DEMONSTRATING INNOVATIVE INLAND CONCENTRATE MANAGEMENT SOLUTIONS - SROG CONCENTRATE MINIMIZATION DEMONSTRATION PILOT TESTING PROJECT

摘要

The reclaimed water from the Sub-regional operating group (SROG) cities of Glendale, Mesa, Phoenix, Scottsdale, and Tempe is used for beneficial uses such as turf or crop irrigation, cooling water for power plants, and groundwater recharge / indirect potable reuse. The total dissolved solids (TDS) in the reclaimed water (usually above 1,000 mg/L) as well as the concentrations of individual ions adversely impact the reclaimed water reuse potential, as illustrated in Figure 1. High sodium concentration causes worsened soil condition on golf courses and the high chloride ions may jeopardize discharge permit compliance (e.g., Whole Effluent Toxicity failure). Chloride and sulfate cause infrastructure corrosion. High hardness requires softening and impacts the number of cycles that the reclaimed water can be reused as cooling water.