Hamworthy sewage treatment plants (STPs)

Hamworthy sewage treatment plants or units | certified IMO MEPC 227(64) | low maintenace

Hamworthy sewage treatment plants (STPs) are a standard in the marine & offshore market. The Hamworthy STP is known to be the most cost-effective and safe answer for processing wastewater at sea. No tempering with our oceans' quality, operating in full compliance with IMO MEPC 227(64) and other stringent guidelines.

Each Hamworthy sewage treatment unit is optimised for processing onboard black and grey wastewater streams. The plants are compatible with both conventional gravity and vacuum fed collection systems. They can be operated with salt and freshwater. Each STP is fully automated, allowing for unattended and flexible operation. On-board maintenance requirements are reduced and long-term operating costs are significantly lowered.

Hamworthy sewage treatment plants are compact and modular in design, suitable for between-deck installation and adaptable to the customer's new-build specifications. Produced by Wärtsilä Water & Waste.

    KEY BENEFITS

    Benefits of Hamworthy sewage treatment plants

    • Made by the market leader, with over half a century of experience
    • Proven effluent quality: clean and safe effluent, suitable for discharging overboard
    • Low OPEX:
      • minimal maintenance & spare parts required
      • minimal human intervention during operation
      • Compatible with gravity and vacuum collection systems, sea- and freshwater
      • Highly flexible in operation thanks to automatic control system

    FEATURES

    Main features

    • IMO 227(64) & MED certified
    • Single power supply input point
    • Solids handling centrifugal discharge pump
    • Chemical disinfection and de-chlorination
    • Automatic control
    • Simple & robust construction, made from top quality components
    • Compact design with collecting tank as integral part of STP

    Models

    Hamworthy STC-13 line (small capacities)

    SystemIMO certified
    (litres/day)
    Dimensions
    (LxWxH in mm)
    Weight full
    (kg)
    STC-01-1317401890140011811550
    STC-02-1331202518186313363030
    STC-03-1346602622186316813959
    STC-04-1360102722208018215027
    STC-06-1393603072228019717367

    Hamworthy STC-14 line (large capacities)

    SystemIMO certified
    (litres/day)
    Dimensions
    (LxWxH in mm)
    Weight full
    (kg) 
    STC-08-14118403000267020009294
    STC-10-141581034002750200011314
    STC-13-142083044002750200015036
    STC-15-142570437003215230017836
    STC-20-143397446203215230022422
    STC-25-144077846203490250027446
    STC-30-144742250123470270030898
    STC-40-146415060123915268043614
    STC-50-148018270004145290055526
    STC-60-1410080070004180350069754

    SCOPE OF SUPPLY

    As standard

    • Main tank
    • Air compressor
    • Discharge pump
    • Electrical control panel
    • Chlorination & dechlorination systems

    Optional

    • Fitted vacuum sewage collection equipment
    • Conditioning water flow meter
    • Standby compressor (mounted)
    • Standby discharge pump (mounted)
    • Maceration
    • Separate sewage feed system
    • Retrofit options available to aid installation

    After-sales support

    Hamworthy SPTs are fully supported throughout their lifecycle. Owners and operators can count on:

    All Hamworthy sewage treatment units are commissioned by qualified commissioning engineers.

    Automation of Wärtsilä Waste and Wastewater treatment systems

    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 1202 662 634.

    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 1202 662 616.

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