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Greenhouse gas emissions from two-stage landfilling of municipal solid waste
Abstract Simulations were conducted to investigate greenhouse gas emissions from aerobic pretreatment and subsequent landfilling. The flows in carbon balance, such as gas, leachate, and solid phases, were considered in the simulations. The total amount of CO2 eq. decreased as organic removal efficiency (ORE) increased. At ORE values of 0, 0.30, 0.41, and 0.54, the total amounts of CO2 eq. were 2614, 2326, 2075, and 1572 kg CO2 eq. per one ton dry matter, respectively; gas accounted for the main contribution to the total amount. The reduction in CO2 eq. from leachate was the primary positive contribution, accounting for 356%, 174%, and 100% of total reduction at ORE values of 0.30, 0.41, and 0.54, respectively. The CO2 eq. from energy consumption was the negative contribution to total reduction, but this contribution is considerably lower than that from gas. Aerobic pretreatment shortened the lag time of biogas production by 74.1–97.0%, and facilitated the transfer of organic carbon in solid waste from uncontrolled biogas and highly polluting leachate to aerobically generated CO2.
Highlights ► Carbon balance in aerobic pretreatment and subsequent landfilling was investigated. ► CO2 eq. from gas was the main contribution to total CO2 eq. emission. ► The total amount of CO2 eq. decreased with increasing aerobic pretreatment level. ► Reduction from leachate contributed primarily to total CO2 eq. reduction. ► Aerobic pretreatment decreased the lag time of biogas production by 74.1–97.0%.
Greenhouse gas emissions from two-stage landfilling of municipal solid waste
Abstract Simulations were conducted to investigate greenhouse gas emissions from aerobic pretreatment and subsequent landfilling. The flows in carbon balance, such as gas, leachate, and solid phases, were considered in the simulations. The total amount of CO2 eq. decreased as organic removal efficiency (ORE) increased. At ORE values of 0, 0.30, 0.41, and 0.54, the total amounts of CO2 eq. were 2614, 2326, 2075, and 1572 kg CO2 eq. per one ton dry matter, respectively; gas accounted for the main contribution to the total amount. The reduction in CO2 eq. from leachate was the primary positive contribution, accounting for 356%, 174%, and 100% of total reduction at ORE values of 0.30, 0.41, and 0.54, respectively. The CO2 eq. from energy consumption was the negative contribution to total reduction, but this contribution is considerably lower than that from gas. Aerobic pretreatment shortened the lag time of biogas production by 74.1–97.0%, and facilitated the transfer of organic carbon in solid waste from uncontrolled biogas and highly polluting leachate to aerobically generated CO2.
Highlights ► Carbon balance in aerobic pretreatment and subsequent landfilling was investigated. ► CO2 eq. from gas was the main contribution to total CO2 eq. emission. ► The total amount of CO2 eq. decreased with increasing aerobic pretreatment level. ► Reduction from leachate contributed primarily to total CO2 eq. reduction. ► Aerobic pretreatment decreased the lag time of biogas production by 74.1–97.0%.
Greenhouse gas emissions from two-stage landfilling of municipal solid waste
Zhang, Yuanyuan (author) / Yue, Dongbei (author) / Nie, Yongfeng (author)
Atmospheric Environment ; 55 ; 139-143
2012-03-19
5 pages
Article (Journal)
Electronic Resource
English
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