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

Molecules ◽  
2020 ◽  
Vol 25 (9) ◽  
pp. 2113 ◽  
Author(s):  
Regiane Alves de Oliveira ◽  
Roland Schneider ◽  
Betânia Hoss Lunelli ◽  
Carlos Eduardo Vaz Rossell ◽  
Rubens Maciel Filho ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Sugar Beet ◽  
Animal Feed ◽  
Continuous Fermentation ◽  
Bacillus Coagulans ◽  
Sugar Beet Pulp ◽  
Waste Stream ◽  
Production Chain ◽  
Vast Number ◽  
Beet Pulp

Lactic acid is a high-value molecule with a vast number of applications. Its production in the biorefineries model is a possibility for this sector to aggregate value to its production chain. Thus, this investigation presents a biorefinery model based on the traditional sugar beet industry proposing an approach to produce lactic acid from a waste stream. Sugar beet is used to produce sugar and ethanol, and the remaining pulp is sent to animal feed. Using Bacillus coagulans in a continuous fermentation, 2781.01 g of lactic acid was produced from 3916.91 g of sugars from hydrolyzed sugar beet pulp, with a maximum productivity of 18.06 g L−1h−1. Without interfering in the sugar production, ethanol, or lactic acid, it is also possible to produce pectin and phenolic compounds in the biorefinery. The lactic acid produced was purified by a bipolar membrane electrodialysis and the recovery reached 788.80 g/L with 98% w/w purity.

scholarly journals Poly(Lactic Acid)–Poly(Butylene Succinate)–Sugar Beet Pulp Composites; Part I: Mechanics of Composites with Fine and Coarse Sugar Beet Pulp Particles

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2531
Author(s):  
Rodion Kopitzky
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Sugar Beet ◽  
Cell Structure ◽  
Sugar Beet Pulp ◽  
Poly Lactic Acid ◽  
Butylene Succinate ◽  
Fracture Patterns ◽  
Beet Pulp ◽  
The Impact

Sugar beet pulp (SBP) is a residue available in large quantities from the sugar industry, and can serve as a cost-effective bio-based and biodegradable filler for fully bio-based compounds based on bio-based polyesters. The heterogeneous cell structure of sugar beet suggests that the processing of SBP can affect the properties of the composite. An “Ultra-Rotor” type air turbulence mill was used to produce SBP particles of different sizes. These particles were processed in a twin-screw extruder with poly(lactic acid) (PLA) and poly(butylene succinate) (PBS) and fillers to granules for possible marketable formulations. Different screw designs, compatibilizers and the use of glycerol as a thermoplasticization agent for SBP were also tested. The spherical, cubic, or ellipsoidal-like shaped particles of SBP are not suitable for usage as a fiber-like reinforcement. In addition, the fineness of ground SBP affects the mechanical properties because (i) a high proportion of polar surfaces leads to poor compatibility, and (ii) due to the inner structure of the particulate matter, the strength of the composite is limited to the cohesive strength of compressed sugar-cell compartments of the SBP. The compatibilization of the polymer–matrix–particle interface can be achieved by using compatibilizers of different types. Scanning electron microscopy (SEM) fracture patterns show that the compatibilization can lead to both well-bonded particles and cohesive fracture patterns in the matrix. Nevertheless, the mechanical properties are limited by the impact and elongation behavior. Therefore, the applications of SBP-based composites must be well considered.

Biodegradable Composites from Sugar Beet Pulp and Poly(lactic acid)

2005 ◽  
Vol 53 (23) ◽  
pp. 9017-9022 ◽  
Author(s):  
Liu ◽  
Marshall L. Fishman ◽  
Kevin B. Hicks ◽  
Cheng-Kung Liu
Keyword(s):  
Lactic Acid ◽  
Sugar Beet ◽  
Sugar Beet Pulp ◽  
Poly Lactic Acid ◽  
Biodegradable Composites ◽  
Beet Pulp

scholarly journals Effects of chemical preservative and pressing of ensiled sugar-beet pulp on the quality of fermentation process

2011 ◽  
Vol 50 (No. 12) ◽  
pp. 553-560 ◽  
Author(s):  
P. Doležal ◽  
V. Pyrochta ◽  
J. Doležal
Keyword(s):  
Lactic Acid ◽  
Sugar Beet ◽  
Dry Matter ◽  
Fermentation Process ◽  
Ph Value ◽  
Sugar Beet Pulp ◽  
Dry Matter Content ◽  
Chemical Preservative ◽  
Beet Pulp

