Tanks for Diesel oil (DO) or Lubrication oil (LO) are liable to contamination by bacteria, yeasts, fungi and algae, every time the tank is ventilated or refilled. In some acute cases the tank itself has been found to be a veritable source of these cultures. Micro-organisms survive, grow and multiply in the water phase which develop during storage and transportation, particularly when damp air inside the tank condensates.
Microbiological contamination can have very serious consequences. The by-products of micro-biological metabolism block filter elements, diesel and oil pipes, water separators and injection pumps. The material of the tank walls can also be severely damaged. Corrosion is further accelerated by water-soluble salts (a common place situation with us, here in Malta) and hydrogen sulphide (H?S), which is a by-product of the micro-biological activity.

Micro-organisms are known to survive in water concentrations higher than 60ppm. The higher the water content in the oil, the more likely it is to become infected, hence resulting in a greater threat to the functionality and material of the tank, pipelines, as well as the drive units. Water concentration is the decisive factor for micro-organism growth and accordingly any strategy aimed at combating DO pest must start by reducing the water content in the medium. This can be achieved by implementing continuous oil treatment to prevent the water content from rising above 60ppm.

An effective and lasting method of protecting fuel and lubricants against increasing water concentrations, and thus against contamination by micro-organisms, is the solution offered by our partners through a Single or Multistage Fuel Treatment System.

For all the most common contaminations in these media, including solid and suspended particles as well as water, these systems represent the most efficient and cost-effective solution. To treat the first phase, a number of combined filter coalescers with varying degrees of fineness is proposed; these systems can be optimally adapted to meet specific requirements and technical configurations. An optional downstream separator membrane can be used to reduce the water content down to 20 ppm unbound water in order to prevent growth of micro-organisms. To treat heavy contamination with solids a dual-phase version of the filter coalescer is proposed. This version has an upstream filter that can be exchanged independently.

Our Fuel and Oil Treatment systems provide for a wide range of flow capacities. The systems consist of a pump with a downstream depth filter or filter coalescer and an optional permanent separator as well as a central control box, full differential pressure monitoring system, and an automatic water outlet system.

The systems are designed with due consideration of the client’s available space.

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