| Author | Santha, Calista Rohini |
| Call Number | AIT Thesis no.AE-85-30 |
| Subject(s) | Fish ponds
|
| 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 |
| Abstract | Moisture adsorption by paddy results in the formation of fissures
leading to a reduction in its head rice yield. In this study, the
moisture adsorption characteristics of paddy as affected by initial
moisture content (IMC), air temperature (T) a nd relative humidity (RH),
and the exposure duration(t) Here determined in order to quantify the
reduction in head rice yields during rewetting.
Experimental test conditions Here in the following ranges :
Paddy initial moisture content, B-15 % Net basis ; air temperature,
20-40°C; air relative humidity, 60-90%; and exposure time, 0 . 5-24 h . A
controlled temperature and relative humidity cabinet Has used for
rewetting paddy samples Neighing 130 g and placed in Hire-mesh trays.
Paddy samples having moisture content more than 13 % Kb after rewetting
Here dried to 13 % Kb prior to milling. Samples having moisture content
less than 13 % Kb were milled as such.
Stepwise multiple regression analysis showed that moisture
adsorption in paddy Has affected by IMC, RH, t, T in decreasing order of
significance. TKO different approaches Here made to represent the
experimental moisture adsorption data. Both models Here found to be
adequate to represent the moisture adsorption characteristics of paddy.
Rewetting of paddy samples resulted in a reduction in head rice
yields , Which was expressed as a ratio of percentage head rice yield of
treated sample to that of control sample. Most of t he reduction in
head rice yields occurred during the initial few hours of exposure. A
relationship between the head yield ratio and t he initial moisture
contents of paddy Ha s developed by taking into account the relative
contributions of RH, t and T. Such a relationship could be used to
quantify the reduction in head rice yields due to moisture adsorption. |
| Year | 1986 |
| 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) | Illangantileke, Sarath G. ;Gupta, Chandra P.
|
| Scholarship Donor(s) | Government of Japan. |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1986 |