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Efficient Management
Ever since our founding we have carried out an efficient management of Natural Resources, always seeking the best practices in the market. Eneva is working to consolidated a culture of health and safety together with its stakeholders and employees, without losing sight of the permanent improvement that allows us to achieve better results day after day.
Emissions and climate change
Well aware that energy sustains modern life, Eneva plays an important role in Brazilian society by providing the base for a healthier, more prosperous and sustainable future. In this way we strengthen the Brazilian energy transition and produce more energy with less polluting fuel for the Brazilian electrical system and protect the Brazilian matrix from having to deal with the intermittency of renewable energy.
The Integrated Azulão-Jaguatirica Project II, winner of the 2019 auction to supply Boa Vista and other connected locations, will substitute the diesel-oil-fueled thermal power plants in Boa Vista for natural gas, which is less polluting and cheaper, cutting the emission of CO2 by approximately 35% in the electrical sector of the state of Roraima. This represents 180,000 tons/year less C02 released into the atmosphere. The emissions of NOx will be reduced by 99%.
Operational Efficiency
One of our directives of Sustainability is to improve the efficiency of our operational enterprises, producing more energy with a lower consumption of fuel and, consequently, lower associated emissions. In the coal-burning power plants, we use imported coal which has a lower level of pollutants and greater heating rate.
Control and monitoring
All our enterprises use Low-Nox technology, which boasts a low emission of nitrogen oxide (NOx) due to the conjoined combustion and boiler systems. This works thanks to the project of the two-stage burner, minimizing the injection of air and controlling the temperature of combustion. The coal-fueled power plants also use equipment to reduce the emission of sulphur oxide (SOx) – the Spray Semi-Dry Absorber – SDA and baghouses to reduce the emission of particulates.
The company limits for the emissions adopted by Eneva are tighter than those laid down by Brazilian environmental legislation.
Atmospheric emissions are monitored twenty-four hours a day through the continuous emissions monitoring system – CEMS, a system which generates data every 15 minutes Taken from sensors fitted to the inside of the chimneys. The CEMS is internationally-recognized and recommended by the United States Environmental Protection Agency – US-EPA – to determine the concentration of gases and particulates. The data monitored in the coal-fueled power plants of Itaqui (MA) and Pecém II (CE) Is sent online to Ibama (The Brazilian Institute for the Environment and Natural Resources) through the Environmental Information System – SIA.
Re-use of Ashes
Over the last 6 years Eneva has invested in socio-environmental actions aimed at reducing emissions. One of these initiatives is the re-use of ash produced during the production of energy in coal-fueled power plants. (Itaqui (MA) and Pecém II (CE). The cement industry re-utilizes this raw material to reduce the quantity of clinker In the production line. This measure has led to the reduction in CO2 emissions and Eneva has met the National Policy on Solid Waste (Law nº 12.305/10), meaning that the ashes are not dumped at appropriate sites in Maranhão and Ceará.
Water Resources
Eneva pays special attention to the use of water. In thermoelectric power plants, the majority of the water used is for cooling the turbines. In the company’s operations this consumption of water is always below the quantity authorized, precisely to guarantee the availability of this resource in the long-term. Air-cooled Refrigeration technology is being incorporated in to the new in ventures, such as at the Jaguatirica II plant in Boa Vista (RR), which will not rely on water to cool the turbines. The process will be carried out by an air-cooled condenser.