Abstract
Mango peel and stone are the major process wastes of mango processing industry. In this study, an attempt was made to explore the economic potential and operational feasibility of outer hard fibrous pericarp of mango stone as a source of energy by adopting briquetting technology. Mango seed shell briquettes were prepared using hot and cold compression techniques to evaluate the influence of temperature (100 and 150°C), applied pressure (150 and 200 kg.cm-2) and binder level (sodium silicate: 15 and 20%). Properties of the briquettes such as density, durability, shatter indices and calorific value were determined. The briquettes produced by hot compression have the maximum and minimum densities of 1281 and 1184 kg.m-3, respectively. On the other hand, corresponding values in cold compression were 1127 and 1032 kg.m-3, respectively. Durability ranged from 88.04 to 94.31% in hot compression, while the range was 85.93 to 91.09% in cold compression. Among the two methods, maximum per cent (95.21%) weight was retained by the briquettes made by hot compression with high temperature and pressure combinations. The calorific value of mango stone shell was found to be 4468.67 kcal.kg-1. Minimum calorific value of 3546.23 kcal.kg-1 was noticed when briquettes were made with 20% binder level. High calorific value with good stability and durability of mango seed shell briquettes reflected its potential as a feasible energy source.
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