Anaerobic digestion of food waste: comparing leachate exchange rates in sequential batch systems digesting food waste and biosolids.

摘要: Abstract Over 35,000 tonnes of food waste are generated from high concentration point sources (i.e., restaurants, hospitals and markets) in metropolitan Adelaide (Australia) each year. Anaerobic digestion is a preferred method treatment to degrade highly putrescible streams such as due its methane potential. To maximise yield, sequential batch anaerobic system was chosen the most appropriate system. Two sets systems consisting mature start-up reactors triplicate exchanged leachate. One set twice much leachate by volume other determine effects different exchange volumes. Results show that increasing between reactors, time feedstock decreases, but total generation yields did not markedly differ, being 229 L CH 4  kg −1 VS added 214 L CH . Process parameters used when cease were pH 6.5 rate >0.5 L CH day Changes carbon dioxide biogas composition reflected process stress caused addition with VFA concentrations indicate there may be limits rates subsequent loading reactors.