One of the Advantages of Treating Sewage Effluent with Ozone

question 73

Multiple Choice

One of the advantages of treating sewage effluent with ozone as opposed to chlorine is

• A) O₃ is more effective in killing viruses.
• B) O₃ is more effective in killing bacteria.
• C) O₃ provides a residual protection against bacteria.
• D) O₃ is less expensive.

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