The composition of apple pomaces varies according to the type
of processing applied for juice extraction especially how many
times the apples were pressed. According to the chemical compositional
analysis shown in Table 1, initial reducing sugar for apple pomace was determined as 6.25% corresponding to 16.16 g/L.
Furthermore its high amount of total solid content suggested that it
might contain cellulose, hemicellulose and lignin in its solid fraction.
In fact this was confirmed by the high amount of total dietary
fibre content. HPLC results showed that arabinose was the main
sugar in apple pomace [11]. The presence of fermentable sugars in
apple pomaces in significant amounts, together with proteins,
makes them potential candidates to be used for the production of
value added bioproducts, such as bioethanol.