For inspection purposes only. Consent of copyright owner required ...

Operator Control
Daily control
Carlow Precast Tanks
Domestic Waste Water Treatment Plant
Notes:
• The AQUAstar tank is designed for maximum 1.0m overburden. Higher level of overburden
must be consulted with structural engineer.
• Garbage grinder in the kitchen may cause food wastes rotting in the tank which may
cause bad smell from the tank.
Recommendations:
• Installation of standard inspection manhole at the CPT Zons AQUAstar tank inlet side.
This will allow to easily remove any possible blockages from the inlet pipe.
• Installation of domestic grease trap at the kitchen outlet pipe. According to EPA 2000
Manual - Grease should not be allowed to enter the reactor. Major problem in the
drainage system in dwelling houses is the build up of grease and waste solids in the
drainage system. While the grease is still warm it flows freely but once it cools it solidifies
and eventually blocks the pipes. The grease trap can be easily installed in new and existing
waste water systems where 110mm piping is already being used.
Soil polishing filters
Soil polishing filters should be used to treat wastewater from mechanical aeration systems
which AQUAstar is. These filters are employed to reduce micro-organisms, phosphorus, and
nitrate nitrogen. Soil polishing filters may comprise in situ soil, improved soil or imported soil.
There grass growth is allowed, there can be a large reduction in NO3-N. These soils should
have percolation values (P or T) in the range of 1-50. Dosing may be by gravity or by pumped
arrangements. Please contact us for soil polishing filter type and size recommendation (Mob.:
086 1735964 or e-mail: aquastar@carlowprecasttanks.com).
CPT Zons does not provide design and installation of soil polishing filters. CPT Zons may recommend
trenches length or area according to EPA Manual. Client may ask County Council
for established list of approved site assessors.
Ensure that plant is in operation by checking the beacon installed
above the tank. Green led confirms that plant is in operation,
when green led is off that means that there is no power
supply. Red led on beacon indicates malfunction in operation
and alarm message is displayed on the MULTICOM control unit.
In this case contact Carlow Precast Tanks office for advice.
Monthly controls
For inspection purposes only.
Consent of copyright owner required for any other use.
Check if there is sludge in the plant's outflow and if inlet and outlet
pipes are not blocked.
When the end user is absent for a longer period, he must ensure
that the operation controls are executed by another person.
Sludge disposal
The wastewater’s solid deposits (sludge) are retained in the
plant’s primary settlement chamber. These solids must be disposed
by an authorized waste management company.
To guarantee optimum function of the plant, we recommend sludge removal only when required.
Sludge removal must be performed when the primary settlement chamber’s sludge
content exceeds 50 %. Ensure that only the primary settlement chambers are emptied, not
the aeration tank. Otherwise, the bacteria which perform the biological treatment are lost
and the plant must be reseeded.
After de-sludging the primary settlement chamber must be refilled with clear or rain water.
Refill from the middle chamber, so that possible remaining sludge is transferred into the first
primary settlement chamber.
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EPA Export 24-08-2012:23:55:54