title: Enhanced methane recovery by food waste leachate injection into a landfill in Korea.
abstract: The current food waste leachate (FWL) disposal practice in Korea warrants urgent attention and necessary action to develop an innovative and sustainable disposal strategy, which is both environmentally friendly and economically beneficial. In this study, methane production by FWL injection into a municipal solid waste landfill with landfill gas (LFG) recovery facility was evaluated for a period of more than 4 months. With the target of recovering LFG with methane content ~50%, optimum LFG extraction rate was decided by a trial and error approach during the field investigation in five different phases. The results showed that, upon FWL injection, LFG extraction rate of ~20 m(3)/h was reasonable to recover LFG with methane content ~58%. Considering the estimated methane production potential of 31.7 m(3) CH(4) per ton of FWL, methane recovery from the landfill was enhanced by 14%. The scientific findings of this short-term investigation indicates that FWL can be injected into the existing sanitary landfills to tackle the present issue and such landfills with efficient liner and gas collection facility can be utilized as absolute and sustainable environmental infrastructures.
authors.affiliation: Center for Clean Technology and Resource Recycling, University of Ulsan, Ulsan, South Korea.
authors.forename: Shishir Kumar
authors.initials: SK
authors.lastname: Behera
authors.forename: Dong-Hoon
authors.initials: DH
authors.lastname: Kim
authors.forename: Hang-Sik
authors.initials: HS
authors.lastname: Shin
authors.forename: Si-Kyung
authors.initials: SK
authors.lastname: Cho
authors.forename: Seok-Pyo
authors.initials: SP
authors.lastname: Yoon
authors.forename: Hung-Suck
authors.initials: HS
authors.lastname: Park
mesh_terms: D056804:Biofuels; D005735:Garbage; D008697:Methane / Q000302:isolation & purification*; D056910:Republic of Korea; D014874:Water Pollutants, Chemical / Q000737:chemistry
chemical_list: D056804:Biofuels; D014874:Water Pollutants, Chemical; D008697:Methane