combined system of activated sludge and ozonation for the treatment of kraft e1 effluent结合活性污泥系统和臭氧化治疗卡夫e1废水.pdfVIP

Int. J. Environ. Res. Public Health 2009, 6, 1145-1154; doi:10.3390/ijerph6031145 OPEN ACCESS International Journal of Environmental Research and Public Health ISSN 1660-4601 /journal/ijerph Article Combined System of Activated Sludge and Ozonation for the Treatment of Kraft E Effluent 1 Marcia Regina Assalin *, Edna dos Santos Almeida and Nelson Durán Laboratório de Química Biológica, Instituto de Química, Universidade Estadual de Campinas CP 6154, CEP 13084-971, Campinas, SP, Brazil; E-Mails: ednasa@.br (E.S.A.); duran@iqm.unicamp.br (N.D.) * Author to whom correspondence should be addressed; E-Mail: massalin@cnpma.embrapa.br Received: 18 December 2008 / Accepted: 10 March 2009 / Published: 17 March 2009 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 /pH 10 treatment was able to remove around 3 80% of COD, TOC and color from Kraft E1 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 phe