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| Titel |
Removal of biocolloids suspended in reclaimed wastewater by injection in a fractured aquifer model |
| VerfasserIn |
Constantinos V. Chrysikopoulos, Costantino Masciopinto, Rosanna La Mantia, Ioannis D. Manariotis |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250037563
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| Zusammenfassung |
| Two pilot-scale fractured aquifer models (FAMs) consisting of horizontal limestone slabs
were employed to investigate the removal of biocolloids suspended in reclaimed wastewater.
To better understand the behavior of real fractured aquifers, these FAMs intentionally were
not “clean.” The fracture apertures were randomly spread with soil deposits and both
FAMs were pre-flooded with reclaimed wastewater to simulate the field conditions
of the Nardò fractured aquifer in the Salento area, Italy, where fractures are not
clean due to artificial groundwater recharge. One of the FAMs was injected with
secondary effluent from a wastewater treatment plant collected prior to the chlorination
step, and the other with exactly the same effluent, which was further treated in a
commercial membrane reactor. Consequently, the organic and pathogen concentrations
were considerably higher in the secondary effluent than in the membrane reactor
effluent. Injected wastewater was continuously recirculated. Pathogen removal was
greater for the secondary wastewater than the cleaner membrane reactor effluent. A
simple mathematical model was developed to describe fracture clogging. The results
suggest that the hydraulic conductivity of FAMs can be significantly degraded due to
retention of viable and inactivated biocolloids suspended in reclaimed wastewater. |
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