Cal State Document
Biosolids are municipal sewage treated to meet federal and state standards required for land application. This paper describes the production and management of biosolids in California; the regulatory framework that controls the use and disposal of biosolids; and, the controversy surrounding their use as a soil amendment and alternatives to the current management practices for biosolids with emphasis on their potential use as a source of energy.
California Research Bureau, "A Brief on Biosolids: Options for Biosolids Management" (2007). California Agencies. Paper 308.