Cost function for reverse osmosis:

The original cost function (A1) is as follows:

The cost function for reverse osmosis is based on the flow of the plant, and the nitrogen and sediment concentrations present at the entrance of the plant. This article presents how to obtain the final equation.

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 following is the obtained function:


Bibliography

Preliminary Cost Estimation Models for Construction, Operation, and Maintenance of Water Treatment Plants. 2013. 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. | https://ascelibrary.org/doi/abs/10.1061/%28ASCE%29IS.1943-555X.0000155

Referencies

Tratamiento de agua potable | https://drinking-water.extension.org/drinking-water-treatment-anion-exchange-units/