Last reviewed on 12-01-2023
Documentation of California's Greenhouse Gas Inventory
(2023 Edition - Last updated on 12-1-2023)
♦ Category: Waste
IPCC: |
4B - Biological Treatment of Solid Waste |
Sector: |
Industrial : Solid Waste Treatment : Composting |
♦ Activity: Feedstock processed -
♦ Greenhouse gas: Methane ( CH4 )
► Year 2012 —
● Greenhouse gas emission estimate —
Amount: |
7,883 tonnes of CH4 Emitted (197,066 tonnes CO2 Eq.) |
Basis: |
Calculation |
Calculation: |
[Feedstock Processed]*[Composting CH4 emission factor]*[Short ton to kilogram conversion] |
Reference: |
IPCC (2006). 2006 IPCC Guidelines for National Greenhouse Gas Inventories, Eggleston H.S., Buendia L., Miwa K., Ngara T., and Tanabe K. (eds). Vol.5, Chap. 4: Biological Treatment of Solid Waste. Published: IGES, Japan. Accessed online at: http://www.ipcc-nggip.iges.or.jp/public/2006gl/pdf/5_Volume5/V5_4_Ch4_Bio_Treat.pdf |
● Activity level used in calculations —
● Parameters and Constants used in calculations —
Parameter: |
Composting CH4 emission factor = 1.96 g / kg |
Reference: |
CARB (2017). Method for estimating greenhouse gas emission reductions from diversion of organic waste from landfills to compost facilities. California Air Resources Board. Available online at: https://ww2.arb.ca.gov/sites/default/files/classic/cc/waste/cerffinal.pdf |
Constant: |
Short ton to kilogram conversion = 907.1847 kg / ton |
Reference: |
NIST (2008). Guide for the Use of the International System of Units (SI). Ambler Thompson & Barry N. Taylor (Ed.). NIST Special Publication 811, 2008 edition. National Institute of Standards and Technology, Gaithersburg, MD. http://physics.nist.gov/cuu/pdf/sp811.pdf |
Constant: |
Global warming potential of CH4 = 25 |
Reference: |
IPCC (2007). Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. Solomon S., Qin D., Manning M., Chen Z., Marquis M., Averyt K.B., Tignor M., and Miller H.L. (eds.). http://www.ipcc.ch/publications_and_data/publications_ipcc_fourth_assessment_report_synthesis_report.htm |
● Greenhouse gas emitted per unit activity (derived from values listed above) —
Amount: |
1,778 g (i.e. 1.78 kg) of CH4 per ton 44,452 g (i.e. 44.45 kg) of CO2eq. per ton |