Sewage Treatment Plant | CRYSTAL

These plants are no longer produced due to the enormous cost involved in obtaining an EN 12566-3 Certificate, which is now mandatory for all sewage treatment plants under 50 person size, sold in the UK. We offer the PureFlo range as a superior alternative.

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Air from the compressor housed under the lid is piped to a diffuser in the draft tube.

1. Raw sewage enters the aeration chamber and air surging up from the draft tube aerates the sewage, causing an aerobic bacterial colony to establish in the aeration chamber and digest the organic matter in the sewage. 

2. As more raw sewage enters the aeration chamber, an equal amount of effluent displaces through the open bottom into the clarifier.

3. 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 Crystal constantly recycles the sewage via gravity and this is how it achieves nearly total solids digestion.

4. The clear effluent rises to the top of the clarifier and passes over a weir into the outlet pipe, from where it id discharged to a soakaway or watercourse.

     The Crystal ECO domestic sewage treatment plant is designed in accordance with BS6297:1983.  It is designed to produce an effluent of 20:30mg/litre BOD/SS on a 95percentile basis

The Crystal ECO sewage treatment unit can be adapted at the build stage to suit any inlet or outlet  level

 Installation of the Crystal Eco

The Crystal ECO is simple, quick and cheap to install as it has the option of NO concrete for the installation if desired.  It requires only soil/sand/gravel as backfill as it is a robust, quality tank.  Most other sewage treatment plants require a concrete base and a min. 300mm concrete backfill, which makes the installation much more expensive  The aeration treatment unit itself is installed in two halves and the top is eye-bolted to the bottom before the tank is leveled, backfilled with the soil/ gravel and filled with water.  The compressor sits in a chamber under the lid, which is designed to keep it safe and dry.

If you have a high water table, there are two installation options.

1.     The Crystal ECO domestic sewage treatment plant can be held down via 4 simple metal ground anchors which take 10 mins. to install.  Backfill with soil/sand/gravel.

2.    A small amount of concrete can be used to cover the anti-flotation Lugs, then backfill with soil/sand/gravel.  Full installation manual available

Please click here for the full installation manual

Please click here for the Crystal ECO Brochure

      Waste Tech offers a complete installation service within 100 miles of York

Technical Specifications for the Crystal ECO extended aeration system

	Crystal ECO 6	Crystal ECO 12	Crystal ECO 15	Crystal ECO 20
No of Persons	1 to 6	5 to 12	10 to 15	14 to 20
Average daily flow rate	1200 L	2400 L	3000 L	4000 L
Max. BOD/Day	360 gms	720 gms	900 gms	1200gms
In Ground Depth	2.25 m	2.75 m	2.75 m	2.75 m
Outside Diameter	1.85 m	2.1 m	2.1 m	2.1 m
Inlet Invert	570mm	700mm	700mm	700mm
Outlet Invert	670mm	800mm	800mm	800mm
Weight Empty	123kg	200kg	205kg	210kg
Total Capacity	2271 L	3975 L	3975 L	3975 L
Power Consumption	100 watts	120 watts	150 watts	200 watts
Delivery time from order	1 week	2 weeks	2 weeks	2 weeks

 The Crystal ECO Extended Aeration sewage treatment unit is simple and efficient

Please click here for the Crystal ECO sewage treatment plant and septic tanks website

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