What is the primary component of the treater's solid waste after anaerobic digestion?

The primary component of the treater's solid waste after anaerobic digestion is digestate. During the anaerobic digestion process, organic matter is broken down by microorganisms in an oxygen-free environment, resulting in the production of digestate. This digestate predominantly consists of partially decomposed organic material, nutrients, and microbial biomass.

Digestate can be a valuable by-product as it often contains nutrients like nitrogen, phosphorus, and potassium, making it suitable for use as fertilizer in agricultural practices after proper treatment. It represents the concentrated form of the waste that has undergone biological treatment, distinguishing it from other potential by-products that may arise in wastewater treatment processes, such as sludge, which typically refers to the residual solids that settle in sedimentation tanks and may require different treatment or disposal methods.

The other options, while related to wastewater treatment or solid waste management, do not accurately represent the main outcome of anaerobic digestion. For instance, sludge is more commonly associated with conventional aerobic treatment processes and does not reflect the specific product of anaerobic digestion, while fabricated components and oils are not direct outputs of the anaerobic treatment process itself.