EN 14702-1:2006

Characterisation of sludges - Settling properties - Part 1: Determination of settleability (Determination of the proportion of sludge volume and sludge volume index)

This document specifies a method for the determination of the settleability of sludge suspensions. This document is applicable to sludge suspensions from:
¾   storm water handling;
¾   urban wastewater collecting systems;
¾   urban wastewater treatment plants;
¾   treating industrial wastewater similar to urban wastewater (as defined in Directive 91/271 EEC);
¾   water supply treatment plants.
This method is also applicable to sludge suspensions from other origin.

Charakterisierung von Schlämmen - Absetzeigenschaften - Teil 1: Bestimmung der Absetzbarkeit (Bestimmung des Schlammvolumens und des Schlammvolumenindexes)

Dieses  Dokument  legt  ein  Verfahren  zur  Bestimmung  der  Absetzbarkeit  von  Schlammsuspensionen  fest.
Dieses Dokument gilt für Schlammsuspensionen aus folgenden Bereichen:
-  Behandlung von Regenwasser;
-  Kanalisationssysteme für kommunales Abwasser;
-  Anlagen für die Behandlung von kommunalem Abwasser;
-  Behandlung  von  industriellem  Abwasser,  die  auf  ähnliche  Weise  erfolgt  wie  die  von  kommunalem
Abwasser (wie in der Richtlinie 91/271/EWG festgelegt);
-  Aufbereitungsanlagen für die Wasserversorgung.
Dieses Verfahren ist auch auf Schlammsuspensionen von anderer Herkunft anwendbar.

Caractérisation des boues - Propriétés de sédimentation - Partie 1: Détermination de l'aptitude à la sédimentation (Détermination du volume de boues et de l'indice de boues)

Le présent document spécifie une méthode de détermination de l’aptitude à la sédimentation de suspensions de boues. Il s’applique aux suspensions de boues provenant :
-   de la collecte des eaux pluviales ;
-   des systèmes de collecte des eaux usées urbaines ;
-   des stations d’épuration des eaux usées urbaines ;
-   de l’épuration des eaux industrielles semblables aux eaux usées urbaines comme défini dans la Directive 91/271/CEE) ;
-   des usines de production d’eau potable.
Cette méthode s’applique également aux suspensions de boues ayant une autre origine.

Karakterizacija blata - Lastnosti usedanja – 1. del: Določevanje usedljivosti (določevanje deleža volumna blata in volumskega indeksa blata)

General Information

• Status: Published
• Publication Date: 28-Mar-2006
• Withdrawal Date: 29-Sep-2006
• ICS: 13.030.20 - Liquid wastes. Sludge
• Technical Committee: CEN/TC 308 - Characterization of sludges
• Drafting Committee: CEN/TC 308/WG 1 - Characterization methods
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 09-Jun-2021
• Completion Date: 14-Apr-2025
• Directive: 86/278/EEC - Protection of the environment, and in particular of the soil, when sewage sludge is used in agriculture
• Ref Project: SIST EN 14702-1:2006 - Characterisation of sludges - Settling properties - Part 1: Determination of settleability (Determination of the proportion of sludge volume and sludge volume index)

Overview

EN 14702-1:2006 is a European Standard developed by CEN that specifies a reliable method for determining the settleability and settling properties of sludge suspensions. This standard focuses on the measurement of the proportion of sludge volume and the sludge volume index (SVI) after sedimentation. It is essential for assessing the behavior of sludge in wastewater and stormwater treatment processes. The method applies to sludge suspensions originating from:

• Storm water handling systems
• Urban wastewater collection systems
• Urban wastewater treatment plants
• Industrial wastewater treatment similar to urban wastewater as per Directive 91/271/EEC
• Water supply treatment plants
• Other sludge suspension sources

Through standardized procedures, EN 14702-1:2006 provides a means to quantitatively evaluate sludge settleability, which is crucial for optimizing treatment plant performance and sludge management.

