Estimation of the Cost of Building a Water Treatment Plant and Related Facilities for Kaw City, Oklahoma

Abstract

The city of Kaw City had water problem since the 1990's because of the collapse of the wells and the poor taste of the groundwater. The Aeralator and NF treatment systems would be considered with each has two different sizes with an output of 60 gpm and 150 gpm of water treated assumed to supply Kaw City only and both Kaw City and Shidler respectively. The cost of investment capital was estimated by the sum and product of units cost and quantity of materials and equipment. The operating cost was estimated by summing the chemical, utilities, labor replacement and administration and operations. An amortization factor was used to determine the annual fixed capital cost with the design life of 50 years and rate of 5%. The cost per unit of thousand was determined as the total cost divided by the total design flow rate multiplied by 1000.The cost of amortized capital Aeralator and NF treatment plant of capacity of 60 gpm were estimated to be $14,945/yr and $18,841/yr. The total operating cost of NF treatment plant was $40,384/yr and Aeralator treatment plant was estimated to be $20,908/yr. For treatment plant of capacity of 150 gpm, the annual capital fixed cost of Aeralator system was estimated to be $17,728/yr while NF was estimated to be $28,974/yr water of treated water. Moreover, the total operating cost of Aeralator and NF systems were estimated to be $31,385/yr and $56,846/yr respectively. The annual economic costs of the two treatment system plants were estimated to be $0.62/1000 gallon of Aeralator treatment plant and $1.09/1000 gallon of NF treatment plant. The estimated costs of the NF were more costly than Aeralator system. The investment cost of the layout of the entire city was estimated to be $15.34/ft of the investment cost. The annual fixed cost of the layout of $20,648/yr and CRF of $0.05. Due to economy of scale of treating and supply of water, it is economically more cost effective to supply water to both Kaw City and Shidler and serve cost.