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- Title
Effect of extruding on microbial indicators of feed mixtures.
- Authors
Trakalo, Tetiana; Shapovalenko, Oleg; Yaniuk, Tetiana; Sharan, Andrii
- Abstract
Introduction. To determine the quality of feed mixtures containing flax extract from serum was investigated microbiological parameters after extruding feed mixtures of different prescription in storage. Materials and methods. Studied feed mixture of wheat, corn and flax extract on serum basis of different interest amount. Linen extract obtained by extraction in an active pulsation dispersant mixture is mixed and aperture extruding a temperature - 110-120 °C, pressure - 4.2 MPa, which allows almost completely disinfect it. We investigated the change of microbiological feed mixtures during storage. The test samples were placed in cloth bags and stored for 2 months at 0 °C (refrigerator), + 20 °C (thermostat) and relative humidity - 45%. Results and discussion. Humidity grain mixtures for extrusion samples is within 16.8-17.6%, after extruding from 13.3 to 13.5%, and over the shelf life of unchanged at +20 °C and a relative humidity of 45% designs humidity changes during storage of 13.3-13.5% tо 15.3-16.1%. Changing humidity extruded feed mixture to a large extent dependent on storage temperature and not on the number entered flax extract from the serum of the mixture. Comparing the conditions and shelf life, it can be said that the change in humidity extruded feed mixture to a large extent dependent on storage temperature and not on the number entered flax extract from the serum of the mixture. At the beginning and end of storage extruded forage mixture, characterized by relatively low levels of microbiological contamination. Not revealed the following groups of microorganisms as Escherichia coli (BGKP) pathogens. Total mesophilic aerobic and facultative anaerobic microorganisms (MAFAM) in all samples of mixtures is within acceptable limits (no more than 5·105 CFU/g). Analysis of colonies of mesophilic aerobic microorganisms on agar peptidemeat found that they are characterized by large, small and medium size, white and yellow color, smooth and rough edges. The bulk of the microorganisms is coccoid bacteria whose cells are placed singly or clusters. The main morpho types bacteria isolated from grain extrudate is aerobic bacteria. Conclusion. We recommend using extrusion process as an effective way to improve health quality extruded feed mixtures because it provides a nearly sterile product.
- Subjects
FEED quality; FEED microbiology; EXTRUSION cooking
- Publication
Ukrainian Journal of Food Science, 2016, Vol 4, Issue 1, p58
- ISSN
2310-1008
- Publication type
Article