All wastewater facilities are going to generate solids, and dealing with solids is a necessary evil. The processing, treatment and disposal of sludge for beneficial use accounts for approximately 40 to 60% of total wastewater treatment plant expenditures. Depending on economic factors, site conditions, regulatory requirements, stabilization goals and solids disposal options, there are many solids-handling technologies wastewater treatment plants can consider before determining the appropriate solution for a wastewater treatment facility.