Eurotank TER3, is a CONCRETE Packaged Tertiary Treatment System which further treats effluent from a secondary treatment system, example Eurotank BAF. It is an allowed form of Tertiary Treatment, under Option section 10.2 EpA Code of Practice ideal for most sites including difficult sites, with high vulnerability, Nutrient or Pathogen Sensitive area`s and especially suited to small sites due to its small footprint.
Raw sewage enters the secondary unit by gravity from the house and is treated, effluent then leaves this unit and is pumped via a network of piping over the surface of the TER3 , it then trickles down through the various layers receiving Biological treatment before final discharge to the ground. The unit is connected to a network of perforated pipes and sits on a layer of distribution gravel as a slightly raised small bed or finished at ground level, depending on the results of the percolation test.
Secondary treated water from the tank is pumped and distributed via a pipe network with orificing shielding.
Water is distributed evenly over the fibre safe bags which remove any residual solids and in particular greases which ensure long life use of the natural and synthetic mix fibre Media.
The waters then trickle through the fibre to receive final treatment and polishing before entering the percolation pipework over a bed of stone for distribution and final discharge to underlying soils.
Tertiary wastewater treatment is an additional treatment stage following primary and secondary treatment. Its purpose is to further improve the quality of the treated wastewater before final discharge or infiltration.
The EPA describes tertiary treatment as additional treatment used where treatment beyond primary and secondary treatment is necessary, including situations where further reduction of nutrients or pathogens is required or where sensitive receiving environments need additional protection.
EN 12566-7 is the European standard relating specifically to prefabricated tertiary treatment units used in small wastewater treatment systems.
The EN 12566 series covers different components and stages of wastewater treatment. Part 7 applies to the tertiary treatment stage.
The Eurotank TER3 has undergone independent testing by PIA – Prüfinstitut für Abwassertechnik GmbH under EN 12566-7.
Its independent testing recorded treated effluent results including:
These figures are independently recorded test results and should not be interpreted as a guarantee of identical performance under every site or operating condition.
The different parts of EN 12566 relate to different types or stages of wastewater treatment.
EN 12566 Part 3 covers packaged and/or site-assembled domestic wastewater treatment plants.
EN 12566 Part 6 covers prefabricated treatment units receiving effluent from a septic tank.
EN 12566 Part 7 covers prefabricated tertiary treatment units, providing an additional stage of treatment after the preceding treatment stages.
Understanding the distinction is important when specifying a wastewater treatment solution because the appropriate system depends on the treatment requirements and site assessment.
The Eurotank TER3 is currently listed by PIA within its Irish Tertiary Treatment Systems – Part 7 category.
S.R. 66:2015 is an Irish Standard Recommendation providing guidance to designers, manufacturers and installers when selecting domestic wastewater treatment systems for use in Ireland.
It is intended to be used alongside the relevant parts of the EN 12566 series and the EPA Code of Practice.
Among other areas, S.R. 66 provides guidance relating to system selection, treatment performance, system scaling and sludge storage requirements.
For the Eurotank TER3, PIA’s Irish certification documentation presents the independently tested EN 12566-7 performance information with results corresponding to the relevant S.R. 66 parameters.
Not every wastewater treatment installation requires tertiary treatment.
According to the EPA Code of Practice, tertiary treatment may be used where treatment above primary and secondary treatment is necessary, including circumstances involving discharge to surface water or where additional reduction of nutrients or pathogens is required in sensitive areas.
Whether tertiary treatment is required will therefore depend on factors such as:
The appropriate treatment solution should always be determined as part of the overall site assessment and wastewater system design.
Potentially, yes.
In some circumstances an existing wastewater treatment installation may be capable of being upgraded by introducing an additional tertiary treatment stage rather than replacing every component of the existing system.
However, this depends on the condition and suitability of the existing system, the quality and type of wastewater entering the proposed tertiary unit, the site conditions and the treatment objectives.
An upgrade should therefore begin with an assessment of the existing installation and the site requirements.
TPW Systems can work with homeowners, site assessors, engineers and wastewater professionals to determine whether the Eurotank TER3 may form part of an appropriate upgrade solution.
PE means Population Equivalent.
It is a standard method used to express the organic biodegradable load entering a wastewater treatment plant.
The EPA defines 1 PE as an organic biodegradable load having a five-day biochemical oxygen demand — BOD₅ — of 60 grams of oxygen per day.
PE is therefore an important consideration when sizing a wastewater treatment system. It is not simply a matter of choosing a tank based on the physical size of a building.
The expected occupancy, wastewater loading and nature of the property must all be considered when selecting the appropriate system.
The Eurotank TER3 certification documentation includes configurations from 6 PE through to 48 PE, allowing TPW to provide solutions across a range of wastewater treatment requirements.
For individual projects, the appropriate TER3 configuration should be determined in conjunction with the project requirements, site assessment and system design.
