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Table 2 Operating parameters in the water treatment plant

From: Complex odor control based on ozonation/GAC advanced treatment: optimization and application in one full-scale water treatment plant

ProcessDesigned contact time (min)Coagulant (aluminum sulfate) concentration (mg L−1)aOzone dosage (mg L−1)aActual contact time (min)Backwash frequency
Pre-ozonation30–1.03.4
Flocculation2020–3023
Sedimentation120137
Sand filtration303424–48 h
Post-ozonation120–1.514
GAC12145–10 days
  1. aCoagulant concentration and ozone dosage may vary according to the actual influent qualities