Abstract

SEGUI-AMORTEGUI, Luis; ALFRANCA-BURRIEL, Oscar  and  MOELLER-CHAVEZ, Gabriela. Methodology for the Technical-Economic Analysis of Wastewater Regeneration and Reutilization Systems. Tecnol. cienc. agua [online]. 2014, vol.5, n.2, pp.55-70. ISSN 2007-2422.

Establishing the cost and price of reclaimed water is important to the design and exploitation of a Wastewater Reclamation and Reuse System (WRRS). While it is possible to obtain a detailed rough estimate of the cost of a WRRS, the price of reclaimed water is a different matter. This is mainly because no reclaimed water market exists to enable determining the price and, therefore, the only reference value is the price of the water from conventional sources. Nevertheless, this price does not reflect all the impacts involved in the reclamation and reuse of wastewater. The economic-financial analysis of WRRS has traditionally focused on the system's private costs and income. The methodology presented herein, in addition to considering these private impacts, incorporates factors external to the project through the analysis of both positive and negative external impacts. The methodology is suitable to the particularities of the WRRS, serving as a "customized" tool for decision-makers to determine whether or not the implementation of this type of system is useful. This methodology evaluates the WRRS from a multi- and interdisciplinary perspective. The main objective is to optimize the benefits of the project. The methodology herein has been compared and applied to diverse case studies by the authors as well as other researchers.

Keywords : Project analysis; water reuse; water economics.

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