Probiotic Yeast – Protecting Your Investment By Mark McFarland, Feed Ingredient Product Manager, Lallemand Animal Nutrition
IFF INTRODUCTION
Over recent decades the growing understanding of live yeasts’ mechanism and precise benefits, coupled with increased demand for natural feed additives has led to heightened popularity for supplementing animal feed with such probiotics. The viability of a probio- tic is a key parameter to ensure its metabolic activity once ingested by the animal. Many experts insist that probiotics must be alive and viable to exert an effect on the microflora within the digestive system. Indeed, several national authorities will only authorise a claim for performance (such as improved milk production or feed efficiency) when the probiotic microorganism is viable. For example, the European Commission considers microrganisms as probiotic feed additives only in their live form.
Like many other biological feed additives such as vitamins and enzymes, live yeast can be sensitive to external stresses such as heat, moisture, pressure or contact with cer- tain chemicals or trace elements (Fig1). These factors can impact yeast stability or metabolic activity and therefore, its efficacy. As a result, protection can be necessary for specific probiotics to ensure their stability through the feed pelletising process and during storage.
GERMANY
Fig. 1: Factors affecting viability of feed additives
LIVe Yeast Stability Trial - IFF Institute, Germany, 2017 The objective of the trial was to compare the stability and the resistance of a specific live yeast protection technology (TITAN coated beadlets) vs. other yeast sources (non-coated beadlets) under different pelleting conditions and over a 3-month storage duration.
PELLETING CONDITIONS: Equipment: Single press / Ring-die pelleting press Salmatec Outflow: 1000 Kg/hour Pellet diameter: 5 mm Die thicknesss: 50mm
Pellet T°C after die
Set Point 65°C 75°C 85°C
FEED USED:
Analytical constituents Crude Protein Crude Fat
Crude Fiber Metabolizable Energy LIVE YEAST SOURCES:
Portion in % 18.00% 3.40% 9.50%
6.7 MJ (Kg) Components and portion in %
Rape-seed (26.5%) - Rye (20%) - Palm Kernel cake (14.7%) - Rye Bran (11.7%) - Sugar beet molasses chips (8.5%) - Wheat Bran (6%) - Sugar Beat Molasses (4.5%) - Sunflower (3.5%) - Wheat (2.3%)
Measured by Sensor 65.2 - 62.7 74.9 - 76.7 85.1 - 86.2
Conditioner Steam (Kg/hr) 0.4 – 1.2 1.3 - 3.7
12.8 - 17.0
TITAN
BEADLET A
BEADLET B
BEADLET C
This trial compares TITAN protected live yeast with three commercially available yeast sources (Beadlets A, B & C). These four live yeast products are commercially described as a “thermo-resistant forms” by their producers. However, we can observe from the pictures that only TITAN offers a unique coating matrix.
PAGE 28 JULY/AUGUST 2019 FEED COMPOUNDER
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