There is abundant fish waste in local fish market, either in coastal towns or in metropolitant cities in Iran. The moisture
content of these fish wastes is about 65%. Biodiesel production, manure composting, biogas production and burning of fish wastes to produce energy are different ways to utilize the fish waste in the world. This amount was 299,128 t (PersianGulf), 32,533 t in Caspian Sea, the total rate in 2003 reached 441,836 t.