| Author | Yuporn Chanyongvorakul |
| Call Number | AIT Thesis no.AE-88-24 |
| Subject(s) | Peanuts
|
| 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 study of quality changes in dry roasting of peanuts by
conduction and convection heating was undertaken.
A batch type rotary conduction heating unit and a
laboratory air oven were used for roasting peanuts using
processing temperatures ranging from 180 to 210 °C. A
modified Kramer shear cell a nd a Kett whiteness meter were
used for the measurement of peak shear force and whiteness
ratio, respectively. Sensory evaluation of roasted peanuts
included the attributes like color, crispness, taste and
overall acceptability. All quality parameters depended upon
the degree of roasting in terms of exposure duration. The
peak shear force and whiteness depended only upon the mean
bulk temperature determined from the time-temperature
histories for different process temperatures. The
interrelationships of objective and sensory evaluations led
to the determination of optimum conditions for roasting and
the estimation of kinetic parameters for quality changes .
The values of peak shear force and whiteness ratio
corresponding to optimum roasting quality based o n sensory
evaluation were 78 kg and 0 .68; 69 kg and 0.64 for air oven
and conduction heating , respectively. The kinetic parameter
(Zs- value ) was found to be 185 °C for air oven process and
110 °C for conduction heating for estimating the suitable
exposure times. Due to the uniformity in appearance, roasted
peanuts from conduction heating were more acceptable by the
consumers than from roasting in the air oven . |
| Year | 1988 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Jindal, Vinod Kumar |
| Examination Committee(s) | Athapol Noomhorm ;Illangantileke, Sarath G. |
| Scholarship Donor(s) | The Government of Australia |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1988 |