Who we are


We are a publicly-owned company, operating in the Barcelona metropolitan area, specialised in managing environmental services related to the circular economy.

Through our activity we provide solutions to the challenges of managing waste and the generation and commercialisation of renewable energy, and promoting citizen commitment to the environment.

TERSA Group is formed by TERSA, SEMESA and SIRESA.

More than 400 people form part of the TERSA Group professional team

Mission, vision, and Values



Our mission is to manage environmental services in the metropolitan area of Barcelona related to the circular economy, the management of municipal waste, the generation and commercialization of renewable energies and other services related to them, and the promotion of citizens' commitment to sustainability.

With our work, we strive to be a public service for the administrations, with the conviction that the end clients are citizens, and with the aim of improving society and the environment through our actions.



We aspire to be an EXPERT and REFERENCE GROUP of companies in circular economy (waste, renewable energies and other areas of sustainability), with a management model committed to Corporate Social Responsibility criteria. This system will allow us to make the best decisions for our stakeholders, ensure the sustainability of the organization through the efficient and transparent management of our operations and promote the professional development of the people who are part of it.

We integrate knowledge management and innovation to provide the best technologies and management systems.



  • With our work, we strive to have social benefits (positive influence on the environment and empowerment of our human capital), environmental benefits (minimisation of the impact on the environment and improvement of people's quality of life) and economic benefits (efficiency in the use of resources).

  • We base this work on making decisions and taking on behaviours that result in environmentally friendly processes, aimed at fulfilling social, economic and environmental objectives that are achievable, and that are subject to review, rethinking and adjustment to the reality of each moment, with continuity over time.


  • We are committed to transparent management: sharing truthful information with all internal and external levels of the organisation to transmit trust and promote co-responsibility.


  • We are committed both to the application of the best available technologies and to the incorporation of new management dynamics, in order to anticipate the future and face it with the best possible guarantees.

  • We guide people towards constant innovation in their daily tasks, contributing ideas, fulfilling them in their jobs and promoting knowledge management.

  • We are committed to the continuous improvement and quality of our activities and services, always guaranteeing the expectations of our stakeholders through innovation.

Structures and activities

Our shareholders are Barcelona Council through the Barcelona de Serveis Municipals SA (B:SM) company, Àrea Metropolitana de Barcelona (AMB) and metropolitan councils (Sant Boi de Llobregat, Sant Feliu de Llobregat, Sant Vicenç dels Horts, Esplugues de Llobregat, Sant Just Desvern, El Papiol, Santa Coloma de Gramenet, Castellbisbal and Barberà del Vallès).

The main structure of group is formed by TERSA and its affiliates SEMESA and SIRESA, both companies owned 100% by TERSA. The group also participates in other companies.


Tractament i Selecció de Residus, S.A. (TERSA)

  • Barcelona Energia

  • Photovoltaic Installations

  • Biogas for energy use

  • Waste-to-Energy


Selectives Metropolitanes S.A. (SEMESA)

  • Selection of lightweight packaging

  • Treatment of bulky waste and wood


Solucions Integrals per als Residus S.A. (SIRESA)

  • Collection centres

  • Collection and transport of residues from the collections centres

  • Ecomanagement: inspection, training, and environmental projects services

  • Barcelona + Sostenible


1975 Inauguration of the Waste-to-Energy Plant (PVE). Start of the operation by the companies responsible for its construction.

1983 Incorporation of Tractament i Eliminació de Residus, S.A. (TERSA), that later changed its business name to Tractament i Selecció de Residus, S.A.

1992 Incorporation of Selectives Metropolitanes, S.A. (SEMESA)

1997 Change of the shareholding structure of TERSA, that became a 100% public company.

2000 Incorporation of Solucions Integrals per als Residus S.A. (SIRESA)

2006 Start-up of l'Ecoparc del Mediterrani; that together with the PVE form the Waste-to-Energy Integrated Plant.

2009 Start of the management of municipal photovoltaic installations and the Agenda 21 Programme, currently Barcelona + Sostenible.

2008-2014 Development of the Director Plan for adapting the PVE to the new Catalonia municipal residues management model.

2014-2015 Development of the optimisation work in the Gavà-Viladecans Municipal Residues Treatment Centre

2018 Start of management of Waste-to-Energy Biogas Plant in Garraf

2018 Start of Barcelona Energia, the public commerce for the Barcelona metropolitan area

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