A Simple Biorefinery Concept to Produce 2G-Lactic Acid from Sugar Beet Pulp (SBP): A High-Value Target Approach to Valorize a Waste Stream

Oliveira, Regiane Alves de; Schneider, Roland; Lunelli, Betânia Hoss; Rossell, Carlos Eduardo Vaz; Filho, Rubens Maciel; Venus, Joachim

doi:10.3390/molecules25092113

Cited by 27 publications

(11 citation statements)

References 46 publications

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“…It should be noted that lactic acid producing strains require complex nitrogen sources, such as yeast extract and peptone, which have been proven to improve lactic acid production [36,42]. Yeast extract is rich in vitamin B and essential amino acids that promote cell growth, however it considerably increases the cost of lactic acid production, which can account as high as the 38% of total upstream cost [9,26]. For this reason, many researchers have tried to evaluate alternative-and cheaper-nitrogen sources.…”

Section: Discussionmentioning

confidence: 99%

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Batch and Continuous Lactic Acid Fermentation Based on A Multi-Substrate Approach

et al. 2020

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The utilisation of waste materials and industrial residues became a priority within the bioeconomy concept and the production of biobased chemicals. The aim of this study was to evaluate the feasibility to continuously produce L-lactic acid from different renewable substrates, in a multi-substrate strategy mode. Based on batch experiments observations, Bacillus coagulans A534 strain was able to continuously metabolise acid whey, sugar beet molasses, sugar bread, alfalfa press green juice and tapioca starch. Additionally, reference experiments showed its behaviour in standard medium. Continuous fermentations indicated that the highest productivity was achieved when molasses was employed with a value of 10.34 g·L−1·h−1, while the lactic acid to sugar conversion yield was 0.86 g·g−1. This study demonstrated that LA can be efficiently produced in continuous mode regardless the substrate, which is a huge advantage in comparison to other platform chemicals.

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Section: Discussionmentioning

confidence: 99%

“…Several alternative substrates have been investigated to produce LA such as garden wastes [5], food wastes [6], organic municipal solid wastes [7,8] and lignocellulosic wastes [9,10] to name a few. However, in comparison to processes which use simple sugars, the valorisation of this kind of substrates comprises some extra challenges.…”

Section: Introductionmentioning

confidence: 99%

Batch and Continuous Lactic Acid Fermentation Based on A Multi-Substrate Approach

et al. 2020

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“…Sugar beet ( Beta vulgaris L.) is not only the raw material in the sugar industry but also an important global feed ( Chhikara et al, 2019 ; Li et al, 2020 ). The planted area accounts for about one-third of the global sugar crop planting area and provides 16% of the world’s sugar production ( Geng and Yang, 2015 ; de Oliveira et al, 2020 ). The cultivation area and yield of sugar beet are second only to sugar cane ( Mall et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

The response of sugar beet rhizosphere micro-ecological environment to continuous cropping

et al. 2022

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Continuous cropping can lead to increased soil-borne diseases of sugar beet (Beta vulgaris L.), resulting in a reduction in its yield quality. However, our understanding of the influence of continuous cropping on sugar beet-associated microbial community is limited and their interactions remain unclear. Here, we described and analyzed microbial diversity (N = 30) from three sugar beet belowground compartments (bulk soil, rhizosphere soil, and beetroot) using 16S rRNA and ITS sequencing. The continuous cropping showed lower bacterial alpha diversity in three belowground compartments and higher fungal alpha diversity in roots compared to the non-continuous cropping. There were significant differences in fungal community composition between the two groups. Compared with non-continuous cropping, continuous cropping increased the relative abundance of potentially pathogenic fungi such as Tausonia, Gilbellulopsis, and Fusarium, but decreased the relative abundance of Olpidium. The fungal flora in the three compartments displayed different keystone taxa. Fungi were more closely related to environmental factors than bacteria. Overall, changes in microbial diversity and composition under continuous cropping were more pronounced in the fungal communities, and the results of the study could guide development strategies to mitigate continuous crop adversity.

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“…Instead, the ESBP can be valorised and used to produce value-added products because it is composed mainly of cellulose, hemicellulose, and pectin. Currently, ESBP has been used as raw material to produce biogas [10], hydrogen [11], ethanol [12], succinic acid [13], lactic acid [14], or enzymes [15].…”

Section: Introductionmentioning

confidence: 99%

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

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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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A Simple Biorefinery Concept to Produce 2G-Lactic Acid from Sugar Beet Pulp (SBP): A High-Value Target Approach to Valorize a Waste Stream

Cited by 27 publications

References 46 publications

Batch and Continuous Lactic Acid Fermentation Based on A Multi-Substrate Approach

Batch and Continuous Lactic Acid Fermentation Based on A Multi-Substrate Approach

The response of sugar beet rhizosphere micro-ecological environment to continuous cropping

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

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