Sugar Beet Pulp as a Biorefinery Substrate for Designing Feed (original) (raw)
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Using of Sugar Beet Pulp By-Product in Farm Animals Feeding
Sugar beet pulp is a by-product from the processing of sugar beets into sugar. Beet pulp is extracted grounded sugar beet. It is used as livestock feed and it can be fed fresh, dried and ensiled (fermented beet pulp). Sugar beet pulp is a by-product from the processing of sugar beet which is used as fodder for cattle and other livestock. It is supplied either as dried flakes or as compressed pellets. Sugar beet pulp is a highly palatable feed with good energy levels. Sugar beet pulp is low in sugar and other non-structural carbohydrates. Contains highly digestible fibre which is suited to ruminants as it maintains rumen condition and encourages acetate production. It has a high liquid absorbency and can, therefore, be used as a silage additive to retain the feed value from effluent. Another by-product from the processing of raw sugar cane is cane molasses. This is usually mixed with the sugar beet pulp to form molasses sugar beet when it is dried and pressed and distributed as shreds or pellets. The fibrous residues of sugar beet comprise mainly cellulose, which is highly digestible. Thus when fed with an appropriate supplement of degradable protein, sugar beet is an exceptionally suitable feed for ruminants, helping to promote optimum rumen conditions and boosting milk production. After the sugar has been extracted from sugar beets, the fibrous portion of the sugar beet is dehydrated. Dried beet pulp shreds have a very low bulk density so are often processed into pellets or cubes for transport. Both shreds and pelleted /cubed beet pulp is used in animals feed. Despite being called sugar beet pulp, beet pulp contributes very little sugar to the diet. Beet pulp, which commonly is used in beef cattle diets as a supplement or roughage replacement in finishing diets, is the beet shreds left over from processing. This feed is high in energy and fiber. Beet pulp is supplied either as dried flakes or as compressed pellets. Despite being a byproduct of sugar beet processing, beet pulp itself is low in sugar and other non structural carbohydrates, but high in energy and fiber and contains 0.8 % calcium and 0.5 % phosphorus.
Faraday discussions, 2017
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, t...
E3S Web of Conferences
The sugar beet pulp from the sugar production is, thanks to the easily assimilable carbohydrate content, an important source of feed, especially for polygastric animals. Its efficiency in terms of assimilation and biological effect can be substantially improved by the addition of macroelements (Ca, Mg, P) and microelements (Zn, Co, Fe, Mn, Cu). These elements react with the sugar beet pulp compounds to form specific chelates. In order to preserve and maintain the nutritional value of the premix, the realization process involves a drying operation. In view of this, experiments have been carried out to determine the maximum moisture content that ensures preservation and optimum drying conditions. This paper presents how the percentage of micro-and macro-elements used and the drying temperature influence the drying speed of the premix
Sustainable technologies and valuable new polysaccharide-based products from sugar beet pulp
More effective utilization of sugar beet pulp generated from beet sugar processing can improve the economic viability of U.S. beet sugar production. Dried pulp pellet and shreds provide a nutritious and valuable animal feed co-product from pulp for both local and export markets. However, the future of such markets may be threatened by increased availability of alternative feed materials from grain-based bioethanol production and customer concern for beet pulp derived from genetically modified plants that are being developed and pending commercial release. Beet pulp represents a largely untapped source of cell wall polysaccharides such as pectin that can be recovered and converted into higher-value biobased products. New biobased products are therefore sought from beet pulp to generate more revenue for growers and processors and to replace imported and/or petroleum-based products. Research on our CRIS (Official ARS/USDA Research) project is being conducted toward developing fundamental knowledge of the enzyme and polysaccharide components of the sugar beet cell wall; creating innovative new functional food, feed, and non-food biomedical and industrial bioproducts; and establishing efficient and sustainable conversion processes for their isolation and production. Our specific objectives, capabilities, and accomplishments are summarized in this report.
Molecules
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.
