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Ozone for color and COD removal of raw and anaerobically biotreated combined industrial wastewater

100%

Yasar A., Ahmad N., Chaudhry M. N., Rehman M. S. U., Khan A. A. A.

Polish Journal of Environmental Studies

2007

tom 16

nr 2

Ozonation was carried out for decolorization and COD removal of raw and anaerobically treated UASB (upflow anaerobic sludge blanket) combined industrial (mainly textile) effluent in a lab-scale bubble column reactor. Ozonation of anaerobic bioprocess effluent at a dose of 300 mg/h for 10 min resulted in 81% color and 75% COD removal (100 mgO3/80 mg COD) while for raw wastewater 25 min ozonation furnished 51% color and 67% COD removal (250 mgO₃/345 mg COD). Optimal process conditions for biotreated effluent (pH = 8 and temperature = 25°C) resulted in 100% color and 96% COD removal for 10 min ozonation (100 mgO₃/104 mg COD). Electrical energy comparison demonstrated that post ozonation required less electrical energy, 16 and 2.9 times as compared to pre ozonation.

Ograniczanie wyników

1 Polish Journal of Environmental Studies

1 Ahmad N.

1 Chaudhry M. N.

1 Khan A. A. A.

1 Rehman M. S. U.

1 Yasar A.

1 2007

Wyniki wyszukiwania

Ozone for color and COD removal of raw and anaerobically biotreated combined industrial wastewater