title: Greywater as a sustainable water source: A photocatalytic treatment technology under artificial and solar illumination.
abstract: Greywater considers being a highly reclaimable water source particularly important for water-stressed nations. In this work, heterogeneous photocatalysis using artificial and solar illumination has been applied for the mineralization of simulated light greywater (effluents from dishwashers and kitchen sinks were excluded from the study). The effects on the process' efficiency of TiO2P25 catalyst's concentration, initial concentration of H2O2and Fe3+, pH of the solution, as well as the type of radiation, were evaluated in a bench-scale Pyrex reactor and a pilot-scale slurry fountain photoreactor. The treatment efficiency has been followed through the evolution of the organic matter content expresses as dissolved organic carbon (DOC). Best results were obtained with the photo-Fenton-assisted TiO2photocatalytic process with 72% DOC removal after 210 min of bench scale treatment, while under the same photocatalytic conditions in the pilot reactor the DOC removal reached almost 64%. Moreover, the decrease in toxicity, phytotoxicity and biodegradability of the simulated wastewater has been observed after solar-induced photocatalytic treatment.
authors: Laboratory of Physical Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
authors: Sophia
authors: S
authors: Tsoumachidou
authors: Laboratory of Physical Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
authors: Theodora
authors: T
authors: Velegraki
authors: Laboratory of Physical Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; Laboratory of Applied Soil Science, School of Agriculture, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
authors: Apostolos
authors: A
authors: Antoniadis
authors: Laboratory of Physical Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece. Electronic address: poulios@chem.auth.gr.
authors: Ioannis
authors: I
authors: Poulios
mesh_terms: D006861:Hydrogen Peroxide / Q000737:chemistry*; D007501:Iron / Q000737:chemistry; D008029:Lighting; D013472:Sunlight; D014865:Waste Disposal, Fluid; D014867:Water; D014874:Water Pollutants, Chemical / Q000737:chemistry; D018508:Water Purification
chemical_list: D014874:Water Pollutants, Chemical; D014867:Water; D006861:Hydrogen Peroxide; D007501:Iron
keywords: AOPs; Greywater; Photocatalysis; Recycled water; Solar; Wastewater reuse