Journal
CHEMOSPHERE
Volume 87, Issue 8, Pages 962-968Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2012.01.057
Keywords
Wastewater treatment efficiency; Industrial wastewater; Organic pollutants; Environmetrics; Multivariate statistics
Categories
Funding
- Human Capital Programme [POKL.04.01.01-00-368/09]
- Polish Ministry of Science and Higher Education [NN 523 562838]
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The self-organising map approach was used to assess the efficiency of chlorinated solvent removal from petrochemical wastewater in a refinery wastewater treatment plant. Chlorinated solvents and inorganic anions (11 variables) were determined in 72 wastewater samples, collected from three different purification streams. The classification of variables identified technical solvents, brine from oil desalting and runoff sulphates as pollution sources in the refinery, affecting the quality of wastewater treatment plant influent. The classification of samples revealed the formation of five clusters: the first three clusters contained samples collected from the drainage water, process water and oiled rainwater treatment streams. The fourth cluster consisted mainly of samples collected after biological treatment, and the fifth one of samples collected after an unusual event. SOM analysis showed that the biological treatment step significantly reduced concentrations of chlorinated solvents in wastewater. (C) 2012 Elsevier Ltd. All rights reserved.
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