Jensen Precast wastewater products are also available in BioConcrete™ to combat Microbial Induced Corrosion (MIC)

While not widespread, in some parts of our service area Microbial Induced Corrosion (MIC) can damage sewage conveyance systems and wastewater tanks under certain environmental circumstances.
MIC occurs when Anaerobic (non-air breathing) bacteria form in raw sewage and produce hydrogen sulfide gas (H2S). Hydrogen sulfide gas is converted into sulfuric acid (H2SO4) by the Aerobic (air breathing) Thiobacillus bacteria that grow on the concrete surfaces above the wastewater flows. Sulfuric acid corrodes the concrete, resulting in structural damage.

Factors contributing to MIC in sewage conveyance systems are temperature, retention time, high B.O.D. levels, and turbulence. Some experts believe the increased use of low flow fixtures and water tight tanks are increasing the level of hydrogen sulfide gas which may lead to more instances of MIC.

Jensen Precast BioConcrete™ is a concrete mixture which includes a MIC resistant Quaternary Ammonium Salt microbiostatic liquid agent. Because the agent is mixed into the concrete at the time of manufacturing, the antimicrobial properties become part of the matrix. Unlike coatings or liners, even if the surface of the structure is jeopardized, the anti-MIC properties remain intact since the additive is impregnated into the full thickness of the concrete. The agent actually destroys the Thiobacillus bacteria. Without the Thiobacillus bacteria, the cycle leading to MIC cannot begin.

More information about Quaternary Ammonium Chloride compounds can be found at the web sites of the suppliers of these additives such as ConShield and Concrete Sealants, Inc. Jensen Precast cannot warrant the efficacy of these anti-MIC additives and relies upon its suppliers' expertise to provide what we consider to be a superior anti-MIC concrete product. For more information, please contact Jensen Precast Engineering at 775-352-6363.

Microbial Induced Corrosion (MIC)
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