Pollution Control


Grease Traps and Separators

 

Surface water drains normally discharge to a watercourse or indirectly into underground waters (groundwater) via a soakaway. Contamination of surface water by oil, chemicals or suspended solids can cause these discharges to have a serious impact on the receiving water.
The Environment Regulators, Environment Agency, England and Wales, SEPA, Scottish Environmental Protection Agency in Scotland and Department of Environment & Heritage in Northern Ireland, have published guidance on surface water disposal, which offers a range of means of dealing with pollution both at source and at the point of discharge from site (so called ‘end of pipe’ treatment). These techniques are known as ‘Sustainable Drainage Systems’ (SuDS).
Where run-off is draining from relatively low risk areas such as car-parks and non-operational areas, a source control approach, such as permeable surfaces or infiltration trenches, may offer a suitable means of treatment, removing the need for a separator.
Oil separators are installed on surface water drainage systems to protect receiving waters from pollution by oil, which may be present due to minor leaks from vehicles and plant, from accidental spillage.
Effluent from industrial processes and vehicle washing should normally be discharged to the foul sewer (subject to the approval of the sewerage undertaker) for further treatment at a municipal treatment works

 

 

 

Grease Traps

An effective and hygienic method of separating fat and grease from waste water flow.

Klargester grease traps will, by the removal of fat and grease:

  • Greatly reduce incidents of blocked drains from catering
  • establishments
  •  Improve the performance of septic tanks and field drains
  • Prevent contamination of small sewage treatment plants

Grease traps are designed for small restaurants, public houses and canteens.
 

Grease Separators:

For applications such as larger restaurants, hotels, etc. where a grease separator should be considered to give additional volume.


Operation & Installation


Traps and separators allow fats and grease to naturally separate out from water, allowing their removal prior to the wastewater reaching the drainage system.

The trap or separator should be installed close to the source of contamination before any foul waste can enter the drainage flow and to suit the expected liquid temperature.

For further information on this or any other Klargester product, please contact any of the numbers below.
 

Other Products
 

Klargester manufactures a wide range of pollution control equipment including:

  • BioDisc® Sewage Treatment Plants
  • AirFlow Sewage Treatment Plants
  • Sigma SuperSeptic
  •  HillMaster Package Pump Systems
  • Pumpstor24 Pumps Systems
  • Stormwater Attenuation Systems
  • Septic Tanks
  • Cesspools
  • Grease & Silt Traps
  • Oil/Water Separators
  • Silage Effluent Tanks
  • Reed Beds
  • Rainwater Harvesting
  • Garden Watering Systems

BioDisc® is a Registered Trademark of Klargester Environmental

Bypass Separator

Bypass separators are used when it is considered anacceptable risk not to provide full treatment, for very highflows, and are used, for example, where the risk of largespillage and heavy rainfall occurring at the same time is small, e.g.
 

  • Surface car parks
  • Roadways
  • Lightly contaminated commercial areas


Performance


Klargester were one of the first UK manufacturers to have separators tested to EN 858-1. Klargester have now added the NSBD bypass range to their portfolio of certified and tested models. The NSBD number denotes the maximum flow at which the separator treats liquids. The British Standards Institute (BSI) tested the required range of Klargester full retention separators and certified their performance in relation to their flow and process performance assessing the effluent qualities to the requirements of BS EN 858-1. Klargester bypass separator designs follow the parameters determined during the testing of the required range of bypass separators.


Each bypass separator design includes the necessary volume requirements for:

  • Oil separation capacity
  • Oil storage volume
  • Silt storage capacity
  • Coalescer


The unit is designed to treat 10% of peak flow. The calculated drainage areas served by each separator are indicated according to the formula given by PPG3 NSB = 0.0018A(m2).
Flows generated by higher rainfall rates will pass through part of the separator and bypass the main separation chamber.
Class I separators are designed to achieve a concentration of 5mg/litre of oil under standard test conditions. Class II separators are designed to achieve a concentration of 100mg/litre of oil under standard test conditions.


