SACRAMENTO Hilmar Cheese Co. won state approval Friday for a change to its waste-water treatment process.
The Central Valley Regional Water Quality Control Board voted unanimously to let the company test a new method for one of the final treatment steps at its Lander Avenue plant.
Waste-water from the plant, the world’s largest cheese producer, has drawn years of scrutiny from regulators and neighbors.
The change involves a part of the process that removes salts from the water. The current system uses reverse osmosis — forcing water through a membrane to trap the salts — for up to 1.4 million gallons a day.
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