Abstract
We evaluated the effect on energy consumptions and greenhouse gas (GHG) emissions by introducing update measures in collaboration with a sewage treatment plant and a waste incineration plant serving 300,000 people. We set three cases; 1: no collaboration system; 2; integrated thickened sludge and food waste digestion system; 3: case 2 + integrated waste and dried sludge incineration system. Estimation was carried out considering effects on the incineration process of an increase in dewatered sludge, and effects on the energy balance of waste incineration facilities of changes in trash composition and heat consumption. Relative to case 1, The estimated annual amounts of GHG emissions were reduced by 12.1 % under case 2, and by 39.9 % under case 3. The increased amounts of energy consumption in January relative to that in August for case 1, 2, and 3 were 54.8 GJ/day, 64.8 GJ/day and 25.9 GJ/day respectively. In conclusion, the performance of case 3 was highest.
