The European Committee for Standardization is one of three European Standardization Organizations (together with CENELEC and ETSI) that have been officially recognized by the European Union and by the European Free Trade Association (EFTA) as being responsible for developing and defining voluntary standards at European level.
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Reference | EN 12255-4:2023 |
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Title | Wastewater treatment plants - Part 4: Primary treatment |
Work Item Number | 00165323 |
Abstract/Scope | 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. |
Status |
Published
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Reference Document | |
date of Availability (DAV) | 2023-03-01 |
ICS | 13.060.30 - Sewage water |
A-Deviation(s) | |
Special National Condition(s) |
Directive(s) | |
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Mandate(s) | |
Citation in OJEU |
date of Ratification (DOR) (1) | 2023-01-09 |
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date of Availability (DAV) (2) | 2023-03-01 |
date of Announcement (DOA) (3) | 2023-06-30 |
date of Publication (DOP) (4) | 2023-09-30 |
date of Withdrawal (DOW) (5) | 2023-09-30 |
Supersedes | EN 12255-4:2002 |
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Superseded by | |
Normative reference (6) |
EN 12255-1
EN 12255-10 EN 16323:2014 |
Sales Points |
(1) Date of ratification (dor) date when the Technical Board notes the approval of an EN (and HD for CENELEC), from which time the standard may be said to be approved
(2) Date of availability (dav) date when the definitive text in the official language versions of an approved CEN/CENELEC publication is distributed by the Central Secretariat
(3) Date of announcement (doa) latest date by which the existence of an EN (and HD for CENELEC), a TS or a CWA has to be announced at national level
(4) Date of publication (dop) latest date by which an EN has to be implemented at national level by publication of an identical national standard or by endorsement
(5) Date of withdrawal (dow) latest date by which national standards conflicting with an EN (and HD for CENELEC) have to be withdrawn
(6) This list of normative references is purely indicative. The only official list of normative reference is the list of the published standard.
In the case of undated standard, a link to the last dated version is provided.
In the case of series, a link to each standard identified in the series is provided.
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