Last reviewed on 10-02-2020

Documentation of California's Greenhouse Gas Inventory (13th Edition - Last updated on 10-15-2020)

♦ Category: Waste

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

♦ Activity: Production processed - Non-citrus fruit

♦ Greenhouse gas: Methane ( CH4 )

► Year 2011 —

● Greenhouse gas emission estimate —

Amount: 1,328 tonnes of CH4 Emitted (33,198 tonnes CO2 Eq.)
Basis: Calculation
Calculation: [Production Processed] * [Wastewater outflow rate] * [Chemical oxygen demand (COD)] * [Proportion of COD treated anaerobically] * [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: Production processed = 5,921,431 tonne of Non-citrus fruit
Basis: Data
Reference: USDA (2016). U.S. Department of Agriculture, National Agricultural Statistics Service, Quick Stats. Accessed online at: #http://quickstats.nass.usda.gov/

● Parameters and Constants used in calculations —

Parameter: Chemical oxygen demand (COD) = 1.81 g / l
Reference: ARB (2016). Technical support document on GHG inventory methodologies for the 2000-2014 inventory. See Discussion of emissions from wastewater treatment available at: https://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
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 = 0.8
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: Proportion of COD treated anaerobically = 0.05
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: Wastewater outflow rate = 12,417 l / tonne
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: 224 g of CH4 per tonne of Non-citrus fruit
5,606 g (i.e. 5.61 kg) of CO2eq. per tonne of Non-citrus fruit