Modeling phosphate transport and removal in a compact bed filled with a mineral-based sorbent for domestic wastewater treatment
2013 (English)In: Journal of Contaminant Hydrology, ISSN 0169-7722, E-ISSN 1873-6009, Vol. 154, 70-77 p.Article in journal (Refereed) Published
Phosphorus filter units containing mineral-based sorbents with a high phosphate (PO4) binding capacity have been shown to be appropriate for removing PO4 in the treatment of domestic wastewater in on-site facilities. However, a better understanding of their PO4 removal mechanisms, and reactions that could lead to the formation of PO4 compounds, is required to evaluate the potential utility of candidate sorbents. Models based on data obtained from laboratory-scale experiments with columns of selected materials can be valuable for acquiring such understanding. Thus, in this study the transport and removal of PO4 in experiments with a laboratory-scale column filled with a commercial silicate-based sorbent were modeled, using the hydro-geochemical transport code PHREEQC. The resulting models, that incorporated the dissolution of calcite, kinetic constrains for the dissolution of calcium oxide (CaO) and wollastonite (CaSiO3), and the precipitation of amorphous tricalcium phosphate, Ca3(PO 4)2, successfully simulated the removal of PO4 observed in the experiments.
Place, publisher, year, edition, pages
2013. Vol. 154, 70-77 p.
Constructed wetlands, Filtration, On-site wastewater treatment, Phosphorus, PHREEQC, Reactive transport modeling
Oceanography, Hydrology, Water Resources
IdentifiersURN: urn:nbn:se:kth:diva-136129DOI: 10.1016/j.jconhyd.2013.08.007ISI: 000326665200007ScopusID: 2-s2.0-84885166607OAI: oai:DiVA.org:kth-136129DiVA: diva2:675523
QC 201312042013-12-042013-12-032013-12-06Bibliographically approved