| The suitability of wastewater disposed of by deep well injection was assessed to identify candidate wastewaters for treatment by other means such that the treated stream could be discharged to surface waters or re-used in an industrial process. The project goal was consistent with the water conservation objective specified in Alberta's Water for Life Strategy. The suitability of wells operated under approval numbers 3924, 8185, 8926, 8713, 9699, and 8784 was not assessed because either inadequate data were available or the volume injected was below the 10,000 m³/mo minimum established in Phase I of this project.; The most suitable treatment sequence for the well operated under approval number 4779 may be a biofilter followed by nanofiltration/reverse osmosis membrane. This should be verified via bench-scale testing before proceeding to pilot- or full-scale treatment. The appropriate treatment for the well operated under approval number 8951 is most likely an American Petroleum Institute separator followed by demulsification of oil and dissolved air flotation with a membrane or a lagoon. The most feasible option for the well operated under approval number 5737 well is believed to be chemical flocculation followed by dissolved air floatation. The most effective alternative to deep well disposal for the wastes disposed under approval number 7842 well appears to discharge to the municipal sewer system. |
