Technical and economic analysis of potential steam supply from waste treatment plants to industries in Aichi Prefecture, Japan

Environmental and Economic Evaluation of Mechanical Biological Treatment System for Municipal Waste Considering the Political Framework in Ichihara City

“…The evaluation presented in this study indicated that the observed results were better when the MBT system was introduced. Maki et al has evaluated the steam supply potential from the waste treatment field to the industrial world, and the results showed the potential of Aichi Prefecture, Japan, in 2021, but this study was an evaluation of Ichihara City, Chiba Prefecture, which was different from Aichi Prefecture, and was considered for the construction of an industrial use model of waste energy in Chiba prefecture [6].…”

“…where The amount of steam generated from the incinerator of the waste incineration plant was calculated from Equation (6). The boiler efficiency was assumed to be 85%.…”

“…The CO 2 emissions were superior to the case of using heat, but the annual cost may be higher, so establishing a waste incineration plant assuming that heat will be used after introducing the MBT system at a point more than 5.59 km away from the heat supply destination, was difficult. Similarly, Maki et al stated that the cost-effectiveness deteriorates when the distance between the waste incineration plant and the industrial facility increases, and the profitability decreases when the distance is 1 km or more while evaluating Aichi Prefecture in 2021 [6]. Since the piping distance that maintained profitability varied depending on the unit price of heat sales, the appropriate piping distance value varied regionally.…”

“…The environmental and economic efficiency of a collaboration between waste incineration plants, sewage treatment plants, and industrial facilities is under evaluation [3][4][5][6][7]. A study that evaluated the environmental friendliness and business profitability of a waste incineration plant and a sewage treatment plant, located adjacent to each other and cooperating, showed that incinerating dry sludge at the waste incineration plant and reusing the heat from the process to heat the water supply for the fire extinguishing tank resulted in a 51% Greenhouse Gas (GHG) emission reduction compared to the normal method [5].…”

“…Furthermore, a study that evaluated the feasibility of supplying steam from a sewage treatment plant to an industry in Aichi Prefecture, Japan, showed that the strategy was costeffective within a 1 km distance, but profitability decreased with increasing distance [6]. These assessments were based on the concept of the life cycle assessment (LCA).…”