Understanding ATUs

Aerobic treatment units work on the same basic principles as municipal wastewater treatment plants. They require special knowledge and good maintenance.
Understanding ATUs
Cross-section diagram of a typical single-compartment septic tank. (Photos courtesy of Kit Rosefield)

In September Onsite Installer, we discussed media filters as one advanced treatment option to deal with site and soil limitations. Now we will expand that topic to include the many configurations of aerobic treatment units (ATUs).

Before we get into the types of units, we need...

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