EN 12255-7:2002
(Main)Wastewater treatment plants - Part 7: Biological fixed-film reactors
Wastewater treatment plants - Part 7: Biological fixed-film reactors
This European Standard specifies the design principles and performance requirements for secondary treatment by biological fixed-film reactors at wastewater treatment plants for more than 50 PT.
The primary application is for wastewater treatment plants designed for the treatment of domestic and municipal wastewater.
Biological fixed film reactors include biological trickling filters, rotating biological contactors, submerged bed reactors and biofilters.
Differences in wastewater treatment throughout Europe have led to a variety of systems being developed. This standard gives fundamental informations about the systems; this standard has not attempted to specify all available systems.
Detailed information additional to that contained in this standard may be obtained by referring to the Bibliography.
Kläranlagen - Teil 7: Biofilmreaktoren
Diese Europäische Norm legt Grundsätze der Planung und Anforderungen an Biofilmre-aktoren als zweiten (biologischen) Reinigungsteil von Kläranlagen über 50 EW fest.
Die Anwendung bezieht sich in erster Linie auf Kläranlagen, die zum Reinigen von häuslichem und kommunalem Abwasser geplant werden.
Biofilmreaktoren umfassen Tropfkörper, Rotationstauchkörper, Biofilmreaktoren mit getauchtem Trägermaterial und biologische Filter.
Die Unterschiede in Planung und Bau von Kläranlagen in Europa haben zu einer Vielzahl von Anlagenausführungen geführt. Diese Europäische Norm enthält grundsätzliche Angaben zu den Anlagenausführungen; sie beschreibt jedoch nicht alle Einzelheiten jeder Ausführungsart.
Die in den Literaturhinweisen aufgeführten Unterlagen enthalten Einzelheiten und Hinweise, die im Rahmen dieser Norm verwendet werden dürfen.
Stations d'épuration - Partie 7: Réacteurs biologiques à cultures fixées
La présente Norme européenne spécifie les principes d'étude et les prescriptions de performances applicables au traitement secondaire des eaux usées par réacteurs biologiques à cultures fixées dans des stations d'épuration pour plus de 50 EH.
La principale application concerne les stations d'épuration conçues pour traiter des eaux usées domestiques et municipales.
Le terme réacteurs biologiques à cultures fixées recouvre les lits bactériens, les disques et tambours biologiques, les réacteurs à lit immergé et les biofiltres.
Des différences en matière de traitement des eaux usées résiduaires à travers l'Europe ont conduit au développement de systèmes variés. La présente norme donne les informations de base sur les systèmes et n' a pas eu pour objectif d'essayer de spécifier tous les systèmes disponibles.
Des informations détaillées, complémentaires à celles contenues par la présente norme, peuvent être obtenues en se reportant à la bibliographie.
Čistilne naprave za odpadno vodo – 7. del: Biološki reaktorji s pritrjeno biomaso
General Information
- Status
- Published
- Publication Date
- 15-Jan-2002
- Technical Committee
- CEN/TC 165 - Waste water engineering
- Drafting Committee
- CEN/TC 165/WG 40 - Wastewater treatment plants > 50 PT
- Current Stage
- 9092 - Decision on results of review/2YR ENQ - revise - Review Enquiry
- Start Date
- 31-Aug-2022
- Completion Date
- 14-Apr-2025
Relations
- Effective Date
- 28-Jan-2023
- Effective Date
- 22-Dec-2008
Overview
EN 12255-7:2002 is the CEN European Standard that specifies design principles and performance requirements for secondary treatment using biological fixed‑film reactors at wastewater treatment plants sized for more than 50 PT (population equivalents). Its primary scope covers treatment of domestic and municipal wastewater and includes the main fixed‑film technologies: trickling filters, rotating biological contactors (RBCs), submerged bed reactors and biofilters. The standard provides fundamental guidance rather than an exhaustive catalogue of all system variants.
Key topics and technical requirements
- Types of fixed‑film processes: descriptions and operating principles for trickling filters, RBCs, submerged bed reactors and biofilters.
- Design parameters: recommended operational metrics such as volumetric loading (kg/m3·d), mass surface loading (kg/m2·d), surface loading rate (m3/m2·h), recirculation ratios and flushing intensity.
