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oSIST prEN 12566-6:2018
01-december-2018
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Small wastewater treatment systems for up to 50 PT - Part 6: Prefabricated treatment
units for septic tank effluent
Kleinkläranlagen für bis zu 50 EW - Teil 6: Vorgefertigte Anlagen für die weitergehende
Behandlung des aus Faulgruben ablaufenden Schmutzwassers
Petites installations de traitement des eaux usées pour une population totale équivalente
(PTE) jusqu’à 50 habitants - Partie 6 : Unités préfabriquées de traitement secondaire
Ta slovenski standard je istoveten z: prEN 12566-6
ICS:
13.060.30 Odpadna voda Sewage water
oSIST prEN 12566-6:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN 12566-6:2018
DRAFT
EUROPEAN STANDARD
prEN 12566-6
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2018
ICS 13.060.30 Will supersede EN 12566-6:2016
English Version
Small wastewater treatment systems for up to 50 PT - Part
6: Prefabricated treatment units for septic tank effluent
Petites installations de traitement des eaux usées pour Kleinkläranlagen für bis zu 50 EW - Teil 6:
une population totale équivalente (PTE) jusqu'à 50 Vorgefertigte Anlagen für die weitergehende
habitants - Partie 6 : Unités préfabriquées de Behandlung des aus Faulgruben ablaufenden
traitement secondaire Schmutzwassers
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 165.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12566-6:2018 E
worldwide for CEN national Members.
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prEN 12566-6:2018 (E)
Contents Page
European foreword . 5
3.1 Terms and definitions . 9
3.2 Symbols and abbreviated terms . 9
4.1 Design . 10
4.1.1 General. 10
4.1.2 Inlets, outlets, internal pipework and connections . 10
4.1.3 Ventilation . 10
4.1.4 Access . 11
4.1.5 Extension shaft . 11
4.1.6 Sizing basis . 11
4.1.7 Overall dimensions . 12
4.2 Load bearing capacity . 12
4.2.1 General. 12
4.2.2 Load bearing capacity determined by calculation (See 4.2.1.1, e) . 12
4.2.3 Load bearing capacity determined by testing (See 4.2.1.1, a) to d)). . 14
4.3 Treatment efficiency . 15
4.3.1 Characteristics . 15
4.3.2 Tank selection . 16
4.4 Watertightness . 16
4.4.1 General. 16
4.4.2 Water loss . 17
4.4.3 Pressure variation . 17
4.5 Durability . 17
4.5.1 General. 17
4.5.2 Concrete . 18
4.5.3 Steel. 18
4.5.4 Unplasticized polyvinyl chloride (PVC-U) . 18
4.5.5 Polyethylene (PE) . 18
4.5.6 Glass reinforced plastic (GRP) . 19
4.5.7 Polypropylene (PP) . 19
4.5.8 Polydicyclopentadiene (PDCPD) . 20
4.5.9 Flexible sheets . 21
4.6 Reaction to fire. 21
4.6.1 General. 21
4.6.2 Classification without the need for testing . 22
4.6.3 Classification according to the test results . 22
4.7 Treatment capacity . 22
5.1 Load bearing capacity . 22
5.1.1 Crushing test . 22
5.1.2 Vertical load test . 25
5.1.3 Vacuum test . 26
5.1.4 Pit test . 27
5.2 Treatment efficiency . 29
5.2.1 General. 29
5.2.2 Installation and commissioning . 30
5.2.3 Operation and maintenance procedures during testing . 30
5.2.4 Data to be monitored . 30
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5.2.5 Time for biomass establishment . 31
5.2.6 Influent characteristics . 31
5.2.7 Daily flow pattern for testing . 31
5.2.8 Test procedure . 32
5.2.9 Sample analysis . 34
5.2.10 Test report . 35
5.3 Watertightness . 35
5.3.1 Water test . 35
5.3.2 Vacuum test . 36
5.4 Durability . 37
5.4.1 General . 37
5.4.2 Concrete . 37
5.4.3 Steel . 37
5.4.4 Unplasticized polyvinyl chloride (PVC-U) . 37
5.4.5 Polyethylene (PE) . 37
5.4.6 Glass reinforced plastic (GRP) . 38
5.4.7 Polypropylene (PP) . 39
5.4.8 Polydicyclopentadiene (PDCPD) . 40
5.4.9 Flexible sheets . 40
5.5 Reaction to fire . 41
6.1 General . 41
6.2 Type testing . 41
6.2.1 General . 41
6.2.2 Test samples, testing and compliance criteria . 42
6.2.3 Test reports . 48
6.2.4 Shared other party results . 48
6.2.5 Cascading determination of the product type results . 49
6.3 Factory production control . 50
6.3.1 General . 50
6.3.2 Requirements . 50
6.3.3 Product specific requirements . 53
6.3.4 Initial inspection of factory and of FPC . 54
6.3.5 Continuous surveillance of FPC . 54
6.3.6 Procedure for modifications . 54
6.3.7 One-off products, pre-production products (e.g. prototypes) and products produced
in very low quantity . 54
7.1 Marking . 55
7.2 Technical information accompanying the unit . 56
7.3 Installation instructions . 57
7.4 Operation and maintenance instructions . 57
Annex A (informative) Analysis method . 58
Annex B (normative) Mechanical characteristics of test samples used for load bearing
capacity calculation . 59
Annex C (normative) Alternative watertightness assessment methods for FPC (pneumatic
pressure test) . 60
Annex D (normative) Presentation of the microorganism’s test results . 61
Annex ZA (informative) Relationship of this European Standard with Regulation (EU)
No. 305/2011 . 62
Scope and relevant characteristics . 62
System of Assessment and Verification of Constancy of Performance (AVCP) . 82
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Assignment of AVCP tasks . 82
Bibliography . 85
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prEN 12566-6:2018 (E)
European foreword
This document (FprEN 12566-6:2018) has been prepared by Technical Committee CEN/TC 165 “Waste
water engineering”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 12566-6:2016.
