What is the purpose of using granular activated carbon after ozone treatment, as described?

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Multiple Choice

What is the purpose of using granular activated carbon after ozone treatment, as described?

Explanation:
After ozonation, some organic compounds become more biodegradable and can serve as nutrients for bacteria in the distribution system. Granular activated carbon adsorbs these oxidized organics (and any remaining ozone), reducing the assimilable organic carbon that bacteria would use to grow. By lowering these nutrients, carbon filtration helps prevent microbial regrowth in the piping network and supports disinfection stability. While GAC can also help with tastes, odors, and color, the described purpose in this context is limiting bacterial regrowth. It doesn’t directly target nitrification.

After ozonation, some organic compounds become more biodegradable and can serve as nutrients for bacteria in the distribution system. Granular activated carbon adsorbs these oxidized organics (and any remaining ozone), reducing the assimilable organic carbon that bacteria would use to grow. By lowering these nutrients, carbon filtration helps prevent microbial regrowth in the piping network and supports disinfection stability. While GAC can also help with tastes, odors, and color, the described purpose in this context is limiting bacterial regrowth. It doesn’t directly target nitrification.

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