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Sewage Treatment & Septic Tanks

If your property is not connected to mains sewage drains you'll most likely have or require a cesspool, septic tank or sewage treatment plant. This is very common in remote and rural locations. These cost effective systems have no connection to the public sewerage system and are known as off-mains drainage.

Basically there are 3 types of tank offering different levels of treatment.

1. A simple holding tank, known as a cesspool. These have no sewage system and simply hold the waste to be emptied by a vacuum tank before the tank fills. These are the least preferred option as they have high running costs and how often the tank will need to be emptied depends on the size of tank. But they do not require a soak-away or draining as 100% of the waste is kept within the tank.

2. A Septic Tank is designed to provide primary crude sewage water treatment. It retains solids and allows them to settle out in a primary settlement chamber. Here they are partially broken down by biological action so that only the remaining liquor (normally called effluent) is then sufficiently treated. The Effluent can then soak from the septic system into the ground in an underground soakaway system. There the oxygen and bacteria in the earth will provide further biological treatment.

3. Sewage Treatment Plants are designed to treat the waste to a much cleaner level within the tank. In a plant the treated wastewater is up to 97% clean and allowed to drain into a water course, stream, drainage ditch or a soakaway system. This is achieved by introducing more oxygen and/or mechanical devices to anaerobically digest the waste to allow for fast biological decomposing to take place. For larger installations this process can be achieved with a system of several tanks forming a wastewater treatment plant. Each specifically designed to process the waste sewage using different methods.

Some systems have separate chambers with different treatment processes. Initially they pass the waste through a settlement tank, separating the clarified water from the solid matter. The Solid Matter then begins to biodegrade. The secondary treatment process is called the Aeration Chamber. Here a combo of mobile Filter Media and a Bubble Diffuser combine their efforts to encourage bacteria to breakdown the waste in a biological reaction. Then a final Effluent Tank allows the remaining small solids to sink to the bottom. Then the Clarified Effluent can naturally drain from the plant via displacement allowing the earth to further treat it.

Soakaway systems: If you have a sewage treatment system with no access to open drainage or you have a septic tank you will require a well designed and installed soakaway system to allow for the discharge from the tank to soakaway into the ground for further biological treatment. Most problems with septic tanks and systems are caused by lack of maintenance or a soak away system that cannot cope with the required output.

We offer excellent temporary effluent waste storage devices that can be sited underneath toilet blocks, kitchens, canteens and welfare units!

These systems are within the binding rules of environment agencies however if you are unsure you should call us on 01722 714514 or Contact Us via email.