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ULTRAFILTRATION-THERMISATION OF MILK ON THE FARM: BACTERIOLOGICAL ASPECTS.

ULTRAFILTRATION-THERMISATION DU LAIT A LA PRODUCTION: ASPECTS BACTERIOLOGIQUES.

Author(s) : BENARD S., MAUBOIS J. L., TARECK A.

Type of article: Article

Summary

THE CONCENTRATION OF RAW MILK BY ULTRAFILTRATION RESULTED IN A FACTOR OF MULTIPLICATION BY 2.8 TIMES OF MESOPHILIC AND PSYCHROTROPHIC AEROBICS. THE ACTUAL MULTIPLICATION WAS 1.4 TIMES. THERMAL TREATMENT [72K/15S (72 DEGC/15S)] RESULTED IN A LOG REDUCTION RANGING BETWEEN 2 AND 3 (1,000 CFU/ML IN THERMISED RETENTATE). THE DEVELOPMENT OF FLORA DEPENDS ON STORAGE TEMPERATURE [275, 277 AND 279K (2, 4 AND 6 DEGC)] AND STORAGE TIME (1 TO 7 DAYS). BACTERIAL GROWTH RANGED BETWEEN 0.2 LOG/DAY (275K) AND 1 LOG/DAY (279K). LAG PHASE TIMES RANGED BETWEEN 24 HRS (279K) AND 72 HRS (275K). THE ACCUMULATION OF FOUR, THEN EIGHT CONSECUTIVE MILKINGS OF THERMISED RETENTATES RESULTED IN MESOPHILIC AEROBIC FLORA OF ABOUT 5,000 CFU/ML.

Details

  • Original title: ULTRAFILTRATION-THERMISATION DU LAIT A LA PRODUCTION: ASPECTS BACTERIOLOGIQUES.
  • Record ID : 1982-1634
  • Languages: French
  • Source: Hygiène de la Viande et du Lait - vol. 61 - n. 608
  • Publication date: 1981/09
  • Document available for consultation in the library of the IIR headquarters only.

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