A restaurant generates 500 kg food wastes per day, which was considered to be treated by an incinerator. The moisture content of the food waste is 70% and the chemical composition of its dry matter contains 48% carbon, 6.4% hydrogen, 37.6% oxygen, 2.6% nitrogen, 0.4% sulfur and 5% ash. If the organic part of the food waste can be completely burned, calculate the total energy production (MJ/day) after combustion.