Impactos del uso de agua regenerada en la agricultura: optimización de las tecnologías de tratamiento y riesgos en el sistema suelo-planta.
2023
Fellahi, Imane
This thesis addresses removal of Contaminants of Emerging Concern (CECs) from WWTP effluents, and evaluation of risks associated with their reuse in agriculture. Three treatment technologies were investigated for the removal of pharmaceuticals, including COVID-19 related compounds. The technologies encompass Solar/UV-LED photocatalysis, an Ozone system with Micro-Nano Bubbles (OMNB), and Granular Activated Carbon (GAC). MNBs greatly enhanced ozone's ability to remove CECs compared to traditional O3 methods. The best results were seen at a flow rate of 2000 L/h and 15.9 gO3/h. An initial assessment of the generated transformation products was presented. The CPC/UV-LED-TiO2 system, featuring a self-designed UV-LED, was more efficient than commercial lamps. The adsorbent MG1050, was implemented in a 3-module pilot prototype featuring disc-filtration, GAC bed adsorption, and UV disinfection. Outcomes were promising, with nearly 100% CEC elimination efficiencies in the regeneration system. An agronomic evaluation of effluent quality from different technologies assessed their impact on lettuce and carrot crops.
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