PHOsphate Removal System
Treatment plants are highly effective at breaking down sewage to the extent that their effluent may be permitted to discharge directly to watercourses such as streams and rivers.
However, while they can biologically break down the main pollutants (BOD, suspended solids and ammonia) most small treatment plants do not have the ability to reduce phosphates, an element commonly found in detergents and human waste.
- Can reduce phosphate levels to 2mg/l in typical applications.
- Caters for up to 150 people.
- Compatible with Klargester AirFlow units.
- Customizable set-up available for specific needs.
Why Phosphates Can Be Harmful
Phosphates are a nutrient and their presence encourages new growth, but problems can arise when too much phosphate over-enriches the water. This upsets the natural balance and leads to an accelerated growth of algae and higher forms of plant life.
In order to protect sensitive areas, local authorities and environmental agencies are increasingly stipulating the use of sewage treatment systems that produce very low levels of phosphate discharge. This has resulted in increased costs requiring the purchase of specialised treatment systems.
The PHORS Tank Solution
The PHORS (Phosphate Removal System) tank has been specifically designed to work in series with the standard AirFlow range of treatment plants. It is a self-contained single tank that is comprised of an internal settlement chamber and chemical dosing system.
Installed in conjunction with an AirFlow treatment plant it can reduce phosphate levels to 2mg/l in typical applications.
Process Description
After receiving biological treatment in the AirFlow plant, sewage effluent flows by gravity into the first of the PHORS Tank’s two chambers. This first compartment serves as a holding chamber.
At pre-set intervals a controlled volume of effluent is pumped into the second chamber where a chemical is automatically added. The chemical becomes mixed with the transferred effluent and causes the phosphate to coagulate with the solid waste particles, ending up as sludge that must be periodically removed. The now highly clarified effluent is then allowed to discharge out of the PHORS Tank to the designated watercourse or disposal area.
System Requirements
A power supply is required at all times to ensure the controlled transfer of liquid through the internal pump and the required chemical dose.
The unit also features a control panel that allows both the chemical dose and transferred volume to be varied according to the expected daily volume and level of phosphate in the influent.
Chemical Treatment
The PHORS Tank system treats phosphate with an iron compound (liquid ferric chloride 40%).
The chemical will require storage in a separate unit in an appropriate location, sized to suit the daily dosing and supplier’s container volume. Owls Hall can supply a variety of secure kiosks to suit most applications, or alternatively the components can be fitted into a suitable facility/enclosure.
Installation
The PHORS Tank is installed below ground, connected in series to the outlet of the main AirFlow treatment plant. The unit requires a minimum fall of 50mm to permit gravity flow and consideration should be made for desludging access.
The chemical storage kiosk and control panel should be located within 3 metres of the PHORS Tank’s first manhole cover and will require it’s own electrical supply.
Owls Hall offer a full Installation service. Please visit our Installation section for more information.
Owls Hall offer a full commissioning and after sales service involving planned maintenance visits. Please visit our servicing section for more information.
| Product Ref. | Overall Height (mm) | Overall Length (mm) | Inlet Invert (mm) | Empty Weight (kg) | Population Equivalent |
|---|---|---|---|---|---|
| PHORSA1.0 | 2800 | 3200 | 1000 | 520 | 40 – 55 |
| PHORSA1.5 | 3300 | 3200 | 1500 | 550 | 40 – 55 |
| PHORSA2.0 | 3800 | 3200 | 2000 | 580 | 40 – 55 |
| PHORSB1.1 | 3000 | 4625 | 1150 | 700 | 75 – 100 |
| PHORSB1.6 | 3450 | 4625 | 1650 | 740 | 75 – 100 |
| PHORSB1.9 | 3750 | 4625 | 1900 | 765 | 75 – 100 |
| PHORSC1.1 | 2950 | 5400 | 1150 | 825 | 125 – 150 |
| PHORSC1.6 | 3500 | 5400 | 1650 | 865 | 125 – 150 |
| PHORSC1.9 | 3750 | 5400 | 1900 | 890 | 125 – 150 |
This Chart is a general guide
All Klargester products have a full initial 12 month warranty covering all mechanical and electrical components against malfunction, provided the unit has not been subject to damage or abuse.