Key Topics

• Settleability: The ability of sludge solids to separate from water through sedimentation under gravity.
• Settled Sludge Volume: The volume occupied by sludge solids after 30 minutes of settling, measured in milliliters per liter (ml/l).
• Sludge Volume Index (SVI): Calculated as the settled sludge volume divided by the concentration of dry solids in the sludge (ml/g), representing sludge compaction and settleability characteristics.
• Sampling and Preparation: Procedure involves collecting a representative 1-liter sludge sample, allowing it to settle undisturbed for 30 minutes, and measuring the settled sludge volume. Dilutions may be necessary for samples with high sludge volume.
• Precision and Validation: The method includes defined repeatability and reproducibility criteria backed by multi-laboratory validation trials, ensuring accurate and consistent results.
• Relevant Apparatus: Use of a graduated cylinder (1,000 ml capacity) or Imhoff cone for volume measurements, coupled with standards for solids concentration determination (EN 872 and EN 12880).
• Interferences and Best Practices: Procedures to minimize sample disturbance, temperature effects, and vessel wall influences promoting accurate sedimentation readings.

Applications

EN 14702-1:2006 is vital for wastewater treatment professionals, environmental engineers, and laboratory analysts working with sludge characterization. The standardized settleability test is applied in:

• Design and operation of settling tanks and clarifiers by providing quantitative data on sludge settling rates and volumes.
• Performance evaluation of urban wastewater and stormwater management facilities to optimize sludge handling and improve treatment outcomes.
• Industrial wastewater treatment plants that process sludge similar in nature to municipal wastewater.
• Water supply treatment facilities monitoring sludge treatment efficacy.
• Operational monitoring programs that require routine sludge settleability measurements to ensure treatment compliance and process optimization.

Using this standard ensures consistent assessment of sludge behavior, facilitates regulatory compliance, and supports effective environmental management of sludge byproducts.

Related Standards

• EN 872: Water quality - Determination of suspended solids - Method by filtration through glass fibre filters
• EN 12880: Characterization of sludges - Determination of dry residue and water content
• EN 1085:1997: Waste water treatment - Vocabulary
• Directive 91/271/EEC: Council Directive concerning urban wastewater treatment standards
• ISO 5725-2: Defines accuracy, repeatability, and reproducibility for measurement methods, referenced in validation of this method.

These complementary standards assist in comprehensive sludge characterization and quality control in water and wastewater treatment processes.

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Keywords: EN 14702-1:2006, sludge settleability, sludge volume index, sludge settling properties, wastewater treatment, storm water handling, sludge characterization, sludge volume determination, sludge testing standard, sedimentation of sludge, wastewater sludge analysis.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Characterisation of sludges - Settling properties - Part 1: Determination of settleability (Determination of the proportion of sludge volume and sludge volume index)XVHGOMLYRVWLCaractérisation des boues - Propriétés de sédimentation - Partie 1: Détermination de l'aptitude a la sédimentation (Détermination du volume de boues et de l'indice de boues)Charakterisierung von Schlämmen - Absetzeigenschaften - Teil 1: Bestimmung der Absetzbarkeit (Bestimmung des Schlammvolumens und des Schlammvolumenindexes)Ta slovenski standard je istoveten z:EN 14702-1:2006SIST EN 14702-1:2006en,fr,de13.030.20ICS:SLOVENSKI
STANDARDSIST EN 14702-1:200601-julij-2006

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14702-1March 2006ICS 13.030.20 English VersionCharacterisation of sludges - Settling properties - Part 1:Determination of settleability (Determination of the proportion ofsludge volume and sludge volume index)Caractérisation des boues - Propriétés de sédimentation -Partie 1: Détermination de l'aptitude à la sédimentation(Détermination du volume de boues et de l'indice de boues)Charakterisierung von Schlämmen - Absetzeigenschaften -Teil 1: Bestimmung der Absetzbarkeit (Bestimmung desSchlammvolumens und des Schlammvolumenindexes)This European Standard was approved by CEN on 3 February 2006.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 Central Secretariat 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 Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14702-1:2006: E

Results of validation trials.8 Bibliography.12
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