Last reviewed on 06-22-2018

Documentation of California's Greenhouse Gas Inventory (11th Edition - Last updated on 11-06-2019)

♦ Category: Waste

IPCC: 4D2 - Wastewater Treatment and Discharge - Industrial Wastewater Treatment and Discharge
Sector: Industrial : Wastewater Treatment : Industrial Wastewater

♦ Activity: Wastewater flow - Petroleum Refining

♦ Greenhouse gas: Methane ( CH4 )

► Year 2009 —

● Greenhouse gas emission estimate —

Amount: 2,715 tonnes of CH4 Emitted (67,877 tonnes CO2 Eq.)
Basis: Calculation
Calculation: [Wastewater Flow] * [Chemical oxygen demand (COD)] * [Maximum methane production capacity] * [Methane correction factor for anaerobic systems]
Reference: USEPA (2015). Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2013. U.S. Environmental Protection Agency. Chapter 7: Waste. http://www.epa.gov/climatechange/emissions/usinventoryreport.html

● Activity level used in calculations —

Activity: Wastewater flow = 80,446,270 m3 / year of Petroleum Refining
Basis: Compilation
Reference: ARB (2015). California's 2000-2014 Greenhouse Gas Emission Inventory Methodology Update Document available at: ttps://ww3.arb.ca.gov/cc/inventory/pubs/reports/2000_2014/ghg_inventory_00-14_technical_support_document.pdf#https://ww3.arb.ca.gov/cc/inventory/pubs/reports/2000_2014/ghg_inventory_00-14_technical_support_document.pdf

● Parameters and Constants used in calculations —

Parameter: Chemical oxygen demand (COD) = 450 g / m3
Reference: USEPA (2015). Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2013. U.S. Environmental Protection Agency. Chapter 7: Waste. http://www.epa.gov/climatechange/emissions/usinventoryreport.html
Parameter: Maximum methane production capacity = 0.25 g / g
Reference: USEPA (2015). Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2013. U.S. Environmental Protection Agency. Chapter 7: Waste. http://www.epa.gov/climatechange/emissions/usinventoryreport.html
Parameter: Methane correction factor for anaerobic systems = 0.3
Reference: USEPA (2015). Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2013. U.S. Environmental Protection Agency. Chapter 7: Waste. http://www.epa.gov/climatechange/emissions/usinventoryreport.html
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: 33.8 g of CH4 per m3 / year of Petroleum Refining
844 g of CO2eq. per m3 / year of Petroleum Refining
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