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The Organic Waste valorization through Composting is a form of valorization of great importance in solid waste management policies, one of the main guidelines referred to by PERSU - Strategic Plan for Municipal Solid Waste and the national strategy to reduce organic waste in landfills. Promote the value of all components of the waste, including organic, it is therefore a priority objective of LIPOR.
Since the creation of LIPOR in 1982 the use of biodegradable waste to produce Compost has been a major component of the integrated waste management policy.
The old Composting Unit, inaugurated in 1966, allowed the valorization of the organic fraction present in MSW for more than 30 years, processing daily more than 200 tons of mixed waste. The composting process was carried out in the open, through piles with mechanical tillage to ensure its ventilation.
This composting facility was closed in August 2001 and LIPOR started building a modern Composting Plant in 2002.
At LIPOR, the organic recovery is ensured by a composting plant with capacity to treat 60.000t / year of organic waste, associated with the implementation of separate collection schemes for the organic fraction from large producers (restaurants, supermarkets, markets) and separate collection schemes of green waste, and is complemented by the promotion of home composting projects ("Horta da Formiga”, "Horta à Porta”, "Jardim ao Natural” and "Dose Certa”).
The quality in the careful selection of organic matter for composting and in the produced compost is very important and is a key aspect for the viability and success of the project.
The use of organic matter in the soil has major benefits,like the improvement of the soil characteristics (porosity, water holding capacity) and as an agent to prevent soil degradation, contributing in an effective way to minimize erosion, compaction, salinization and desertification of the soil.