Features

  •  Light and easy to install
  • Class I and Class II designs
  • Inclusive of silt storage volume
  • Fitted inlet/outlet connectors
  • Vent points within necks
  • Oil alarm system available (required by BS EN 858-1 and PPG3)
  • Extension access shafts for deep inverts
  • Maintenance from ground level

To specify a nominal size Bypass Separator, the following information is needed:-

  • The calculated flow rate for the drainage area served.
  • Our designs are based on the assumption that any
  • interconnecting pipework fitted elsewhere on site does not
  • impede flow into or out of the separator and that the flow is
  • not pumped
  • The required discharge standard. This will decide whether a
  • Class I or Class II unit is required
  • The drain invert inlet depth
  • Pipework type, size and orientation

Full Retention Separator


Full Retention Separators are used in high risk spillage areas
such as:

  • Fuel distribution depots
  • Vehicle workshops
  • Scrap Yards


Performance


Klargester were the first UK manufacturer to have the required range (3-30 l/sec) certified to EN 858-1 in the UK. The NS number denotes the flow at which the separator operates. The British Standards Institute (BSI) have witnessed the performance tests of the required range of separators and have certified their performance, in relation to their flow and process performance to ensure that they met the effluent quality requirements of BS EN 858-1. Larger separator designs have been determined using the formulas extrapolated from the test range. Each Full Retention Separator design includes the necessary volume requirements for:

  • Oil separation capacity
  • Oil storage volume
  • Silt storage capacity
  • Coalescer (Class I units only)
  • Automatic closure device

Klargester Full Retention Separators treat the whole of the
specified flow.

Features

  • Light and easy to install
  • 3-30 l/sec range independently tested
  • and performance sampled, certified by the BSI
  • Class I and Class II designs
  • Inclusive of silt storage volume
  • Fitted inlet/outlet connectors
  • Oil alarm system available
  • Vent points within necks
  • Extension access shafts for deep inverts
  • Maintenance from ground level

To specify a nominal size Full Retention Separator, the following
information is needed:-

  • The calculated flow rate for the drainage area served. Our designs are based on the assumption that any interconnecting pipework fitted elsewhere on site does not impede flow into or out of the separator and that the influent is not pumped
  • The required discharge standard. This will decide whether a
  • Class I or Class II unit is required
  • The drain invert inlet depth
  • Pipework type, size and orientation
 

Washdown and Silt separator Range


This unit can be used in areas such as car wash and other
cleaning facilities that discharge directly into a foul drain, which
feeds to a municipal treatment facility.
If emulsifiers are present the discharge must not be allowed to
enter an NS Class I or Class II unit.

 

  • Car wash
  • Tool hire depots
  • Truck cleansing
  • Construction compounds cleansing points


Performance


Such wash down facilities must not be allowed to discharge directly into surface water but must be directed to a foul connection leading to a municipal treatment works as they utilise emulsifiers, soaps and detergents, which can dissolve and disperse the oils.

Features

 

  • Light and easy to install
  • Inclusive of silt storage volume
  • Fitted inlet/outlet connectors
  • Vent points within necks
  • Extension access shafts for deep inverts
  • Maintenance from ground level

 

Car Wash Slit Trap


 

Car Wash silt trap is designed for use before a separator in car
wash applications to ensure effective silt removal.


Features

 

  • Galvanised heavy duty cover
  • Light and easy to install
  • Maintenance from ground level

Forecourt Separator Range


The forecourt separator is designed for installation in petrol filling station forecourts and similar applications. The function of the separator is to intercept hydrocarbon pollutants such as petroleum and oil and prevent their entry to the drainage system, thus protecting the environment against hydrocarbon contaminated surface water run-off and gross spillage.


Performance


Operation ensures that the flow cannot exit the unit without first passing through the coalescer assembly.
In normal operation, the forecourt separator has sufficient capacity to provide storage for separated pollutants within the main
chamber, but is also able to contain up to 7,600 litres of pollutant
arising from the spillage of a fuel delivery tanker compartment on
the petrol forecourt. The separator has been designed to ensure
that oil cannot exit the separator in the event of a major spillage,
subsequently the separator should be emptied immediately.


Features

 

  • Light and easy to install
  • Inclusive of silt storage volume
  • Fitted inlet/outlet connectors
  • Vent points within necks
  • Extension access shafts for deep inverts
  •  Maintenance from ground level
  • Class I and Class II design
  • Oil storage volume
  • Coalescer (Class I unit only)
  • Automatic closure device
  • Oil alarm system available


Installation


The unit should be installed on a suitable concrete base slab and surrounded with a concrete backfill. Structural grade units can also be supplied suitable for installation within a granular backfill (i.e. pea gravel). Please specify unit required when ordering.
If the separator is to be installed within a trafficked area, then a suitable cover slab must be designed to ensure that loads are not transmitted to the unit.
The separator should be installed and vented in accordance with Health and Safety Guidance Note HS(G)41 for filling stations, subject to Local Authority requirements.

Alarm Systems


British European Standard BS EN 858-1 and Environment Agency Pollution Prevention Guideline PPG3 requires that all separators are to be fitted with an oil level alarm system and that it should be installed and calibrated by a suitably qualified technician so that it will respond to an alarm condition when the separator requires emptying.

 

  • Easily fitted to existing tanks
  • Excellent operational range
  • Visual and audible alarm
  • Additional telemetry option