Which wastewater solid is least likely to end up on a dedicated land disposal site?

In the context of wastewater treatment and solid disposal, compost is the least likely to end up on a dedicated land disposal site because composting is a process specifically designed for organic waste treatment. Composting transforms organic materials, such as food waste and yard trimmings, into a rich soil amendment that can be returned to the land as a beneficial product. This process not only reduces the volume of waste that would otherwise need disposal but also supports soil health and plant growth when added back into agricultural or landscaped areas.

On the other hand, incinerated material, screenings, and grit are generally considered waste products that require management through disposal methods. Incinerated material can result in ash, which may need to be disposed of in a landfill. Screenings, which are the solid materials removed from wastewater during preliminary treatment, must be disposed of after collection, often in landfills. Grit, composed of sand, gravel, and other heavy solids, also typically requires disposal, often at dedicated sites that can handle its weight and volume. Thus, unlike compost, these materials do not provide a beneficial end-use before heading to a dedicated land disposal site.