Abstract
Chemical precipitation was evaluated for phosphorus removal on trickling filter plants to assess suitability for meeting the requirements of the EC Urban Wastewater Treatment Directive. Pre-, simultaneous and post-precipitation options have all been shown to be capable of meeting the 2mg/l standard. Pre- and post-precipitation options can meet the 1mg/l standard. For the lower standard careful attention needs to be paid to the rapid mixing and subsequent flocculation of the coagulant. The phosphorus solubility equilibrium has been shown to be an important source of additional load from the primary settlement tanks if they are used for sludge storage.
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References
Klute, R.: Role of Mixing in the Coagulation Process. Paper presented to ICHemE Seminar “The Water Industry and Mixing Technology”, 7 October 1992.
Gillberg, L., Nillson, D., Åkesson, M.: The Influence of pH when Precipitating Or-thophosphate with Aluminium and Iron Salts. Chemical Water and Wastewater Treatment IV, H.H. Hahn, E. Hoffmann, and Ødegaard (Eds.). Springer, Berlin Heidelberg New York 1996.
ASCE, Design of Municipal Wastewater Treatment Plants — Vol.1, 1992. ISBN 0-943244-84-6.
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© 1998 Springer-Verlag Berlin Heidelberg
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Pearce, P.A. (1998). Options for Phosphorus Removal on Trickling Filter Plants. In: Hahn, H.H., Hoffmann, E., Ødegaard, H. (eds) Chemical Water and Wastewater Treatment V. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-72279-0_20
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DOI: https://doi.org/10.1007/978-3-642-72279-0_20
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-72281-3
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