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Cost function for filter back-washing water-air

Cost Functions

The original cost function (A1) for air-water washing is as follows:

Función de costos de lavado agua- aire (1)

This has as a variable (x) the total area of the facility in ft2 (square feet). To convert it to the variables available to the system (flow rate), the following relationship was used to express that area as a function of flow rate:

Función de costos de lavado agua- aire (2)

Where C represents the hydraulic load, with a 350 m/d value of in terms of flow:

Función de costos de lavado agua- aire (3)

Additional modifications to this function correspond to the correction of costs per year, with the CCI ENR index of 9547 of the year 2013, to obtain A3. Then part B2 related to the elasticity index is added. This is done in the same way as explained in the article Cost functions — General.

According to the above, the following is the function obtained:

Función de costos de lavado agua- aire (4)

Bibliography

  1. Preliminary Cost Estimation Models for Construction, Operation, and Maintenance of Water Treatment Plants Jwala R. Sharma, Ph.D., M.ASCE; Mohammad Najafi, Ph.D., P.E., F.ASCE; and Syed R. Qasim, Ph.D., P.E., M.ASCE 2013

    Reliable cost estimation of construction, operation, and maintenance (O&M) of water treatment plants is essential for project planning and design. The authors have developed construction and O&M cost models for different unit operations and processes involved in water treatment plants. This paper presents the use of a single cost index to further update construction and O&M costs.

References

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