This study deals with effects of pressing of ensiled sugar-beet pulp and of application of a chemical preservative on the quality of fermentation process. The experimental silages had a better sensory evaluation than the control ones. In silages treated chemically with a mixture of acids, statistically significantly (P < 0.01) higher dry matter content, lowest pH value, the value of lactic acid and the lowest content of all acids in dry matter were found after 180 days of storage from the beginning of the experiment. The statistically significantly (P < 0.01) highest lactic acid content (43.39 ± 1.25 g/kg DM) was determined in the control pressed silage. The highest LA/VFA ratio (1.40 ± 0.18) was calculated for non-pressed experimental silage (D – 3 l/t of KEM). As compared with untreated control the highest percentage (P < 0.01) of lactic acid and of all fermentation acids was found out in silage D treated with 3 l/t of KEM (58.18 ± 0.47 g/kg DM). Undesirable butyric and propionic acids were not found in chemically treated silage samples (C, D, E, F). However, the highest (P < 0.01) contents of butyric acid (26.37 ± 0.91 g/DM) and propionic acid (4.58 ± 0.78 g/DM) were measured in untreated non-pressed silage samples (B). The highest (P < 0.01) contents of acetic acid and ethanol were found in control silage samples. The quality of these silages was evaluated as very low.  

Green Composites from Sugar Beet Pulp and Poly(lactic acid): Structural and Mechanical Characterization

2007 ◽  
Vol 1 (3) ◽  
pp. 323-330 ◽  
Author(s):  
L. S. Liu ◽  
V. L. Finkenstadt ◽  
C.-K. Liu ◽  
D. R. Coffin ◽  
J. L. Willett ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Sugar Beet ◽  
Mechanical Characterization ◽  
Sugar Beet Pulp ◽  
Poly Lactic Acid ◽  
Green Composites ◽  
Beet Pulp

scholarly journals An integrated biorefinery concept for conversion of sugar beet pulp into value-added chemicals and pharmaceutical intermediates

2017 ◽  
Vol 202 ◽  
pp. 415-431 ◽  
Author(s):  
Max Cárdenas-Fernández ◽  
Maria Bawn ◽  
Charlotte Hamley-Bennett ◽  
Penumathsa K. V. Bharat ◽  
Fabiana Subrizi ◽  
...  
Keyword(s):  
Sugar Beet ◽  
Animal Feed ◽  
Value Added ◽  
Sugar Beet Pulp ◽  
High Yield ◽  
Integrated Biorefinery ◽  
Physico Chemical ◽  
Beet Pulp ◽  
Commercial Yeast ◽  
The Uk

Over 8 million tonnes of sugar beet are grown annually in the UK. Sugar beet pulp (SBP) is the main by-product of sugar beet processing which is currently dried and sold as a low value animal feed. SBP is a rich source of carbohydrates, mainly in the form of cellulose and pectin, including d-glucose (Glu), l-arabinose (Ara) and d-galacturonic acid (GalAc). This work describes the technical feasibility of an integrated biorefinery concept for the fractionation of SBP and conversion of these monosaccharides into value-added products. SBP fractionation is initially carried out by steam explosion under mild conditions to yield soluble pectin and insoluble cellulose fractions. The cellulose is readily hydrolysed by cellulases to release Glu that can then be fermented by a commercial yeast strain to produce bioethanol at a high yield. The pectin fraction can be either fully hydrolysed, using physico-chemical methods, or selectively hydrolysed, using cloned arabinases and galacturonases, to yield Ara-rich and GalAc-rich streams. These monomers can be separated using either Centrifugal Partition Chromatography (CPC) or ultrafiltration into streams suitable for subsequent enzymatic upgrading. Building on our previous experience with transketolase (TK) and transaminase (TAm) enzymes, the conversion of Ara and GalAc into higher value products was explored. In particular the conversion of Ara into l-gluco-heptulose (GluHep), that has potential therapeutic applications in hypoglycaemia and cancer, using a mutant TK is described. Preliminary studies with TAm also suggest GluHep can be selectively aminated to the corresponding chiral aminopolyol. The current work is addressing the upgrading of the remaining SBP monomer, GalAc, and the modelling of the biorefinery concept to enable economic and Life Cycle Analysis (LCA).

Sugar beet pulp as biomass

2017 ◽  
pp. 29-32 ◽  
Author(s):  
Kazm Eber Özba ◽  
Özen Özboy Özba
Keyword(s):  
Sugar Beet ◽  
Animal Feed ◽  
Sugar Industry ◽  
Low Cost ◽  
Industrial Applications ◽  
Single Cell Protein ◽  
Sugar Beet Pulp ◽  
Raw Material ◽  
Cell Protein ◽  
Beet Pulp

The sugar beet industry produces considerable amounts of organic waste and by-products. Sugar beet pulp (SBP) is the residue that remains after sugar extraction. SBP is a lignocellulosic by-product of the sugar industry and generally used as animal feed at relatively low price. Instead of cattle feeding, SBP can be used as a raw material for industrial applications because it is low-cost and available in large amounts. Biomass is a clean and renewable energy source. The use of SBP for the production of ethanol, methanol, single cell protein, biofuels etc. is economically very attractive. This literature review evaluates the use of SBP as biomass.

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