What is the typical detention time for the recarbonation process?

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Multiple Choice

What is the typical detention time for the recarbonation process?

Explanation:
Detention time in the recarbonation stage is the period water spends in contact with CO2 so the gas can dissolve and the water’s alkalinity and pH can be properly adjusted. The goal is to achieve enough mixing and equilibrium to restore bicarbonate alkalinity and bring the pH to a neutral range before moving on to filtration or distribution. In practice, this step is designed for about 15 to 30 minutes of contact time. If the time is too short, CO2 won’t fully dissolve, leaving higher pH and lower alkalinity than desired; if it’s too long, you’d be wasting time and resources without meaningful benefit. So 15–30 minutes is the typical detention time for recarbonation.

Detention time in the recarbonation stage is the period water spends in contact with CO2 so the gas can dissolve and the water’s alkalinity and pH can be properly adjusted. The goal is to achieve enough mixing and equilibrium to restore bicarbonate alkalinity and bring the pH to a neutral range before moving on to filtration or distribution. In practice, this step is designed for about 15 to 30 minutes of contact time. If the time is too short, CO2 won’t fully dissolve, leaving higher pH and lower alkalinity than desired; if it’s too long, you’d be wasting time and resources without meaningful benefit. So 15–30 minutes is the typical detention time for recarbonation.

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