Biosolids, or sewage sludge, are the solid byproducts of the wastewater ... of the process are put through thickening centrifuges, then go into these tanks for anaerobic digestion, where microbes ...

Biosolids, or sewage sludge, are the solid byproducts ... then go into these tanks for anaerobic digestion, where microbes continue breaking down organic matter. The tanks are heated to a ...