Analytical methods: Residue characterisation, taking and presserving samples was done according to the Standard Methods for Examination of Water and Wastewater APHA, 2005.
Métodos analíticos: La caracterización de los residuos y la toma y preservación de muestras se llevaron a cabo conforme al ´Standard Methods for Examination of Water and Wastewater´ APHA, 2005.