Combined System of Activated Sludge and Ozonation for the Treatment of Kraft E 1 Effluent

Marcia Regina Assalin, Edna dos Santos Almeida and Nelson Durán
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Marcia Regina Assalin: Laboratório de Química Biológica, Instituto de Química, Universidade Estadual de Campinas CP 6154, CEP 13084-971, Campinas, SP, Brazil
Edna dos Santos Almeida: Laboratório de Química Biológica, Instituto de Química, Universidade Estadual de Campinas CP 6154, CEP 13084-971, Campinas, SP, Brazil
Nelson Durán: Laboratório de Química Biológica, Instituto de Química, Universidade Estadual de Campinas CP 6154, CEP 13084-971, Campinas, SP, Brazil

IJERPH, 2009, vol. 6, issue 3, 1-10

Abstract: The treatment of paper mill effluent for COD, TOC, total phenols and color removal was investigated using combined activated sludge-ozonation processes and single processes. The combined activated sludge-O 3 /pH 10 treatment was able to remove around 80% of COD, TOC and color from Kraft E 1 effluent. For the total phenols, the efficiency removal was around 70%. The ozonation post treatment carried out at pH 8.3 also showed better results than the single process. The COD, TOC, color and total phenols removal efficiency obtained were 75.5, 59.1, 77 and 52.3%, respectively. The difference in the concentrations of free radical produced by activated sludge-O 3 /pH 10 and activated sludge-O 3 /pH 8.3 affected mainly the TOC and total phenol removal values.

Keywords: Activated sludge; ozonation; combined processes; Kraft E1 effluent (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2009
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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