WAnaerobic digestion
WAnaerobic Digestion and Biogas Association
WBiochemical oxygen demand
WBioconversion of biomass to mixed alcohol fuels
WBiodegradation
WBiofuel
WBiogas
WBiohydrogen
WCoenzyme-B sulfoethylthiotransferase
WDecomposition
WDigestate
WEnergy crop
WFermentation
WLandfill gas
WLeachate
WMethane
WMixed acid fermentation
W3-Nitrooxypropanol
WVasily Leonidovitch Omelianski
WOrganisms involved in water purification
WSewage
WSilage
WThermophile
WWaste stabilization pond