Table 2 Chemical agent, concentration [%], pH values, usage point, contact time (min) and purpose of each solution in the water purification
Chemical Agent | Concentration [%] | pH | Usage Point | Contact Time (minutes) | Purpose |
|---|---|---|---|---|---|
Hydrogen Peroxide + Peracetic Acid | 2.2+0.45 | 2.1 | Reverse Osmosis, Deionization | 180 | Disinfectant |
Ethyl Alcohol | 70.0 | 7.2 | Sampling Points | 1 | Disinfectant |
Sodium Hypochlorite | 0.5 | 11.9 | Storage Tank, Loop of Distribution | 60 | Disinfectant |
Sodium Bissulphate | 1.0 | 4.0 | Multimedia Filters, Softener, Carbon Filter | 90 | Dechlorination |
Sodium Hydroxide | 0.4 | 12.8 | Reverse Osmosis, Continuous Deionization | 30 | pH adjustment |
Citric Acid | 0.5 | 2.4 | Reverse Osmosis | 30 | pH adjustment |
Chloridric Acid | 0.5 | 0.3 | Deionization | 30 | pH adjustment |