How to attain desired air quality in aeration tanks?

Recently, I came across a problem of irregular air supply in an aeration tank. Since one of the blowers is out of service, to maintain regular air supply, we connected a compressed air line to the aeration tank. I feel that, compressed air is not giving satisfactory results compared to the blowers, but am not able to find any literature on the topic. Is the use of "blower" or "Industrial Compressed Air System" appropriate for aeration systems, and how can it be adjusted ? Can compressed air in fact replace blower systems in the short and the long term?