Many people ask how to use a FujiMAC air pump to aerate a septic tank.
A septic tank is not designed for aeration. It functions as more of a settling tank, and allows the wastewater exiting a home to passively settle out. The solids fall to the bottom, and the grease, oil and fat from the kitchen and other sources rise to the top. The tank is constructed in such a way as to keep these wastewater components in the tank, and the clarified wastewater, or effluent passes out to the drain field for disposal. A pumper truck can then remove the accumulations in the tank when required.
When air is introduced into wastewater, the natural aerobic bacteria present in our bodies can propagate and consume a lot of the solids. You have the tank pumped less often, and a much cleaner effluent is directed to the drain field. This can mean longer drain field life, and less potential for polluting nearby water sources and aquifers.
My caution is that when air is introduced to a septic tank, the result is a lot of agitation, and the previously separated grease, fat, oil and solids in the tank are completely mixed and can be washed out to the septic field which quickly plugs solid and fails. This is something that is not often pointed out by companies selling septic tank aeration systems, and since these products are often purchased by people with failing systems to begin with, it is next to impossible to attribute the failure to the new aeration product.
Some septic aeration systems can be beneficial, but they must be correctly designed and installed, and it is important to do some research and ask questions before proceeding. There are good reasons that commercial aerobic wastewater treatment systems are expensive. They include a specially designed tank, and undergo an extensive development and testing program prior to being commercially available. Most commercial systems also have certification from a third party such as NSF, or Gulf Coast Testing.