Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Warm Wastewater Turbulence Influence on Odor and Corrosion Intensity in a Concrete Sewer
When wastewater flows reach the 8- to 16-cubic feet per second, or cfs, (5- to 10-million-gallons-per-day [mgd]) range, the selection of gravity sewer pipe materials 15 to 25 years ago was limited basically to clay, concrete, and ductile iron. As flows went above 31 cfs (20 mgd), the choice of pipe materials for gravity flow was primarily concrete pipe. That was the case for the Water Works and Sanitary Sewer Board of the City of Montgomery, Alabama (Board), in the mid-1970s when it installed more than 21,950 meters (72,000 linear feet) of reinforced concrete sewer pipe of diameters ranging from 76 to 168 centimeters (cm), or 30 inches to 66 inches, in the Board's Catoma Basin. Concrete sewer pipe and manholes can have a life expectancy of greater than 50 years under certain environmental conditions. However, concrete sewer pipe and manholes are vulnerable to hydrogen sulfide (H2S) attack and to varying degrees of subsequent corrosion during the seasonal temperature cycles. For concrete sewer pipe in warmer climates or pipe that experience 3-month periods that average greater than 20 degrees Celsius (°C), the concrete should be protected; otherwise, the pipe could fail in as few as 10 to 15 years in aggressive H2S environments. The Board's Catoma Wastewater Treatment Plant (WWTP) will have influent temperatures that average 26 to 28 °C over a consecutive 3-month period. This temperature range usually occurs in June, July, and August.
Warm Wastewater Turbulence Influence on Odor and Corrosion Intensity in a Concrete Sewer
When wastewater flows reach the 8- to 16-cubic feet per second, or cfs, (5- to 10-million-gallons-per-day [mgd]) range, the selection of gravity sewer pipe materials 15 to 25 years ago was limited basically to clay, concrete, and ductile iron. As flows went above 31 cfs (20 mgd), the choice of pipe materials for gravity flow was primarily concrete pipe. That was the case for the Water Works and Sanitary Sewer Board of the City of Montgomery, Alabama (Board), in the mid-1970s when it installed more than 21,950 meters (72,000 linear feet) of reinforced concrete sewer pipe of diameters ranging from 76 to 168 centimeters (cm), or 30 inches to 66 inches, in the Board's Catoma Basin. Concrete sewer pipe and manholes can have a life expectancy of greater than 50 years under certain environmental conditions. However, concrete sewer pipe and manholes are vulnerable to hydrogen sulfide (H2S) attack and to varying degrees of subsequent corrosion during the seasonal temperature cycles. For concrete sewer pipe in warmer climates or pipe that experience 3-month periods that average greater than 20 degrees Celsius (°C), the concrete should be protected; otherwise, the pipe could fail in as few as 10 to 15 years in aggressive H2S environments. The Board's Catoma Wastewater Treatment Plant (WWTP) will have influent temperatures that average 26 to 28 °C over a consecutive 3-month period. This temperature range usually occurs in June, July, and August.
Warm Wastewater Turbulence Influence on Odor and Corrosion Intensity in a Concrete Sewer
Rowe, Reggie (Autor:in)
Pipeline Division Specialty Conference 2001 ; 2001 ; San Diego, California, United States
Pipelines 2001 ; 1-12
01.07.2001
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Odors , Pipe materials , Wastewater management , Construction , Turbulence , Design , Pipes , Corrosion , Rehabilitation , Sewer pipes , Pipelines
CONCRETE SEWER CORROSION DUE TO WASTEWATER INOCULATION
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