Biosolids The Plumeria > Biosolids Posted on September 13, 2016November 10, 2022 by PlumeriaDB ALL0-9ABCDEFGHIJKLMNOPQRSTUVWXYZ Share This Tweet Share A by-product of wastewater treatment sometimes used as a fertilizer, also known as municipal sewage sludge. Related Articles: Manure and Compost as Nutrient Sources