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Effects of different parameters on photocatalytic oxidation of slaughterhouse wastewater using TiO2 and silve-doped TiO2 nanoparticles

100%

Bukhari K., Ahmad N., Sheikh I. A., Akram T. M.

Polish Journal of Environmental Studies

2019

tom 28

nr 3

Our study used a photocatalytic oxidation process for degrading slaughterhouse wastewater (SHWW). Characterization of the wastewater before and after treatment with TiO₂ and Ag-TiO₂ in terms of BOD, COD, and nitrogen was done. The effect of hydrogen peroxide, ozone, and various operating parameters such as catalyst dose, pH, and reaction time on the degradation efficiency of the process were also investigated. An increase in catalyst dose and reaction time increased process efficiency. However, process efficiency was decreased with elevating pH. The results also revealed that the type of catalyst and their operating parameters have significant influence on the oxidation of SHWW. Ag-TiO₂ -H₂O₂ catalyst under UV (400watt) irradiation was found to be best for the degradation of SHWW and resulted in 95% BOD, 87% COD, and 74% nitrogen removal.

Disinfection of UASB-treated municipal wastewater by H2O2, UV, ozone, PAA, H2O2/sunlight, and advanced oxidation processes: regrowth potential of pathogens

88%

Rizvi H., Ahmad N., Yasar A., Bukhari K., Khan H.

Polish Journal of Environmental Studies

2013

tom 22

nr 4

Disinfection of anaerobically treated municipal wastewater was done using ozone, UV, H2O2, peracetic acid, and advanced oxidation processes (O3/H2O2, O3/UV, H2O2/UV, H2O2/sunlight). Ozone, UV irradiation, and H2O2 eliminated 99% of pathogens (total coliform, fecal coliform, and E. coli) at ozonation time of 20 min at the rate of 1000 mg/hr; UV irradiation time of 11 min and H2O2 dose of 336 mg/L. The use of combined systems (H2O2/sunlight) is especially promising due to the synergistic effect and cost efffectiveness. Regrowth of pathogens increased with increase in time and temperature (from 15 to 35ºC). The presence of nutrients and fluorescent light enhanced the rate of reactivation of pathogens.

Ograniczanie wyników

2 Polish Journal of Environmental Studies

2 Ahmad N.

2 Bukhari K.

1 Akram T. M.

1 Khan H.

1 Rizvi H.

1 Sheikh I. A.

1 Yasar A.

1 2019

1 2013

Wyniki wyszukiwania

Effects of different parameters on photocatalytic oxidation of slaughterhouse wastewater using TiO2 and silve-doped TiO2 nanoparticles

Disinfection of UASB-treated municipal wastewater by H2O2, UV, ozone, PAA, H2O2/sunlight, and advanced oxidation processes: regrowth potential of pathogens