Biological treatment of tannery wastewater in the presence of chromium

Journal of Environmental Management
G FarabegoliE Rolle

Abstract

Experiments were carried out to determine the feasibility of treating tannery wastewater containing chromium, an inhibiting compound, with sequencing batch reactors (SBR). The maximum chromium concentration tolerated by microorganisms was determined through aerobic and anoxic batch experiments, and the biomass inhibition process was analyzed in a lab scale reactor at increasing chromium concentrations. The results obtained, in batch experiments and in the SBR reactor, have demonstrated that chromium addition had less influence on the denitrification bacteria than on the nitrification bacteria. In addition, it was observed that nitrification and denitrification rates, at the same chromium concentration, were higher in the SBR reactor than in batch experiments with unacclimated biomass. Experimental results confirm that sequencing batch reactors are able to produce a more resistant biomass, which acclimates quickly to inhibiting conditions. A large amount of chromium was found in the sludge from the reactor, while the effluent was devoid of the inhibiting metal.

Citations

May 31, 2012·TheScientificWorldJournal·Ehsanul KabirRichard J C Brown
Mar 8, 2011·Journal of Hazardous Materials·Girish R PophaliT Nandy
Jun 6, 2013·The Science of the Total Environment·Giusy LofranoDerin Orhon
Feb 3, 2015·Biotechnology and Applied Biochemistry·Paniz IzadiAli Ghoreyshi
Jun 28, 2008·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Sudan Raj Panthi, David Geraint Wareham
Aug 21, 2013·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·In-Soo KimSung-Cheol Koh
Mar 6, 2019·Environmental Science and Pollution Research International·Karthikeyan ChandrasekaranMaruthamuthu Sundaram

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