Fig. 2. Bacteriophage PRD1 and bromide breakthrough curves. (a) High-load cell, Study 1; (b) High-load cell, Study 2; (c) Low-load cell, Study 2. C/C₀ = log₁₀ (effluent at 0.6 m)/log₁₀ (influent). Bromide was not detected in the Study 1 low-load cell.