| Author | Khan, Irfan Safdar |
| Call Number | AIT Thesis no. AE-89-25 |
| Subject(s) | Farm produce--Packaging
|
| Note | A thesis submitted in partial fulfilment of the requirements
for the degree of Master of Science, School of Environment, Resources and Development
|
| Publisher | Asian Institute of Technology |
| Abstract | A less exploited concept of using double polymeric films
for the modified atmosphere packaging of freshly harvested
produce was tried in conjunction with good harvesting
practices (GHP) ,precooling, ripening retardants , anti- fungal agents
and us e of ethylene absorbents. Banana was packed in consumer
packs using polystyrene tray as a base plate. A fabricated
permeability cell base d on the concentration increase principle
was used to determine the film permeabilities. Respiration rates
of the fruit were determined. A model for the double film layered
packages was used to predict the package surf ace area and the
best possible combination of films. The film combinations used
were PVC- MYLAR(PVMY),PVC- LLDPE (PVLE ), PVC - SARAN (PVSN )and single
layered MYLAR (MY ) and LLDPE (LE)packages.
The results indicated a better storage life for the product
packed in double film packages. At 13°C, the PVMY packaging
system had ashelf life of 52 days . At 20°C, PVSN had a storage
life of 44 days and at a storage temperature of 30°c , · PVLE had
the maximum storage life of 36 days. Condensation was not
observed in the PVLE packaging system at 30°C . At all other
storage temperatures however some condensate was observed to be
trapped in between the two layers. The relationship between the
occurrence of the equilibrium concentration inside the pack and
the shelf life extension was observed. The packs which attained
early equilibrium had a longer shelf life . A better control of
the concentration of gases was observed in the case of double
film packages. The quality of the product in double film packages
as observed by weight loss, color changes, pulp-peel ratio and
firmness was observed . to be satisfactory. |
| Year | 1989 |
| Type | Special Study Project Report (SSPR) |
| School | School of Environment, Resources, and Development |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Illangantileke, Sarath G. ; |
| Examination Committee(s) | Athapol Noornhorm ;Salokhe, Vilas M. ; |
| Scholarship Donor(s) | Government of France ; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1989 |