Effects of Enzyme and Solids Loading on Sugar Beet Pulp Hydrolysis
The commercial enzymes Viscozyme and Pectinex were tested separately and in combinations to determine their effect on pectin, hemicellulose, and cellulose hydrolysis of sugar beet pulp (SBP). Use of each product separately resulted in high levels of SBP hydrolysis, and no synergistic effects were found when they were used in combination. Viscozyme treatments showed higher levels of hemicellulose, pectin, and cellulose hydrolysis. Hydrolysis yields from hemicellulose and pectin in Pectinex treatments were 7% to 9% lower than in Viscozyme treatments; levels of cellulose hydrolysis were similar except that Pectinex treatments had a significantly higher percentage of cellobiose and correspondingly lower glucose. Increasing the solids loading from 10% to 16% in a batch process increased hydrolyzate sugar concentrations but decreased yields (g sugar g-1 SBP). Adding SBP in a fed-batch process did not improve SBP hydrolysis yields over the batch process.
Conversion of Exhausted Sugar Beet Pulp into Fermentable Sugars from a Biorefinery Approach
Foods, 2020
In this study, the production of a hydrolysate rich in fermentable sugars, which could be used as a generic microbial culture medium, was carried out by using exhausted sugar beet pulp pellets (ESBPPs) as raw material. For this purpose, the hydrolysis was performed through the direct addition of the fermented ESBPPs obtained by fungal solid-state fermentation (SSF) as an enzyme source. By directly using this fermented solid, the stages for enzyme extraction and purification were avoided. The effects of temperature, fermented to fresh solid ratio, supplementation of fermented ESBPP with commercial cellulase, and the use of high-solid fed-batch enzymatic hydrolysis were studied to obtain the maximum reducing sugar (RS) concentration and productivity. The highest RS concentration and productivity, 127.3 g·L−1 and 24.3 g·L−1·h−1 respectively, were obtained at 50 °C and with an initial supplementation of 2.17 U of Celluclast® per gram of dried solid in fed-batch mode. This process was ca...
Integrating sugar beet pulp storage, hydrolysis and fermentation for fuel ethanol production
2012
Sugar beet pulp (SBP) as received has a fairly high moisture content of 75-85%, which makes SBP storage a challenge. Ensilage was studied over 90 days and was found to effectively preserve SBP without lactic acid bacterium inoculation. Higher packing density yielded a slightly better silage quality. Ensilage improved sugar yield upon enzymatic hydrolysis of ensiled SBP washed with water. However, neither washing nor sterilization improved ethanol production from ensiled SBP using Escherichia coli KO11, suggesting ensiled SBP could be used directly in fermentation. The ethanol yield from ensiled SBP was nearly 50% higher than raw SBP. Fed-batch fermentation obtained approximately 30% higher ethanol yield than batch. Fed-batch could also be carried out at 12% solid loading with a 50% lower enzyme dosage compared to batch at the same solid loading, indicating opportunities to improve the economics of SBP conversion into liquid fuels.
Sugar Beet Pulp as Raw Material for the Production of Bioplastics
Fermentation
The production of bioplastics from renewable materials has gained interest in recent years, due to the large accumulation of non-degradable plastic produced in the environment. Here, sugar beet pulp (SBP) is evaluated as a potential raw material for the production of bioplastics such as polylactic acid (PLA) and polyhydroxyalkanoates (PHAs). SBP is a by-product obtained in the sugar industry after sugar extraction from sugar beet, and it is mainly used for animal feed. It has a varied composition consisting mainly of cellulose, hemicellulose and pectin. Thus, it has been used to produce different value-added products such as methane, hydrogen, pectin, simple sugars, ethanol, lactic acid and succinic acid. This review focuses on the different bioprocesses involved in the production of lactic acid and PHAs, both precursors of bioplastics, from sugars derived from SBP. The review, therefore, describes the pretreatments applied to SBP, the conditions most frequently used for the enzymat...