In comparison with the previous edition, the following technical modification has been made:
• mainly changes in AVCP clause and Annex ZA in accordance with the Construction Product
Regulation (CPR) and changes in accordance with the CEN Rules.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements for construction works of
Regulation (EU) No. 305/2011.
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this
document.
The series of standards EN 12566 “Small wastewater treatment systems for up to 50 PT” contains the
following parts (see Figure 1):
• Part 1: Prefabricated septic tanks;
• Part 3: Packaged and/or site assembled domestic wastewater treatment plants;
• Part 6: Prefabricated secondary treatment unit (this document);
• Part 7: Prefabricated tertiary treatment unit
For filtration systems, CEN/TC 165 decided to publish the following CEN Technical reports, which are
considered as Code of practices and do not specify treatment requirements:
• Part 2: Soil infiltration systems
• Part 5: Pre-treated Effluent Filtration systems
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Key
A domestic wastewater 1 packaged and/or site assembled septic tank
B septic tank effluent 2 soil infiltration system
C treated infiltrated effluent 3 packaged and/or site assembled domestic wastewater treatment plant
D treated wastewater 5 pre-treated effluent filtration system
E tertiary treated wastewater 6 prefabricated treatment unit used for septic tank effluent
7 prefabricated tertiary treatment unit
Figure 1 — Scheme related to the arrangement of the parts of EN 12566
National regulations can specify different arrangements between the products described in the
standard series EN 12566.
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1 Scope
This document specifies characteristics and related requirements, assessment methods, the marking
and assessment and verification of constancy of performance (AVCP) procedures for prefabricated
secondary treatment units for populations up to 50 inhabitants.
Prefabricated secondary treatment units in accordance with this document are:
• used for the treatment of effluent from product in accordance with EN 12566-1;
Equivalent septic effluent may come from existing septic tanks.
• made of concrete, steel, Unplasticized Polyvinylchloride (PVC-U), Polyethylene (PE), Polypropylene
(PP), Glass Reinforced Polyester (GRP-UP), Polydicyclopentadiene (PDCPD), PVC and/or EPDM;
• used buried in the ground;
• with or without extension shaft;
• made of prefabricated components that are factory or site-assembled by one manufacturer and
which are tested as a whole.
This document does not cover prefabricated secondary treatment units:
• where vehicle loads apply to it;
• with direct infiltration into the ground (non-watertight);
• made of retrofit kits (see definition in 3.1.5).
