Author： Villaverde Santiago Lacalle María-Luisa García-Encina Pedro A. Fdz-Polanco Fernando
Publisher： Water Environment Federation
ISSN： 1938-6478
Source： Proceedings of the Water Environment Federation, Vol.2001, Iss.5, 2001-01, pp. : 162-169
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Abstract
The present work deals with the upgrading of conventional Activated Sludge (AS) and Sequential Batch Reactor (SBR) technologies for treating industrial wastewater. The aim is to obtain total nitrogen removal in a single AS and SBR system by implementing short aeration cycles. This operational strategy has been proven to be adequate for total nitrogen removal from high strength wastewater containing nitrogen (up to 700 mg NKT/L) and organic matter (up to 2,000 mg COD/L). Short-cycled aeration allowed for a more efficient use of the oxygen supply for nitrification and the organic carbon content present in the wastewater for denitrification. The results here reported show that initially the tested technology is feasible and can report significant cuts on operation and maintenance when compared to conventional AS and SBR processes. Total nitrogen removal up to 79% was attained treating the effluent of an UASB process designed for treating the wastewater of a potato starch factory. Total nitrogen removal capacities ranging between 0.2 and 0.65 kg of nitrogen per cubic meter per day are reported.
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