Septic Tank, Cess Pool and Sewage Waste Removal and Treatment Plant Installation and Servicing

Small tanker on septic waste  removal at threlfalls  June 2010 005

We offer  innovative solutions to sewage waste removal and treatment plant installation and maintenance.

As a licensed waste carrier our work is undertaken to the highest environmental standards.

Sewage receptors require regular emptying due to the build-up of sludge which must be removed and disposed of in accordance with stringent environmental legislation.

How often do I need to empty my tank?

This is a question asked very frequently. It all  depends on whether you have a septic tank or a cesspit, which we determine below.

Subject to your tanks location we can offer you one of two removal services being ‘standard’ or ‘environmentally friendly’:

  • The first is the standard practice of removing the full content of your tank (water and wiffy sludge). This process leaves you with a completely empty tank which is visually satisfying but in truth it renders the tank inefficient for some three months thereafter as it needs to rebuild the bacterium required to break down new solids. To date this is the only facility offered to the large majority of UK clients which leads us to the alternative;
  • The pioneering environmentally friendly process allows us to solely remove the wiffy sludge leaving the bacteria fuelled water in your water treatment plant which enables the plant to continue working at 100% efficiency from the point of removal. Contrary to what you may think this is a good thing and you are not being hoodwinked. The efficiency discussed eradicates the discharge of impure effluent through the plant’s soak away outlet during its rebuilding process which is what happens after the standard empty. Our process is better for your systems efficiency, your immediate environment and lastly but not least can offer you a welcome cost reduction, which increases dramatically in the event you are able to introduce a community syndicate that allows our vehicle to share the site attendance journey cost. Unlike current waste removal lorries that can only service 1 or 2 tanks before having to invariably make a lengthy journey to dispose of your waste, our mobile de-watering vehicles have the ability to service 30 to 40 tanks in one area before having to leave site for waste disposal. Through our practice our vehicle movement delivers additional community sustainability.

The difference between a septic tank and a cesspit

  • Septic tanks – to work efficiently the sludge (solids) needs to be removed once a year. However, actual frequency depends on the size of your property and the number of occupants.
  • Cesspits – emptying is likely to be at least twice a year. Frequency will depend not only upon the size of the tank, the size of the property and the level of occupancy but also other factors such as are appliances (washing machines and dishwashers) discharging to the tank?

A cesspit/cesspool is an underground tank that stores sewage until the time of disposal. A cesspool will have an inlet pipe but no outlet. Older cesspools are constructed of brick, while modern ones are made of fibreglass. They are watertight to prevent the leakage of foul water or the ingress of groundwater.

Problems that may arise:

Overflow cesspools must be emptied frequently. This has to be undertaken by a drainage contractor who will suck up the contents into a tanker. Some old cesspools were designed with overflow pipes; such cesspools do not conform to current legislation and design criteria and should not be allowed to overflow.

Leakage this is more common in very old cesspits built of brick. The structure may have deteriorated allowing ingress of groundwater and leakage of foul effluent that will cause pollution and odour.

Leaking connections the connection between the inlet pipe and cesspool may develop a leak.

Septic Tanks A septic tank is similar to a cesspool, but has the important difference that it only stores the solid material and allows partly treated liquid (effluent) to run away from the tank, either to further treatment, or to a system of underground land drains.

The raw sewage enters the septic tank via an inlet pipe, which slows down the velocity of the sewage and does not disturb the surface as it enters the tank. As the water slows, it cannot carry so much solid material in suspension and a sludge drops to the bottom of the tank. Due to the very slow movement through the tank, a scum (known as the crust) will form on the top surface of the tank. This allows the growth of anaerobic (oxygen hating) bacteria. These bacteria set about digesting or breaking down the solid material at the bottom of the tank, and turn it into liquid form, which then leaves the tank via the outlet. Not all the solid material will be broken down by this action so that over a period of time there is a build-up of sludge which has to be pumped out by a licensed contractor every 12 months depending upon usage.

The effluent that leaves the septic tank is untreated. The effluent is therefore passed into the subsoil via a network of drains which either have perforations or are laid in such a way that the effluent can trickle out of the drains into the surrounding ground.

The diagram below shows a traditional single septic tank having just one chamber and using inlet and outlet T pipes. This is the simplest form of septic tank and works as follows: 1. Sewage enters via the inlet T pipe and discharges to the lower of the tank. 2. Gravity pulls the solids in the sewage to the base and via anaerobic biological action, a scum layer can form on the surface. 3. Effluent (with a very low solids content) leaves via the oulet T pipe. This can then enter a second or third chamber and then leads to a soakaway field drainage system.

The basic principle is to remove as much of the solids content from the final effluent as possible.

Can I Use Bleach And Detergents?

The original concept of a septic tank was to use natural anaerobic biological action to produce an effluent with a low concentration of solids and combine this with the use of gravity to pull solids to the tank base.

Modern septic tank systems, as shown, tend to be designed on the use of gravity as the main process of separating the solids from the sewage effluent.

Now that we use a significantly higher amount of water and household cleaners in our everyday lives it is very difficult to achieve a good anaerobic action in septic tanks. If you have a modern tank unit, using bleaches and detergents (in normal quantities) should not present any adverse effects.

With more traditional tank systems you are more susceptible to problems due to bleaches and detergents. If the tank is of a small capacity or has only one chamber then you may find the soakaway will have a reduced lifespan.

We provide free estimates without obligation. If you would like further information please contact us!

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