Life cycle and economic assessments of engineered osmosis and osmotic dilution for desalination of Haynesville shale pit water

• Life cycle assessment of engineered osmosis and osmotic dilution are performed • Environmental impacts of forward osmosis can be competitive with deep well disposal • The cost of FO can be significantly lower (up to 60%) than deep well disposal • FO energy demand with no upstream pretreatment is a hurdle for further development

The comparative LCIA of the three different pit water management scenarios demonstrates that the potential environmental impacts of Water management cost, $/bbl 4.5 Total Water Management Cost Total Treatment Cost 3.5 2.5 1.5 0.5 Fig. 8. Water management costs ($/bbl pit water) for deep well disposal and the energy scenarios for the engineered osmosis and osmotic dilution processes. The solid data bars represent the total cost of pit water management for each scenario, including the cost of wastewater trucking and disposal at a deep well injection facility. The hashed data bars represent only the costs associated with operating each FO treatment system; the costs of wastewater trucking and deep well injection are removed.