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Title: Biological treatability of domestic and industrial wastewaters in a treatment plant
Authors: Masu, Smaranda
Jurj, Nicoleta Luminita
Murariu, Marcel
Savescu, Elena
Keywords: Wastewaters;Treatability;Chemical oxygen demand;Biodegradability
Issue Date: 2012
Urban development produces wastewaters with flow and/or concentration peaks which prejudice the well functioning of a wastewater plant designed for influent categories characterized by certain domains of composition and concentration. This study aimed to investigate the conventional physico-chemical and biological treatability parameters of the influent and the removal efficiency of the treatment plants: high carbonic loading, chemical oxygen demand (COD), and low biodegradability as BOD5/COD (biochemical oxygen demand/chemical oxygen demand) ratio. The improvement of the biological biodegradability parameters in order to obtain a proper activated sludge was achieved by optimal oxygen and nutrients addition. Molasses addition to correct the BOD5/COD ratio to values ≥ 0.4, determines the increase up to 60-80% of biodegradable organic matter mineralization. COD efficiency removal increases by 1-20% vs. the results obtained for oxygen deficit and/or low biological treatability.
The 18th Symposium on Analytical and Environmental Problems with special emphasis on heavy metal ions as contaminants, 24 September 2012, Szeged, Hungary, Conference Proceedings, pp. 48-51
ISBN: 978-963-306-165-7
Appears in Collections:Conference Papers

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