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Percolation and Tertiary Treatment

Services —›

 

Tertiary Systems

Local Authorities may specify higher effluent quality levels in specific circumstances. Tertiary treatment is used as a means to treat wastewater to high quality prior to discharge to a sensitive area or water course. We at Molloy Precast are delighted to design, manufacture and install solutions for such circumstances. We have developed a range of design solutions.

Sand Filters
 

A sand filter consists of several layers of graded sand. Wastewater is distributed evenly over the filter's surface. It then percolates through the sand, where it is treated by a biofilm within the system. The effluent from the system will be clarified to the required standard. Molloy Precast provide the following services:

  • A system designed to suit your needs
  • Systems can be housed in one of our precast tanks or in an in-situ built tank
  • Specially designed 4” distribution pipes
  • Sand filters can be used in conjunction with the Aswaflow wastewater treatment system
  • Delivery and/or installation of sand filters is available throughout the country.


Reed Beds
 

A sand filter consists of several layers of graded sand. Wastewater is distributed evenly over the filter's surface. It then percolates through the sand, where it is treated by a biofilm within the system. The effluent from the system will be clarified to the required standard. Molloy Precast provide the following services:


  • A system designed to suit your needs
  • Systems can be housed in one of our precast tanks or in an in-situ built tank
  • Reed beds can be used in conjunction with the AswaFlow wastewater treatment system


Sterilisation Units
 

Sterilisation usually consists of UV light treatment of the treated effluent prior to discharge to a water course or to a percolation area in a sensitive area. This will reduce the pathogen content of the effluent. Molloy Precast provides the following services:

  • A system designed to suit your needs
  • System can be incorporated into the Aswaflow wastewater treatment system


 

Sizing

Each system is designed to be site specific. Size and layouts are dependent on the occupancy of the dwelling and the effluent quality. We have standard systems for different sizes; however, our team would be happy to design and manufacture kits to suit your site with regard to size and layout. We also offer an installation service.

Further Information

Generic drawings are available. Site specific drawings can also be prepared on request. For further information do not hesitate to contact our design team. We would also strongly recommend a visit to our interactive training and display facility where you can see exactly how a tertiary treatment unit is constructed and operates.