Parameter estimation

Transfer

Electric power of the elevator

· Conditions of the elevator: 20 story apartment, 40 households, height between floors: 2.8 m, the speed of the elevator 90 m/min, the rated electric power of the elevator 8.3 kW [27] .

· Frequency to put out food waste per household for collection: 10 times per month (20 times for round trip).

· The amount to put out food waste per month: 0.63 ton(= 0.0045 ton/household/month × 3.5 p/household × 40 households).

· Running distance per month of the elevator: 22400 m (= 40 households × 20 times × 2.8 m × 20 floors ÷ 2).

· Used electricity power per month of the elevator: 34.4 kWh(= 8.3 kW × 22400 m ÷ 90 m/min ÷ 60min/hr).

· Used electricity energy per ton of food waste: 54.6 kWh(= 34. 4 kWh ÷ 0.63 ton).

· Electric charges per ton of food waste: 3 USD (= 34.4 kWh × 0.0551 USD/kWh ÷ 0.63 ton).

· Electric power for elevator is excluded when FWDMs are used.

Diesel for collection and transport

· Vehicle conditions: load capacity: 5 tons, transportation distance per day: 37 km, the frequency of collection per day: 3 times, collection amount per day: 15 tons-food waste, fuel efficiency: 3.2 km/L-Diesel.

· Consumption of diesel for collection and transport per ton of food waste: 0.8 L/ton(= 37 km ÷ 3.2 km/L ÷ 15 ton).

· Cost for collection and transport per ton of food waste: 55.6 USD/ton [28] .

· The consumption and the cost of diesel for dried food waste were estimated as 18% of total food waste for FWDMs [29] .

Electric power of an AVWC system

· Conditions of the facilities: The construction cost: 17 million USD, the repair and maintenance cost: 6.8 million USD, the persisting period: 20 years, the amount of waste from an AVWC system for 20 years: 41449 tons.

· Used electricity energy per ton of food waste: 324.3 kWh(= 200 kW/hr × 3360 hr ÷ 2072.5 tons).

· Construction cost per ton of food waste: 574 USD (= 23.8 million USD ÷ 41449 ton/20 yrs).

· Operating cost per ton of food waste: 186 USD/ton [30] .

Diesel for transport of the compositing facilities

· Vehicle conditions: load capacity: 5 tons, total transportation distance: 80 km, frequency of transport: 2 times, transportation amount: 10 tons, fuel efficiency: 4.8 km/L-Diesel, one driver per vehicle.

· Consumption of diesel per day of a vehicle: 3.3 L (= 160 km ÷ 4.8 km/L ÷ 10 ton).

· Energy consumption per ton of food waste: 34.7 kWh (= 3.3 L × 9050 kcal/L ÷ 860 kWh/kcal).

· Transport cost per ton of food waste: 30 USD [31] .

The consumption and the cost of diesel for dried food waste were estimated as 18% of total food wastefor FWDMs [29] .