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SKOWHEGAN — Sappi North America acquired an environmental award earlier this month for a mission accomplished on the Somerset Mill.
Sappi was named a recipient of the Management in Sustainability – Water Award from the American Forest & Paper Affiliation as a part of its “Higher Practices, Higher Planet” Sustainability Awards Program. The mission, titled Caustic Reclaim and Reuse, was achieved in Skowhegan on the Somerset Mill.
The mission aimed to scale back the quantity of chemical substances the mill bought to fulfill environmental objectives within the course of it makes use of to take away sulfur dioxide in its boiler flue-glass desulfurization, or FGD, program and to offset using acid in its onsite liquid waste therapy plant.
The Somerset Mill operates a big steam plant and makes use of demineralized water as a major make-up water supply for its restoration boiler and two multi-fuel energy boilers.
“Sustainability stays Sappi’s precedence and is essential to our technique. On the Somerset Mill, we try to problem trade requirements and ourselves to create progressive strategies to raised our surroundings,” stated Sean Wallace, managing director, Sappi Somerset Mill. “Receiving this recognition from AF&PA is an honor, and we stay up for being part of the trade’s step towards the affiliation’s ‘Higher Practices, Higher Planet 2020‘ sustainability objectives.”
The boiler FGD system was put in in 1989 with the aim to reduce the discharge of sulfur dioxide emissions into the ambiance. Sulfur dioxide is a poisonous gasoline that could be a by-product of burning fossil fuels containing sulfur compounds.
Sandy Taft, Sappi’s director of sustainability, stated the mill’s mission consists of a giant spray tower with a number of ranges of nozzles that spray excessive charges of water into the flue gasoline in its path between the boiler and its exhaust stack. Reagents, corresponding to bought caustic, are used to maintain the pH of the water impartial, neither too acid nor too alkaline, which permits the sulfur dioxide to be eliminated within the moist scrubbing course of.
The Somerset Mill’s mission is anticipated to scale back caustic purchases used within the removing of sulfur dioxide, in addition to to scale back acid utilization within the therapy of liquid waste as a result of it reclaims from the sewer the spent caustic and the water that’s diluting it to the decrease focus.
The reclaimed water in flip reduces the demand for recent water that the FGD scrubber wants to fulfill its evaporation necessities by 12,000 gallons per day. By implementing the same course of, different mills can scale back chemical demand by reusing demineralized regeneration caustic, saving the mill cash.
“The mission represents important chemical and water financial savings by placing an effluent stream to good use,” Taft stated. “This isn’t solely vital economically, nevertheless it provides Sappi one other avenue to advertise its sustainability efforts.
“Demonstrating sustainability with acknowledged tasks corresponding to this helps by way of attracting proficient folks to the mill and constructing/sustaining our buyer base.”
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