- Support media selection: guidance on media materials, voidage and specific surface area limits (examples given for high‑rate and nitrifying stages and for suspended media).
- Aeration and oxygen supply: requirements for even air distribution in submerged beds and blower systems.
- Flow distribution and hydraulics: avoidance of dead zones, uniform distribution through beds, head loss minimisation and flow‑distribution equipment (e.g., rotary distributors).
- Solids handling and clarification: need for humus tanks or final clarification depending on process; backwashing considerations for different media types.
- Modes of operation: single‑stage, two‑stage and alternating double filtration arrangements; options for carbonaceous oxidation, nitrification and denitrification (including recirculation and external carbon dosing where required).
- Planning and reliability: multiple lines/units for operational resilience, sludge treatment/disposal, measurement and control, and structural and equipment design.
Practical applications and users
EN 12255-7:2002 is used by:
- Municipal and regional wastewater engineers designing secondary treatment for small to medium plants (>50 PT).
- Consulting engineers and designers selecting fixed‑film technologies (trickling filters, RBCs, submerged beds, biofilters).
- Plant operators and asset managers implementing operational controls, aeration, backwash and clarification strategies.
- Equipment manufacturers and suppliers of media, distributors, blowers and mechanical components.
- Regulators and procurement teams specifying performance and compliance requirements.
Related standards
- EN 12255 series (Parts 1, 6, 10, 11) - general plant requirements, activated sludge, safety, data.
- EN 1085 - wastewater treatment vocabulary.
- EN 752‑6 - pumping installations (relevant for recirculation and dosing).
- Bibliography in EN 12255‑7 provides additional detailed references.
EN 12255‑7:2002 is a practical reference for engineers and operators seeking standardized guidance on designing and operating biological fixed‑film reactors in municipal wastewater treatment.
Frequently Asked Questions
EN 12255-7:2002 is a standard published by the European Committee for Standardization (CEN). Its full title is "Wastewater treatment plants - Part 7: Biological fixed-film reactors". This standard covers: This European Standard specifies the design principles and performance requirements for secondary treatment by biological fixed-film reactors at wastewater treatment plants for more than 50 PT. The primary application is for wastewater treatment plants designed for the treatment of domestic and municipal wastewater. Biological fixed film reactors include biological trickling filters, rotating biological contactors, submerged bed reactors and biofilters. Differences in wastewater treatment throughout Europe have led to a variety of systems being developed. This standard gives fundamental informations about the systems; this standard has not attempted to specify all available systems. Detailed information additional to that contained in this standard may be obtained by referring to the Bibliography.
This European Standard specifies the design principles and performance requirements for secondary treatment by biological fixed-film reactors at wastewater treatment plants for more than 50 PT. The primary application is for wastewater treatment plants designed for the treatment of domestic and municipal wastewater. Biological fixed film reactors include biological trickling filters, rotating biological contactors, submerged bed reactors and biofilters. Differences in wastewater treatment throughout Europe have led to a variety of systems being developed. This standard gives fundamental informations about the systems; this standard has not attempted to specify all available systems. Detailed information additional to that contained in this standard may be obtained by referring to the Bibliography.
