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Controlling Sulfide Corrosion in Large Diameter Gravity Sewers (abstract)

by J. Redner, Sanitation Districts of Los Angeles, County, Los Angeles, CA, USA,
C. Jin, Sanitation Districts of Los Angeles, County, Los Angeles, CA, USA,
J. Fong, Sanitation Districts of Los Angeles, County, Los Angeles, CA, USA,
D. Won, Sanitation Districts of Los Angeles, County, Los Angeles, CA, USA,
C. Carry, Sanitation Districts of Los Angeles, County, Los Angeles, CA, USA,



Document Type: Proceeding Paper

Part of: Environmental Engineering

Abstract:

The County Sanitation Districts of Los Angeles County undertook a major evaluation of sewer system ranging in size from 1. 22 to 3. 65 meters in diameter that transports peak wastewater flow of 21 m**3/sec. Those reaches of sewer with serious corrosion problems were documented. Full scale evaluations of the sulfide control effectiveness of hydrogen peroxide, ferrous chloride, slug doing with sodium hydroxide and pure oxygen injection in large gravity trunk sewers were conducted. The annual operating costs for these control alternatives, the expected level of control obtainable, and the cost to replace or repair the existing sewers with corrosion resistant materials are compared.

Subject Headings: Sewers | Corrosion | Sulfides | Gravity sewers | Sodium | Iron (chemical) | Chloride | Los Angeles | California | United States

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