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MICROBOLOGICAL INDUCED COROSSION (MIC) PROTECTION FOR CONCRETE SEWERAGE SYSTEMS AP/M PERMAFORM History of MIC? “Concrete Eating”. Even today, almost 60 years after the 1945 discovery of Microbial Induced Corrosion (MIC) by C.D. Parker we continue to incorrectly refer to the corrosive deterioration of sewer pipe as “a H2S Gas Problem” Microbiologically Induced Corrosion. The primary problem for concrete in the sewer environment is Thiobacillus thiooxidans (concretivorous) – Latin for “concrete-eating”. Corrosion of Concrete Pipe and Manholes In Sanitary Sewer Systems (MIC) Microbiologically Induced Corrosion AP/M PERMAFORM Prevent MIC Corrosion Consistently Safely Economically ConMICShield is a revolutionary technology for the effective and economical prevention of Microbiologically Induced Corrosion commonly developed on concrete pipe and manholes in sanitary sewer systems No Bacteria No Acid No Corrosion AP/M PERMAFORM Step 1: Anaerobic bacteria form in raw sewerage and produce H2S. Factors contributing to rapid bacterial growth are temperature, retention time, high BOD levels and turbulence. AP/M PERMAFORM Step 2: Turbulence form force mains, drop manholes, steep grade changes and pumping stations allow the H2S to release into the atmosphere in pipes and manholes. AP/M PERMAFORM Step 3: H2S is converted into sulfuric acid H2SO4 by the aerobic thiobacillus bacteria that grow on the concrete surfaces above the waste water flows. AP/M PERMAFORM Step 4: Sulfuric acid H2SO4 produced by the aerobic, thiobacillus bacteria quickly corrode the concrete resulting in severe structural damage to the pipe and manholes AP/M PERMAFORM AP/M PERMAFORM TRADITIONAL APPROACH TO CONTROL CORROSION Different approaches to control corrosion of the structures, normally is done by placing a barrier between the concrete and the corrosive acid. These techniques are not appropriate to protect from MIC. These can be generally classified as below. i. Protective Barriers like Sewer Lining Techniques. ii. Elimination/Control of Gas. iii.Treatment of sewerages. iv.Substitute for concrete products. Protective Barriers like Sewer Lining Techniques Various types of lining available are Polyurea Lining, PVC lining, RotaLoc Lining, HDPE Lining, High Alumina Lining, Purethane, & etc. Common causes found with these systems:i. Delaminating. ii. Pinholes or Rips on the liner or coat. iii. Best systems involve specialized products and equipments and can be expensive. AP/M PERMAFORM • When a single cell microorganism comes in contact with the polymer in ConShield® the cell membrane ruptures and the organism dies. SOLUTION BREAK THE CHAIN Attack and kills the bacteria breaking the biological chain of events that produces the sulfuric acid. With MIC ® Con Shield HAMPTON AFTER 6 YEARS IN SERVICE Without MIC ® Con Shield HAMPTON AFTER 6 YEARS IN SERVICE CITY OF GRAND RAPIDS 8 YEARS IN SERVICE biotech armor for concrete 8 Years in Service Grand Rapids, MI AP/M PERMAFORM Prevent MIC Corrosion Consistently Safely Economically ConMICShield is a liquid admixture that is easily dosed at the plant for new precast structures or in the field for new mortar linings used for rehabilitation. ConMICShield prevents the acid-producing bacteria (thiobacillus) from colonizing into concentrations that produce sulfuric acid. No Bacteria No Acid No Corrosion AP/M PERMAFORM Prevent MIC Corrosion Consistently Safely Economically ConMICShield molecularly bonds to the cement particles. It cannot wash off, cannot chip off, cannot peel off, delaminate or pinhole. ConMICShield thoroughly impregnates the concrete matrix. Scraping the surface only serves to expose additionally treated concrete. You never run out of protection. No Bacteria No Acid No Corrosion AP/M PERMAFORM * Test Reports Are Available ConShield is a liquid additive that can be added to the concrete mix to eliminate MIC corrosion on: • • • • Pipe Manholes Wet wells Poured in place structures ConShield is: • Colorless, Odorless • Non Toxic • EPA Registered anti-bacterial agent ConShield can be applied to: • New Structures • Existing Structures • Deteriorated Structures ConShield Cannot: • Wash off • • • Chip off Peel off Delaminate or Pinhole SUMMARY: • unprotected concrete corrodes in MIC (sulfide) conditions • ConShield prevents growth of acid-producing bacteria • NO BACTERIA > NO ACID > NO CORROSION • ConShield is easily dosed into precast concrete pipe & manholes • ConShield is easily added to ready-mix for poured structures • ConShield is proven, long-lasting protection Video biotech armor for concrete Thank You For further details contact: Dattatreya INC. (O): 0265 2974338 (M): 8141336729 [email protected] www.dattatreyainc.com