EN 12255-7:2002 is classified under the following ICS (International Classification for Standards) categories: 13.060.30 - Sewage water. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 12255-7:2002 has the following relationships with other standards: It is inter standard links to FprEN 12255-7; is excused to EN 12255-13:2002. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 12255-7:2002 is associated with the following European legislation: EU Directives/Regulations: 93/38/EEC; Standardization Mandates: M/BC/CEN/88/15. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kläranlagen - Teil 7: BiofilmreaktorenStations d'épuration - Partie 7: Réacteurs biologiques a cultures fixéesWastewater treatment plants - Part 7: Biological fixed-film reactors13.060.30Odpadna vodaSewage waterICS:Ta slovenski standard je istoveten z:EN 12255-7:2002SIST EN 12255-7:2002en01-december-2002SIST EN 12255-7:2002SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 12255-7January 2002ICS 13.060.30English versionWastewater treatment plants - Part 7: Biological fixed-filmreactorsStations d'épuration - Partie 7: Réacteurs biologiques àcultures fixéesKläranlagen - Teil 7: BiofilmreaktorenThis European Standard was approved by CEN on 9 November 2001.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2002 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 12255-7:2002 ESIST EN 12255-7:2002
1) In preparation.SIST EN 12255-7:2002
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The EN 12255-7:2002 standard provides a comprehensive framework for the design principles and performance requirements related to biological fixed-film reactors used in wastewater treatment plants, specifically for facilities that serve populations greater than 50 population equivalents (PT). This standard is particularly relevant for the treatment of domestic and municipal wastewater, which is a critical consideration in modern wastewater management. One of the key strengths of this standard is its inclusive approach to biological fixed-film reactors, encompassing various technologies such as biological trickling filters, rotating biological contactors, submerged bed reactors, and biofilters. By covering multiple methods of biological treatment, the standard allows for flexibility and adaptability in wastewater treatment plant design, catering to the diverse needs and conditions across Europe. Furthermore, the EN 12255-7:2002 recognizes the variations in wastewater treatment approaches throughout European regions, providing a foundational understanding without limiting the scope to a single methodology. This aspect enhances its applicability, making it a vital resource for engineers and designers tasked with upgrading or implementing new systems in wastewater treatment plants. Additionally, the standard's performance requirements ensure that the implemented systems can achieve satisfactory treatment levels, thus safeguarding public health and environmental quality. While it does not claim to encapsulate all existing biological fixed-film technologies, it serves as a pivotal reference point for best practices in the field. Overall, the EN 12255-7:2002 standard stands out for its clarity, practical scope, and relevance to contemporary biological wastewater treatment, making it an indispensable guide for stakeholders invested in effective wastewater treatment solutions. Detailed information can be further explored through the Bibliography, complementing the foundational insights provided within the standard itself.
La norme EN 12255-7:2002 constitue une référence essentielle dans le domaine du traitement des eaux usées, particulièrement pour les stations d'épuration de plus de 50 équivalents habitants (EH). Son champ d'application se concentre sur les réacteurs biologiques à film fixe, offrant ainsi des principes de conception et des exigences de performance cruciales pour le traitement secondaire des eaux usées domestiques et municipales. Une des forces majeures de cette norme est sa capacité à intégrer divers types de systèmes de traitement, tels que les filtres biologiques à écoulement, les contacteurs biologiques rotatifs, les réacteurs à lit immergé et les biofiltres. Cela permet aux ingénieurs et aux professionnels du secteur de disposer d'une vue d'ensemble cohérente et méthodique des solutions disponibles pour traiter les eaux usées, tout en tenant compte des spécificités et des diversités observées à travers l'Europe. En raison des différences importantes dans le traitement des eaux usées au sein des différents pays européens, cette norme évite de prescrire tous les systèmes existants, se concentrant plutôt sur les concepts fondamentaux qui peuvent être adaptés selon les besoins particuliers de chaque infrastructure. Cela souligne la pertinence et l'applicabilité de la norme, offrant une flexibilité indispensable dans le domaine du traitement des eaux usées. En se basant sur le contenu de la norme, les utilisateurs peuvent facilement accéder à des informations supplémentaires, renforçant l'utilité et la profondeur de la documentation pour ceux qui cherchent à approfondir leur compréhension des systèmes de traitement biologique à film fixe. Ainsi, la norme EN 12255-7:2002 se positionne comme un document incontournable pour les professionnels impliqués dans la conception et l'exploitation de stations d'épuration, en fournissant des lignes directrices fiables et des exigences claires pour assurer un traitement efficace des eaux usées.
