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In a world where caring for our environment is rapidly becoming a top priority, understanding the basics of septic tanks and sewage treatment plants installation has never been more relevant. For those living far from municipal sewage systems or for those who prefer a more sustainable approach to waste management, these systems are particularly crucial. Not only do they help to manage household waste effectively, but they also protect the environment by purifying wastewater before it goes back into the ground.

What is a Septic Tank?

A septic tank is an underground wastewater treatment system usually used in areas not connected to a centralized sewer system. It uses the process of biological decomposition and physical separation to treat the wastewater, breaking it down and purifying it before it is release into a drain field.

What is a Sewage Treatment Plant?

In contrast, a sewage treatment plant is technically similar to a septic tank but more advanced. It breaks down solid waste to a level where the treated effluent can be discharged directly into watercourses without causing pollution.

How do They Work?

These systems work in linear stages:

  1. Collection: Wastewater from the house including bathroom, kitchen and laundry flows into the tank.
  2. Separation: The wastewater splits into three layers within the tank. Solid waste sinks to form sludge, while oil and grease float on top to form scum, leaving the relatively clear water in the middle.
  3. Decomposition: Bacteria in the tank break down the solid waste, converting it to liquid.
  4. Discharge: The liquid flows into the drain field for further natural treatment in the soil.

The Importance of Professional Installation

The process may sound simple, but the actual installation requires professional expertise. Mishandling of any stage can lead to costly repairs, environmental damage, or health issues. This is where companies like Country Drainage come in. With experience servicing several areas including Cranbrook, Crowborough, East Grinstead, East Sussex, Edenbridge, Haywards Heath, Horsham, Kent, and more, Country Drainage has a team of specialists ready to assist with every stage.


Understanding septic tanks and wastewater treatment plants is the first step towards sustainable waste management. As crucial as these systems are, the actual installation and maintenance should be left to experienced professionals. Are you ready to take a step towards a more eco-friendly waste management system? Need professional advice on septic tanks or sewage treatment plants installation? Contact Country Drainage on 01892 599732.