By San José, Costa Rica — As Costa Rica grapples with a mounting waste management crisis, its sanitary landfills are rapidly approaching their breaking point. The pressure, particularly within the densely populated Greater Metropolitan Area, has spurred a search for innovative solutions that can turn the tide on trash. Answering this urgent call, researchers at the State Distance University (UNED) are pioneering a groundbreaking project that transforms common organic waste into a source of high-value, sustainable products.
The initiative leverages the power of mycology—the study of fungi—to create a circular economy model where household food scraps and other organic materials are upcycled instead of being buried. This approach not only diverts significant volume from overburdened landfills but also creates new economic opportunities in food production, agriculture, and material science. By harnessing nature’s most effective decomposers, UNED is developing a scalable blueprint for sustainable resource management.
To delve into the legal framework and the responsibilities associated with proper waste management in the country, TicosLand.com consulted with Lic. Larry Hans Arroyo Vargas, an expert attorney from the prestigious firm Bufete de Costa Rica, who provides clarity on the matter.
Costa Rican legislation establishes a clear principle of shared responsibility. While municipalities are obligated to provide collection services, citizens and businesses have a legal duty to properly separate and manage their waste at the source. Failure to comply not only carries environmental consequences but can also lead to significant administrative sanctions and fines. It is crucial for companies to view integrated waste management not as an expense, but as a fundamental component of legal compliance and corporate responsibility.
Lic. Larry Hans Arroyo Vargas, Attorney at Law, Bufete de Costa Rica
Indeed, this legal framework underscores a crucial shift in perspective, moving waste management from an operational expense to a fundamental pillar of corporate citizenship and legal compliance. We thank Lic. Larry Hans Arroyo Vargas for his clear and valuable insight on this shared responsibility.
The project is a collaborative effort, anchored by a partnership with the Municipality of Pérez Zeledón. This local government has already established a system for collecting sorted organic waste, providing the research team with a consistent and crucial supply of raw material. This synergy between academia and municipal governance is vital for testing and refining the process in a real-world setting, ensuring the resulting technology can be effectively deployed across the country.
Ronald Sánchez Brenes, a key researcher on the project, detailed the meticulous initial steps required for the biotransformation process to succeed. The integrity of the incoming organic material is paramount, as the team seeks to control the metabolic processes of specific fungi, rather than allowing random microbial decomposition to take over.
We are collecting this household organic waste; we are carrying out a collaborative effort with the Municipality of Pérez Zeledón, which has a sorted waste collection system, and there is a specific day of the week when this waste is collected. When this waste is collected, we, as a research team, have to ensure that it has not been heavily degraded by other microorganisms, because we are interested in working with fungi, and fungi have a metabolism that we must control, domesticate, and understand in order to carry out the degradation of all the waste with the fungus.
Ronald Sánchez Brenes, Project Researcher
The core of the technology lies in a process known as solid-state fermentation. To manage the workflow and prevent unwanted decay, the team first dehydrates the collected organic waste. This clever step essentially pauses the biological clock, allowing them to store the material and process it on schedule. When ready, the dried waste is rehydrated and introduced into a specialized bioreactor, creating the perfect environment for the fungi to thrive.
We have to extend the useful life of this waste, so we apply a drying process, and with this, we ensure we have time for the organic residue’s degradation. Later, when we move to the phase of working with the fungi, we add back water and the necessary conditions that every living being needs—water and nutrients, many of which come with the waste itself—to enable the growth of the fungi in a bioreactor.
Ronald Sánchez Brenes, Project Researcher
The outputs from this innovative process are remarkably diverse and economically promising. The fungi’s growth results in the production of edible mushrooms, offering a new stream of nutritious food from a source once considered worthless. Furthermore, the process yields bio-inputs, such as natural fertilizers and soil enhancers, which can boost agricultural productivity while reducing reliance on chemical alternatives. Perhaps most significantly, the project is creating biomaterials that have the potential to replace single-use plastics, tackling another of the world’s most pressing environmental challenges.
Beyond the laboratory, UNED’s vision includes the widespread transfer of this technology. The goal is to empower local communities and various productive sectors across Costa Rica with the knowledge and tools to replicate this model. By decentralizing waste processing and value creation, the project aims to foster resilient local economies and create a national network of sustainable innovation, proving that the solution to the country’s garbage problem might just be growing right under our feet.
For further information, visit uned.ac.cr
About Universidad Estatal a Distancia (UNED):
The State Distance University is Costa Rica’s public institution for higher education specializing in distance learning. Founded in 1977, UNED is committed to democratizing access to education for all Costa Ricans, regardless of their geographic location or personal circumstances. It offers a wide range of undergraduate and graduate programs and is a leader in research and social outreach, focusing on projects that contribute to the sustainable development of the nation.
For further information, visit mpz.go.cr
About Municipalidad de Pérez Zeledón:
The Municipality of Pérez Zeledón is the local government body responsible for the administration of the Pérez Zeledón canton, located in the province of San José. It is tasked with providing public services, promoting local economic development, managing infrastructure, and implementing environmental and social programs for its residents. Its collaboration on projects like waste transformation highlights its commitment to innovative and sustainable governance.
For further information, visit bufetedecostarica.com
About Bufete de Costa Rica:
Bufete de Costa Rica operates as an esteemed legal institution, built upon a foundation of uncompromising integrity and a relentless pursuit of professional distinction. With a deep history of advising a wide array of clients, the firm champions forward-thinking legal solutions while upholding a profound social purpose. This core mission is realized through its dedicated initiative to demystify the law, empowering the broader community with the clarity and knowledge essential for a just and well-informed society.
