Which solids treatment method maximizes the reduction of moisture and solids?

Incineration is a solids treatment method that involves the combustion of organic materials, resulting in a significant reduction of both moisture content and solid mass. Through the high-temperature process of incineration, organic matter is effectively burned away, leading to a reduction in volume and weight of the solids. This method not only minimizes the total mass to be managed but also results in the destruction of pathogens and other harmful components.

In contrast, the other methods listed—composting, centrifuge, and flotation thickening—are primarily aimed at either reducing volume or separating solids but do not achieve the same level of moisture and solids reduction as incineration. Composting allows for the breakdown of organic material but typically retains a considerable amount of moisture. Centrifuges operate by spinning to separate solids from liquids, effectively concentrating solids but not necessarily eliminating moisture completely. Flotation thickening relies on air bubbles to lift solids to the surface for removal but is also focused more on separation than complete moisture reduction.

Thus, incineration is the most effective option for maximizing the reduction of both moisture and solids in comparison to these other treatment methods.