A Generalized Fuzzy Integer Programming Approach for Environmental Management under Uncertainty

Table 1

Waste generation levels and cost coefficients.

	Time period
	= 1	= 2	= 3
Waste generation (t/day)
City 1	(225, 25, 25)	(250, 25, 25)	(275, 25, 25)
City 2	(375, 25, 25)	(400, 25, 25)	(425, 25, 25)
City 3	(300, 25, 25)	(325, 25, 25)	(350, 25, 25)
Cost of transportation to landfill ($/t)
City 1	(14.1, 2, 2)	(15.5, 2.2, 2.2)	(17, 2.4, 2.5)
City 2	(12, 1.5, 2)	(13, 1.9, 1.9)	(15, 2.2, 1.9)
City 3	(15.1, 2.4, 1.9)	(16.5, 2.5, 2.2)	(18, 2.6, 2.6)
Cost of transportation to landfill ($/t)
Waste-to-energy facility	(10, 1, 1)	(12, 1, 1)	(14, 1, 1)
Cost of transportation to waste-to-energy facility ($/t)
City 1	(11.2, 1.6, 1.6)	(12.3, 1.5, 1.5)	(13.5, 1.8, 2)
City 2	(11.8, 1.7, 1.6)	(12.9, 1.8, 1.8)	(14.2, 2, 2)
City 3	(10.2, 1.4, 1.5)	(11.3, 1.4, 1.5)	(12.6, 1.7, 1.7)
Operation costs ($/t)
Landfill	(50, 8, 7)	(58, 10, 10)	(68, 15, 15)
Waste-to-energy facility	(60, 10, 10)	(68, 10, 10)	(75, 10, 10)