Determination of lethality during aseptic processing of particulate foods

K. P. Sandeep, C. A. Zuritz, Virendra Puri

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Experimental and modelling studies were conducted to ascertain the effect of viscosity, flow rate, particle size, particle concentration on the residence time distribution of particles during non-Newtonian flow in a holding tube. Another program was written to determine the temperature distribution within particles during flow in the heat exchanger, holding tube, and cooling section of an aseptic processing system. Based on this, the lethality of different processes was determined depending on the target microorganism. The extent of nutrient retention and enzyme destruction was also computed. Experimental studies indicated that an increase in viscosity, flow rate or particle concentration decreased the mean and minimum residence time while an increase in particle concentration resulted in the opposite effect. In addition, it was found that an increase in viscosity widened the residence time distribution (RTD), while an increase in flow rate, particle size or particle concentration narrowed the RTD. Process lethality decreased from 8.0 to 2.3 mins when particle size increased from 1.0 to 1.5 cm; decreased from 5.9 to 4.0 mins when particle concentration increased from 30 to 50%; and decreased from 6.5 to 3.0 mins when the heat transfer coefficient decreased from 300 to 200 W/m2-K.

Original languageEnglish (US)
Pages (from-to)11-17
Number of pages7
JournalFood and Bioproducts Processing: Transactions of the Institution of of Chemical Engineers, Part C
Volume77
Issue number1
DOIs
StatePublished - Jan 1 1999

Fingerprint

Residence time distribution
Food Handling
aseptic conditions
particulates
Particle size
Particle Size
Flow rate
Viscosity
Processing
Non Newtonian flow
Hot Temperature
particle size
viscosity
Microorganisms
Heat transfer coefficients
Nutrients
Heat exchangers
Temperature distribution
Enzymes
Cooling

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Food Science
  • Biochemistry
  • Chemical Engineering(all)

Cite this

@article{70b4a65ec4bc42adbca3bae4f77f7a43,
title = "Determination of lethality during aseptic processing of particulate foods",
abstract = "Experimental and modelling studies were conducted to ascertain the effect of viscosity, flow rate, particle size, particle concentration on the residence time distribution of particles during non-Newtonian flow in a holding tube. Another program was written to determine the temperature distribution within particles during flow in the heat exchanger, holding tube, and cooling section of an aseptic processing system. Based on this, the lethality of different processes was determined depending on the target microorganism. The extent of nutrient retention and enzyme destruction was also computed. Experimental studies indicated that an increase in viscosity, flow rate or particle concentration decreased the mean and minimum residence time while an increase in particle concentration resulted in the opposite effect. In addition, it was found that an increase in viscosity widened the residence time distribution (RTD), while an increase in flow rate, particle size or particle concentration narrowed the RTD. Process lethality decreased from 8.0 to 2.3 mins when particle size increased from 1.0 to 1.5 cm; decreased from 5.9 to 4.0 mins when particle concentration increased from 30 to 50{\%}; and decreased from 6.5 to 3.0 mins when the heat transfer coefficient decreased from 300 to 200 W/m2-K.",
author = "Sandeep, {K. P.} and Zuritz, {C. A.} and Virendra Puri",
year = "1999",
month = "1",
day = "1",
doi = "10.1205/096030899532204",
language = "English (US)",
volume = "77",
pages = "11--17",
journal = "Food and Bioproducts Processing",
issn = "0960-3085",
publisher = "Institution of Chemical Engineers",
number = "1",

}

Determination of lethality during aseptic processing of particulate foods. / Sandeep, K. P.; Zuritz, C. A.; Puri, Virendra.

In: Food and Bioproducts Processing: Transactions of the Institution of of Chemical Engineers, Part C, Vol. 77, No. 1, 01.01.1999, p. 11-17.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Determination of lethality during aseptic processing of particulate foods

AU - Sandeep, K. P.

AU - Zuritz, C. A.

AU - Puri, Virendra

PY - 1999/1/1

Y1 - 1999/1/1

N2 - Experimental and modelling studies were conducted to ascertain the effect of viscosity, flow rate, particle size, particle concentration on the residence time distribution of particles during non-Newtonian flow in a holding tube. Another program was written to determine the temperature distribution within particles during flow in the heat exchanger, holding tube, and cooling section of an aseptic processing system. Based on this, the lethality of different processes was determined depending on the target microorganism. The extent of nutrient retention and enzyme destruction was also computed. Experimental studies indicated that an increase in viscosity, flow rate or particle concentration decreased the mean and minimum residence time while an increase in particle concentration resulted in the opposite effect. In addition, it was found that an increase in viscosity widened the residence time distribution (RTD), while an increase in flow rate, particle size or particle concentration narrowed the RTD. Process lethality decreased from 8.0 to 2.3 mins when particle size increased from 1.0 to 1.5 cm; decreased from 5.9 to 4.0 mins when particle concentration increased from 30 to 50%; and decreased from 6.5 to 3.0 mins when the heat transfer coefficient decreased from 300 to 200 W/m2-K.

AB - Experimental and modelling studies were conducted to ascertain the effect of viscosity, flow rate, particle size, particle concentration on the residence time distribution of particles during non-Newtonian flow in a holding tube. Another program was written to determine the temperature distribution within particles during flow in the heat exchanger, holding tube, and cooling section of an aseptic processing system. Based on this, the lethality of different processes was determined depending on the target microorganism. The extent of nutrient retention and enzyme destruction was also computed. Experimental studies indicated that an increase in viscosity, flow rate or particle concentration decreased the mean and minimum residence time while an increase in particle concentration resulted in the opposite effect. In addition, it was found that an increase in viscosity widened the residence time distribution (RTD), while an increase in flow rate, particle size or particle concentration narrowed the RTD. Process lethality decreased from 8.0 to 2.3 mins when particle size increased from 1.0 to 1.5 cm; decreased from 5.9 to 4.0 mins when particle concentration increased from 30 to 50%; and decreased from 6.5 to 3.0 mins when the heat transfer coefficient decreased from 300 to 200 W/m2-K.

UR - http://www.scopus.com/inward/record.url?scp=0042230450&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0042230450&partnerID=8YFLogxK

U2 - 10.1205/096030899532204

DO - 10.1205/096030899532204

M3 - Article

AN - SCOPUS:0042230450

VL - 77

SP - 11

EP - 17

JO - Food and Bioproducts Processing

JF - Food and Bioproducts Processing

SN - 0960-3085

IS - 1

ER -