| Material Information
||Controlled atmosphere storage of produce
||2 leaves : ill. ; 28 cm.
||Stephens, James M.
University of Florida -- Agricultural Extension Service
||Florida Agricultural Extension Service
||Place of Publication:
||Farm produce -- Storage -- Florida ( lcsh )
||government publication (state, provincial, terriorial, dependent) ( marcgt )
non-fiction ( marcgt )
||"April 12, 1967."
||Statement of Responsibility:
| Record Information
||University of Florida
||University of Florida
||All rights reserved by the source institution and holding location.
||oclc - 433147944
CONTROLLED ATMOSPHERE STORAGE OF PRODUCE *
J. M. Stephens HUME LIBRARY,
Assistant Vegetable Crops Specialist
Agricultural Extension Service
University of Florida JUL 11 1972
April 12, 1967 I.F.A.S. Univ. of Florida
Several techniques of modifying atmospheres are now in commercial
use. They include, along with one refrigeration system (No. 5), the
(1) Conventional "Controlled Atmosphere" (CA)
(2) Tectrol CA
(3) Oxytrol CA
(4) Arcagen CA
(5) Nitrogen Refrigeration (Polarstream)
All are somewhat similar, and have as their primary aim (with the
exception of No. 5) the reduction of the respiration rate of the produce
they are protecting. This reduction is accomplished with all systems by
lowering the oxygen level and slightly Increasing the carbon dioxide level
of the storage atmosphere. All are used in combination with proper
Here are brief illustrated outlines of the way the major systems
perform this job.
(1) Conventional CA
used mostly 02
Oxygen level is reduced as 02 is utilized by the apples; excess
CO2 produced is removed from the storage atmosphere by scrubbers.
* (Compiled from various publications)
(Also used in transit under Transfresh label)
-~ '* CO2 Storage Area This scrubber
Modified a may also be
ARCAT Atmosphere Installed
Generator f "
.-.-.,- Recirculating IScrubber CA.
The Arcat generator is a relatively costly investment, but has low
operating cost. It is a fixed Installation.
A sensing device controls the release of N to maintain a predetermined
level of oxygen.
(5) LIQUID NITROGEN REFRIGERATION (POLARSTREAM)
N N N N N
Con- Temperature sensing device
talner and automatic valve.
Cooling blanket of liquid nitrogen released over load; primary purpose
is maintaining cool temperatures; but like the oxytrol system, it provides
a low oxygen-high N atmosphere.
For more information, refer to Vegetarian No. 75, October 24, 1966.