How does composting work in alternative septic systems?

Composting in alternative septic systems operates by utilizing microorganisms to break down organic matter and waste into compost material. This process mimics natural decomposition, where bacteria, fungi, and other microorganisms convert waste into nutrient-rich compost. In the context of septic systems, this not only helps mitigate waste but also reduces the volume that must be managed. The end product, compost, can be used to enrich soil, promote plant growth, or manage waste more sustainably.

The other options do not accurately describe the role of composting in these systems. Filtering solids is a different function that typically occurs before waste enters the septic tank, while separating greywater from blackwater involves different treatment principles. Aerating tank liquids is related to increasing oxygen levels for aerobic microorganisms, which is part of some treatment strategies but not specifically about composting itself.