HPDD 120-600 Commercial Sewage Treatment Plant

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  • HPDD 120-600 Commercial Sewage Treatment Plant product image
Structural Stability
Flexibility in Product Design
Reliable Bio Media System
Safe & Easy Maintenance
Low Noise Impact
Adjustable Turret Invert
Designed in accordance with EN12255: 2002 standard
Fully secure pedestrian duty manhole covers
Flat Base for stability
  • Description

    Range of 12-Sided Dodecagon shaped Large Commercial Sewage Treatment Plants

    Harlequin HPDD 120-600 range of Large Commercial Treatment Plants, designed in accordance with EN12255: 2002 standard, specifically deliver an industry-leading effluent quality required for the safe discharge of sewage for projects with a population equivalent of 120-600. Manufactured from Sheet Moulding Compound (SMC) these industry-leading systems are structurally strong. Flexibility in product sizing allows for the system to be tailor-made to suit individual project specifications.

    Low noise impact, safe & easy maintenance, unique bio media system, 10-year extended warranty, external blower housing unit, fully secured non-obtrusive manhole covers, and flat base for stability are amongst the key features that make these biological aeration treatment plants best suited for a wide range of commercial applications including caravan parks, hotels, commercial building sites, retail stores, camp sites, cafes, restaurants, schools, garden centres etc…

    A blower kiosk unit containing linear diaphragm pumps / side channel blowers, alarms, airline hose, and electrical connections is included.

    Plants with population above 300 will be specifically customised to your requirements.

  • Product Specification
    HPDD 120-600HPDD-120HPDD-140HPDD-160HPDD-180HPDD-200HPDD-220HPDD-240HPDD-260HPDD-280HPDD-300
    Population ServedUpto 120121-140141-160161-180181-200201-220221-240241-260261-280281-300
    Inlet Invert (mm)900900900900900900900900900900
    Outlet Invert (mm)975975975975975975975975975975
    Power Requirements (KWhr/Day)17.319.421.622.825.930.232.434.636.738.9
    Length (m) 13.313.3
    Width (mm)2720272027202720272027202720272027202720
    Height (mm)3270327032703270327032703270327032703270
    Unit Weight (Kg)2180251027102810310033003390381041304220
    No of Turrets4555555677
    Cover Sizes (mm)600x600600x600600x600600x600600x600600x600600x600600x600600x600600x600


    • Manufactured using Sheet Moulding Compound (SMC) material ensuring structural stability
    • Moving Bed Biofilm Reactor (MBBR) system ensures there is no fixed media, eliminating blockages
    • Low noise impact when installed correctly
    • Ground level unobtrusive large manhole covers providing easy access
    • 10-Year Extended Warranty
    • 12-month service period reduces operating costs
    • Mechanically reliable with very few moving parts within the tank
    • Designed in accordance with EN12255: 2002 design & testing standard
    • Adjustable turret invert depth in accordance with our guidelines
    • Designed to exceed standard effluent quality of 20 mg/l B.O.D., 30 mg/l Suspended Solids and 20 mg/l Ammonical Nitrogen
  • Key Benefits

    Structural Stability – Sheet Moulding Compound (SMC) panels ensure that these systems have the structural stability to be able to treat large quantities of wastewater from commercial establishments. SMC panels also means the tanks are tougher and sturdier than those made with GRP / Fibreglass.

    Flexibility in Product Sizing – The SMC manufacturing technique allows significant flexibility in product sizing. We offer a few basic sizes but bespoke sizes are available to suit individual project requirements.

    Unique MBBR System – Unique Moving Bed Biofilm Reactor (MBBR) system maximises bacterial growth with no fixed media eliminating system blockages.

    Safe & Easy Maintenance – The tanks have very few mechanical moving parts or electrical components within the plant allowing for safe and easy maintenance.

    Exceeds Standard Effluent Quality – These systems are designed to treat domestic sewage to designed to exceed standard effluent quality of 20 mg/l B.O.D., 30 mg/l Suspended Solids and 20 mg/l Ammonical Nitrogen.

    Flat Base for Stability – The tanks have been designed with a flat base for stability during transportation and storage prior to installation.

    Pedestrian Duty Manhole Covers – The tanks come fitted with multiple fully secure unobtrusive pedestrian duty manhole covers. The number of covers depend on the size of the tank to allow for easy access to each chamber.

    Adjustable Turret Invert Depth – Turret invert depth can be increased with riser kits to a maximum of 1.7m / 2 risers.

    External Blower Housing – All systems come equipped with an external blower housing allowing for safe and easy maintenance.

    Low Noise Impact – Extremely quiet pumps / blowers help minimise noise impact when installed in accordance with manufacturers instructions.

    Fine Bubble Diffusers – The bacteria receive a continuous air supply and are mixed and aerated by high volume fine bubble diffusers.

    Multiple Aeration Chambers – Harlequin commercial sewage treatment tanks are manufactured with multiple aeration chambers fitted with access turret / lid.

    10-Year Extended Warranty – All tanks come with a 10-year extended warranty only if registered.

    Site Visit and Commissioning – This is standard with all plants. Commissioning only verifies that the plant is set up correctly and does not carry out any other inspections or remedial works.



  • Downloads
    HPDD 120-600 Specification Sheet
    HPDD 120-600 Product Drawing
    Commercial Sewage Treatment Plants Brochure
    Commercial Sewage Treatment Plant Installation Guide

Make an enquiry about HPDD 120-600 Commercial Sewage Treatment Plant

To enquire about the HPDD 120-600 Commercial Sewage Treatment Plant please complete the short form, or call us on +44 28 9261 1077.

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