June 15, 2008--State wants cleaner water filtration (Pueblo Chieftain)
Membrane filtration, on the scale used by cities in reverse osmosis operations, results in a briny solution that represents an increasing headache for water providers. If released to streams, the brine can reduce water quality and regulations are tightening. If evaporated, a large area of land must be sacrificed for the task. If heated, the water can be recaptured, but at great expense. Or, it could be injected into deep wells, potentially risky. To help cities cope with those dilemmas, the state Water Quality Control Commission is embarking on an $1.1 million pilot study, involving La Junta and Brighton, to achieve ‘zero liquid discharge’ from municipal reverse-osmosis operations.
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