Knollands Septic Tanks & Drainage

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.

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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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Knollands Septic Tanks Bio-Pure Septic Tank

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 Super Septic Tank

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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Entec Alpha Septic Tank

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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Klargester Beta Septic Tank

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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Kingspan Large Capacity septic tank

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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Knollands Septic Tanks

Low Profile septic tank for 5-45 people

This intelligently designed Shallow Dig Septic Tank has been designed to save you time and money during installation. This unit will typically save you 50% of your installation costs as money is saved on:

  • Excavation costs
  • Soil removal costs
  • Back fill costs

Information

  • Pea gravel backfill for dry sites
  • EN 12566-1 approved
  • Installation in hard rock areas where deep digs are not possible
  • 30mm between inlet and outlet
  • 0.5 and 1m neck extensions available for deeper installations

The Clearwater Sigma is a stock item and is typically available within 5 working days to any site In the UK

Specification 5 person

  • 2,800 litres
  • Diameter - 1.2m
  • Length - 2.9m
  • Height - 1.7m
  • Standard invert 500mm

Easy to install

The Sigma tank is the most affordable, easy to install tank that is designed to save you time and money.

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Knollands Septic Tanks Knollands Septic Tanks

Septic Tanks

Our range of septic tanks are suitable for both domestic and commercial applications and for populations of 1 up to 500 people. The Knollands Bio-Pure septic tank is an innovative and cost effective solution and as a result is our best selling septic tank.

Drainage systems

Wether it be agricultural drainage coil, twin walled CorriPipe™ or Hunter sewer drains, Knollands can offer quality drainage systems for a number of different requirements and are perfect for use with our range of septic tanks and rain harvesting products.

rain harvesting

Knollands supply mainly Graf Carat S underground tanks due to their quality construction and reliable design. Convenient packages that include everything you need to start rain harvesting result in a simple and enjoyable project that benefits you and the environment.

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