Resumo

PEREZ SANCHEZ, Amaury  e  SANCHEZ GONZALEZ, Marisabel. Techno-economic evaluation of a chromic wastewater treatment plant proposal. Rev. ion [online]. 2022, vol.35, n.2, pp.33-48.  Epub 25-Abr-2023. ISSN 0120-100X.  https://doi.org/10.18273/revion.v35n2-2022003.

Wastewater treatment plants are systems that, if properly operated, can help the health of industry and the environment. In the present work, the techno-economic evaluation of a proposed chromic wastewater treatment plant with a processing capacity of 9 t of wastewater per batch was carried out, in order to determine its main profitability parameters, using SuperPro Designer® simulator v. 10. Around 6,959.90 L/ batch of treated water are generated, while a total capital investment of USD $ 3,549 million and a direct fixed capital of USD $ 3,222 million are required. The item that most influences the annual operating costs is the facility-dependent costs (USD $ 345,000/year), while the reagent that most influences the material consumption annual costs is ferric chloride (USD $ 56,805/year). It was obtained a unit processing cost of USD $ 0.22/kg, an annual net profit of USD $ 486,000 and a return on investment of 22.16%. The values obtained for the indicators Net Present Value (USD $ 3,361,000), Internal Rate of Return (29.61%) and Payback Time (4.51 years) allow establishing that the proposal is profitable under the current economic conditions of Cuba.

Palavras-chave : Chromium; Economic evaluation; Process simulation; Wastewater treatment.

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