an industrial drier at a reltive humidity close to 60%, at a temperature of 19–20 °C and an air velocity of 2–2.6 m/s). Rozainee and Ng (2010) investigated the effects of microwave power and hot air temperature on drying time, dehydration behaviour, energy consumption and colour of dried catfish at microwave hot air dryer, reporting that microwave assisted dehydration saving energy about 80–90% compared to convective hot air drying. Wu and Mao (2008) studied the influences of hot air drying and microwave drying on nutritional and odorous properties of grass carp fillets. They found that the microwave drying as an efficient drying process for fish fillets.