I personally have never seen this before but anything is possible. I think it would take a bigger blade than what's supplied with the Koenders Mill. Electric Mills need higher RPM than what the air pump needs. Higher quantity blades = lower RPM and higher torque.

Another idea would just have an electric mill to charge some deep cycle batteries that would run a small air pump.

Before my windmill was finished and before electricity I used one of those small 12v compressors to run my diffuser of a car battery. The boil wasn't huge but it did the job for a couple weeks.