Green Gas
Iberian Ventures
ES / EN
Our model

Our design, our criteria

The complete technical process, the siting criteria and the path towards bankable Ready-to-Build projects.

Our design, our criteria

The process, with full technical rigour

From waste to grid-quality gas, and back to the field. Technical rigour and direct benefit for the AGRO partner.

DIAGRAM 02 · how it works and what you gain

The process, what you contribute and what you receive

Above, the complete technical process with its real figures (compositions, temperatures, qualities). Below, the four concrete benefits for your farm. Rigour and closeness, together.
THE TECHNICAL PROCESS 1 · Feedstock slurries, manure, agri-food residues 2 · Digestion anaerobic, no O₂ 35-40 °C · 20-40 days 3 · Raw biogas ~60% CH₄ / ~40% CO₂ + traces of H₂S, H₂O 4 · Upgrading membranes / PSA / scrubbing · separates CO₂ 5a · Biomethane >90% CH₄ (grid standard) 5b · Bio-CO₂ 95-99% · food grade END USES gas grid mobility industry Digestate (85%) N-P-K fertiliser WHAT YOU RECEIVE · 4 benefits Fertiliser returned local N-P-K organic fertiliser for your land regenerative agriculture Waste solved lower costs and fewer odours regulatory compliance simplified slurry management Income and participation income from your waste equity option (JV) you share in the value Rural roots jobs and population value that stays in your territory returns to you
Technical rigour + direct benefit: above you see exactly how it is produced (with the real figures of the process); below, what your farm gains. The digestate connects the two bands: it is the 85% of the process that returns to you as fertiliser.
Sources: biogas ~60% CH₄/40% CO₂ (IDAE), (FAO); temperature 35-40°C and retention time (Genia Bioenergy); biomethane >90% CH₄ (PD-01/02) (F. Naturgy); bio-CO₂ 95-99% (CSF Méthanisation); digestate 85% (Nutriman).
Facilities that workWe apply the best available techniques and the operating experience of thousands of plants across Europe.
MITECO Seal of Excellence

We design every plant to earn the seal

We design every plant to meet the criteria of the social, territorial and environmental Seal of Excellence introduced by RDL 7/2026 of Spain's Ministry for the Ecological Transition (MITECO). It is not window dressing: it is the guarantee that the project is born well made, with the territory's backing and environmental traceability.

Reference: RDL 7/2026, art. 26 (MITECO).

Siting criteria

  • Sized to local, nearby by-products.
  • Maximum distance from urban centres, odour control.
  • Reception and treatment in enclosed spaces.
  • Management agreements with local producers.
Mass balance

85% returns to the field

Of every tonne of by-product, most goes back to your land as organic fertiliser. Only 15% becomes gas.

DIAGRAM 03

Mass balance · Sankey (illustrative reference plant)

How the matter is transformed: from 120,000 t/year of by-products to organic fertiliser and renewable gas. Illustrative values for a reference plant.
By-products 120,000 t/year Digestion Biogas → biomethane+CO₂ 18,000 t (15%) Digestate → fertiliser to the field 102,000 t (85%)
85% of the matter returns to the field as organic fertiliser (digestate), closing the nutrient cycle. Only 15% becomes gas.
Sources: 15% gas / 85% digestate split (Nutriman). Absolute figures: illustrative reference plant (~50 GWh/year) based on the GGiV corporate factsheet; the input tonnage is indicative and varies with the substrate.
Derived product

The organic fertiliser that returns to the field

As a result of the process we obtain an organic NPK fertiliser of animal origin, sourced 100% from animal dejections, manures and effluents collected and treated selectively. It returns to the AGRO partner's land as a natural, local and traceable fertiliser.

70 GWh
Target BioCH₄ production per project (initial horizon)
Viability

The pillars that make each project bankable

We secure the essential factors before committing investment.

Resources and land

Sufficient, nearby organic resources and suitable land for the plant.

Partners and fertilisers

Committed AGRO partners and a plan for managing the digestate as fertiliser.

Licences

Social, environmental and construction licences for the project.

Connections

Connection to the electricity grid, the gas grid and other necessary services.

Feedstock

Long-term security of feedstock supply through stable agreements.

Valorisation

A valorisation model for the biomethane and its by-products (bio-CO₂, fertiliser).

Project management areas (with reference partners): land, feedstock, digestate, permits, social acceptance, financing and biogas valorisation. Source: GGiV corporate presentation, 2026.

Work plan

Project phases towards Ready-to-Build

1 · Origination and Social Legitimacy

Territorial diagnosis and prior dialogue with producers and authorities.

2 · Securing the project pillars

Land, supply, valorisation, connections and permitting with realistic timelines.

3 · Engineering and circular design

Sized to the territorial reality and to the availability and characteristics of the organic by-products.

4 · End-to-end development management

Communication, social plan, local integration.

5 · Optional O&M management over the medium or long term.

Technical and industrial rigourFacilities designed to the highest environmental and safety standards, applying the best available techniques.