title: Determination of greenhouse gas emission reductions from sewage sludge anaerobic digestion in China.
abstract: Sewage sludge is a considerable source of greenhouse gas (GHG) emission in the field of organic solid waste treatment and disposal. In this case study, total GHG emissions from sludge anaerobic digestion, including direct and indirect emissions as well as replaceable emission reduction due to biogas being reused instead of natural gas, were quantified respectively. The results indicated that no GHG generation needed to be considered during the anaerobic digestion process. Indirect emissions were mainly from electricity and fossil fuel consumption on-site and sludge transportation. Overall, the total GHG emission owing to relative subtraction from anaerobic digestion rather than landfill, and replaceable GHG reduction caused by reuse of its product of biogas, were quantified to be 0.7214 (northern China) or 0.7384 (southern China) MgCO2 MgWS(-1) (wet sludge).
authors.affiliation: Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China E-mail: liuht@igsnrr.ac.cn.
authors.forename: H-T
authors.initials: HT
authors.lastname: Liu
authors.affiliation: Center of Science and Technology of Construction, Ministry of Housing and Urban-Rural Development of China, Beijing 100835, China.
authors.forename: X-J
authors.initials: XJ
authors.lastname: Kong
authors.affiliation: Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China E-mail: liuht@igsnrr.ac.cn.
authors.forename: G-D
authors.initials: GD
authors.lastname: Zheng
authors.affiliation: Beijing Municipal Research Institute of Environmental Protection, Beijing 100037, China.
authors.forename: C-C
authors.initials: CC
authors.lastname: Chen
mesh_terms: D000693:Anaerobiosis; D056804:Biofuels; D019149:Bioreactors; D002681:China; D004560:Electricity; D005579:Fossil Fuels; D005740:Gases / Q000032:analysis*; D017752:Greenhouse Effect; D012722:Sewage; D064091:Waste Disposal Facilities; D018505:Waste Management
chemical_list: D056804:Biofuels; D005579:Fossil Fuels; D005740:Gases; D012722:Sewage