Institute of Functional Interfaces

Impact of Calcite on Phosphorus Removal and Recovery from Wastewater Using CSH-Filled Fixed Bed Filters

  • chair:

    Berg, U. / Ehbrecht, A. / Röhm, E. / Weidler, P.G. / Nüesch, R. (2007)

  • place:  J. Res. Sci.& Tech. 4 (2007), 2, 73-81

  • Date: 2007
  • Berg, U. / Ehbrecht, A. / Röhm, E. / Weidler, P.G. / Nüesch, R. (2007): „Impact of Calcite on Phosphorus Removal and Recovery from Wastewater Using CSH-Filled Fixed Bed Filters“. In:  J. Res. Sci.& Tech. 4 (2007), 2, 73-81

Abstract

Phosphorus (P) resources expiring in the next similar to 100 years reveal the necessity to search for alternatives. Investigations focused on the P-recovery straight from wastewater in one single process by means of laboratory long-term column experiments using two carrier materials-calcium silicate hydrate (CSH) and calcite (cc). Both, pure materials and mixtures of both substrates were applied.

The efficiency of the P-recovery process was significantly dominated by the CSH content. However, a considerable improvement of the P-elimination was affected by using two consecutive columns with pure materials, i.e. pre-filtration through a cc column. Hydroxylapatite-like products were formed as potential recyclables.