I have seen strippers with induced (vacuum) air (e.g. blower on the stack side of the stripper). Why did you choose to have the blower pressurize in the stripper chamber? Any associated engineering or implementation issues?

We like the idea of not having the blower working with 100% saturated air all the time. Some people feel there is an advantage in the process to use vacuum; we've run the mass transfer calculations and the difference is negligible. Another reason to use induced vacuum is the thought that the temperature rise through the blower will change the dew point enough to avoid condensation in vapor phase carbon or other downstream equipment and piping. The pressure fan type blowers we use do not raise the air temperature by a significant amount (as compared to a Roots, or regenerative type blowers), so we feel this factor is also of minimal impact. That said, we can and have provided systems in the induced draft configuration.