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Ence's Navia biofactory in Spain sets new energy efficiency record for biomass boiler; processes such as dry debarking and utilizing a dryer to remove moisture from biomass prior to use helps increase its thermal potential, improve energy efficiency

October 20, 2023 (press release) –

This October, the Navia biofactory has surpassed the energy efficiency record in its biomass boiler. The condensation turbine associated with this installation has set a new historical record, generating 853.7 MWh of renewable energy in one work day, from plant remains, such as branches and bark from sustainably managed forest crops. The Navia biofactory is thus consolidated as a leading facility in energy efficiency.

In its biofactories, Ence uses a natural and renewable product such as wood as raw material and transforms it into a biodegradable and recyclable material, cellulose. In this production process, wood components that cannot be used to obtain cellulose, such as bark (biomass) and lignin, are used as a source of renewable energy, generating not only enough thermal and electrical energy to cover the needs of the plant, but to export to the grid and thus contribute to the decarbonization of the electricity mix.

To improve efficiency in the energy use of this biomass, Ence has implemented processes such as dry debarking and the launch in Navia of a dryer for biomass, taking advantage of the excess heat from other processes. In this way, moisture is removed from the biomass prior to use, thus increasing its thermal potential, and being a benchmark for energy efficiency.

This increase in renewable electricity generation is the result of investments made in the plant during the last annual technical stoppage for the modernization of various equipment. This optimization has allowed an increase in steam generation, an operational improvement of the facility and a reinforcement of its environmental excellence.

The energy facilities of Ence’s biofactories are integrated into the quality systems of each industrial complex. Each of them has Quality Certifications according to ISO 9001 and ISO 14001 Environmental standards, and are present in the Registry of companies that voluntarily adhere to the European Eco-management and Eco-Audit Regulation (EMAS).

Furthermore, in 2021 the Navia biofactory obtained the Certification of the energy management system in accordance with the UNE-EN-ISO 50001 standard, thus demonstrating the focus on continuous improvement of the aspects derived from its activity, also from the point of view of from an energetic point of view.

Throughout the process, Ence prioritizes the sustainability of the biomass it manages. For this reason, in 2017 Ence worked with different actors in the sector to develop a voluntary sustainability standard to ensure this responsible supply, and, more recently, it has pioneered a new biomass sustainability certification scheme, SURE System, in all its facilities, including the Asturian biofactory.

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