Biogas plants are experiencing significant growth in various autonomous communities in Spain., with large-scale projects both in the pipeline and close to opening. Although they are presented as an efficient solution for organic waste management and renewable energy generation, the installation and expansion of these infrastructures is not without debate and controversy, both technically and socially.
In recent months, projects related to biomethane production have multiplied. from slurry and other waste from livestock farms. This boom is partly due to the sustainability goals set by both the European Union and the Spanish government, which seek a transition toward cleaner energy sources and improved agricultural waste management. However, the expansion of these plants raises both expectations for economic development and concerns about their impact on the environment, especially in nearby rural areas.
Major projects and procedures on the national agenda
Initiatives such as the large biogas plant promoted by the Danish group Copenhagen Infrastructure Partners (CIP) in La Sentiu de Sió (Lleida) stand out., currently awaiting final approval from the Urban Planning Department after receiving environmental approval from the Generalitat (Catalan Government). This complex, designed to manage hundreds of thousands of tons of livestock waste per year, aims to become one of the largest in southern Europe and has the support of more than 300 livestock farmers in the area, who will benefit from more sustainable slurry management.
Similar momentum can be seen elsewhere in the country. In Castile and León, twice as many biogas plant projects were processed during 2024 than the previous year, reaching almost XNUMX in various administrative phases. The provinces of Segovia, Valladolid, and Zamora lead this increase, with several plans already approved and others on public display. The regional administration insists that only those projects that meet all environmental and legal requirements will prosper., showing firmness in the face of irregularities detected in some cases.
Ambitious projects are also underway locally, such as the plant promoted by the Gesalor cooperative in Lorca, which is entering its third phase with a total investment exceeding €37 million and with an annual processing capacity of two million cubic meters of slurry. This type of project not only involves waste management but also generates direct and indirect employment in rural areas..
Controversies, social opposition and environmental challenges
The proliferation of biogas plants has brought to light Concerns among neighborhood groups, citizen platforms, and environmental organizationsOne of the main complaints is the proximity of some facilities to inhabited areas, as is the case in La Atalaya (Gran Canaria) or Valverde (La Rioja), where residents and associations have expressed their opposition, citing the risk of unpleasant odors, increased heavy traffic, and potential effects on health and quality of life.
Organizations such as the Asturian Environmental Coordinator warn about the problems associated with the inadequate treatment of liquid waste from digestate and the potential contamination of soil and aquifers. The handling of digestate, the correct management of surpluses and the effective elimination of odors are recurring issues in complaints and requests for improvement.Citizen platforms and some political groups are also demanding greater transparency and access to information related to the projects.
Developers often emphasize that the technology incorporated in new facilities minimizes or prevents odor emissions through closed systems and air treatment circuits, in addition to operating with sealed vehicles for waste transport. However, many communities demand additional safeguards and the location of these plants away from urban centers.
Trends, opportunities and mitigation measures
Biogas and derivatives such as biomethane serve a dual purpose.: Not only do they generate an alternative source of renewable energy, but they also help in the valorization of organic waste from livestock, agricultural and even urban sources, transforming these byproducts into usable material for the production of fertilizers and other industrial purposes.
To reduce the environmental and social impact, experts cite several recommendations: choosing locations far from inhabited areas but close to waste generators; implementing specific mobility plans so that increased traffic doesn't affect residents; and employing the best air and waste treatment techniques. Furthermore, environmental monitoring and neighborhood participation in project development are identified as essential to ensure their successful integration.
Experience in Europe, where thousands of plants are operating, demonstrates that strict regulation and the adoption of best practices can minimize incidents and disruptions. Despite the controversy, the sector is considered a key tool for moving toward climate neutrality and the circular economy.
Social involvement and transparency: pillars for the future of biogas
The most important challenge for the coming years will be to achieve social acceptance of these facilities.To this end, many voices are calling for communities to be involved in the various phases of projects, from planning to operation, promoting transparency and addressing residents' concerns.
Responsible risk management, fluid communication, and consideration of neighborhood concerns are key to reducing rejection and fostering coexistence with these infrastructures. Furthermore, compliance with strict environmental regulations and public oversight foster trust and help maximize the opportunities offered by biogas in the context of the energy transition.