Selecting inappropriate oil-in-water monitoring technologies can jeopardise environmental compliance, according leading smart water quality monitoring specialist, Rivertrace.
Its latest expert advice to ship owners confronted with a choice between several different sensor technologies suited to specific applications has now been published in a new white paper.
Oil-in-water monitoring on ships is needed to comply with MARPOL measures for the prevention of oil pollution, as well as in several other areas.
Stringent measures governing oil pollution require that if monitoring is not effective, discharges cannot be carried out – providing a significant operational incentive for ship owners to select the right technologies.
“Oil-in-water monitoring is used in a wide array of marine and industrial applications and it is crucial that operators know which technology is the most appropriate for their purposes,” says Mike Coomber, managing director of Rivertrace.
“Our foundation in research and development across all these solutions means we can offer a balanced view based entirely on customer needs.”
Ship owners have four optical technologies to choose from:
Scattered light monitoring
This measures the amount of light that is scattered by oil particles in water to measure oil content. This is a well-proven, robust, and cost-effective sensor technology that is deployed in multiple solutions, including those monitoring oil in bilge water or ballast water discharge.
These measure oil concentration based on the principle that different particles absorb light of different wavelengths. Monitors use multiple wavelengths to identify solids and oil particles. The technology is particularly effective where oil types are not known and works well even with turbid water. It has often been used in offshore production facilities.
These identify the presence of a specific oil type by measuring the light that particles give off when exposed to light of a particular wavelength. This technology is ideal when very low concentrations need to be detected, such as monitoring scrubber wash water discharge.
This uses the size and number of particles to visually identify oil concentration. Images from a high-speed camera are analyzed against a predefined library, which can distinguish between oil, gas and solids. This technology is useful when dealing with unknown oil types and does not require calibration. It is well suited to monitoring oily water discharge from ships.
Rivertrace’s expertise is underpinned by an internal research and development team dedicated to continually developing its existing products.
Its engineers can draw on experience gathered from more than 30,000 monitors and systems installed worldwide, as well as working with a client list that includes leading separator manufacturers and many leading shipping, offshore oil and gas and land-based industrial companies.
You can download the white paper by going to: https://bit.ly/3d3JAk6