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The destruction of enzymes and bacteria during the spray-drying of milk and whey. II. The effect of the drying conditions

Daemen, A.L.H.; Stege, H.J. van der

Netherlands Milk and Dairy Journal 36(3): 211-229

1982

ISSN/ISBN: 0028-209X
Accession: 001135011
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Effects of drying conditions on the destruction of the enzymes and bacteria studied in Part I [DSA 44, 4205] were determined. Outlet air temp. had a marked effect, which was best expressed by a pseudo-z value (the temp. increase needed to obtain a 10-fold increase in destruction). Inlet air temp. had little effect. It was expected that destruction would increase with increases in particle size, but air in the particles masked this effect. Destruction of the bacteria (especially Serratia marcescens) appeared to be due in part to a non-thermal effect; this was confirmed by counting bacteria before and after films of inoculated conc. milk were dried under vacuum at room temp.

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Related References

Daemen, A.L.H.; Van-Der-Stege, H.J. 1982: The destruction of enzymes and bacteria during the spray drying of milk and whey 2. the effect of drying conditions Netherlands Milk and Dairy Journal 36(3): 211-230
Daemen, A.L.H.; Kruk, A.; Stege, H.J. van der 1983: The destruction of enzymes and bacteria during the spray-drying of milk and whey. III. Analysis of the drying process according to the stages in which the destruction occurs Netherlands Milk and Dairy Journal 37(4): 213-228
Daemen, A.L.H.; Kruk, A.; Van der Stege, H.J. 1983: The destruction of enzymes and bacteria during the spray-drying of milk and whey. 3. Analysis of the drying process according to the stages in which the destruction occurs - Décomposition des enzymes et des bactéries lors du séchage par atomisation du lait et du lactosérum. 3. Analyse du procédé de séchage, selon les stades auxquels la destruction a lieu Netherlands Milk and Dairy Journal 37(4): 213-228
Daemen, A.L.H. 1981: The destruction of enzymes and bacteria during the spray-drying of milk and whey. I. The thermoresistance of some enzymes and bacteria in milk and whey with various total solids contents Netherlands Milk and Dairy Journal 35(2): 133-144
Daemen, A.L.H. 1984: The destruction of enzymes and bacteria during the spray-drying of milk and whey. IV. A comparison of theoretical computed results concerning the destruction of phosphatase with those obtained experimentally Netherlands Milk and Dairy Journal 38(2): 55-70
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