Retrofit sewage treatment plant.

Retrofit sewage treatment plant system for marine wastewater management.

Wastewater retrofit systems built for easier installation.

When upgrading or retrofitting your engine room, the RTC retrofit sewage treatment plants are the most convenient solution available to the marine world today. A 3-piece modular design allows for extremely easy installation. The RTC retrofit sewage treatment plants can easily be boarded through standard vessel access ways thanks to their modular design. Three separate modules with limited dimensions prevent the need for hull penetration.


Widely regarded as standard specification by many of the world’s shipowners, the Super Trident® RTC retrofit sewage treatment plants form the most cost effective and safe answer to disposal of wastewater at sea.


The plant ensures compliance to IMO legislation – MEPC.227(64). Minimum maintenance is required.

Why operators choose retrofit STPs:

Compatible with fresh and salt water.
Compatible with both conventional and vacuum fed collection systems.
Modular construction: 3 modules, easy to install.
The most cost-effective option when retrofitting or upgrading machine rooms
Certified to meet IMO MEPC 227(64) effluent quality standards.

Retrofit STP system range:.

Each size in the retrofit range is built up from three separate water tight tanks connected by external piping, aiding installation. The dimensions of each component has been arranged to permit its transportation through standard vessel access ways.

The dimensions below indicate the size of aperture through which the unit will pass with tanks separated when the control panel, transfer tubes and studs, dosing skid, vent tubes, flow meter and covers are also removed.

System
RTC20-14
RTC40-14
RTC60-14
RTC80-14
IMO certified
(litres/day)
3120
6010
9360
11840
Weight full
(kg)
3335
5340
7690
9440
Dimensions when assembled
(LxWxH, mm)
2320x1678x1398
2520x1835x1847
3010x2035x1937
3460x3324x2037

System
RTC20-14
RTC40-14
RTC60-14
RTC80-14
Aperture width
(needed for boarding, mm)
655
730
830
880
Aperture length
(needed for boarding, mm)
1220
1670
1770
1870

What’s included as standard:

As standard:
Main tank.
Air compressor.
Centrifugal discharge pump (for solids handling).
Electrical control panel.
Chlorination & dechlorination systems
Optional:
Standby compressor.
Standby discharge pump.
0
1
2
3
4
5

Designed to reduce retrofit complexity.

The retrofit range has been specifically designed to reduce the cost of installing sewage treatment equipment into existing vessels.
Each size in the retrofit range is built up from three separate water tight tanks connected by external piping, aiding installation. The dimensions of each component has been arranged to permit its transportation through standard vessel access ways.

Assembled unit:
Assembled retrofit sewage treatment plant unit for marine wastewater management.
Separated unit:
Separated retrofit sewage treatment plant units for marine wastewater processing.

Built for current wastewater regulations.

Sewage Treatment Plants installed on or after 1st January 2016 are required to meet the new IMO Annex IV, MEPC 227(64) effluent quality standards, which introduce a Dilution Compensation Factor into the sampling requirements.


Dilution should not be the solution to pollution. IMO intended to tackle ‘dilution machines’ by the introduction of Dilution Compensation Factor (Qi/Qe) in MEPC.227(64). If the volume of the effluent is higher than the volume of the influent due to the use of dilution, the quality of the effluent must be improved by the same factor. Installing an STP that relies solely on dilution will leave ship operators with some difficult questions to answer, even if the STP is type approved. Therefore, for STPs where Qi/Qe <1, it is important that Qi and Qe can be measured and visible.

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