Sustainable and green pretreatment strategy of Eucheuma denticulatum residues for third-generation l-lactic acid production

Chai, None Choi Yan; Tan, Inn Shi; Foo, Henry Chee Yew; Lam, Man Kee; Tong, Kevin Tian Xiang; Lee, Keat Teong

doi:10.1016/j.biortech.2021.124930

Cited by 27 publications

(8 citation statements)

References 42 publications

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“…The pretreatment reduces the crystallinity and degree of polymerization, leading to efficient interaction of enzymes or microbes and enhance enzymatic digestibility of the cellulose. Several reports have revealed that pretreatment of biomass enhanced the production yield in contrast to untreated biomass [31,[34][35][36][37][38]. The complex sugars extracted from algae biomass is further degraded into monosaccharides through hydrolysis process (e.g.…”

Section: Perspective On Novel Cascading Macroalgae Biorefinery Systemsmentioning

confidence: 99%

“…The details of some studies of the production of lactic acid from algae are tabulated in Table 3. As an example, both components (Carrageenan and Cellulose) in red algae, Eucheuma denticulatum are good sources to produce lactic acid as they contain high concentration of reducing sugar after hydrolysis steps [37,38]. Furthermore, to promote the zero-waste concept in biorefinery processes, the remnant biomass from the lactic acid production can be utilized for algae-biochar production through pyrolysis process.…”

Section: Perspective On Novel Cascading Macroalgae Biorefinery Systemsmentioning

confidence: 99%

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Review - New prospect of algae for sustainable production of lactic acid: Opportunities and challenges

Cheah

Chai

Tan

et al. 2022

PROGEE

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Heavily dependent on fossil fuels has resulted in severe environmental impacts such as exhaustion of natural resources, contamination of the environment, and excessive greenhouse emission. Therefore, intensive research works to explore alternative and sustainable energy sources has been escalated in recent years. In this regard, algae have been exploited as the third-generation of biomass to produce biofuels and biochemicals. Nevertheless, research to produce lactic acid from algae is still limited in the literature. Hence, this review is aimed to provide an extensive mechanism of deriving lactic acid from algae biomass, started with the discussion of the types of algae, the involvement of other microorganisms, fermentation technology, as well as the bottleneck of the technology. The evolution of different biomass feedstocks for lactic acid production is addressed in the initial section of this paper, followed by a discussion on the perspective of novel cascading algae biorefinery systems to truly reveal the potential of algae-based lactic acid production in a sustainable manner.

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Section: Perspective On Novel Cascading Macroalgae Biorefinery Systemsmentioning

confidence: 99%

Section: Perspective On Novel Cascading Macroalgae Biorefinery Systemsmentioning

confidence: 99%

Review - New prospect of algae for sustainable production of lactic acid: Opportunities and challenges

Cheah

Chai

Tan

et al. 2022

PROGEE

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“…In recent decades, optically pure lactic acid ( l - or d -isomer) has attracted worldwide attention as a building block for the polylactic acid (PLA: PLLA and PDLA) manufacture [ 4 ]. PLA is one of the most eco-friendly biodegradable polymers and is generally recognized as a green alternative to traditional petroleum-derived plastics [ 5 , 6 ]. However, the application of PLLA and PDLA is still limited due to their mechanical and thermal properties [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

d-Lactic acid production from agricultural residues by membrane integrated continuous fermentation coupled with B vitamin supplementation

Cui

Zhao

et al. 2022

Biotechnol Biofuels

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Background d-Lactic acid played an important role in the establishment of PLA as a substitute for petrochemical plastics. But, so far, the d-lactic acid production was limited in only pilot scale, which was definitely unable to meet the fast growing market demand. To achieve industrial scale d-lactic acid production, the cost-associated problems such as high-cost feedstock, expensive nutrient sources and fermentation technology need to be resolved to establish an economical fermentation process. Results In the present study, the combined effect of B vitamin supplementation and membrane integrated continuous fermentation on d-lactic acid production from agricultural lignocellulosic biomass by Lactobacillus delbrueckii was investigated. The results indicated the specific addition of vitamins B1, B2, B3 and B5 (VB1, VB2, VB3 and VB5) could reduce the yeast extract (YE) addition from 10 to 3 g/l without obvious influence on fermentation efficiency. By employing cell recycling system in 350 h continuous fermentation with B vitamin supplementation, YE addition was further reduced to 0.5 g/l, which resulted in nutrient source cost reduction of 86%. A maximum d-lactate productivity of 18.56 g/l/h and optical purity of 99.5% were achieved and higher than most recent reports. Conclusion These findings suggested the novel fermentation strategy proposed could effectively reduce the production cost and improve fermentation efficiency, thus exhibiting great potential in promoting industrial scale d-lactic acid production from lignocellulosic biomass. Graphical Abstract

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“…Lactic acid is usually produced through biotechnological processes by the action of lactic acid bacteria [7]. The main drawback of this process at an industrial scale is the great influence that the raw material has on its economy, due to the use of simple sugars that allow the production of a pure product and reduce purification costs [8]. Recently, lignocellulosic biomasses have been used as a low-cost alternative.…”

Section: Introductionmentioning

confidence: 99%

Effect of Several Pretreatments on the Lactic Acid Production from Exhausted Sugar Beet Pulp

Marzo

Díaz

Caro

et al. 2021

Foods

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Exhausted sugar beet pulp (ESBP), a by-product of the sugar industry, has been used as a substrate to produce lactic acid (LA). Due to the fact that ESBP contains a high percentage of pectin and hemicellulose, different pretreatments were studied to solubilize them and to facilitate the access to cellulose in the subsequent enzymatic hydrolysis. Several pretreatments were studied, specifically biological, oxidant with alkaline hydrogen peroxide (AHP), and thermochemical with acid (0.25, 0.5, or 1% w/v of H2SO4). Pretreated ESBP was enzymatically hydrolysed and fermented with the strain Lactiplantibacillus plantarum for LA production. The hydrolysis was carried out with the commercial enzymes Celluclast®, pectinase, and xylanase, for 48 h. After that, the hydrolysate was supplemented with yeast extract and calcium carbonate before the bacteria inoculation. Results showed that all the pretreatments caused a modification of the fibre composition of ESBP. In most cases, the cellulose content increased, rising from 25% to 68% when ESBP was pretreated thermochemically at 1% w/v H2SO4. The production of LA was enhanced when ESBP was pretreated thermochemically. However, it was reduced when biological and AHP pretreatments were applied. In conclusion, thermochemical pretreatment with 1% w/v H2SO4 had a positive impact on the production of LA, increasing its concentration from 27 g/L to 50 g/L.

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Sustainable and green pretreatment strategy of Eucheuma denticulatum residues for third-generation l-lactic acid production

Cited by 27 publications

References 42 publications

Review - New prospect of algae for sustainable production of lactic acid: Opportunities and challenges

Review - New prospect of algae for sustainable production of lactic acid: Opportunities and challenges

d-Lactic acid production from agricultural residues by membrane integrated continuous fermentation coupled with B vitamin supplementation

Effect of Several Pretreatments on the Lactic Acid Production from Exhausted Sugar Beet Pulp

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