Comparative study on the nutrient digestibility of diets containing brewer’s yeast products processed by different techniques fed to T-cannulated growing pigs

Liu, Qiang; Kang, Jia; Zhang, Ziheng; Zhou, Dingyong; Zhuang, Songlin

doi:10.1016/j.anifeedsci.2021.114981

Cited by 4 publications

(5 citation statements)

References 21 publications

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“…The AID and SID of CP and AA were lower in whole yeast, but for autolyzed yeast were within the range of published digestibility for brewer's yeast [10], torula's yeast [11], and yeast extract [12,13]. As the yeast cell has a rigid cell wall con taining mainly glucans and mannans and a minor structure of chitin and protein [23], the lack of endogenous enzymes in the small intestine against these component [8] might have lowered the digestibility of CP and AA in whole yeast.…”

Section: Discussionsupporting

confidence: 72%

“…The chemical composition of brewer's yeast is comparable to the nutrient composition of dehulled soybean meal [4]. Likewise, the AID and SID of CP and AA in brewer' s yeast [10] were within the ranges of those digestibility re ported in soybean meal [17]. The AID and SID of CP and almost all the AA in soybean meal in this study were close to the tabulated digestibility [17].…”

Section: Discussionsupporting

confidence: 68%

“…In the present study, the yeast products derived from sugarcane ethanol production had greater contents of fat and ash, but lower contents in CP and almost AA compared to those digestibilities in brewer’s yeast [ 10 , 17 ], torula’s yeast [ 11 ], single cell protein [ 17 ] and yeasts from grain ethanol co-products [ 20 ]. The variation in nutrient contents of the yeast products may have been due to the different substrates [ 4 ] and the specific yeast strains [ 7 , 11 ].…”

Section: Discussionmentioning

confidence: 99%

“…Numerous yeast products are commercially produced and supplemented in animal feed to improve growth performance and gut health function [ 4 ]. As standardized ileal digestibility (SID) of crude protein (CP) and AA has been widely accepted as a more suitable approach for bioavailability of CP and AA in feed ingredients [ 9 ], the SID of CP and AA have been reported for brewer’s yeast [ 10 ], torula yeast [ 11 ], yeast extract [ 12 , 13 ] and yeast products produced by the ethanol industry [ 14 ]. However, there is no information on the nutrient digestibility of yeast products derived from sugarcane ethanol production.…”

Section: Introductionmentioning

confidence: 99%

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Chemical composition and standardized ileal digestibility of crude protein and amino acid in whole yeast and autolyzed yeast derived from sugarcane ethanol production fed to growing pigs

et al. 2022

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Objective: This research determined the chemical composition and the apparent and standardized ileal digestibility (AID and SID) of crude protein (CP) and amino acids (AA) in whole yeast and autolyzed yeast derived from sugarcane ethanol production fed to growing pigs.Methods: Six growing pigs were randomly allocated in a replicated 3×3 Latin square design with 3 diets and 3 periods of 7 days each, resulting in a total of 6 experimental replications. Three assay diets were formulated using whole yeast, autolyzed yeast, or soybean meal as the sole sources of dietary CP and AA. Pigs were allowed to adapt to the assay diets for 5 days. Thereafter, ileal digesta samples were collected continuously for 8 hours on days 6 and 7.Results: There was no difference in the chemical composition between whole yeast and autolyzed yeast, but whole yeast had low digestibility of CP and AA due to the presence of a rigid cell wall. As conducting autolysis can induce cell wall damage, the AID and SID of CP and AA were greater in autolyzed yeast than in whole yeast.Conclusion: The information obtained on the SID of CP and AA in both yeast products can be used for the accurate estimation of the bioavailability of CP and AA in feed formulations. The yeast products derived from sugarcane ethanol production are an alternative protein source in pig diets.

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Section: Discussionsupporting

confidence: 72%

Section: Discussionsupporting

confidence: 68%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Chemical composition and standardized ileal digestibility of crude protein and amino acid in whole yeast and autolyzed yeast derived from sugarcane ethanol production fed to growing pigs

et al. 2022

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“…Particularly, if spent yeast is to be used as an additive for animal feed, the autolysis process plays an important role. In this case, disrupting yeast cell walls before feeding improves the availability of intracellular nutrients and facilitates their digestion and absorption [7,14]. In order to turn the incorporation of this additive in animal feeding profitable, the transformation process has to be as simple, fast, efficient and economical as possible.…”

Section: Yeast Cell Disruption Strategies-an Overviewmentioning

confidence: 99%

Induced Autolysis of Engineered Yeast Residue as a Means to Simplify Downstream Processing for Valorization—A Case Study

et al. 2023

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The objective of this work was to study the efficiency of different autolysis processes, combining different temperatures and pH conditions, when applied to a genetically engineered yeast residue. The determination of the supernatants’ dry weight showed that the autolysis time could be reduced to half, from 4 to 2 h, if the residue pH was increased from 5 to 8 at 50 °C (18.20% for 4 h and 18.70% for 2 h with a higher pH). This result allowed us to select a short autolysis time to proceed with the second part of the experiments. The application of this faster induced autolysis process enabled us to obtain supernatants with higher concentrations of relevant compounds, such as some amino acids and minerals. An increase in leucine (of around 7%), aspartic acid, valine, phenylalanine, isoleucine and serine (approximately 2%) was observed in the autolyzed samples, when compared to the untreated ones. Also, regarding minerals, the autolysis process allowed us to obtain significantly higher amounts of potassium in the treated samples’ supernatants. This work allowed the selection of a fast and low-cost induced autolysis process for synthetic biotechnology-derived spent yeast residue to attain a product rich in high-value compounds, which can be used in commercial applications, for example, as an animal feed additive.

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Remediation of sugarcane vinasse using Rhodotorula glutinis or Rhodotorula mucilaginosa: Biomass morphology and its potential technological applications

Alfaro,

Reyes,

Cristobal

et al. 2024

Biocatalysis and Agricultural Biotechnology

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Comparative study on the nutrient digestibility of diets containing brewer’s yeast products processed by different techniques fed to T-cannulated growing pigs

Cited by 4 publications

References 21 publications

Chemical composition and standardized ileal digestibility of crude protein and amino acid in whole yeast and autolyzed yeast derived from sugarcane ethanol production fed to growing pigs

Chemical composition and standardized ileal digestibility of crude protein and amino acid in whole yeast and autolyzed yeast derived from sugarcane ethanol production fed to growing pigs

Induced Autolysis of Engineered Yeast Residue as a Means to Simplify Downstream Processing for Valorization—A Case Study

Remediation of sugarcane vinasse using Rhodotorula glutinis or Rhodotorula mucilaginosa: Biomass morphology and its potential technological applications

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