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BIOLOGICAL EVALUATION of A HEAT TRANSFER SIMULATION FOR STERILIZING LOW‐ACID LARGE PARTICULATE FOODS FOR ASEPTIC PACKAGING
Author(s) -
SEGNER W. P.,
RAGUSA T. J.,
MARCUS C. L.,
SOUTTER E. A.
Publication year - 1989
Publication title -
journal of food processing and preservation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.511
H-Index - 48
eISSN - 1745-4549
pISSN - 0145-8892
DOI - 10.1111/j.1745-4549.1989.tb00105.x
Subject(s) - aseptic processing , sterilization (economics) , food science , heat transfer , heat exchanger , clostridium sporogenes , chemistry , materials science , pulp and paper industry , biology , mechanical engineering , thermodynamics , clostridium , physics , foreign exchange , genetics , bacteria , monetary economics , economics , foreign exchange market , engineering
A biological procedure was devised to evaluate de Ruyter and Brunet's heat transfer computer simulation for sterilizing particulate foods in a swept surface heat exchanger (SSHE). Turkey cubes measuring 12.7 mm were inoculated with spores of Clostridium sporogenes PA3679, using a so‐called “knotted string” method. Inoculated cubes were introduced into a viscous starch medium and thermally processed in a SSHE to a fractional survivor endpoint. Processed product was packaged aseptically, incubated and examined for survivors. Biological sterilization values calculated from the inoculated packs support the validity of the simulation. Also, a novel method was devised to measure particle residence times in hold tubes using electro‐magnetic induction.