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Continuous degradation of micropollutants in real world treated wastewaters by photooxidation in dynamic conditions

Abstract : Wastewater is a major issue for the ecosystem because of its considerable quantities, the treatment methods adopted in the large majority of WWTPs, and its level of contamination by various types of pollutants, especially emerging ones. One of the solutions considered to reduce this pressure on water is the reuse of wastewater after treatment for watering green areas, road cleaning, industry, groundwater recharge but also for crop irrigation. This paper proposes to study the capabilities of a photoreactor for the removal of micropollutants contained in wastewater from wastewater treatment plants. The experiments are carried out under dynamic artificial irradiation conditions which can be controlled in order to apply irradiation representative of the sunshine conditions. The experiments aim at treating a real effluent from urban wastewater. On the basis of these data, the photo-oxidation mass capacities expressed per unit of irradiated surface and per day were evaluated. Our results show that the oxidation process acts in a selective and differentiated manner according to the categories of substances and within each category. Some molecules are not or only partially oxidized. Note that the photoreactor fed continuously with wastewater from wastewater treatment plants containing about 80 substances, is subjected to a typical irradiation setpoint of a sunny day in April. This allows to define the instantaneous and daily capacities of the system with respect to the target molecules.
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https://hal-cnrs.archives-ouvertes.fr/hal-03735860
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Submitted on : Friday, July 22, 2022 - 8:40:39 AM
Last modification on : Saturday, July 23, 2022 - 3:28:00 AM

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Brice Reoyo-Prats, Anastasia Sellier, Somar Khaska, Corinne Le Gal Lassalle, Karine Weiss, et al.. Continuous degradation of micropollutants in real world treated wastewaters by photooxidation in dynamic conditions. Water Research, IWA Publishing/Elsevier, 2022, 221, pp.118777. ⟨10.1016/j.watres.2022.118777⟩. ⟨hal-03735860⟩

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