Selective Collection of the Biodegradable Fraction

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Selective Collection of the Biodegradable Fraction
Since LIPOR was formed in 1982, the Organic Recovery through Composting has been one of the main components of the solid waste integrated management policy, by using biodegradable waste to produce Compost.

To ensure a final product (compost) with great quality it is essential that waste with high amount of organic matter is used, which eliminates the possibility of acceptance of unsorted waste by Lipor's Composting Plant.

In order to fulfil that goal, LIPOR has identified the main types of waste that should be selectively collected at their source:

Green waste (gardens, parks, cemeteries);
Restaurants e similar establishments (hotels, bars, canteens);
Markets, fairs and fresh products processing and/or distribution centres;
Putrescible fraction from door-to-door selective collection circuits.

If necessary, complementary materials like wood chips, straw or sawdust can be added. These complementary materials will improve the composition of the initial mixture.

Within the scope of its Organic Recovery strategy, LIPOR has implemented several projects in order to promote the selective separation of the organic fraction from domestic waste and waste that comes from large producers, such as restaurants, markets, supermarkets, agricultural cooperatives and food processing industrial units.

A team of technicians from LIPOR has performed a general profiling of HORECA establishments, by conducting inquiries that allowed them to gather data about the procedures and habits of those establishments and the quantity and characteristics of their waste. They also gathered information about current waste sorting practices and the openness to new waste sorting practices. This study included establishments from the eight associated municipalities.

After the diagnosis phase, selective collection circuits for the putrescible fraction were implemented. Organic waste is disposed of in specific containers and collected from 3 to 7 days a week. The "Operação Restauração 5 Estrelas" project (Operation 5 Stars Catering) also provides a large amount of information and awareness material.

In 2014 this project was implemented in the eight Lipor municipalities, covering more than 1700 establishments from HORECA and similar sectors spread over 17 door-to-door selective sampling circuits at Lipor Municipalities. Under established protocols with the municipalities of Esposende and Viana do Castelo (Resulima multimunicipal system) and more recently at Ambisousa Intermunicipal Sistem, it was possible to conceive and implement circuits of deposition and selective collection of organic waste directed to various establishments (school canteens, catering).

The project made it possible to develop through the process of composting a total of 14.642 tons of organic waste, which meant an increase of 8.5% compared to 2013. The amount of organic waste transferred to the CVO resulted in a daily recovery of about 23.6 kg/establishment, which well reflects the importance of this initiative in Lipor organic strategy and its Municipalities.

For the Selective Collection of the Organic Fraction in Markets, Supermarkets, Fairs, Fresh Products Distribution Centres, etc., we use closed medium/large capacity containers and the collection frequency is defined according to the amount of waste produced. The project is complemented by a wide communication and awareness campaign amongst producers.

In the short-term, we plan on implementing domestic organic waste collection. We've already performed an experiment in the Municipality of Maia, which included 270 buildings with waste compartments and the delivery of brown containers for putrescible waste disposal, in addition to the containers for recyclable waste.

In 2010, inquiries were performed amongst the population of Póvoa de Varzim and Espinho, in order to assess the openness to organic waste (food and garden waste) disposal and selective collection.

The Green Waste selective collection is ensured by Drop-off Sites (21 within LIPOR's area) and specific circuits, whether arranged by City Councils or private companies (gardening businesses, etc.).

In the middle of 2004, we also began to sort green waste from cemeteries, through a platform that was created for its reception and preparation.

A team of 7 employees sorts green waste (flowers and foliage) daily, removing all kind of contaminants (wax, candle cups, detergent packaging, bits of marble, etc.). This project has allowed the composting of a large amount of flowers and other green waste having the value reached the 2,331 tons in 2014.. On the other hand, in addition to the recovery of green waste, all recyclable materials (plastic packages, cardboard, glass, metal) are sent to recovery facilities, as well waxes and paraffins.

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