Gray Water Recovery System Model by Solar Photocatalysis with TiO₂ Nanoparticles for Crop Irrigation

Abstract

The objective of the study was to establish the configuration of the system model to allow the effective recovery of gray water by solar photocatalysis with TiO 2 nanoparticles for irrigation of crops. A programmable solar photoreactor based on an S7 1500 PLC and online measurement sensors were used as materials. The inductive method was used to analyze the samples and the deductive method to determine the water quality. The research design used was experimental based on the response surface methodology (MSR) with 20 experiments, 6 of which were central experiments and 6 were axial experiments; these experiments were carried out on sunny days. As a result of the research, a gray water recovery model was obtained, part of this being an electronic system with a programmable photocatalyst, which allowed the development of the experiments. It was concluded that with a solar UV index of 12.21, a dose of titanium dioxide (TiO 2 ) nanoparticles 1.973 g/L and with an exposure period of 60.041 minutes of the solar photocatalyst to UV radiation on sunny days, gray water was recovered in 90% with a confidence level of 95% and a significance α = 0.05, which translates into excellent quality according to the water quality index established in Peru (ICA-PE).

Assessing the Feasibility of Recovering Water from Treated Municipal Wastewater

“…In response to emerging water scarcity challenges, one alternative is to implement wastewater reclamation. The situation is similar in the case of, for example, rainwater [Smith et al 2018, Ramm, Smol 2023, Carbajal-Morán et al 2021. Rainwater recovery, which is not only a pro-ecological initiative but also an investment that reduces the cost of tap water charges, is gaining popularity [Bator, Piechurski 2019].…”

Evaluation of the Control of Environmental Variables in a Pine Seedling Greenhouse

“…A greenhouse is a facility with special characteristics conditioned for the production of plants or seedlings, where environmental conditions are managed in such a way as to neutralize the effects of climatic phenomena, generating favorable environmental conditions for their development [10][11][12]. In greenhouses it is also possible to control the quality of the water, which can even be gray water recovered for irrigation [13].…”