Septic Tanks
A standard septic tank consists of a tank 2800, 3800 or 4600 litres, each onion in shape and with three sections inside. The term septic refers to the anaerobic bacteria enviromental process that develops. The waste water enters the first chamber of the tank by gravity, allowing solids to settle and scum to float. The settled solids are anaerobically digested reducing the volume of solids. The liquid component flows through the dividing wall into the second chamber where further settlement takes place with the excess liquid then draining in to the final settlement area and then into the soak away system as dirty water for final treatment through the soil eventually returning to the ground water system. The percolation value of the soil has a very large effect on the efficiency of this process. Septic tanks can be coupled with other Bio-treatment plants which involve artificial forced aeration.
» Septic Tank Help & Guidance
Our range of septic tanks:
Knollands Bio-Pure 1-40 population septic tank
The Bio-Pure septic tank is a two-chamber unit and consists of a conical tank that contains an inner tank aeration chamber, which is open at the base. The space between the inner and outer tank is the clarifier chamber. A draft tube, positioned 100mm from the base of the clarifier, extends up into the aeration chamber.
Air from the compressor housed under the septic tank lid is piped to a diffuser in the draft tube. Raw sewage enters the aeration chamber and air surging from the draft tube aerates the sewage, causing an aerobic bacterial colony to establish and digest the organic matter. As more raw sewage enters the chamber, an equal amount of effluent displaces through the open bottom into the clarifier. The quiet conditions in the clarifier allow all the suspended solids to sink to the base of the clarifier and they are drawn back up the draft tube by the upward flow of air for further digestion in the aeration chamber. The Clear effluent rises to the top of the clarifier and passes over a weir into the outlet pipe. The Bio-Pure septic tank constantly recycles the sewage via gravity and achieves nearly total solids digestion. Most sewage treatment units consist of three chambers, the first one being primary settlement tank where the solids from a septic sludge. They require regular emptying by tanker. Because the Bio-Pure septic tank digests the solids as well as the organic matter in the liquid, the unit has a much longer emptying interval than any three-stage unit. The interval is 3 to 5 years.
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Entec SuperSeptic tank
Advanced septic tanks, like Kingspan's Entec SuperSeptic Tank, offer a much higher level of effluent quality. The Entec SuperSeptic tank is available in two sizes suitable for either an individual domestic dwelling (maximum 6 persons) or two properties (maximum 12 persons).
| Capacity (Litres) |
Population Equivalent |
Dia.
(mm) |
Invert to Base (mm) |
Standard Inlet Invert |
Deep Inlet Invert |
| |
|
|
|
|
|
| 3800 |
6 |
2070 |
1795 |
0.9 |
1.4 |
| 6000 |
12 |
2390 |
2200 |
1.0 |
1.5 |
- BOD Factor 50 - significantly reduces smell and pollution if overflow occurs
- Manufactured using state-of-the-art GRP pressure moulding technology
- Contained within a rigid GRP tank, the structural aeration chamber will not collapse during desludging
- Easy to install
- Designed to require only an annual desludge
- Small footprint, discreet 600 x 600mm opening with pedestrian duty cover
- Low cost operation - less than a 60 watt bulb
- Reliable and simple with no electrical or moving parts within the septic tank
- Septic tank has adjustable inlet invert level, with a standard invert of 1.0 metre and maximum of 1.5 metres
- Small air pump can be discreetly situated above ground and up to 13 metres away from unit causing minimal disruption when maintained
- Efficient process combining 'submerged aerated media' and 'activated sludge'
- Integrated media sack within plant stablises biological treatment and ensures rapid start-up after maintenance or power failure
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Entec Alpha septic tank
The Entec Alpha septic tank comes in three sizes and is suitable for individual domestic dwellings up to a large family house.
| Capacity (Litres) |
No. People (200l/head/day) |
Diameter (mm) |
Inlet Level to Base (mm) |
| |
|
|
|
| 2800 |
4 |
1905 |
1565 |
| 3800 |
10 |
2070 |
1795 |
| 4600 |
14 |
2080 |
2035 |
- BOD Factor 200 - likely to smell and contaminate if overflow occurs
- Internal baffle design within the septic tank aids separation and retention of solids, improving the effluent quality thus providing a long life to the soakaway
- Made from composite GRP - strong, light, chemically resistant and watertight
- Press moulded shape provides wide, squat, form which makes the septic tank easy to install and handle
- Stable base for storage
- Shackles are provided to aid lifting and positioning within the excavation
- All unit volumes are designed in accordance with the recommendations given in BS 6297: 1983
- The new manufacturing process minimises styrene emissions and reduces waste - all the better for our environment
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Klargester Beta septic tank
Klargester Beta septic tanks are available in three sizes suitable for various applications.
| Capacity (Litres) |
No. People (200l / head / day) |
Diameter (mm) |
Inlet Level to Base (mm) |
| |
|
|
|
| 2730 |
4 |
1760 |
1820 |
| 3635 |
9 |
1940 |
1980 |
| 4540 |
14 |
2000 |
2230 |
- BOD Factor 200 - likely to smell and contaminate if overflow occurs
- Manufactured from robust, impact resistant, high quality polyethylene
- British Board of Agrément (BBA) Certified
- Strong, easy to move and simple to install
- Wide neck for easy access for annual desludging
- Extension neck available to allow for deeper installation on difficult sites
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Kingspan Large Capacity septic tank
Large Capacity septic tanks are suitable for rural sites where ground conditions favour the use of a septic tank with discharge to sub-surface irrigation.
| Capacity (Litres) |
No. People (200l / head / day) |
Diameter (mm) |
Inlet Level to Base (mm) |
| |
|
|
|
| 6000 |
22 |
2390 |
2200 |
| 7500 |
30 |
2516 |
2540 |
| 9000 |
38 |
2650 |
2550 |
- BOD Factor 200 - likely to smell and contaminate if overflow occurs
- For populations of 22 persons or above
- 6000 to 9000 litre capacity
- Annual desludging intervals
- All unit volumes are designed in accordance with the recommendations given in the BS 6297: 1983
- Adjustable access shaft for ease of installation
- Standard 1.0 metre invert and Heavy Duty 1.5 metre invert
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Anua septic tank
Anua septic tanks come in three sizes and are suitable for individual domestic dwellings up to a large family house.
| Capacity |
Number of people asuming a flow of: |
| Litres |
180L/head/day |
250L/head/day |
| |
|
|
| 2800 |
4 |
3 |
| 3800 |
10 |
7 |
| 4600 |
14 |
10 |
| |
|
|
- Internal baffle design within the tank aids separation and retention of solids, improving the effluent quality thus providing a long life to the soakaway
- Made from composite GRP - strong, light, chemically resistant and watertight
- Press moulded shape provides wide, squat, form which makes the tank easy to install and handle
- Stable base for storage
- Shackles are provided to aid lifting and positioning within the excavation
- All unit volumes are designed in accordance with the recommendations given in BS 6297: 1983
- The new manufacturing process minimises styrene emissions and reduces waste - all the better for our environment
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