Equipment Store

Sewage? The Solution

The discharge of raw sewage into the sea can create a health hazard. Sewage can also lead to oxygen depletion and can be an obvious visual pollution in coastal areas – a major problem for countries with tourist industries.

The main sources of human-produced sewage are land-based – such as municipal sewers or treatment plants. However, the discharge of sewage into the sea from ships also contributes to marine pollution.

Therefore, the regulations in Annex IV of MARPOL prohibit the discharge of sewage into the sea within a specified distance of the nearest land, unless the ships have in operation an approved sewage treatment system.

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Our Sewage treatment system are designed for the treatment and removal of bacterial pollution through an oxide/reduction process and to drastically reduce TSS, BOD5, COD, turbidity and the organic and physical pollutants in waste water produced on boat thanks to a fine purification system.

Treat the black water on your vessel with Blue Sea

The BLUE SEA system is a new generation wastewater purifier capable of treating from 2500-22000 litres a day.

The Blue Sea system is equipped to purify, macerate and sterilize all in accordance with the enforced norms regarding the discharge of wastewater into the sea.

In fact, a BLUE SEA marine wastewater treatment plant guarantees the elimination of bacterial pollution through an oxide/reduction process and, most of all, drastically reduces TSS, BOD5, COD, turbidity and the organic and physical pollutants in wastewater produced on a boat, thanks to the fine purification system.

Selmar BLUE SEA treated wastewater complies with the international regulation of “Marpol” environmental rules.

Selmar’s purification system is based off of an advanced oxidation-reduction process as well as being equipped with two units of U.V sterilization (primary and secondary), an air blower, oxygenation unit, flotation system, “cleaning/sanitation” unit and the advanced maceration/comminution stage. All of these stages and units together complete the marine sewage treatment plant and make it unique in its kind.

The “Advanced Oxidation Process (AOP)” uses a combined action of ozone, OH free radicals, ultraviolet rays and hydrogen peroxide, making it incredibly effective for black and grey wastewater treatment.

Selmar BLUE SEA Range Specs Tables

Models & Characteristics

Hydraulics: System Characteristics

Standard Features

•   Automatic cleaning system
•   Liquid oxidant tank
•   Electronic overflow
•   Mechanical overflow
•   Hour meter
•   Primary “U.V. STERILIZER” with control box
•   Air blower
•   Cycle counter
•   Mechanical sensor of minimum level for onboard sewage tank, with installation kit
•   Operator panel with LCD display for control and self-diagnostics

Accessories and Extras

•   Macerator booster pump
•   Seawater pump
•   Air filter (activated carbon)
•   U.V. sterilizer for post-secondary treatment
•   Remote control with LCD display
•   Siphons for the sewage water and seawater charging lines
•   Grease traps:
  • Mod. SEL 075/T
  • Mod. SEL 125/T
  • Mod. SEL 175/T
  • Mod. SEL 075/plus
  • Mod. SEL 125/plus
  • Mod. SEL 175/plus