Universidad Complutense de Madrid
E-Prints Complutense

Assessing the application of advanced oxidation processes, and their combination with biological treatment, to effluents from pulp and paper industry

Impacto

Downloads

Downloads per month over past year



Merayo Cuevas, Noemí and Hermosilla Redondo, Daphne and Blanco Jaen, Laura and Cortijo, Luis and Blanco Suárez, Ángeles (2013) Assessing the application of advanced oxidation processes, and their combination with biological treatment, to effluents from pulp and paper industry. Journal of Hazardous Materials, 262 . pp. 420-427. ISSN 0304-3894

[img]
Preview
PDF
195kB

Official URL: http://www.sciencedirect.com/science/article/pii/S0304389413006493



Abstract

The closure of water circuits within pulp and paper mills has resulted in a higher contamination load of the final mill effluent, which must consequently be further treated in many cases to meet the standards imposed by the legislation in force. Different treatment strategies based on advanced oxidation processes (ozonation and TiO2-photocatalysis), and their combination with biological treatment (MBR), are herein assessed for effluents of a recycled paper mill and a kraft pulp mill. Ozone treatment achieved the highest efficiency of all. The consumption of 2.4 g O3 L−1 resulted in about a 60% COD reduction treating the effluent from the kraft pulp mill at an initial pH = 7; although it only reached about a 35% COD removal for the effluent of the recycled paper mill. Otherwise, photocatalysis achieved about a 20–30% reduction of the COD for both type of effluents. In addition, the effluent from the recycled paper mill showed a higher biodegradability, so combinations of these AOPs with biological treatment were tested. As a result, photocatalysis did not report any significant COD reduction improvement whether being performed as pre- or post-treatment of the biological process; whereas the use of ozonation as post-biological treatment enhanced COD removal a further 10%, summing up a total 90% reduction of the COD for the combined treatment, as well as it also supposed an increase of the presence of volatile fatty acids, which might ultimately enable the resultant wastewater to be recirculated back to further biological treatment.


Item Type:Article
Uncontrolled Keywords:Advanced oxidation processes; Photocatalysis; Ozonation; Membrane bioreactor; Pulp and paper industry effluent
Subjects:Sciences > Chemistry > Paper industry
Sciences > Chemistry > Chemical engineering
Sciences > Chemistry > Environmental conditions
ID Code:26419
Deposited On:27 Nov 2014 09:39
Last Modified:27 Nov 2014 09:45

Origin of downloads

Repository Staff Only: item control page