Riesgos emergentes de contaminacion quimica y microbiológica en la reutilizacion de aguas residuales para riego agrícola: estudio integrado (ROUSSEAU) Ref. CTM2017-89767-C3-1-R
ENTIDAD FINANCIADORA: Ministerio de Economía, Industria y Competitividad
DURACIÓN, desde: 1Enero 2018 hasta: 31 Dic. 2020 SUBVENCIÓN: 381.150 (139.150 CSIC) Euros
INVESTIGADOR PRINCIPAL: Silvia Díaz Cruz (IP y Coordinadora del proyecto-3 socios).
To cope with rising water demand, the reuse of reclaimed wastewater for agricultural irrigation is increasing worldwide. This demand is not only directed to arid or semi-arid zones. Taking into account the ubiquity and the large number of biological and chemical contaminants transported in the reclaimed waters, it is of utmost importance to evaluate their uptake by the crops and the foods produced. In recent years, more detailed studies of pollutants of chemical and biological origin have shown that they can also be absorbed by plants and accumulate in their edible tissues.
The overall objective of this project is to carry out an integrated evaluation of the benefits and drawbacks derived from the use of regenerated wastewater for agricultural irrigation. The evaluation will be carried out in terms of propagation of biological and chemical contaminants of water in soil, plants and humans. The present project will apply in irrigation reclaimed water obtained with different treatments to three types of crops (carrot, lettuce and tomato). Its evaluation will allow relating the technologies of water reclamation with its impact and risk for the consumption of the horticultural products obtained.
The chemical contaminants present in the irrigation water will be evaluated and their level of ecotoxicity determined (by estimating the hazard ratios, HQ). The levels present in the produced vegetables will also be evaluated to estimate the food security derived from their consumption (through the calculation of the estimated daily intake, EDI).This will be related with the soil and water contents of pollutants, thus assessing the bioavailability when possible.
Due to its environmental importance and impact on the consumer, the evaluation of pesticides and their processing products, both in water and in foods produced according to European Regulations and Directives 2009/128 / EC, 2006/125 / EC, 2006 / 125 / EC, 213/39 / EC shall be comprehensive. Thus, it will be possible to estimate the potential use or limitations of the reuse processes in the production of vegetal foods. Even those of special significance as they are; baby food or organic products.
The integration of all the results achieved will be the basis for establishing the first regulatory recommendations on acceptable levels of the chemical and microbiological quality parameters of treated wastewater for use in agricultural irrigation.
The treatments and application systems studied will be evaluated using various environmental tools (HACCP: Hazard Analysis and Critical Control Points, PSS: Sanitation Security Plans) and economic (cost-benefit) tools. All this is part of the new (2015) European policy based on the circular economy (EC), which, among other warnings, recommends the treatment and reuse of wastewater.