期刊
WATER ENVIRONMENT RESEARCH
卷 80, 期 1, 页码 16-25出版社
WATER ENVIRONMENT FEDERATION
DOI: 10.2175/106143007X184537
关键词
concrete corrosion; force main; gravity sewer; hydrogen sulfide; modeling; wastewater quality
The formation and fate of sulfide in a force main and a downstream-located gravity sewer were investigated in an extensive field study. Sulfide formation in the force main was significant. However, during 14 minutes of transport in the gravity sewer, the sulfide concentration decreased 30%, on average. An application of a conceptual sewer process model for simulating the formation and fate of sulfide was demonstrated. Overall, the model predicted that approximately 90% of the decrease of the sulfide concentration in the gravity sewer was the result of sulfide oxidation and that only a small fraction entered the sewer atmosphere, causing odor and corrosion. Even so, the model predicted concrete corrosion rates of up to 1.2 mm/y in the gravity sewer section.
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