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- W3135909487 abstract "The production and emission of hydrogen sulfide (H 2 S) in sewer systems is associated with the corrosion of sewer structures and harmful odour. Numerous studies have been conducted to find the best solution to overcome this issue. The pH plays a critical role not only on microbial and chemical processes that are responsible for all processes of corrosion but also on the efficiency of several control methods. This paper first critically reviews the literature on the interplay between pH and various chemical and microbial in-sewer processes, followed by a review of the control methods that depend on pH or indirectly alter pH. The paper argues that proper evaluation of each method should include the impact the control method has on downstream processes. This paper concludes the raising of pH has several benefits but is operationally difficult to implement. It also emphasises single control method may not be as efficient as combination of one or two methods in controlling the production and emission of H 2 S. Finally, the research requirements and future directions in relation to emerging and potential methods that are not heavily reliant on pH control are discussed. • NH 3 and alkalinity keeps the pH higher, but fermentation decreases the pH. • The pH not only influences emission and production of H 2 S. but also CH 4 production. • Sewer pH is optimal for methanogens and sulfur reducing bacteria. • Success of many control methods depend on pH, but the adjustment of pH is complex. • Ferric sludge and a combination of air/oxygen and Fe 2+ are two promising methods." @default.
- W3135909487 created "2021-03-29" @default.
- W3135909487 creator A5042378178 @default.
- W3135909487 creator A5043944266 @default.
- W3135909487 creator A5078076848 @default.
- W3135909487 creator A5081722539 @default.
- W3135909487 date "2021-08-01" @default.
- W3135909487 modified "2023-10-03" @default.
- W3135909487 title "The role of pH on sewer corrosion processes and control methods: A review" @default.
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