Effects of pineapple waste storage conditions on the chemical composition of bran | |
| Author | Pal, Kushal |
| Call Number | AIT Thesis no.AE-80-02 |
| Subject(s) | Pineapple Factory and trade waste |
| Note | A thesis submitted in partial fulfilment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | This study was conducted in two parts. The first part consisted of collecting the pineapple production and waste generation data along with their seasonal variations. A questionnaire was prepared and mailed to the various pineapple canning companies in Thailand. In view of the extremely poor response from the canneries, it was not possible to come up with any concrete information. These data were later compiled based on the published information and presented. In the second part, the influence of pineapple waste storage conditions on the chemical composition of bran was studied. The solid waste obtained from a pineapple cannery was reduced in size by chopping and mixed thoroughly. The samples were stored at three temperatures of 20, 30 and 40 °c under open and closed conditions in the polythene bags. The physical and chemical changes in the stored waste were studied at the end of 1, 3, 5 and 8 days periods. No chemical or biological treatment of any kind was given to the stored samples. At the end of a given storage period, the juice was extracted by a manually operated hydraulic press at 35 Kg per sq. cm, pressure. The residues were dried in an oven at 70 °c over night and ground later in a laboratory hammer mill using 100 mesh grate. The powdered samples were placed in air tight glass bottles for subsequent testing. Methods (proximate analysis) described by the Association of Official Agricultural Chemists (A.O.A.C.) were followed to analyse the bran samples, The juice was analysed for ph, acidity, sugar, percent juice and visual assessments. The proximate analysis of the bran consisted of moisture content, dry matter, ash, calcium, phosphorus, crude protein (N x 6.25), ether extract, crude fibre and sugar determinations. In addition, nitrogen free extract, carbohydrates, gross energy and total digestible nutrients values were also calculated based on the experimental composition. Ether extract, crude fibre and sugar contents were influenced most by the storage temperature and in general decreased with an increase in the temperature at all storage times. However, the values of phosphorus were slightly higher at increased temperatures after 3rd day in both open and closed conditions. In general, the values of most of the parameters of proximate analysis of bran increased with time, except nitrogen free extract, sugar and dry matter which showed a decrease with time in both conditions. The effects of open and closed conditions were distinct in case of ph, acidity and sugar in juice and also for the crude protein, crude. fibre and total digestible nutrients of the bran samples with time at all temperatures. The juice extracted from the samples on and after 5 days was of very little value due to its very low sugar content and high odour. On the bases of total digestible nutrients (TDN) values, the samples at the end of five days at 20 °c under both conditions showed maximum values of TDN which provided a relative measure of the metabolisable energy content of the feeds. |
| Year | 1980 |
| Type | Thesis |
| 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) | Jindal, Vinod Kumar |
| Examination Committee(s) | Eppendorfer, W.H. |
| Scholarship Donor(s) | Government of Netherlands |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1980 |