Biomethane in Calatorao: what it means for gas producers and consumers

Key data

Biomethane producers in Calatorao and surrounding areas have had a concrete pathway since May 25, 2026 to connect their production to the gas transport network. The Resolution of May 8, 2026 from the General Directorate of Energy Policy and Mines grants Redexis Infraestructuras, SL administrative authorization and approval of the execution project to enable a new injection point on the Zaragoza-Calatayud gas pipeline intended exclusively for biomethane injection.

This is not a minor infrastructure change: it is the formal opening of a renewable gas entry point in an already operational transport network, with all the technical, contractual, and business implications that entails.

What does this regulation establish?

The resolution grants two things simultaneously to Redexis Infraestructuras, SL:

• Administrative authorization to execute the project.
• Approval of the execution project for the new injection point on the Zaragoza-Calatayud gas pipeline.

The new injection point is located in Calatorao (Zaragoza) and has the sole purpose of biomethane injection into the existing gas transport network. Redexis is obligated to execute the works in accordance with the approved project and to comply with all technical and safety conditions established in the resolution.

Biomethane is renewable gas produced mainly from organic waste, manure, sludge, or energy crops. Once injected into the network, it is indistinguishable from conventional natural gas and can be consumed by any user connected to that network.

Economic and operational impact

This authorization has three direct economic and operational effects worth separating:

For Redexis Infraestructuras, SL: The company assumes the obligation to execute the construction works for the new injection point in accordance with the approved project. This implies infrastructure investment and responsibility for compliance with technical and safety standards set in the resolution. No investment figures have been published in the regulation.

For local biomethane producers: The enablement of this injection point is a direct business opportunity. Until now, without an authorized connection point on the nearby transport network, the commercialization of biomethane produced in the area was limited. With this infrastructure, producers can negotiate injection contracts with Redexis and access the renewable gas market.

For industrial gas consumers in the area: The availability of biomethane in the network expands supply options with renewable-source gas, which can be relevant for companies with decarbonization commitments or that need to demonstrate the use of renewable energy in their production processes.

Who does it affect?

• Redexis Infraestructuras, SL: Company directly authorized and obligated to execute the works and comply with the technical and safety conditions of the approved project.
• Biomethane producers in Calatorao and surrounding area: Companies or facilities that produce biomethane from organic waste, manure, sludge, or biomass in the Calatorao (Zaragoza) area and that can connect to the new enabled injection point.
• Industrial gas consumers in the area: Industries and companies in Calatorao and municipalities connected to the Zaragoza-Calatayud gas pipeline that consume gas and want access to renewable-source supply.
• Energy sector: Operators and gas traders interested in the integration of renewable gases in the Spanish transport network.

Practical example

A porcine manure treatment plant located in the Calatorao area produces biomethane as a byproduct of its anaerobic digestion process. Until now, without an authorized injection point on the nearby transport network, that company had two options: consume the biomethane internally or sell it in compressed format (vehicle biomethane), with the logistics costs that implies.

With the new injection point enabled by Redexis on the Zaragoza-Calatayud gas pipeline, that plant can now negotiate directly with Redexis an injection contract, introduce its production into the transport network, and commercialize it as renewable gas to any consumer connected to the network, with the backing of corresponding origin guarantees. This significantly expands its potential market and improves project profitability.

What should companies do now?

1. Biomethane producers in the area: Contact Redexis Infraestructuras, SL to learn about the technical and contractual requirements for access to the new injection point in Calatorao. Authorization is already granted; the next step is negotiating connection conditions.
2. Gas-consuming companies in the Zaragoza-Calatayud gas pipeline area: Review with your gas supplier the possibility of contracting certified biomethane supply once the infrastructure is operational. This can be relevant for meeting decarbonization objectives or demonstrating renewable energy use.
3. Redexis Infraestructuras, SL: Execute the works in accordance with the approved execution project and comply with all technical and safety conditions established in the resolution of May 8, 2026.
4. Energy advisors and sustainability consultants: Inform your industrial clients in the area about the upcoming availability of biomethane in the network as a renewable supply option, especially if they have ESG commitments or renewable energy accreditation needs.