Sewage Treatment Solutions

Desludging Sewage Treatment Solutions

How do you know if your Tricel septic tank or sewage treatment plant requires desludging or emptying? What to do before and after the desludging? This is what we will explain below.

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Sewage Treatment Solutions

Desludge septic tanks and wastewater treatment plants

Overview

Septic tanks as well as wastewater treatment plants all require desludging at some points. It’s necessary to ensure your wastewater treatment system keeps on working without any issues and to prevent failures and pollution.

Forewords

  • The de-sludging of the Tricel Novo wastewater treatment plant or Tricel Vento septic tank is the responsibility of the homeowner.
  • There is the potential danger of falling into the tank during de-sludging when manholes may be opened – take all necessary safety precautions when de-sludging.
  • The access cover should never be left off unattended.
  • Tricel recommends the use of a licensed company to carry out the de-sludging should be done with a vacuum tanker.
  • The property owner has a legal responsibility to ensure that the system does not cause pollution, a health hazard or nuisance.

 

Choose your wastewater treatment system:

  • Tricel Novo sewage treatment plant
  • Tricel Vento septic tank
  • Tricel Puraflo packaged filter system

Desludging: Tricel Novo sewage treatment plant

​When should you desludge your sewage treatment plant? Checking the level of sludge.

When the sludge is occupying 50% of the volume of the primary chamber de-sludging is required, this is necessary when the sludge is 700mm deep.

We would recommend you book a yearly service/maintenance during which the technician will check the sludge level and advise whether desludging if needed or not. To book a service for your Tricel wastewater treatment solution, please contact us and we will refer you to one of our installers/maintenance companies.

 

The ground

Do not allow machinery/traffic drive over the plant. Maintain a distance of at least 4 metres away from the covers of the Tricel Novo.

 

The access

For the Novo sewage treatment plants, the access for desludging is through the desludging access cover (see below). The section of the tank to empty is the primary settlement chamber. Note that in normal operation there is no need to empty the aeration chamber or the final settlement chamber.

The steps are as follows:

  • Remove the de-sludging access covers.
  • Empty the Tricel Novo using a vacuum tanker. Ensure the removal of the solids with the liquid.
  • Take care not to damage the Tricel Novo with the hose of the vacuum tanker.
  • Replace the de-sludging access cover securely.

 

Notes:

  • There is the potential danger of falling into the tank during de-sludging when manholes may be opened – take all necessary safety precautions when de-sludging.
  • The access cover should never be left off an unattended Tricel Novo.

 

Should the air blower be turned off during desludging?

No, there is no need to turn the air blower off during the desludging of the Tricel Novo.

 

What to do after desludging?

After emptying a Tricel Novo wastewater treatment plant, the primary settlement chamber must be filled back with water immediately until level with the aeration chamber.

 

What’s the frequency of desludging?

When the sludge is occupying 50% of the volume of the primary chamber desludging is required, this is necessary when the sludge is 700mm deep. For de-sludging periods, which depend on the occupancy of the dwelling, please refer to the table in section 3.1 ‘Dimensions’ in the manual. Carry out de-sludging with a vacuum tanker (Tricel recommends the use of a licensed company).

Please note that regular maintenance is also part of looking after your sewage treatment plant, check our Tricel Novo manual to see what is the recommended regular and annual maintenance.

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Desludging: Tricel Vento septic tank

When should you desludge your septic tank? Checking the level of sludge.

Desludging of the Tricel Vento is recommended on a yearly basis. It is done to prevent solids rising to the height of the outlet pipe and being carried along with the liquid into the percolation trenches. This, in turn, can block the percolation area and can cause flooding.

 

The ground

Do not let this equipment drive over the tank. Maintain a distance of at least 4 meters away from the covers of the tank.

 

The access

During the desludging or the septic tank emptying, both chamber 1 and chamber 2 should be emptied.

Steps to follow:

  • Remove both access covers.
  • Remove the filter.
  • Empty the Tricel Vento septic tank using a vacuum tanker. Care must be taken not to damage the tank with the hose of the vacuum tanker.
  • Ensure that all the solids are removed from the tank.
  • Replace the de-sludging access cover securely.

The filter of the septic tank also needs to be washed when removed during desludging.

Notes:

  • The access cover should never be left off while the unit is unattended.
  • De-sludging should never be carried out alone.

 

What to do after desludging

The septic tank/primary chamber must be refilled with fresh water after desludging.

 

What is the frequency of desludging a septic tank Tricel Vento

Desludging is recommended on a yearly basis. Depending on usage and house population, this period may vary. The minimum recommended desludging period is 1 year for all tank sizes.

For more information about the Tricel Vento septic tank, you can download the manual.

Puraflo maintenance

The Tricel Puraflo modules do not require “desludging” as such as the system is placed following a septic tank or wastewater treatment unit where the sludge would be kept. However, to ensure that the Tricel Puraflo system performs effectively, the septic tank/wastewater treatment plant must receive regular maintenance.

CASE study

Tricel puraflo

Installation with a septic tank + Tricel Puraflo

During the de-sludging of the septic tank, the effluent filter at the outlet of the septic tank should be removed from its housing and hosed down to remove any materials which may result in blockage (secondary treatment only).

The Puraflo, like any other system, does require some maintenance, we recommend an annual service.

To book a service, contact us & we will refer you to one of our installers/maintenance companies.

If you would like more information about the Puraflo, please check out the Puraflo Operation and Maintenance Manual.

Operation and Maintenance Manual

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Get in touch

Tricel Environment UK

A trading brand of Dewey Waters Ltd.
Heritage Works, Winterstoke Road, Weston-super-Mare, BS24 9AN, United Kingdom.
Tel: +44 (0)1934 422 311