Composting, the age-old practice of converting organic waste into natural fertilizer, is experiencing a boom in Spain. Governments in various regions are investing in initiatives ranging from distributing free composters to building specialized infrastructure for processing plant waste. The common goal is to reduce residual waste and move towards a circular economy model that makes the most of available resources.
Two recent examples illustrate this trend: Sogama's home composting program in Galicia, which has already surpassed 500 participating organizations, and the new recycling center in Castro Urdiales, Cantabria, which includes a composting plant for pruning waste. Both initiatives agree that organic matter represents between 37% and 40% of household waste , a percentage that, if managed at the source, can lead to considerable savings in transportation and treatment.
Home composting is gaining ground in Galicia
The public company Sogama, based in Cerceda, has distributed more than 24.200 composters free of charge to 235 municipalities, 230 schools, and 35 community organizations. These 400-liter containers, made from recycled and recyclable materials , are designed for single-family homes with a garden, allotment, or plot of land where the resulting compost can be used. The initiative aims to revive the rural tradition of separating organic waste, but with a modern, efficient, and hygienic approach, similar to the home composting programs promoted by local councils.
In addition to providing the materials, Sogama offers in-person training and distributes manuals that explain everything from which waste can be composted to how to control temperature, humidity, and oxygen levels. This technical support is essential to ensure the process runs smoothly and that families obtain high-quality compost. According to program data, treating organic matter at the source reduces the amount of garbage deposited in the black bin and, consequently, the cost that municipalities pay for waste management services.
New infrastructure for the treatment of organic waste
In Cantabria, the regional government has inaugurated the new recycling center in Castro Urdiales, located in the Vallegón industrial park. The facility represents an investment of €2.187.321, co-financed by the European Union's Next Generation funds , and will be managed by the public company MARE. It replaces the old recycling center in Islares, which became obsolete and will now operate as a transfer station.
The new recycling center has more containers to improve waste separation and includes a dedicated composting plant for pruning waste. This allows for the treatment of plant waste within the municipality itself, avoiding its transport to other facilities and reducing emissions associated with transportation, thus optimizing the management of green waste and composting . Furthermore, Cantabria's network of recycling centers now comprises 38 permanent facilities, open to free use by all residents.
Usage data reflects the growing environmental awareness: in 2025, recycling centers registered 338.929 users, 5% more than the previous year, and collected 63.005 tons of waste, a 4% increase. In the first five months of 2026, 173.438 users and 33.400 tons of waste had already been recorded , highlighting the need to continue expanding and modernizing this infrastructure. The Minister of Public Works, Roberto Media, emphasized that the regional government is investing nearly €20 million in modernizing the network, including digitalization and the construction of new centers.
Environmental and economic benefits of composting
Beyond the specific figures, home and community composting offers clear advantages. By transforming kitchen and garden waste into compost, it prevents it from ending up in landfills or treatment plants , reducing greenhouse gas emissions and the need for chemical fertilizers. The resulting compost improves soil fertility and its ability to retain moisture, a particularly valuable benefit in dry or water-scarce areas.
The key to success, according to those in charge of these programs, lies in training and follow-up. When home composting workshops , manuals, and visits from technicians are offered, families and schools respond and get involved . The idea that organic waste is not garbage, but a resource with environmental value, is increasingly taking hold among the public. In both Galicia and Cantabria, the regional governments agree that composting is an effective tool for moving towards a more sustainable and circular waste management model.
The path to a circular economy involves initiatives like these, which combine the provision of resources with educational support. The reduction of residual waste, the cost savings for municipalities, and the production of high-quality natural fertilizer are tangible results that demonstrate that composting is not a fad, but a real and necessary solution for the future of the planet.
