Seville produces over 270,000 tonnes of construction and demolition waste (CDW) per year, and around 123,000 tonnes of biowaste, recycling, respectively, 16,1% and 5%. In addition, most of the recycled CDW is used for building works and road fillings. Through its participation in CityLoops, Seville aims to increase the recycling rates of CDW and enable the transition from downcycling to higher quality recycling.
Regarding biowaste, Seville will work to expand and optimise the collection, treatment and valorisation across the city. In doing so, it will aim to optimise the collection from households and large generators, initiate awareness raising campaigns to reduce food waste and enhance correct waste separation, and develop a plan with recommendations for the upscaling of collection and the valorisation of this waste fraction for the entire city.
Seville is improving both its drinking water supply network and its sewage network, as well as its stormwater evacuation capability. This work will result in a great amount of CDW and excess soil, allowing Seville to implement a series of demonstration actions in the context of the CityLoops project.
Seville is to test residue from pipeline work in order to provide certifications and be able to replace more primary materials by CDW. These tests will also identify more potential uses for CDW. Furthermore, Seville aims to integrate guidelines for the use of recycled materials, stressing the re-use and recycling of CDW, in its public procurement contracts. Seville is also optimising household CDW collection and handling, and conducting an awareness-raising campaign, targeting citizens and small businesses, on the handling of CDW and soil.
Moving Forward to Biowaste Circularity
Seville aims to promote the separate collection of biowaste, maximize the use of the resources contained therein and optimize the current municipal collection system, all with the aim of achieving European and state objectives in the field of waste management.
In CityLoops, Seville will start from a diagnosis that will characterize the current situation of the flow of biowaste in the city, which will lay the foundations for the actions to be carried out. A software toll will be created that optimizes the collection logistics of the current biowaste routes, as well as the future scaling of this system to the rest of the city. The software tool will be tested through the implementation of a new route. This route will have associated information and awareness campaigns, in order to encourage participation and minimize food waste. Lastly, the biogas production of biowaste will be evaluated through several tests in a co-digestion process in a wastewater treatment plant.