Valorisation of fungal hydrolysates of exhausted sugar beet pulp for lactic acid production

2020 ◽  
Author(s):  
Cristina Marzo ◽  
Ana Belén Díaz ◽  
Ildefonso Caro ◽  
Ana Blandino
Keyword(s):  
Lactic Acid ◽  
Sugar Beet ◽  
Acid Production ◽  
Lactic Acid Production ◽  
Sugar Beet Pulp ◽  
Beet Pulp

Feasibility of exhausted sugar beet pulp as raw material for lactic acid production

2020 ◽  
Vol 100 (7) ◽  
pp. 3036-3045
Author(s):  
Ana Belén Díaz ◽  
Claudia González ◽  
Cristina Marzo ◽  
Ildefonso Caro ◽  
Ana Blandino
Keyword(s):  
Lactic Acid ◽  
Sugar Beet ◽  
Acid Production ◽  
Lactic Acid Production ◽  
Sugar Beet Pulp ◽  
Raw Material ◽  
Beet Pulp

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

Foods ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 2414
Author(s):  
Cristina Marzo ◽  
Ana Belén Díaz ◽  
Ildefonso Caro ◽  
Ana Blandino
Keyword(s):  
Lactic Acid ◽  
Sugar Beet ◽  
Positive Impact ◽  
Sugar Industry ◽  
Lactic Acid Production ◽  
Sugar Beet Pulp ◽  
Cellulose Content ◽  
Thermochemical Pretreatment ◽  
Commercial Enzymes ◽  
Beet Pulp

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.

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 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.

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