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Download fileTargeted Removal of Dissolved Organic Matter in Boiler-Blowdown Wastewater: Integrated Membrane Filtration for Produced Water Reuse
journal contribution
posted on 2015-09-30, 00:00 authored by Gil Hurwitz, David
J. Pernitsky, Subir Bhattacharjee, Eric M.V. HoekThe efficacy of coagulation and membrane
filtration was studied
for the treatment of boiler-blowdown (BBD) wastewater to enable reuse
and minimize the overall water consumption in steam-assisted-gravity-drainage
(SAGD), thermally enhanced, oil recovery operations. Direct nanofiltration
of chemically unadjusted BBD at its original pH was the optimal treatment
option with respect to the flux stability and the removal of dissolved
organic material and salinity, which if not removed would result in
the fouling and failure of downstream process equipment. The naturally
high solute hydrophilicity allowed for prolonged operation with an
elevated flux of 60 L m−2 h−1 (LMH)
and recovery up to 85% while maintaining solute removal as high as
80% and 45% for dissolved organic carbon and total dissolved solids,
respectively. Comparatively, neither precoagulation nor preacidification
improved the rejection of dissolved organic material or salinity and
consistently resulted in increased membrane surface fouling and flux
decline. The proposed filtration treatment solution would result inasmuch
as a 4-fold reduction in the volume of makeup water required and BBD
wastewater disposed compared to a conventional SAGD facility.
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Keywords
oil recovery operationsProduced Water ReuseThe efficacyIntegrated Membrane Filtrationmaterialsolute removalmembrane filtrationBBD wastewatermakeup waterfiltration treatment solutionwater consumptionprocess equipmentmembrane surface foulingsolute hydrophilicityDissolved Organic MatterTargeted RemovalLMHSAGD facilityDirect nanofiltrationflux stabilityflux declinesalinitytreatment option