Monitoring the Startup of a Sacrificial Concrete Sewer for Odor Control

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Abstract

The use of a sacrificial concrete sewer for controlling sulphide-related odour downstream of a pressure sewer was investigated in this study. The investigated sewer is located in a rural catchment and is intended to alleviate odour problems downstream of a small diameter pressure sewer with extended retention time. For the purpose of the study, a 50-m long sacrificial concrete gravity sewer was constructed using a high alkalinity concrete pipe. The monitoring campaign reported in this paper covers the first 9 months of operation. The results clearly demonstrate the ability of the system to reduce hydrogen sulphide gas (H2S (g)) concentrations in the sewer headspace. After being in operation for approximately half a year, the system was able to maintain average H2S (g) levels of less than 1 ppmv at the downstream end, which is the first place air can escape. The daily maximum H2S (g) levels (95 percentile) were reduced from several hundred ppmv in the discharge manhole to approximately 10 ppmv at the downstream end. Thus, the odour potential has been significantly reduced. A visual inspection of the system revealed that even after 9 months of operation not all of the concrete surfaces were corroding. The removal efficiency is therefore expected to increase further.
OriginalsprogEngelsk
TitelProceedings of the 13th International Conference on Urban Drainage
Antal sider8
UdgivelsesstedSarawak, Malaysia
ForlagThe International Conference on Urban Drainage
Publikationsdato2014
StatusUdgivet - 2014
BegivenhedThe International Conference on Urban Drainage - Borneo Convention Centre Kuching (BCCK), Sarawak, Malaysian Borneo, Kuching, Malaysia
Varighed: 7 sep. 201412 sep. 2014
Konferencens nummer: 13

Konference

KonferenceThe International Conference on Urban Drainage
Nummer13
LokationBorneo Convention Centre Kuching (BCCK), Sarawak, Malaysian Borneo
Land/OmrådeMalaysia
ByKuching
Periode07/09/201412/09/2014

Bibliografisk note

Proceedings published on a usb.

Emneord

  • Concrete corrosion
  • Odour
  • Sewer

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