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The Standard Sentinel is suitable for the removal of a wide range of organic and inorganic aqueous pollutants including heavy metals. Its primary use and original conception was for the treatment of dilute pesticide waste. Its combination of optimised flocculation with activated carbon treatment is designed to handle a wide variety of contaminants and reduce them to very low concentration.

Independent trials show that substances up to a maximum concentration of 3% can be effectively removed from water by the standard pre-packaged treatment process to levels which are usually below the limits of detection. This includes many well known toxic contaminants such as pesticides or "Red List" industrial pollutants. Dangerous heavy metals such as Copper, Cadmium or Chromium may normally be removed to levels well below those permitted for discharge into public sewers. The resulting treated water may be re-used for purposes such as washing equipment, containers, plant or working areas. Alternatively it may be disposed of by soil surface irrigation or to the public sewer.

A comprehensive range of after sales services involving the supply of treatment reagents, spare parts and plant servicing is available.The Sentinel treatment plant is available in 3 different sizes to suit each customer’s requirements. All plants can be designed to be as manual or automated as needed, with additional treatment requirements being assessed at the design stage. All of the Sentinel plants can be fitted with additional in-line pH treatment if desired and can be supplied with an automatic paper filter for 24 hour operation. WMEC also has comprehensive sludge handling expertise and can provide filter presses, sludge conditioning systems, centrifuges and cyclones.

The below chart illustrates the three main sizes of the Sentinel, its standard treatment capacities and subsequent operator hours required. As it can be clearly seen the Sentinel is suitable from small operations to significantly larger sites.

Volume of PESTICIDE wastewater per day in litres 500 1000 2000 3000 4000 5000 7500 10000 20000 30000
Machine Type   Operator hours per day
SENTINEL Mini Manual 0.5    ✓                  
  1       ✓                
SENTINEL Standard Manual 0.5       ✓                
  1         ✓     ✓            
SENTINEL Standard Plus Semi Auto 0.5         ✓              
  1           ✓    ✓     ✓        
SENTINEL Standard Fully Auto Auto 1           ✓    ✓    ✓ ✓ 24 hours ✓ 24 hours    
SENTINEL Major Manual 3              ✓      ✓      ✓    
SENTINEL Major Auto 1              ✓     ✓     ✓      ✓      ✓

If a Sentinel is required on more than one site, we manufacture a trailer mounted mobile version of the mini and standard plants which can be easily towed behind a mid sized car. Please contact us for further information.

Diagram number 5 is an example of a Sentinel standard semi auto and shows the general flow though the system.

Plant footprints and electrical requirements are as follow:

Sentinel mini  2.14 x 1.75 x 1.5 220v, compressed air supply
Sentinel standard  2.14 x 1.75 x 3.5m 220v, single phase
Sentinel semi auto 2.14 x 1.75 x 3.5m 220v, single phase, compressed air supply
Sentinel fully auto 2.14 x 1.75 x 3.5m 380v, three phase, compressed air supply
Sentinel major   6 x 3 x 3m (approx)  380v, three phase, compressed air supply

If height restrictions are present, the plants (excluding the major) can be laid out in a side by side configurement, thus reducing the height to approx 2m.


Image 1 - Sentinel mini
Image 2 - Sentinel standard
Image 3 - Trailer mounted Sentinel standard fully auto
Image 4 - Sentinel major fully auto