The assessment methods specified in this European Standard establish the performance of the
prefabricated secondary treatment unit, needed to verify its suitability for the condition in which it is
normally installed.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 206, Concrete — Specification, performance, production and conformity
EN 580, Plastics piping systems — Unplasticized poly(vinyl chloride) (PVC-U) pipes — Test method for the
resistance to dichloromethane at a specified temperature (DCMT)
EN 727, Plastics piping and ducting systems — Thermoplastics pipes and fittings — Determination of
Vicat softening temperature (VST)
EN 976-1:1997, Underground tanks of glass-reinforced plastics (GRP) - Horizontal cylindrical tanks for
the non-pressure storage of liquid petroleum based fuels - Part 1: Requirements and test methods for single
wall tanks
EN 978:1997, Underground tanks of glass-reinforced plastics (GRP) - Determination of factor alpha and
factor beta
EN 1992-1-1, Eurocode 2: Design of concrete structures - Part 1-1: General rules and rules for buildings
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EN 1993-1-1, Eurocode 3: Design of steel structures - Part 1-1: General rules and rules for buildings
EN 1905, Plastics piping systems - Unplasticized poly(vinyl chloride) (PVC-U) pipes, fittings and material -
Method for assessment of the PVC content based on total chlorine content
EN 10088-1, Stainless steels - Part 1: List of stainless steels
EN 12311-2, Flexible sheets for waterproofing - Determination of tensile properties - Part 2: Plastic and
rubber sheets for roof waterproofing
EN 12566-1, Small wastewater treatment systems for up to 50 PT - Part 1: Prefabricated septic tanks
EN 13369, Common rules for precast concrete products
EN 13501-1, Fire classification of construction products and building elements — Part 1: Classification
using data from reaction to fire tests
EN 14150, Geosynthetic barriers - Determination of permeability to liquids
EN 16323:2014, Glossary of wastewater engineering terms
EN ISO 178, Plastics - Determination of flexural properties (ISO 178)
EN ISO 179 (all parts), Plastics — Determination of Charpy impact properties (ISO 179, all parts)
EN ISO 527-2, Plastics - Determination of tensile properties - Part 2: Test conditions for moulding and
extrusion plastics (ISO 527-2)
EN ISO 899-2, Plastics - Determination of creep behaviour - Part 2: Flexural creep by three-point loading
(ISO 899-2)
EN ISO 1133-1:2011, Plastics - Determination of the melt mass-flow rate (MFR) and melt volume-flow rate
(MVR) of thermoplastics - Part 1: Standard method (ISO 1133-1:2011)
EN ISO 1183 (all parts), Plastics — Methods for determining the density and relative density of non-
cellular plastics (ISO 1183, all parts)
EN ISO 2505:2005, Thermoplastics pipes - Longitudinal reversion - Test method and parameters (ISO
2505:2005)
EN ISO 2555, Plastics - Resins in the liquid state or as emulsions or dispersions - Determination of
apparent viscosity using a single cylinder type rotational viscometer method (ISO 2555)
EN ISO 9967, Thermoplastics pipes - Determination of creep ratio (ISO 9967)
EN ISO 9969, Thermoplastics pipes - Determination of ring stiffness (ISO 9969)
EN ISO 13229, Thermoplastics piping systems for non-pressure applications - Unplasticized poly(vinyl
chloride) (PVC-U) pipes and fittings - Determination of the viscosity number and K-value (ISO 13229)
EN ISO 14125:1998, Fibre-reinforced plastic composites - Determination of flexural properties (ISO
14125)
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3 Terms, definitions, symbols and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 16323:2014 and the following
apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1.1
end use
condition in which a prefabricated secondary treatment unit is normally installed
3.1.2
extension shaft
component(s) which is part of the prefabricated secondary treatment unit, and allow access from or
slightly above the ground surface
3.1.3
flexible sheet
flexible impermeable liner
3.1.4
product family
group of products in which, for evaluation, the selected property(s) is/are similar for all products
within the group considering at least similar shape, equipment, materials and conditions of end use and
ensures the minimum hydraulic efficiency and minimum structural behaviour for all the products in the
range
3.1.5
retrofit kit
set of components that are provided by a single manufacturer for installation within an existing septic
tank
3.2 Symbols and abbreviated terms
AVCP Assessment and Verification of Constancy of Performance
BOD (or BOD ) Biochemical oxygen demand at 5 or 7 days
5 7
COD Chemical oxygen demand
CPR Construction Products Regulation No 305/2011
CWFT Classified Without Further Testing
DoP Declaration of Performance
EPDM Ethylene Propylene Diene Monomer
FPC Factory Production Control
GRP Glass reinforced plastic
KN Kjeldahl Nitrogen
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MFR Melt mass-Flow Rate
NH -N Ammonium nitrogen
4
P Phosphorus
PDCPD Polydicyclopentadiene
PE Polyethylene
PP Polypropylene
PT Population total
PVC Polyvinyl Chloride
PVC-U Unplasticized Polyvinyl Chloride
Q Nominal hydraulic flow
N
SS Suspended solids
4 Product characteristics
4.1 Design
4.1.1 General
Prefabricated secondary treatment units shall be:
• structurally stable, durable, watertight and corrosion resistant, and
• provided with an alarm to indicate electrical, mechanical or hydraulic malfunction of the system,
and
4.1.2 Inlets, outlets, internal pipework and connections
The hydraulic design of the equipment, the internal pipework and connections shall ensure that no
back-flows, blockage or surcharging occur during normal operation.
Inlet and outlet pipes shall be compatible with pipe systems in accordance with European Standards.
4.1.3 Ventilation
The prefabricated secondary treatment unit and the inlet pipework shall be ventilated to prevent the
accumulation of fermentation gases.
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4.1.4 Access
The prefabricated secondary treatment unit shall be design
...