Septic Tank in Bexley

What Is A Septic Tank?

Septic tank may be a very strange concept to many individuals, but to the households that make use of them - they’re crucial to several homes especially the ones who are not connected to the mains sewage line

A septic tank .is simply an underwater sedimentation tank which is incorporated for the treatment of waste water via a process called biological decomposition and drainage. The tank utilizes natural processes in conjunction with tried and tested technologies for waste water treatment. The waste water comes from household plumbing which are often generated by bathrooms and toilets, kitchens, laundry as well as drains.

Septic tanks usually possesses a very simple design. They are simply underground containers that are watertight ( usually round or rectangular) made of plastic, fibreglass or concrete. They normally constitute different compartments which is a T-shaped outlet to prevent the sum and sludge from escaping that tank and finding a spot on the drain field area.

Septic tanks are particularly useful for households with a poor drainage system or those that aren’t connected to the mains sewage system. They serve as their main source of safe waste water disposal. The tanks work by collecting waste water and excreta in one huge underground tank and they happen to be very common in rural and developing areas.

Septic tanks are typically fitted underground and 50 metres away from the building. For those that live in towns and cities, septic tanks are mostly not needed as the waste water is normally transported and taken care of by their sewage system is is maintained and managed by a local water company. If you own a septic tank, you have an extra duty to make sure that it’s existence doesn’t negatively impact the environment.

How To Apply For A Septic Tank Permit

There are some binding rules that must be followed if you’re the operator of a septic tank system or small sewage treatment plant. This binding rules include the following:

✓ The sewage must be domestic in nature. For instance the scum, sludge and waster water should come from the shower, toilet, kitchen, laundry room etc. If you’re not sure if your septic tank is domestic in nature in nature you can contact the Environment Agency.

✓ The sewage must not lead to pollution

There are also some binding rules whether you release to the ground such as your backyard garden or to a surface water like a stream or river.

In the event whereby you do not meet the general binding rules, you’ll need to apply for a septic tank permit. Here, the form you’ll have to fill will depend on where you discharge your sewage and how much sewage you discharge.

If you discharge your sewage to the ground there are different forms depending on whether you’re in a groundwater protection zone (SPZ1). Outside an SPZ1, there are different forms if you discharge between 2 and 15 cubic metres in a day and if its over 15 cubic metres per day. While inside an SPZ1, if you discharge less than 2 cubic metres per day you’ll fill different forms for systems in use before 1st January, 2015 and systems installed on or after that date.

If you want to discharge between 5 and 20 cubic metres sewage per day to a surface water, you can apply for a standard rules permit. If you can’t get a standard rules permit, you’ll need a permit to discharge up to 20 cubic metres per day and over 20 cubic metres per day.

How Does A Septic Tank Work?

A septic tank system is an alternative to the mains sewage system whereby the wastewater is treated underground and is able to last for many generations. They’re mostly found in rural setting where there’s a lack of centralized sewer systems due to the difficulty in installing and managing them. These type of systems make use of the perfect blend of natural resources and advanced technology to treat wastewater produced from household plumbing. These includes the kitchen drain, bathroom, laundry room and more which all runs to the septic tank. When it gets to the septic tank, the organic matter will be digested and floatable matter alongside the solids are separated.

In this article, we’re going to give you a better understanding of how a modern septic tank works. Let’s take a look!

✓ All water stemming from your household goes straight into the main drainage pipe that lead directly to the septic tank.

✓ Meanwhile, the septic tank, which is usually underground and happens to be a water tight container, retains the waste water for a period long enough to enable the solid materials sit at bottom and start to dissolve. In the process, both oil and grease will float to the top as a layer of scum.

✓ Any wastewater that’s liquid will then leaves through the drainfield out of the septic tank.

✓ The drainfield, on the other hand, is a shallow excavation that’s made of unsaturated soil. The treated water is transported via the piping onto a porous surface which enable the filtration of the wastewater into the surrounding soil. The soil, in turn, treats and disperses the wastewater.

✓ Finally, the wastewater percolates into the soil for the removal of harmful bacteria alongside other contaminants.

How To Install A Septic Tank

If you’re planning to get a new septic tank system or replace the existing one, you’d probably want to know if it’s a task you can do all by yourself especially if you happen to be a competent DIYer. However, unless you’re a heavy equipment operator, installation of a septic tank system is by no means a DIY project. And even if you have the heavy machine at your disposal and you know quite well how to use it, you’re still going to need the guidance of professionals.

You’re going to need the services of a soil expert to evaluate the site, a plumbing contractor to fit and connect pipes, an engineer to design a good system and more. You may want to be involved in all these but local health authorities requires that a licensed personnel should be in charge. In this article, however, you’ll discover the septic tank system installation process.

To install a traditional septic tank system, you’ll have to start by digging a hole for the tank following strictly the instructions provided on your approved plan by the local authorities. Do not drop the tank into the hole after digging, you’ll need to connect it to the building sewer with 3 or 4 inch waste pipe which should be at a minimum slope towards the tank. Then, extend a drain pipe from the other end of a tank to a the distribution box on the drain field.

Once completed, dig several parallel trenches of this box extension across the drain field. Put in a layer of gravel along with 3 to 4 inch perforated pipes in individual trench and connect the pipes with the distribution box and cover them once done.