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DEALING WITH H2S CORROSION IN THE GORDON TRUNK SEWER


March 27-31, 2011

Environmental & Engineering Services, City of London, London, ON


Since 2000 the City of London has been actively dealing with the effects of high levels of hydrogen sulphide in the Gordon Sanitary Trunk Sewer. Built in the late 1960s, the 5km concrete gravity sewer is fed by a 5km forcemain, and consists of pipe sizes ranging from 825mm to 1350mm. Contributing to the generation of hydrogen sulphide are upstream users that generate sewage with elevated BOD levels and poor hydraulics throughout the system. As a result, the City received complaints of odours; inspections revealed moderate to severe microbial induced corrosion throughout the sewer.


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