Water and Effluents

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  • Percentage of water consumption from alternative water sources (i.e. grey water, rainwater, sewage)

    Related Material Issues

    Context:

    Suzano’s industrial units operate as “Sustainable Water Reservoirs”, since around 85% of the water collected is recirculated within the production process itself before being treated and returned to the environment. The concept of “reservoirs” originates in the process of capturing water from the environment, through surface rivers (receiving bodies), undergoing treatment in a water treatment plant for its suitability for industrial use, distribution and recirculation of water in the production process and, finally, treatment of effluents within the proper conditions provided for in Brazilian environmental legislation. The term “sustainable reservoir” refers to the recirculation capacity within the production process, where more than 85% of the water captured is reused before it is released into the environment (Figure 1). This recirculation occurs due to a series of internal reuses of industrial water, including cooling water, hot water, condensates (steam and liquor), bleach filtered, white water from drying machines and internal recirculations in the treatment plant itself of water. In addition, the company operates within the reference limits of best international practices, such as the IPPC – Integrated Pollution Prevention and Control and IFC – International Finance Corporation, which stipulate limits ranging from a minimum of 25 m³/tsa to 50 m³/tsa.

    Also, the Tres Lagoas Mill has already used the best practice through the reuse of approximately 60 m³/h of rainwater at factory 1 whose flow is approximately 4000 m³/h. There is no reuse at factory 2 whose flow is approximately 5500 m³/h.