Increased anaerobic production of methane by co-digestion of sludge with microalgal biomass and food waste leachate.
The co-digestion of multiple substrates is a promising method to increase methane production during anaerobic digestion. However, limited reliable data are available on the anaerobic co-digestion of food waste leachate with microalgal biomass. This report evaluated methane production by the anaerobic co-digestion of different mixtures of food waste leachate, algal biomass, and raw sludge. Co-digestion of substrate mixture containing equal amounts of three substrates had higher methane production than anaerobic digestion of individual substrates. This was possibly due to a proliferation of methanogens over the entire digestion period induced by multistage digestion of different substrates with different degrees of degradability. Thus, the co-digestion of food waste, microalgal biomass, and raw sludge appears to be a feasible and efficient method for energy conversion from waste resources.
Future Environmental Research Center, Korea Institute of Toxicology (KIT), 17 Jeigok-gil, Munsan-eup, Jinju, Gyeongsangnam-do 660-844, Republic of Korea; Human and Environmental Toxicology Program, Korea University of Science and Technology (UST), Daejeon 305-350, Republic of Korea.
Jungmin
J
Kim
Future Environmental Research Center, Korea Institute of Toxicology (KIT), 17 Jeigok-gil, Munsan-eup, Jinju, Gyeongsangnam-do 660-844, Republic of Korea; Department of Environmental Engineering, Chodang University, 380 Muan-ro, Muan-up, Muan-gun, Jeollanamdo 534-701, Republic of Korea. Electronic address: cmkang@kitox.re.kr.
Chang-Min
CM
Kang
D000693:Anaerobiosis; D018533:Biomass; D005502:Food; D008697:Methane / Q000096:biosynthesis*; D058086:Microalgae / Q000378:metabolism*; D012037:Refuse Disposal / Q000379:methods*; D012722:Sewage / Q000382:microbiology*; D014866:Waste Products / Q000032:analysis*
D012722:Sewage; D014866:Waste Products; D008697:Methane
Algal biomass; Anaerobic co-digestion; Food waste leachate; Methane; Raw sludge