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Cranston Print Works. 1995.

Spurred by a desire to meet the goals of the Massachusetts Toxics Use Reduction Act, the managers of Cranston Print Works altered their wastewater pH adjustment process to eliminate the use of sulfuric acid. The company installed a jet aeration system with injected liquid carbon dioxide to replace the two 4,300-gallon sumps in which wastewater neutralization had previously taken place. This $115,000 project eliminated the annual use of 2.66 million pounds of sulfuric acid. Although financial profit was not the main goal of the project, the company saved about $80,000 per year in chemical purchase and maintenance costs.

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