Biomethane in Medina Sidonia: Enagás connects new station to gas network

Key data

Biomethane producers in Andalusia have had a new entry point to the gas transport network in Medina Sidonia (Cádiz) since May 6, 2026. The Resolution from the Directorate General of Energy Policy and Mines authorizes Enagás Transporte, SAU to modify position K-07 of the Tarifa-Córdoba pipeline and install the G-65 measurement station, specifically designed for biomethane injection.

This infrastructure is not a future project: authorization has been granted and the execution project approved. For those producing biomethane from organic waste in the area, the path to the national network has been significantly shortened.

What does this regulation establish?

The resolution grants two simultaneous authorizations to Enagás Transporte, SAU:

• Administrative authorization to execute the project installations.
• Approval of the execution project for the works and installations.

The project consists of modifying position K-07 of the Tarifa-Córdoba pipeline, incorporating the G-65 measurement station. This station is designed exclusively for biomethane injection into the transport network, that is, to receive renewable gas produced externally and introduce it into the national gas system.

The biomethane to be injected comes from the transformation of organic waste, which frames this infrastructure within the national strategy for decarbonizing the gas system and European renewable energy objectives in the gas sector.

Economic and operational impact

The enablement of this injection point has direct consequences on several levels:

For biomethane producers: Having an authorized injection point on the transport network in Medina Sidonia eliminates one of the main barriers to entry in the renewable gas market: the absence of connection infrastructure. Until now, many biomethane projects in Andalusia lacked physical access to the transport network under operational conditions.

For the agro-industrial and waste management sector: Anaerobic digestion plants operating in the province of Cádiz and neighboring areas can now valorize their organic waste by converting it into injectable biomethane, opening an additional revenue stream and improving the economic viability of these projects.

For Enagás: This action reinforces its position as technical manager of the gas system in the energy transition, expanding the capacity to receive renewable gas in its transport network.

Regulatory context: The enablement of biomethane injection points directly responds to European renewable energy objectives in the gas sector. Spain is obligated to increase the proportion of renewable gases in its energy mix, and the creation of injection infrastructure is an essential step to meet those commitments.

Who does it affect?

• Enagás Transporte, SAU: Directly authorized company. Must execute the works to modify position K-07 and install the G-65 station.
• Biomethane producers in Andalusia: Especially those located in the province of Cádiz and areas near the Tarifa-Córdoba pipeline. They have access to a new injection point in the transport network.
• Agro-industrial sector operators: Companies with organic waste treatment plants (manure, sludge, agri-food waste) that can produce biomethane and need an injection point to commercialize it.
• Waste managers: Operators of anaerobic digestion plants seeking to energetically valorize their waste through biomethane production for injection.
• Gas system operators in Andalusia: Companies participating in the gas market who must be aware of new renewable gas entry points to the network.

Practical example

An anaerobic digestion plant located in the La Janda region (Cádiz), which processes livestock and agri-food waste, produces biomethane but until now had no injection point in the nearby transport network. With the enablement of the G-65 station in Medina Sidonia, this plant can begin the process of requesting connection to Enagás Transporte, SAU to inject its production directly into the Tarifa-Córdoba pipeline.

This allows it to stop depending on local supply contracts or truck transport, and access the national biomethane market with all the renewable origin guarantees required by European regulations. The economic viability of the project improves by being able to commercialize biomethane at market price on the transport network.

What should companies do now?

1. Evaluate proximity to the injection point: If you produce biomethane or manage organic waste in the province of Cádiz or areas near the Tarifa-Córdoba pipeline, analyze whether the G-65 station in Medina Sidonia is technically and economically accessible for your installation.
2. Contact Enagás Transporte, SAU: Begin the technical consultation process to learn the connection requirements for the enabled injection point. Enagás, as technical manager of the gas system, is the direct contact for these procedures.
3. Review biomethane quality requirements: Injection into the transport network requires compliance with technical gas quality specifications. Verify that your production meets or can be adapted to those standards.
4. Analyze viability of new projects: If you are evaluating building a biomethane plant in Andalusia, the existence of this injection point improves the economic equation of the project. Incorporate it into your viability analysis.
5. Monitor regulatory evolution: The enablement of biomethane injection points is an expanding process in Spain. Monitor new authorizations that may open additional opportunities in other areas of the country.