Author(s): Assalin MR, Dos Santos Almeida E, Durn N
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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-O3/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-O3/pH 10 and activated sludge-O3/pH 8.3 affected mainly the TOC and total phenol removal values.
This article was published in Int J Environ Res Public Health
and referenced in Journal of Bioremediation & Biodegradation