GATE Civil Engineering
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The potable water is prepared from turbid surface water by adopting the following treatment sequence.

  1. Turbid surface water $\rightarrow$ Coagulation $\rightarrow$ Flocculation $\rightarrow$ Sedimentation $\rightarrow$ Filtration $\rightarrow$ Disinfection $\rightarrow$ Storage & Supply
  2. Turbid surface water $\rightarrow$ Disinfection $\rightarrow$ Flocculation $\rightarrow$ Sedimentation $\rightarrow$ Filtration $\rightarrow$ Coagulation $\rightarrow$ Storage & Supply
  3. Turbid surface water $\rightarrow$ Filtration $\rightarrow$ Sedimentation $\rightarrow$ Disinfection $\rightarrow$ Flocculation $\rightarrow$ Coagulation $\rightarrow$ Storage & Supply
  4. Turbid surface water $\rightarrow$ Sedimentation $\rightarrow$ Flocculation $\rightarrow$ Coagulation $\rightarrow$ Disinfection $\rightarrow$  Filtration $\rightarrow$ Storage & Supply
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