7 Ways to Dispose of Brine Waste. Reverse osmosis is widely used to treat water in industrial and agricultural applications. It effectively removes salts and contaminants from brackish, seawater or wastewater. Reverse osmosis produces a clean stream of high purity water, and as well a smaller stream of waste, referred to as concentrate or brine. Brine is a highly concentrated solution of the salts and contaminants separated from the water with the reverse osmosis membranes. Brine requires proper disposal, which many times requires permits or other regulatory compliance actions.