A novel combined solar pasteurizer/TiO2 continuous-flow reactor for decontamination and disinfection of drinking water

摘要: Abstract A new combined solar plant including an annular continuous-flow compound parabolic collector (CPC) reactor and a pasteurization system was designed, built, tested for simultaneous drinking water disinfection chemical decontamination. The did not use pumps had no electricity costs. First, continuously flowed through the CPC then entered pasteurizer. temperature flow from effluent were controlled by thermostatic valve located at pasteurizer outlet that opened 80 °C. process simulated studying effect of heat treatment on death kinetic parameters (D z values) Escherichia coli K12 (CECT 4624). 99.1% bacteria photo-inactivation reached in TiO2–CPC (0.60 mg cm−2 TiO2), decontamination terms antipyrine degradation increased with increasing residence time system, reaching 70% degradation. generation hydroxyl radicals (between 100 400 nmol L−1) key factor efficiency. Total thermal inactivation attained after all cases. Chemical bacterial improved addition 150 mg L−1 H2O2, which generated approximately 2000–2300 nmol L−1 HO● radicals. Finally, modelling photoreactor evaluated. superficial liquid velocity overall rate constant also studied. Both E. coli found to be catalyst surface reaction rate.