Microbiologically induced corrosion (MIC) was a persistent maintenance issue for Miami-Dade (Fla.) Water and Sewer Department (MDWASD).
“We spend a lot of money repairing corrosion,” says associate director John Chorlog, P.E. “Over the last 20 years, MIC has cost us hundreds of millions of dollars.”
To fight MIC in the construction of an upgrade to its Black Point Wastewater Treatment Plant, the department deployed a U.S. EPA-registered antibacterial additive mixed with concrete at the batch plant. Department leaders hope the additive will prove as successful as when used over the past 10 years to protect manholes.
Biological attack
MIC occurs when the warm temperatures,
