Sulphide

Sulphide (or sulfide) is an inorganic anion of sulphur and when dissolved in water, can be very aggressive and lead to corrosion. They can also lead to odour issues.

 

In the wastewater industry, sulphides can be measured online to monitor odour issues or as an early warning measurement in sewers. In sewers, the presence of sulphide can lead to sulphuric acid generation which can damage the sewer infrastructure.

 

The most common method for determining sulphide concentration is colorimetry as this has a low detection limit.  In sewer networks or at a wastewater treatment works, a better approach is often the use of UV spectroscopy as the sensor can be dipped directly in the medium and does not consume reagents.

 

In the oil and gas industry, sulphides are measured to define the concentration of sulphide in ‘sour water’ prior and after removal via stripping.

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An industrial colorimeter for sulphide measurement in the oil and gas industry

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An online UV spectrophotometer for sulfide measurement in wastewater applications

Here are some related articles

Sulphide measurement in sewers

Protect your wastewater assets with an H2S control system.

Sulphide builds up in sewers is a serious issue for water utilities. Aside from the noxious smell associated with the generation of hydrogen sulphide (H2S) which may upset local communities.

Controlling odour and H2S in wastewater treatment works

In this case study, a wastewater treatment works monitored sulphide at the inlet of their works to optimise dosing of odour control chemicals and minimise H2S issues.

 

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