What is the difference between a septic and areobic system?

Question

Any ideas of which is better ? Estimated cost in southwest Ohio?

Answer 1

"Not every site has the space and porous soil needed to support a septic system. A standard anaerobic (septic) system settles out solids but does little else to treat wastewater. Typically, a large drain field is also necessary to distribute wastewater over a wide area to reduce groundwater pollution. Aerobic treatment systems use a mechanism to inject air into a tank, encouraging decomposition that produces a higher quality effluent. In some cases, the size of the drain field can be reduced to allow development of a site that otherwise could not support a conventional septic system."

The aerobic system is better, but more expensive, $3200-$5000.