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ALL ASPECTS OF DRAINAGE REPAIRS UNDERTAKEN.

No job too big or too small...

Work undertaken for Local Authorities, Landlords and Private Customers.

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Our Work

 WRJ Groundworks  
 are d
rainage specialists
 c
overing Wales and  
 the borders.

Work undertaken for Local Authorities, Landlords and Private Customers.


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COMMERCIAL SEWAGE TREATMENT PLANTS


The majority of waste water drainage in the U.K. is provided by municipal sewage treatment works.  However, in some rural locations it is not uncommon to find that mains drainage in inaccessible and it’s the responsibility of the land owner to find an alternative method of waste water disposal.

Certain commercial applications such as pubs, hotels, theme parks, visitors centres and industrial units will require the installation of a ‘packaged sewage treatment plant’ to receive and treat the waste water.  These sewage treatment plants are typically designed to treat the sewage to such degree that the resulting ‘treated effluent’ is suitable for discharge to a natural watercourse or underground drainage field / soakaway.

Commercial sewage treatment plants typically contain primary settlement, biological treatment and final settlement zones.  They provide treatment for Biological Oxygen Demand (BOD), Suspended Solids (SS) and ammonia (NH4).  Some systems have an option of ‘add-on’ sand filters to provide further treatment before discharge.  The Environment Agency in England and Wales are responsible for setting the quality of effluent the treatment plant would need to meet, and this standard can vary on each application.

Applications where commercial catering takes place will generate significant volumes of grease and fat which should not be allowed to enter the sewage treatment plant.  In these applications a suitably sized grease trap should be installed upstream of the sewage treatment plant.















 















 













official installers in South Wales

Here we've installed a 100 person treatment plant, a UV sterilising tank plus a phosphorus tertiary tank. The reason for this trio of treatment systems is that they output into the nearby reservoir, so in order to get the application passed with National Resources Wales we had to make sure the effluent readings were to their standard.