Better Waste Solutions Producing market-competitive products from waste BWS Better Waste Solutions Global Ltd. Innovative Technology Waste-to-Green Product Technologies: Viable Options for Fuel Cost Reduction and Sustainable Waste Management 2 Un-utilized Resources Municipal Solid Waste Waste Plastic Hospital Waste Sewage Sludge 3 Oil and Fertilizer Prices Change Fig.2. Energy and fertilizer prices (Source: Mueller et al., 2011) 4 Condition for profitable Waste-to-GreenProduct Business Income from Waste Treatment Increase ・Deficiency of landfill area ・Environmental concern on land-filling + Income from selling product > Increase ・Fuel price increase ・Fertilizer price increase + Labor cost Decrease ・Automation ・Cheap labor Utility cost + Decrease ・Self energy generation Capital cost Decrease ・Technology standardization ・Technology licensing Effect of New Te c h n o l o g i e s New Market 5 Resource Recycling system ① Waste-to-Coal Technology MSW (Municipal Solid Waste), Hospital Waste ② Waste-to-Fertilizer Technology Sewage Sludge, Animal Manure, Food Waste ③ Waste-to-Oil Technology Waste Plastics, E-Waste (Mobile Phone, PC) 6 ① Waste-to-Coal Technology Hydrothermal Treatment of MSW MSW input Fuel Dry Product Boiler Steam (220℃,2.5MPa) Motor Reactor Airblow drying Product Clean Water Water Treatment (85%) Cement Kiln Water Condenser (15%) 7 Application of Waste-to-Coal In Cement Production Treated MSW Material input Coal Mixer Bunker Pulverizer MSW = Municipal Solid Waste product out 8 Commercial Plants 9 Economical Feasibility of Waste to Coal • • • • • • • • • • • • Treatment capacity of MSW : 100tons/day Investment for full treatment plant with 2 reactors – 3 M US$. Moisture content of MSW : 65 % Production per annum on dry basis –12,600 tons/year (100tons/day X 0.35 X 360 days) Boiler fuel: 15% of RDF will be utilized as a boiler fuel – 1,890 tons/year Annual operation period: 360days Daily operation: 24 hours/day Maintenance cost/year (2% of the capital cost) – 0.06 M US$/year VC and FC – (labor, electricity… ) – 0.06 M US$/year Capital cost (7 years depreciation) – 0.43 M US$/year Total expenditure – 0.55 M US$/year Fuel production cost – 51 US$/ton (0.55 M US$/year/ ((12,600-1,890))tons/year) 10 ② Waste-to-Fertilizer Technology Sewage Sludge Treatment Hydrothermal treatment Water content 80% Heavy metal Fast natural drying (24 hours) Water content 10~20% Water content 85% Mechanical dehydration Water content 55% Nutrient (N, P, K) Separated water 11 Economical Feasibility of Waste-to-Fertilizer • • • • • • • • • • • • • Treatment capacity of Sewage sludge : 30tons/day Investment for full treatment plant with 2 reactors – 1 M US$ Moisture content of sludge : 80 % Solid fuel production per annum on dry basis –2,160 tons/year (30tons/day X 0.2 X 360 days) Boiler fuel: 100% of RDF will be utilized as a boiler fuel – 2,160tons/year Liquid fertilizer production per annum –10,800tons/year (30tons/day X 360days) Annual operation period: 360days Daily operation: 24 hours/day Maintenance cost/year (2% of the capital cost) – 0.02 M US$/year VC and FC – (labor, electricity… ) – 0.02 M US$/year Capital cost (7 years depreciation) – 0.14 M US$/year Total expenditure – 0.18 M US$/year Production cost of the liquid fertilizer – 17 US$/ton (0.18 M US$/year/ (10,800tons/year)) 12 ③ Waste-to-Oil Technology Flow Chart Plastic to Oil Waste plastics Agitator Reforming catalyst Stack Cooler 煙 突 Screw hopper Heated extruder Circulation pump No.2 Condenser Pyrolyzer No.1 Condensor Burner Oil/water separation Oil/water separation Oil recov ery Residue recovery Off-gas burner Oil recover Oil pump Oil pump Controller Oil tank Oil tank 13 Commercial Plants Recycled oil Carbonized solid Meta l Waste Mobile Phone (2 m3) (Japan) Waste Plastics (5 m3) (Japan) 14 Economical Feasibility of Waste to Oil • • • • • • • • • • Treatment capacity of waste plastics : 10tons/day Investment for full treatment plant – 1.2 M US$ Net oil production per annum –1,800,000 L (5,000 L/day X 360 days) Annual operation period: 360days Daily operation: 24 hours/day Maintenance cost/year (2% of the capital cost) – 0.024 M US$ Labor cost/year – 0.02 M US$ Capital cost (7 years depreciation) – 0.17 M US$ Total expenditure – 0.214 M US$/year Oil production cost – 12 US¢/L (0.214 M US$/year/ (1,800,000 L/year)) 15