Ballast Water Treatment

Cathelco Ballast Water Treatment Systems…from a company that understands the shipping industry

The Cathelco BWT system has a number of unique features that enhance its effectiveness and reliability. View the animation and see how Cathelco have used their experience of the shipping industry to design a system which is efficient, compact and easily installed on a wide range of vessels.

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A choice of filter units

Cathelco offer the choice of two types of filters to remove larger organisms and particles from the ballast water. Both of the filters are made by well established, high quality European manufacturers. The filter units are available in capacities from 50m3/hr to 1,200 m3/hr with 40 micron screen mesh.

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UV technology with innovative features

Cathelco’s achievement is in developing a BWT system which fully exploits the advantages of UV technology.
  • Twin UV lamps in each chamber to render organisms, bacteria and pathogens harmless.
  • Each chamber can treat up to 200m3/hr of seawater.
  • Water travels in ‘helix’ to maximise exposure.
  • Available for single installation or in series via manifolds.

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Automatic adjustment to different water qualities

The amount of turbidity (suspended solids) in the seawater has a direct effect on the efficiency of the UV treatment process. For this reason, the Cathelco BWT system constantly measures the UV transmittance of the water in front of the UV chamber, allowing for automatic adjustments to differing water qualities.

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Control System

The control system can be accessed in a number of ways according to the size of the vessel and customer preferences.

  • Control interface located on the control panel.
  • Remote control interface, allowing access to the control panel from a more convenient location.
  • Fully integrated with the ship’s computer systems with mimic screens using part of the vessel’s management system.

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We support:

medicos sem fronteiras pq actionaid pq


Cathelco do Brasil is a company of Workship group.

We offer different packages for repairs and periodical monitoring of cathodic protection and antifouling systems with technical and commercial support from Cathelco in Brazil.
Workship do Brasil has an agile and flexible structure, able to offer fast and creative solutions to customers.

logo autronica

With great pride we informed the market that our company was qualified as distributor of Autronica in Brazil. We offer local stock for immediate delivery of various types of smoke, gas and flame detectors, communication interfaces and other products, as well as qualified technical assistance and certified by Autronica for on-board ship and platform services with all the necessary certificates.

logo merus

MERUS water treatment without chemical against corrosion and limescale.

logo nrg marine

Workship brought to Brazil the ultrasonic technology to combat barnaches in the hulls of vessels.
NRG Marine is an English manufacturer with international recognition.
After the quick installation of our product, there is a 99% reduction of the fouling in the submerged hull.
The product is quickly installed inside the vessel, no requiring penetration of the hull.
There are more than 10,000 vessels in the world that use this system, with total satisfaction.

WorkShip of Brazil Technical Services

Workship is a company developed to high level Technical services and spare parts supply, following International standards.

Its administration method is the total client satisfaction, commitment to results and the safety of all involved parts. By representing some of the bigger worldwide naval makers, it is proved the responsibility and liability level of Workship.

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