کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5740337 | 1616293 | 2017 | 9 صفحه PDF | دانلود رایگان |

- Designed laboratory scale reactor system simulated the actual sewer system well.
- Sulphate Reducing Bacteria (SRB) biofilm was grown on top of the concrete surface.
- The combination of pH control and ferrous chloride dosing was better than one alone.
- Measured and theoretical H2S (g) concentration were significantly different at pHÂ >Â 8.
Hydrogen sulphide (H2S) generation in sewer systems is a serious problem. A cost effective means of controlling sewer corrosion has been tested in a laboratory scale sewer model which includes a concrete surface. Traditionally two most practised methods are pH adjusted to >10.5 and ferrous chloride addition at [Fe2+]: [S2â] of 1-1.3:1. When the combined methods were tested in a laboratory scale sewer system, the amount of ferrous chloride required was only at [Fe2+]: [S2â] of 0.1:1 and pHâ¼8. Further experiments confirmed some oxygen in the water/air space is necessary to achieve an efficient reduction, but the oxygen present in the water (â¼1Â mg/L) of gravity sewer was found sufficient. This provides a cost-effective means of H2S reduction in the gaseous phase, although testing with real sewer is needed.
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Journal: International Biodeterioration & Biodegradation - Volume 124, October 2017, Pages 206-214