Evaluation of hybrid treatments to produce high quality reuse water

Four tertiary hybrid treatments to produce high quality reused water, fulfilling Brazilian drinking water regulations, from a slaughterhouse9s secondary treated effluent were evaluated. The pilot plant with a capacity of 500 L h −1 was set up and consisted of these stages: pre-filtration system (cartridge filter 50 micron, activated carbon filter, cartridge filter 10 micron), oxidation (H 2 O 2 ) or second filtration (ceramic filter, UF) followed by UV radiation (90 L h −1 ). The best combination was T4: pre-filtration followed by H 2 O 2 addition and UV radiation (AOP H 2 O 2 /UV). Disinfection kinetics by T4 followed pseudo first-order kinetics: k T4 = 0.00943 s −1 or 0.00101 cm 2 mJ −1 . Three different zones (A, B, C) were observed in the UV 254 degradation kinetics (pseudo-first order kinetics): k 9 decreased over time ( k ′ A > k ′ B > k ′ C ).