Interconnecting biomethane supply
PG&E is committed to renewable biomethane
We were the first energy company in California and the third in the nation to accept dairy derived renewable biomethane into our pipeline system. We promote the use of biomethane, whether for injection into the pipeline system, for use in power generation or for fueling vehicles. We are committed to interconnecting biomethane projects in a way that is both safe and supports the state's climate goals.
What is biomethane?
Biomethane is a 100% renewable energy source which is produced from organic matter like agricultural crops, forestry waste, wooden construction waste, and manure. Major sources of biomethane are non-hazardous landfills, dairies, wastewater treatment plants and other organic sources.
Why biomethane is important
Reduces greenhouse gases
Methane that would have escaped into the atmosphere is captured, then used in place of greenhouse-gas emitting fuels.
24/7 green energy source
Other clean energy sources depend on fluctuating factors like sunshine and wind. Renewable natural gas can be used at any time.
Promotes the development of clean-sourced energy
Developing a renewable energy source that can take over many of the roles of traditional fossil fuels.
Helps meet the California Renewables Portfolio Standard
The ambitious goal is to reduce greenhouse gas emissions by 40% below 1990 levels by 2030, and 80% below 1990 levels by 2050.
How a biomethane system works
Biodigester - Breaks down waste products like manure or leftover food. This produces biogas, which is a mixture of methane and other elements. The biogester then feeds a gas engine or biogas upgrading unit.
Gas engine - Incinerates the biogas, which produces the energy to drive a shaft. The gas engine also powers a generator.
Biogas upgrading unit - Removes moisture, carbon dioxide and other constituents of concern from the biogas, yielding biomethane.
Generator - Uses the spinning shaft to create electricity, which can be used locally or transferred to the power grid.
Biomethane fueling station - Provides biomethane for onsite vehicles such as garbage trucks and delivery fleet or equipment.
Pipeline connection - Transfers biomethane from the production facility to homes and businesses statewide.
How biomethane can be used
Biomethane can be used in a variety of different ways. That’s one of the reasons it makes sense for Californians to work together to bring this renewable energy source online.
Part of the natural gas supply
Biomethane is interchangeable with natural gas and can enter the natural gas pipeline system where it will be used to create heat in homes, offices and factories across California.
Biomethane can be used in compressed natural gas or liquefied natural gas vehicles. Biomethane used in near-zero emission, heavy-duty trucks can deliver some of the best greenhouse gas emission reductions for our state.
Biomethane can be used to create electricity through reciprocating engines, turbines or fuel cells. This makes it a very clean source of energy for our state.
If you’re interested in learning more about the program, contact us at firstname.lastname@example.org.
Interconnecting with PG&E
Gas supply absorption capacity map
Have a gas supply project location? Use our Gas Supply Absorption Capacity map to get a relative idea of PG&E’s ability to accept your gas supply. The system is constantly changing so use the map only as a cursory tool. We encourage you to contact us with your project information so we can start an Initial Feasibility Study.
Use the gas supply absorption capacity map
Steps to interconnecting with PG&E
Interconnection Screening Study
First, provide some information about your project, including your supply source, location and volume. After our analysis, we’ll let you know about the nearest pipeline location that can accept your supply.
Allow: Up to 15 business days
Cost: No cost
Preliminary Engineering Study
We’ll send a project team with engineers and project planners to your site. The team will review the most efficient and safest route to make the pipeline connection, and then develop a preliminary cost estimate for the interconnection.
Allow: Up to 90 business days
Detailed Engineering Study and Construction
This is the engineering and construction phase. We’ll finalize the project design and provide more detailed estimates. Then construction will begin.
Allow: Up to 180 business days for DES
*Project costs will vary depending on project scope, the season in which construction occurs, and on details associated with the project location (e.g., environmentally sensitive areas, railroad or major road or highway crossings, etc.).
Factors to consider for interconnection
Location of your biomethane plant
Long distances can increase costs and permitting requirements.
How much pipeline capacity is available nearby
We need sufficient room in the pipeline to receive the biomethane you may be producing.
Pipeline pressure at the site of the injection
The gas you’re supplying will need to be at least equal to the pressure of the pipeline. Injecting biomethane must be done safely and within acceptable pressure ranges.
Customer demand for gas near your connection
There must be adequate and stable gas demand on the pipeline to accept the biomethane supply from your plant.
Frequently asked questions
R&D Renewable Natural Gas (RNG) roadmap
PG&E R&D RNG Value Chain 2018
The Renewable Natural Gas (RNG) Value Chain document is a framework that takes a holistic view of the RNG process by highlighting the key segments from raw materials to end use in a simple visual medium. The document is meant to convey the entire RNG picture.
Download PG&E RNG Value Chain (PDF, 487 KB)
PG&E R&D RNG Roadmap 2022
Encompassing the key segments covered in the RNG Value Chain, the RNG Roadmap lays out PG&E’s plan in the RNG and clean fuels space over the next 10-15 years. It also highlights the focus areas where PG&E sees opportunities, as well as initiatives for each focus area.
Download PG&E RNG Roadmap 2022 (PDF, 1.73 MB)
PG&E R&D RNG Whitepapers
The PG&E Gas R&D and Innovation team has developed seven whitepapers covering the steps highlighted in the RNG Value Chain, including Biomass, Biochar, Conversion, Upgrading, RNG Demand, Alternative Carbon Markets and Hydrogen. Each whitepaper provides a general overview of these topics, as well as a description of the current state of technology.
Download the following:Whitepaper: Alternative Carbon Markets 9/19/2018 (PDF, 1.1 MB)
Whitepaper: Biochar Analysis 6/15/2018 (PDF, 385 KB)
Whitepaper: Biogas Upgrading 10/19/2018 (PDF, 925 KB)
Whitepaper: Biomass 9/18/2018 (PDF, 1.3 MB)
Whitepaper: Conversion 8/30/2018 (PDF, 1.0 KB)
Whitepaper: Pipeline Hydrogen 9/18/2018 (PDF, 1.8 MB)
Whitepaper: Renewable Natural Gas Demand 8/30/2018 (PDF, 1.1 MB)
PG&E R&D RNG Technical Analyses
The PG&E Gas R&D and Innovation team has developed thirteen Technical Analyses that take a deeper dive at covering individual technologies that are mentioned in the RNG whitepapers. Topics include anaerobic digestion, gasification, methanation, water scrubbing, fuel cells and more.
Download the following:Anaerobic Digestion Technical Analysis 5/15/2018 (PDF, 689 KB)
Captured Carbon Uses Technical Analysis 7/27/2018 (PDF, 227 KB)
Carbon Capture Technical Analysis 7/27/2018 (PDF, 863 KB)
Cryogenic Separation Technical Analysis 7/27/2018 (PDF, 2.3 MB)
Fuel Cells Technical Analysis 8/2/2018 (PDF, 710 KB)
Gasification Technical Analysis 5/1/2018 (PDF, 1.2 MB)
Hydrogen Technical Analysis 7/3/2018 (PDF, 2.4 MB)
Membrane Separation Technical Analysis 6/15/2018 (PDF, 1.4 MB)
Methanation Technical Analysis 6/19/2018 (PDF, 561 KB)
Pressure Swing Adsorption Technical Analysis 7/2/2018 (PDF, 608 KB)
Pyrolysis Technical Analysis 5/14/2018 (PDF, 1.2 MB)
LNG/CNG Transportation Technical Analysis 7/12/2018 (PDF, 724 KB)
Water Chemical Scrubbing Technical Analysis 7/2/2018 (PDF, 524 KB)