AWWA WQTC64101

The objectives of this slide presentation were to: investigate several innovative ideas to minimize reverse osmosis (RO)-concentrate volume; and, investigate innovative beneficial reuse alternatives of RO-concentrate. Concentrate Minimization Strategies included: optimize RO Operational Condition; and, Optimize Inter-stage Chemical treatment. All tests were conducted in bench-scale with RO-concentrate collected from Rio-rancho pilot site. Conclusions indicated that: BMED is feasible to produce acids and bases, and the concentration of acid and base solution cab be high enough; Electrolytic Chlorine generation is feasible to produce hypochlorite and the concentration of chlorine solution can be 8000 mg/L; struvite recovery is technically feasible, but economically might not be viable; this process can be integrated with other beneficial reuse strategies as a phosphate removal process; easy to implement; economically beneficial; and, some impurities accumulate in products, but they are site specific, and can be eliminated using pretreatment. Includes figures.