The Treatment Process:
Stage 1: Primary Settlement Chamber
Anaerobic breakdown takes place in the primary settlement chamber where the wastewater is introduced into the system. The large volume of this chamber reduces velocity of the wastewater. This along with the long flow path allow the wastewater maximum time in the first chamber resulting in a higher settlement rate. Settlement occurs when the heavier solids, drop out of the wastewater and settle to the bottom of the tank to create a sludge or when lighter solids, like fats or oils, float to the top of the water to create a scum. Up to 70% of the solids are removed in Primary settlement zone. Anaerobic breakdown begins to occur and improve the water quality.
A baffling system holds the sludge and scum in the primary settlement zone and ensures that water from the centre of the chamber moves into the aeration zone. The large sludge storage volume increases the desludging intervals.
Stage 2: Aeration (Treatment) Chamber
Stage 2 takes place in the aeration chamber where Submerged Aeration combines the principles of the bio film and activated sludge processes. Masses of naturally occurring bacteria inhabit specially designed plastic filter media. The filter media, has large surface area, and is supported within the aeration zone. As the liquid flows slowly through the filter media the bacteria feed on the waste removing them from the liquid. These bacteria are sustained with air, which is continuously supplied from a purpose built low pressure, high volume air compressor in the top section of the unit. The air is delivered through a diffused aeration system, which break the air into bubbles as they are dispersed through the aeration zone.
Stage 3: Final Settlement Chamber
As the liquid flows from the aeration zone into the final settlement zone small quantities of bacteria may be carried with the liquid. Before discharge from the system, these solids must be separated from the liquid. With the velocity of the liquid once again slowed down and the flow path maximised the bacteria is encouraged to settle to the bottom of the tank, like sludge, through the up flow nature of the zone. A sludge return system pumps this sludge back to the primary settlement zone. The remaining treated liquid now meets the required standard to be safely passed out of the Tricel Unit. hundred people.
The Tricel Bio System is an Irish Agrément Certified sewage treatment system. The Tricel Bio System has been tested for European standard EN 12566-3 and has successfully passed these tests and is now approved to the New European standard EN 12566-3 Small wastewater treatment systems for populations up to fifty people. The Tricel Bio System is available in a range of systems from a single house system up to a community system with a maximum of five hundred people.