Browsing by Author "Chandranayake, M.R.S."

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    Production of Edible Copra and the Evaluation of Shelf Life
    (Uva Wellassa University of Sri Lanka, 2013) Chandranayake, M.R.S.
    Short the shelf life, high level of residual sulfur dioxide and high production cost are the major problem in Sri Lankan value added (VA) copra. High valve Sri Lankan residual sulfur limit is 50 ppm but in most situations it goes up to 100 ppm. So it is necessary to produce high quality copra that having low residual sulfur levels. Another problem in VA is the short shelf life and the changes color within six month period. Hence it is necessary to understand the factors limiting the shelf life. Therefore experiments were conducted to estimate total plate count (TPC), yeast and mould (Y and M) and residual sulfur dioxide levels during storage period, untreated copra, ozone treated copra, glacial acetic acid (GAA) and in the copra produced by using indirectly heated copra dryer. Newly produced 2013 VA copra shows 101.38 ppm residual sulfur dioxide level and 2011 VA 88.4 ppm. Controller and GAA copra gives below 10 ppm residual sulfur dioxide. There was a significant increase in TPC during five month storage period. The Y and M counts not increase significantly in copra and the residual sulfur dioxide levels found to be reduced. Hence TPC can be a factor to limit shelf life of VA copra. GAA copra gives unsuitable brown color. Indirectly heated copra dryer gives economical MS2 copra, 3.1 MT copra in every 3 days and weekly 6.2 MT of copra, copra under any climatic conditions and an additional income from coconut shells but the colour obtained is not suitable for VA copra. Key Words: value added copra, shelf life, residual sulfur dioxide, total plate count, yeast and mould
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    Production of Edible Copra and the Evaluation of Shelf Life
    (Uva Wellassa University of Sri Lanka, 2013) Chandranayake, M.R.S.; Chandrasena, G.; Silva, S.
    Short the shelf life and high level of residual sulfur level are the major problem in Sri Lankan Value Added (VA) copra.The acceptable limit of residual sulfur dioxide level in Sri Lanka is 50 ppm (SLS 98:1988). But most of copra manufactured in Sri Lanka contains more t han 100 ppm residual sulfur dioxide levels. Residual sulfur levels allowed in the copra in European Union (EU) is 10 ppm. Therefore it is necessary to reduce residual sulfur level in copra. Another problem in VA copra is short shelf life and changes in color within six month period. Therefore it is necessary to identify the factors limiting shelf life. Production cost of VA copra is high compared with its value in the market. Indirectly heated copra dryers have the ability to produce economical and high quality copra. Therefore this research was done to find out of TPC (total plate count), yeast and mould and during production process and five month storage period, to find out the residual sulfur levels during kiln drying and five storage period, to find out the variation of moisture and temperature of copra during kiln drying and to find out most effective value added treatment like glacial acetic acid and ozone treatment. Methodology The study was carried out at the AdamjeeLukmanjee and Sons (Pvt) Ltd, Colombo 14, Sri Lanka.Residual sulfur dioxide levels were measured by following Standard No: SLS 98 test method. And test was standardized by using Sodium sulfite Na2SO3. Total plate count (TPC) and yeast and mould (Y and M) count were taken by adopting “oxoid” microbiology test methods and SLS 516 part 1 and 2. Study was conducted for residual sulfur dioxide determination, Sodium Meta bi sulfite (SMS) three applications, Glacial acetic acid application (GAA) and Ozone treated copra. For five month shelf life evaluation and for ozone treatment 2013 manufactured vacuum packed VA copra were used. Complete randomized design (CRD) was used. Two trials were conducted in indirectly heated copra dryer which has been installed in Pannala permisis belongs to Adamjee Lukmanjee and Sons (Pvt) Ltd. Performance was evaluated by using operational cost calculation, TPC, Y and M and residual sulfur dioxide calculation.Data was analyzed by MINITAB 16 statistical package.