W?rtsil? Retrofit Sewage Treatment Plant

Widely regarded as standard specification by many of the world’s shipowners, the Wärtsilä Super Trident sewage treatment plant is the cost effective, safe answer to disposal of wastewater at sea.

Due to the modular design, no hull penetration is required as separated units can be transported through standard vessel access ways, and there is minimum maintanance required.

The plant ensures compliance to IMO legislation – MEPC.227(64)

REPLACEMENT UNITS – LEGISLATION

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.

EASE OF INSTALLATION

The retrofit range has been specifically designed to reduce the cost of installing sewage treatment equipment into existing vessels.

Assembled Unit

Separated Unit

STANDARD FEATURES

IMO & MED certified
Modular construction
Single power supply input point
Minimal maintenance requirement
Solids handling Wärtsilä centrifugal discharge pump

OPTIONAL FEATURES

Standby compressor
Standby discharge pump

BENEFITS

Compatible with fresh and salt water and conventional or vacuum fed collection system
Modular construction (3 modules, easy to install)

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.

Wärtsilä Water Systems has more than 40 years of experience in delivering Sewage Treatment Plants for the Marine industry

Asian Hercules II

“Asian Hercules II”, a 3,200 MT Floating Sheerleg Crane vessel, has 4 main hoisting winches, each capable of hoisting speeds 2m/min with a full load. Delivered in 1997, the vessel has an accommodation facility for 34 persons.

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Asian Hercules II
Twister

The W?rtsil? AQUARIUS? UV Ballast Water Management System (BWMS) was installed onboard the Twister, a Chemgas BV owned LPG carrier.

For retrofit applications and upgrades, where space availability can be a determining factor, the modular configuration of W?rtsil?’s AQUARIUS? range was a particular advantage and the entire installation process took just 3 weeks.

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Twister
Leonidas

Delivered in 2009, the 318,000 dwt Leonidas features a machinery installation incorporating a W?rtsil? 7RT-flex82T. The vessel is also equipped with the Super Trident Sewage Treatment Plant ST2A, certified to meet IMO MEPC 159(55) guidelines.

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Leonidas
Ullswater

The vessel, a W?rtsil? Ship Design, is to perform diving support, subsea construction work, crane lifting and ROV operations.

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Ullswater

Brochures

Brochure: Retrofit Sewage Treatment Plant

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Brochure: Small Sewage Treatment Plant

Download (PDF)

Brochure: Large Sewage Treatment Plant

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Wärtsilä Water Systems

Wärtsilä is the world’s leading manufacturer of marine sewage treatment systems. For over four decades the Wärtsilä Super Trident sewage treatment plant has been widely regarded as standard specification on all types of vessels and has been designed to meet existing and future IMO standards.

Contact us

Please fill in the form, we aim to respond within 1-2 business days depending on the enquiry. For an existing installation, provide all necessary details to identify the installation and the equipment. Fields indicated with an asterisk (*) are required.

Find your local Wärtsilä office here

For SPARE PARTS, please e-mail us with the Equipment Serial Number or the name of the vessel at pse@wartsila.com. For urgent support, contact +44 7795 442 623.

For TECHNICAL SUPPORT & SERVICE, please email us with the Equipment Serial Number or the name of the vessel at poole.service@wartsila.com. For urgent support, contact +44 7917 630 374.

Equipment Serial Number is taken from the equipment nameplate and includes all letters and numbers as given on the equipment nameplate.

W?rtsil? Retrofit Sewage Treatment Plant

REPLACEMENT UNITS – LEGISLATION

EASE OF INSTALLATION

STANDARD FEATURES

OPTIONAL FEATURES

BENEFITS

Asian Hercules II

Twister

Leonidas

Ullswater

Brochures

Brochure: Retrofit Sewage Treatment Plant

Brochure: Small Sewage Treatment Plant

Brochure: Large Sewage Treatment Plant

Wärtsilä Water Systems

Contact us

About Wärtsilä