EN 12255-4:2023

Wastewater treatment plants - Part 4: Primary treatment

This document specifies the design requirements for plant and equipment to remove solids, other than screenings and grit, from raw wastewater, at wastewater treatment plants for over 50 PT.
It includes primary treatment with sedimentation, fine screens and micro-screens.
NOTE 1   The removal of screenings and grit is covered in EN 12255-3.
NOTE 2   Dissolved air flotation (DAF) is not covered in detail in this document because it is not commonly used for primary treatment in municipal wastewater treatment plants. It can be used for primary treatment of industrial wastewater, but then the design is specific to the application.

Kläranlagen - Teil 4: Vorklärung

Dieses Dokument legt die Auslegungsanforderungen für Anlagen und technische Ausrüstung zum Entfernen von anderen Feststoffen als Rechengut und Sandfanggut aus Rohabwasser in Kläranlagen für über 50 EW fest.
Dies schließt Vorklärung durch Sedimentation, Feinsiebe und Mikrosiebe ein.
ANMERKUNG 1   Die Entfernung von Rechengut und Sandfanggut ist in EN 12255 3 beschrieben.
ANMERKUNG 2   Die Entspannungsflotation (DAF, en: dissolved air flotation) ist in diesem Dokument nicht im Detail beschrieben, da sie bei der Vorklärung in kommunalen Kläranlagen nicht gebräuchlich ist. Sie kann bei der Vorklärung von Industrieabwasser eingesetzt werden, wobei die Auslegung dann spezifisch an diese Anwendung angepasst wird.

Stations d’épuration - Partie 4 : Traitement primaire

Le présent document spécifie les exigences de conception des installations et des équipements destinés à éliminer les matières solides, autres que les refus de dégrillage et le sable, des eaux usées brutes, dans les stations d’épuration de plus de 50 équivalents habitants (EH).
Il inclut le traitement primaire par sédimentation, dégrilleurs fins et micro tamis.
NOTE 1   L’élimination des refus de dégrillage et le dessablage sont traités dans l’EN 12255 3.
NOTE 2   La flottation à l’air dissous (FAD) n’est pas détaillée dans le présent document car cette technique est peu employée pour le traitement primaire dans les stations d’épuration des eaux usées municipales. Elle peut être utilisée pour le traitement primaire des eaux usées industrielles mais la conception est, dans ce cas, spécifique à l’application.

Čistilne naprave za odpadno vodo - 4. del: Primarni usedalnik

Ta dokument določa zahteve v zvezi s projektiranjem čistilne naprave in opreme za odstranjevanje trdnih nečistoč, ki ni vključuje precejanja ali posipavanja, iz neobdelane odpadne vode v čistilnih napravah za odpadne vode za več kot 50 populacijskih ekvivalentov (PE).
Vključuje primarno obdelavo s sedimentacijo, finim precejanjem in mikro precejanjem.
OPOMBA 1:   Odstranjevanje elementov za precejanje in posipavanje je zajeto v 3. delu standarda EN 12255.
OPOMBA 2:   Flotacija z raztopljenim zrakom (DAF) ni podrobno zajeta v tem dokumentu, saj se je ne uporablja pogosto pri primarni obdelavi čistilnih naprav za komunalne odpadne vode. Ta postopek se lahko uporablja za primarno obdelavo industrijskih odpadnih voda, vendar pa je zasnova v tem primeru specifična.

General Information

• Status: Published
• Publication Date: 28-Feb-2023
• ICS: 13.060.30 - Sewage water
• Technical Committee: CEN/TC 165 - Waste water engineering
• Drafting Committee: CEN/TC 165/WG 40 - Wastewater treatment plants > 50 PT
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 01-Mar-2023
• Due Date: 08-Jul-2022
• Completion Date: 01-Mar-2023
• Directive: 93/38/EEC - Procurement procedures of entities operating in the water, energy, transport and telecommunications sectors
• Mandate: M/BC/CEN/88/15 - Standardization request to CEN/CENELEC in the field of Water supply, drainage and sewerage
• Ref Project: SIST EN 12255-4:2023 - Wastewater treatment plants - Part 4: Primary treatment

Relations

• Replaces: EN 12255-4:2002 - Wastewater treatment plants - Part 4: Primary settlement
• Effective Date: 19-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 12255-4:2023
01-maj-2023
Nadomešča:
SIST EN 12255-4:2002
Čistilne naprave za odpadno vodo - 4. del: Primarni usedalnik
Wastewater treatment plants - Part 4: Primary treatment
Kläranlagen - Teil 4: Vorklärung
Stations d’épuration - Partie 4 : Traitement primaire
Ta slovenski standard je istoveten z: EN 12255-4:2023
ICS:
13.060.30 Odpadna voda Sewage water
SIST EN 12255-4:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 12255-4:2023

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SIST EN 12255-4:2023


EN 12255-4
EUROPEAN STANDARD

NORME EUROPÉENNE

March 2023
EUROPÄISCHE NORM
ICS 13.060.30 Supersedes EN 12255-4:2002
English Version

Wastewater treatment plants - Part 4: Primary treatment
Stations d'épuration - Partie 4 : Traitement primaire Kläranlagen - Teil 4: Vorklärung
This European Standard was approved by CEN on 9 January 2023.

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. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.

This European Standard exists 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12255-4:2023 E
worldwide for CEN national Members.

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SIST EN 12255-4:2023
EN 12255-4:2023 (E)
Contents Page
European foreword . 3
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Symbols and abbreviations . 7
5 Requirements . 7
5.1 General . 7
5.2 Planning . 8
5.2.1 Required Data and Information . 8
5.2.2 Advantages and Disadvantages of Primary Treatment Systems . 10
5.2.3 Performance . 11
5.3 Design . 12
5.3.1 General . 12
5.3.2 Specifications .
...