| Author | Tabassum, Mohammad Afzal |
| Call Number | AIT Thesis no. AE-87-25 |
| Subject(s) | Rice--Pakistan--Drying
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. AE-87-25 |
| Abstract | A laboratory type Satake test dryer model TDR was used for
drying of Basmati-370 paddy variety. The temperature of the
drying air was controlled by regulating the fuel to the burner.
The air flow rate was controlled by varying t h e suction of the
blower through a c hut e specifically fabricated and attached to
the dryer.
A series of tests were performed to investigate the effect
of air temperature, relative humidity, initial moisture content
and the air flow rate on the moisture removal rates. The air flow
rate showed very little effect on the drying rate. However, the
initial moisture content of the paddy and t h e drying air
temperature appeared to influence the drying rate significantly.
Th e modified logarithmic mod el produced excellent fits with
individual experimental drying tests with the coefficient of
determination of 0 . 98 or better in all cases.
An attempt was ma d e to relate the drying equation parameters
with the experimental variables such as initial moisture content,
drying air temperature, relative humidity and the air flow rate
using t h e stepwise multiple regression analysis. However, all
possible combinations of independent variables showed no
meaningful relationship in view of the extreme l y low values of
correlation coefficients. Therefore, it was not possible to
generalize the drying behaviour of paddy perhaps due to the
discrepancies in the experimental data.
The head rice obtained at 40 and
was considerably higher than sun
paddy samples dried from 2 0 percent
was found higher than t hose at 23 or
45 °c drying air
drying. The head
initial moisture
26 percent wet
temperature
yield of
content
basis.
In Pakistan, the use of mechanical dryers for on-farm paddy
drying is al most non-existent. Only thirty percent rice mills have been using mechanical dryers along with traditional sun
drying practices. |
| Year | 1987 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. AE-87-25 |
| Type | Thesis |
| School | School of Environment, Resources, and Development |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Jindal, Vinod Kumar; |
| Examination Committee(s) | Illangantileke, Sarath G. ;Athapol Noomhorm; |
| Scholarship Donor(s) | The Federal Republic of Germany (DAAD) ; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1987 |