Valoración físico-química y fitotóxica de las aguas residuales depuradas/regeneradas destinadas al riego agrícola

  1. J. A. Pérez Donato 1
  2. L. Vera 2
  3. L. R. Bravo Sánchez 1
  4. Sebastián N. Delgado Díaz 3
  5. Enrique González Cabrera 3
  1. 1 Universidad Central de Las Villas
    info

    Universidad Central de Las Villas

    Santa Clara, Cuba

    ROR https://ror.org/01cdy6h50

  2. 2 Universidad de Cuenca
    info

    Universidad de Cuenca

    Cuenca, Ecuador

    ROR https://ror.org/04r23zn56

  3. 3 Universidad de La Laguna
    info

    Universidad de La Laguna

    San Cristobal de La Laguna, España

    ROR https://ror.org/01r9z8p25

Journal:
Revista de toxicología

ISSN: 0212-7113

Year of publication: 2015

Volume: 32

Issue: 2

Pages: 140-143

Type: Article

Abstract

The most widespread application of reuse of treated / reclaimed domestic wastewater is agricultural irrigation. The common regulations on quality of reclaimed water for reuse contemplated physicochemical and biological parameters to minimize health risks, but rarely taken into account phytotoxic parameters that may be limiting for agricultural applications. The physicochemical and phytotoxic parameters change to advance the degree of purification / regeneration of wastewater, so it is of interest to know what stage of the installation provides adequate water for irrigation. This paper presents a correlation study of phytotoxicity with physicochemical parameters in water samples taken at the end of each of the stages of conventional treatment of domestic sewage, including biological reactor activated sludge treatment and tertiary sand filtration, chlorination, filtration cartridge and desalination by electrodialysis reversal. In each sample was measured. Chemical oxygen demand, pH, conductivity, organic carbon, total phosphorus, soluble proteins and ions of Na, K, Ca, Mg, B, F and Cl criteria phytotoxicity were evaluated by Lactuca sativa biomarker.Results showed significant reductions in physicochemical parameters of electrodialysis process, while the effects of phytotoxicity showed reductions in the processes before the final stage of electrodialysis.We conclude that the physico-chemical, together with the biomarker parameters are aspects of practical interest that relates the type of treatment with physical-chemical quality and phytotoxicity of treated / reclaimed water obtained and their suitability for agricultural irrigation applications.