GLOUCESTER After biogenic sulfide corrosion attacked concrete structures at the wastewater treatment plant in Gloucester, Massachusetts, project engineers fought back with a Tnemec lining system specifically designed for severe wastewater headspace environments. “Existing concrete was deteriorating due to hydrogen sulfide (H 2 S) gas and sulfuric acid resulting from the wastewater off-gassing,” Tnemec coating consultant Larry Mitkus explaine

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