Unlike some other treatment plant technologies, the Diamonds works effectively at maximum PE loadings, therefore, it is not necessary to oversize plants in order to meet consistently the Environment Agency’s Consent to Discharge Standards.

The Diamond STP has some major advantages over competitive plants available for use in the domestic or small commercial sector marketplaces, namely:

• Long interval between plants de-sludging (emptying) once every 2-3 years, or longer. Most competitive plants require emptying at 3, 6 or 12-monthly intervals. The Diamond’s long desludge interval alone will show a considerable cost-saving. This is due to the Diamond’s unique process of treating both the liquid and solids.
  
• The Diamond has NO media, NO electrics and NO moving parts within the hostile environment of the treatment plant so has low on-going maintenance costs. Although this may not happen for several years, some other plants have media, bearings, pumps, motors, gears, chains or shafts inside the plant that are expensive and time-consuming to clean, repair or replace when they do fail. You may also be without a treatment system whilst repairs are carried out.
  
• The Diamond only needs minimal annual maintenance tasks. These tasks are quick, easy and are not messy, unlike some other plants. Clients may do their own servicing or alternatively, we can provide specialist maintenance (and keep records as required by Environment Agency’s Consent to Discharge) and supervised tankering.

• The Diamond’s unique internal weir design ensures that solids do not escape with the final effluent into the soakaway or watercourse.

• The Diamond’s process relies on gravity then aeration to circulate oxygen to assist the natural biodegrading of the solid matter and fluids. A kiosk housing the compressor with low power consumption (70 up to 270 watts, dependent upon model) is externally mounted to provide aeration to the plant.

• The Diamond treats effluent to the 20 :30 mg/l BOD : Suspended Solids Royal Commission standard on a 95%ile basis.
  
• As Diamonds do not have Primary Settlement Tanks (where raw sewage can turn septic after 90 days) they should not produce unpleasant odours (hydrogen sulphide) emanating chiefly from stored solids. Generally, plants do not require venting as the normal route is through the soil vent pipe (svp) on the building.

Salt-based water softeners should not be used with any sewage treatment plant unless the backwash of concentrated brine solution can be diverted to not discharge into the plant. This backwash gives the live bacteria a toxic shock.

Waste disposal units can be used but they will increase the loading on the plant by 30% and may marginally shorten the period between desludges.

Watling Hope operates nation-wide providing high quality service, technical advice and plant. We instal a range of equipment from package sewage treatment plants and other ancillary equipment to pumping stations to connect to the main sewers, whichever is the most appropriate to meet our client’s needs. Watling Hope can either supply the plant on:

• a ‘Supply Only Basis’ with or without ‘Test and Commissioning’ or provide a complete ‘Turnkey Solution’ for the design, supply, installation, test and commissioning

• provide on-going Service & Maintenance for your new sewage handling system.
  

Diamond plants provide overall good value and return on investment over the life of the plant as they are designed and manufactured up to a standard rather than down to a cost.