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Anoxic transformations of wastewater organic matter in sewers - process kinetics, model concept and wastewater treatment potential

Abdul-Talib, S. and Hvitved-Jacobsen, T. and Vollertsen, J. and Ujang, Zaini (2002) Anoxic transformations of wastewater organic matter in sewers - process kinetics, model concept and wastewater treatment potential. Water Science and Technology, 45 (3). pp. 53-60. ISSN 0273-1223

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Abstract

The sewer is an integral part of the urban wastewater system: the sewer, the wastewater treatment plant and the local receiving waters. The sewer is a reactor for microbial changes of the wastewater during transport, affecting the quality of the wastewater and thereby the successive treatment processes or receiving water impacts during combined sewer overflows. This paper presents the results of studies on anoxic processes, namely denitrification, in the bulk water phase of wastewater as it occurs in sewers. Experiments conducted on 12 different wastewater samples have shown that the denitrification process in the bulk wastewater can be simplified by the reduction of nitrate to nitrogen with significant accumulation of nitrite in the water phase. Utilization of nitrate was observed not to be limited by nitrate for concentrations above 5 gNO3-N/m3. The denitrification rates, under conditions of excess substrate and electron acceptor, were found to be in the range of 0.8–2.0 g NO3-N/(m3h). A discussion on the interaction of the sewer processes and the effects on a downstream located wastewater treatment plant (WWTP) is provided

Item Type:Article
Uncontrolled Keywords:Anoxic processes; denitrication; in-sewer processes; nitrite; nitrous oxide; nitrate utilization rate
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
Divisions:Civil Engineering
ID Code:2609
Deposited By: Ms Zalinda Shuratman
Deposited On:14 May 2007 00:32
Last Modified:01 Jun 2010 03:03

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