It is design such as night soil must be keep in this tank for minimum value of 24 to 36 hours.
Three chamber septic tank.
Ecotank septic tanks are built with three chambers which helps achieve remarkably better results compared to two chamber tanks.
Septic tanks potential problems.
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A septic tank should have at least two chambers 3 is better but 2 is enough.
The second chamber is 0 6m x 1 0m x 1 6m deep 0 96 cu m capacity a total capacity of 2 88 cubic metres.
First chamber is that chamber in which directly night soil comes in through inlet pipe.
Size of septic tank is depends on its detention periods.
In this tank the first chamber is 1 2m x 1 0m x 1 6m deep 1 92 cubic metres liquid capacity.
The first chamber should be at least half of the total length in case of more than two chambers and a length of 2 3 of the total length should be considered when there is only two chambers exist.
Septic tank three chambers septic tanks with partial biological processes septic tanks with partial biological processes are used to extract floating and removable substances.
Sometimes with excess wasting of cooking oils and grease can fill up the upper portion of the septic tank and can cause the inlet drains to block.
It is made of two or three chamber which is divide by baffles wall.
The lifetime of a two chamber tank is about 5 7 years while a three chamber tank with a drain pipe at the outlet can last 25 30 years.
Due to the sizing of 1 500 l per inhabitant the wastewater passes through the system in approx.
The second chamber can be around half the size of the first chamber.
As septic tank is a basic sedimentation tank it is in a rectangular or cylindrical shape with minimum of two chambers.
Design step of septic tank.
The incoming wastewater pass through three different rooms and while within lightest materials date back to flotation and heavier materials fall on the bottom of the tank.
The outlet water is noticeably cleaner.
The different rooms are divided by polyethylene baffles equipped with holes.
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