) separated hydrolysis fermentation (SHF) is a process where hydrolysis and fermentation are separated to produce bioethanol. SHF is a typical approach in which hydrolysis takes place first, followed by the fermentation process.…”

Section: Textile Recycling Using Enzymatic Hydrolysismentioning

confidence: 99%

“…This technique can lower the cost of the reactor and enzymes, two main roadblocks to low-cost biomass processing [192,193]; (v) submerged fermentation (SMF) is one of the fermentation techniques that focuses on enhancing cellulase production. It is a widely accepted fermentation process for the synthesis of industrial enzymes because it is easy to regulate all of the factors such as pH, temperature, and operational approaches [186,187].…”

Section: Textile Recycling Using Enzymatic Hydrolysismentioning

confidence: 99%

Possibility Routes for Textile Recycling Technology

et al. 2021

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The fashion industry contributes to a significant environmental issue due to the increasing production and needs of the industry. The proactive efforts toward developing a more sustainable process via textile recycling has become the preferable solution. This urgent and important need to develop cheap and efficient recycling methods for textile waste has led to the research community’s development of various recycling methods. The textile waste recycling process can be categorized into chemical and mechanical recycling methods. This paper provides an overview of the state of the art regarding different types of textile recycling technologies along with their current challenges and limitations. The critical parameters determining recycling performance are summarized and discussed and focus on the current challenges in mechanical and chemical recycling (pyrolysis, enzymatic hydrolysis, hydrothermal, ammonolysis, and glycolysis). Textile waste has been demonstrated to be re-spun into yarn (re-woven or knitted) by spinning carded yarn and mixed shoddy through mechanical recycling. On the other hand, it is difficult to recycle some textiles by means of enzymatic hydrolysis; high product yield has been shown under mild temperatures. Furthermore, the emergence of existing technology such as the internet of things (IoT) being implemented to enable efficient textile waste sorting and identification is also discussed. Moreover, we provide an outlook as to upcoming technological developments that will contribute to facilitating the circular economy, allowing for a more sustainable textile recycling process.

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Conversion of Lignocellulose for Bioethanol Production, Applied in Bio-Polyethylene Terephthalate

Cited by 30 publications

References 205 publications

Bacterial Nanocellulose Derived from Banana Leaf Extract: Yield and Variation Factors

Bacterial Nanocellulose Derived from Banana Leaf Extract: Yield and Variation Factors

Current Prospects for Plastic Waste Treatment

Possibility Routes for Textile Recycling Technology

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