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BioMed Research International
Volume 2013 (2013), Article ID 957853, 8 pages
http://dx.doi.org/10.1155/2013/957853
Research Article

Combined Industrial Wastewater Treatment in Anaerobic Bioreactor Posttreated in Constructed Wetland

1Department of Environmental Sciences, COMSATS Institute of Information Technology, Abbottabad 22060, Pakistan
2Department of Natural Resources Engineering and Management, University of Kurdistan, Hewler, Iraq

Received 17 October 2013; Accepted 13 November 2013

Academic Editor: Chong-Jian Tang

Copyright © 2013 Bibi Saima Zeb et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Constructed wetland (CW) with monoculture of Arundo donax L. was investigated for the posttreatment of anaerobic bioreactor (ABR) treating combined industrial wastewater. Different dilutions of combined industrial wastewater (20, 40, 60, and 80) and original wastewater were fed into the ABR and then posttreated by the laboratory scale CW. The respective removal efficiencies of COD, BOD, TSS, nitrates, and ammonia were 80%, 78–82%, 91.7%, 88–92%, and 100% for original industrial wastewater treated in ABR. ABR was efficient in the removal of Ni, Pb, and Cd with removal efficiencies in the order of Cd (2.7%) > Ni (79%) > Pb (85%). Posttreatment of the ABR treated effluent was carried out in lab scale CW containing A. donax L. CW was effective in the removal of COD and various heavy metals present in ABR effluents. The posttreatment in CW resulted in reducing the metal concentrations to 1.95 mg/L, 0 mg/L, and 0.004 mg/L for Ni, Pb, and Cd which were within the permissible water quality standards for industrial effluents. The treatment strategy was effective and sustainable for the treatment of combined industrial wastewater.