In process design for air stripping of trihalomethanes (THMs) the gas‐phase, mass‐transfer resistance must be taken into account to ensure efficient operation. In most cases, it should be possible to attain effective THM control with an energy expenditure of less than 0.1 kW · h/m 3 of treated water. Mechanical surface aeration and countercurrent, packed‐column air stripping require approximately the same amounts of energy to achieve the same treatment efficiency. Considerable energy savings can be realized by choosing a multistage configuration in surface aeration.
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Roberts et al. (1985) studied this question.
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