표준 EN 12255-7:2002는 생물학적 고정-film 반응기(Biological fixed-film reactors)를 이용한 폐수 처리에 대한 설계 원칙과 성능 요구 사항을 규정하고 있습니다. 이 표준의 범위는 50 PT 이상의 폐수 처리 시설에 적용되며, 주로 가정용 및 도시 폐수 처리를 목적으로 합니다. 이 표준의 강점 중 하나는 생물학적 트리클링 필터(Biological trickling filters), 회전 생물학적 접촉기(Rotating biological contactors), 잠수형 반응기(Submerged bed reactors), 그리고 바이오필터(Biofilters) 등 다양한 생물학적 고정-film 반응기의 설계를 포괄한다는 점입니다. 이에 따라, 엔지니어와 설계자는 유럽 내에서 기존의 다양한 폐수 처리 시스템의 차이를 이해하고, 각 시스템에 적합한 적용 방안을 모색할 수 있는 기초 정보를 제공받을 수 있습니다. 더욱이, 유럽 각국의 폐수 처리 방식의 차이로 인해 개발된 여러 시스템에 대한 기본적인 정보도 포함되어 있어, 사용자들은 추가적인 문헌을 통해 보다 깊이 있는 데이터와 정보를 확보할 수 있습니다. 이 표준은 폐수 처리 분야에서의 혁신과 발전을 위한 기초 자료를 제공하여, 따라서 생물학적 고정-film 반응기 시스템의 설계 및 운영에 있어 매우 중요합니다. EN 12255-7:2002 표준은 폐수 처리 시설의 효율성을 높이는 데 기여하며, 지속 가능한 환경 관리를 위해 필수적인 기준이 됩니다. 표준을 준수함으로써, 폐수 처리의 품질이 개선되고, 사용자들이 보다 신뢰할 수 있는 데이터를 기반으로 작업을 수행할 수 있게 됩니다.
Die EN 12255-7:2002 bietet eine umfassende Standardisierung für biologische Feststoffreaktoren in Abwasserbehandlungsanlagen, die für die Behandlung von mehr als 50 PT konzipiert sind. Der Umfang dieser Norm umfasst die Designprinzipien und Leistungsanforderungen, die für die sekundäre Behandlung von Abwasser erforderlich sind, und richtet sich hauptsächlich an Kläranlagen, die häusliches und kommunales Abwasser verarbeiten. Eine der Stärken dieses Standards liegt in der Berücksichtigung verschiedener Technologien wie biologische Tropfkörper, rotierende biologische Kontaktoren, untergetauchte Bettreaktoren und Biofilter. Dies unterstützt die Anlagenbetreiber dabei, geeignete Technologien für ihre spezifischen Anforderungen auszuwählen und anzuwenden, wodurch die Effizienz der Abwasserbehandlung verbessert wird. Die EN 12255-7:2002 ist besonders relevant für die Branche, da sie den Benutzern grundlegende Informationen zu den unterschiedlichsten Systemen und deren Anwendungsbereichen bereitstellt. Dies ist besonders wichtig in Anbetracht der Vielzahl an in Europa entwickelten Systemen zur Abwasserbehandlung, da es oft Abweichungen in der Implementierung und Gestaltung gibt. Darüber hinaus wird in der Norm darauf hingewiesen, dass nicht alle verfügbaren Systeme spezifiziert werden können, wodurch sie den Rahmen für weitere Forschungen und Entwicklungen in der Branche eröffnet. Durch die Bereitstellung spezifischer Richtlinien und Anforderungen trägt dieser Standard dazu bei, die Qualität der Abwasserbehandlung zu verbessern und die Umweltbelastungen zu minimieren. Die Möglichkeit, auf weiterführende Informationen in der Bibliographie zuzugreifen, ergänzt die Standardinhalte und bietet den Fachleuten in der Branche zusätzliche Ressourcen zur Vertiefung. Daher ist die EN 12255-7:2002 ein unverzichtbares Dokument für alle, die im Bereich der Abwasserbehandlung tätig sind.
EN 12255-7:2002は、50 PT以上の廃水処理プラントにおける生物固定膜反応器による二次処理の設計原則と性能要件を規定した欧州規格です。この標準は、家庭用および公共用廃水の処理を目的とした廃水処理プラントに主に適用されます。 この規格の大きな強みは、生物固定膜反応器、具体的には生物トリクルフィルター、回転生物接触体、沈水床反応器、およびバイオフィルターを含む多様な技術の基本的な情報を提供している点です。さらに、ヨーロッパ各国における廃水処理の違いを反映し、さまざまなシステムの開発を可能にしています。これにより、効果的かつ適切なシステム選定を行うための指針を提供します。 また、この規格はすべての利用可能なシステムを網羅するものではなく、各国で採用される様々なアプローチを理解するためのフレームワークを示しています。そのため、特定の状況に合った技術的解決策を選定する際の参考になります。 EN 12255-7:2002は、廃水処理プラントの設計者や運営者にとって不可欠のガイドラインとなっており、生態系保護や水質改善に向けた効果的な技術の導入を促進する重要な役割を果たしています。標準文書に記載されている詳細情報に加え、文献リストを参照することで、さらなる情報を取得することも可能です。
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