Recent findings on sinks for sulfide in gravity sewer networks

Asbjørn Haaning Nielsen, Thorkild Hvitved-Jacobsen, Jes Vollertsen

Research output: Contribution to journalJournal articleResearchpeer-review

8 Citations (Scopus)

Abstract

Sulfide buildup in sewer networks is associated with several problems, including health impacts, corrosion of sewer structures and odor nuisance. In recent years, significant advances in the knowledge of the major processes governing sulfide buildup in sewer networks have been made. This paper summarizes this newly obtained knowledge and emphasizes important implications of the findings. Model simulations of the in-sewer processes important for the sulfur cycle showed that sulfide oxidation in the wetted biofilm is typically the most important sink for dissolved sulfide in gravity sewers. However, sulfide emission and thereby potential hydrogen sulfide buildup in the sewer atmosphere is of particular importance in sewers constructed with large diameter pipes, in sewers constructed with steep slopes and in sewers conveying low pH wastewater. Precipitation of metal sulfides is only important when the sulfide concentration in the wastewater is low; i.e., less than 1 g S/m3.
Original languageEnglish
JournalWater Science and Technology
Volume54
Issue number6-7
Pages (from-to)127-134
Number of pages8
ISSN0273-1223
Publication statusPublished - 2006

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