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Cost function for high rate settling tank and sludge blanket settling

Cost Functions

The original cost function (A1) for a high rate settling tank is as follows:

Función de costo para sedimentador de alta tasa y de manto d (1)

This has as variable (A) the total area of the conventional settler in ft2 (square feet). The following relationship was used to express that area as a function of flow:

Función de costo para sedimentador de alta tasa y de manto d (2)

Where C is the hydraulic head of the settler and a value of (30 m / d) is taken. The transformation is carried out as follows:

Función de costo para sedimentador de alta tasa y de manto d (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 Cost Functions Wiki — General .

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

Función de costo para sedimentador de alta tasa y de manto d (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

  • settlers https://sistemamid.com/panel/uploads/biblioteca/2017-01-27_09-43-1313…
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