Anaerobic Digestion 2 : A unit process designed to biologically convert organic matter (sludge) through the action of microorganisms in the absence of elemental oxygen
NFPA 820 Standard for Fire Protection in Wastewater Treatment and Collection Facilities, 2008 ed. http://www.nfpa.org/codes-and-standards/document-i nformation-pages?mode=code&code=820, (Std: Fr Prac in Wastewater Treatment and Collection Fcilty - Amer) {351 NFC}