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

is required, the end user shall arrange for sludge
system and identifying any actions required, will be
disposal
copied to the end user.
• Removal of AQUAstar unit and general cleaning
of components; 2.10 ENCLOSURE
• When necessary, perform a smoke test to
The area around the tank and polishing filter should be
establish adequacy of ventilation.
fenced off to protect it from farm animals and other
unwanted traffic.
A maintenance report, summarising the condition of the
Part Three / Design Data 3
3.0 DESIGN
3.1 GENERAL
The CPT Zons® AQUAstar® Wastewater Treatment
System is suitable for the collection and treatment of
domestic wastewater and shall be designed, installed,
operated and maintained in accordance with the
Certificate holder’s instructions, the EPA Wastewater
treatment manual – Treatment Systems for Single
Houses 2000 and this certificate. The conditions given
below apply:
a) Design and selection of the wastewater treatment unit
shall be carried out by a ‘competent person’ eg an
appropriately qualified and experienced engineer,
based on an adequate assessment of all relevant
information and having regard to the population served
and the influent to be treated.
b) The potential suitability of a site, for the installation of
such a system, shall be assessed using the
methodology outlined in the EPA Wastewater
treatment manual – Treatment Systems for Single
Houses 2000.
c) The system should only be installed in suitable ground
conditions ie where a ‘competent person’ determines
the ground conditions, and water table levels, are
adequate to support the tank, and to provide for
disposal of the effluent in accordance with relevant
regulations. If poor ground conditions prevail, e.g. soft
ground or shrinking clay, further advice must be
sought from a ‘competent person’.
d) Ground water and flood levels shall always be below
outlet level and the area should not be subject to
localised flooding.
e) Adequate provision should be made for access,
inspection and maintenance, in the drainage system
upstream and downstream of the system, through the
provision of manholes, distribution chambers etc.
f) Adequate provision shall be made for ventilation, to
ensure that noxious odours and dangerous gases can
escape from the system.
g) Storm water run-off e.g. from roofs or paved areas
shall be excluded from the system.
h) Good ground working practice shall be followed. Pipe
gradients should be in accordance with the EPA
manual.
i) The effluent shall be discharged to a suitable polishing
filter, designed by a ‘competent person’, taking into
consideration all relevant design information e.g. the
detailed site assessment report.
j) The unit shall be sited and installed in accordance with
the Certificate holder’s instructions, this Certificate, the
Building Regulations 1997 – 2007 and any relevant
planning conditions. It is recommended that a
‘competent person’ supervise the installation of, and
commission the system.
k) The Certificate holder is in a position to provide the
user with the knowledge and competencies necessary
to enable compliance with the Building Regulations in
all respects, including permitted influent and conditions
of use, installation, maintenance and de-sludging
For inspection purposes only.
Consent of copyright owner required for any other use.
Certificate No. 08/0318 / CPT Zons® AQUAstar®
requirements, design and installation of the polishing
filter and recommendations regarding monitoring.
l) Discharge to the unit should not exceed the design
loadings and is limited to domestic effluent. This
excludes rainwater, run off from paved areas or areas
where animals are housed, effluent with high grease,
oil, chlorine or offal content, discharge from garbage
grinders or water softeners, Jacuzzis/hot tubs, rags,
medicines, pesticides, oil, strong acids alkalis,
biological emulsifiers, disinfectants or
chemicals/poisons. If necessary, the certificate holder
should be contacted for advice.
m) The end user is responsible for ensuring that influent,
usage and discharge comply with national and local
regulations. The effluent from the unit will normally be
within Royal Commission Standard (i.e. suspended
solids content less than 30 mg per litre and
Biochemical Oxygen Demand (BOD) less than 20 mg
per litre) provided that the hydraulic and BOD loadings
are within the limits recommended by the Certificate
holder for the unit installed (180 litres per head per day
and 60g per head per day, respectively).
n) The system should be indelibly marked with the model
type and population equivalent such that details are
readily available to the householder, for future
reference.
o) The Certificate holder or his agent shall maintain
detailed records as appropriate e.g. site assessment
records, design calculations, percolation test results,
commissioning records, installation locations,
customer complaints etc.
p) If there is a concern regarding the suitability of the
treatment unit for a particular application, the
Certificate holder should be contacted for advice.
The Certificate holder recommends:
a) The use of a grease trap between the dwelling and the unit;
b) The use of phosphate free detergents.
3.2 DESIGN BASIS
3.2.1 Structural design
The relevant structural design assumptions and loading
conditions are given in Table 1.
3.2.2 Biological Processes - design
The relevant biological design assumptions and loading
conditions are given in Table 2. The expected effluent
quality and treatment efficiencies are given in Table 5.
3.2.3 Biological Processes - Start up period
A short period of acclimatisation is required after use
commences, before the system is fully functioning. This
period is generally a few weeks and is normal for any
biological treatment plant. The Certificate holder
recommends the system is charged by injecting 30 litres
of activated sludge (per person) into the activation
chamber to accelerate the growth of activated sludge.
EPA Export 24-08-2012:23:55:55