EN 14701-3:2006

Characterization of sludges - Filtration properties - Part 3: Determination of the compressibility

This document specifies a method to determine the compressibility of sludges, conditioned or not.
This document is applicable to sludges and sludge suspensions from:
   storm water handling;
   urban wastewater collecting systems;
   urban wastewater treatment plants;
   treating industrial wastewater similar to urban wastewater (as defined in Directive 91/271/EEC);
   water supply treatment plants.
This method is also applicable to sludge and sludge suspensions of other origin.

Charakterisierung von Schlämmen - Filtrationseigenschaften - Teil 3: Bestimmung der Kompressibilität

Dieses Dokument legt ein Verfahren zur Bestimmung der Kompressibilität von konditionierten als auch
unkonditionierten Schlämmen fest.
Es gilt für Schlämme und 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 anderer Herkunft anwendbar.

Caractérisation des boues - Propriétés de filtration - Partie 3 : Détermination de la compressibilité

Ce document spécifie une méthode pour la détermination de la compressibilité de boues conditionnées ou non.
Ce document s’applique aux boues et 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 ;
-  des stations d’épuration des eaux industrielles assimilées (telles que définies 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 – Filtracijske lastnosti – 3. del: Določanje stisljivosti

General Information

• Status: Published
• Publication Date: 27-Jun-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: 13-Jun-2022
• 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 14701-3:2006 - Characterization of sludges - Filtration properties - Part 3: Determination of the compressibility

Overview

EN 14701-3:2006 specifies a laboratory method for determining the compressibility of sludges, a key filtration property used in sludge characterization. The standard applies to conditioned or unconditioned sludges and sludge suspensions from stormwater systems, urban wastewater collection and treatment, industrial wastewaters similar to urban wastewater (Directive 91/271/EEC), and water supply treatment plants - and can be applied to sludges from other origins. Results help define suitable operating pressures for filtration and support scale-up and performance evaluation of full-scale filtration devices.

Key Topics and Requirements

• Principle: Measure the specific resistance to filtration (r) at different applied pressures (p) and derive compressibility from the pressure dependence of r.
• Test procedure: Follow the specific-resistance test defined in EN 14701-2; perform measurements at a minimum of three pressures. Suggested pressures: 50 kPa, 150 kPa, 500 kPa.
• Result expression: Calculate the compressibility coefficient (s) from the slope of a log-log plot of r versus p (s is the slope obtained from log r vs. log p). Equation forms and a two-point calculation method are provided in the standard.
• Interpretation: Values of s > 1 indicate that specific resistance increases more than proportionally with pressure - suggesting operation at high pressures is not advisable.
• Apparatus and precision: The filtration apparatus and precision requirements reference EN 14701-2. Precision of compressibility results is tied to the precision of the specific-resistance measurements.
• Test report: Required content includes reference to the standard, sample identification, method reference, test results, and any deviations or factors affecting results.

Applications

• Process optimization: Select the best pressure range for belt presses, vacuum filters, plate-and-frame filters, and centrifuge feed conditioning.
• Design and scale-up: Use compressibility data with specific resistance results to predict full-scale filtration performance and cake formation behavior.
• Quality control and R&D: Compare sludge behavior before/after conditioning (polymer dosing, dewatering aids) and assess treatment changes.
• Stakeholders: Environmental laboratories, wastewater treatment operators, process engineers, equipment manufacturers, and regulatory bodies.

Related Standards

• EN 14701-2:2006 - Determination of the specific resistance to filtration (referenced for apparatus and procedure).
• EN 12832:1999 - Vocabulary for sludge characterization.

Keywords: EN 14701-3:2006, compressibility of sludges, filtration properties, specific resistance to filtration, sludge characterization, wastewater treatment, sludge testing, compressibility coefficient.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Characterization of sludges - Filtration properties - Part 3: Determination of the compressibilityCaractérisation des boues - Propriétés de filtration - Partie 3 : Détermination de la compressibilitéCharakterisierung von Schlämmen - Filtrationseigenschaften - Teil 3: Bestimmung der KompressibilitätTa slovenski standard je istoveten z:EN 14701-3:2006SIST EN 14701-3:2006en,fr,de13.030.20ICS:SLOVENSKI
STANDARDSIST EN 14701-3:200601-september-2006

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14701-3June 2006ICS 13.030.20 English VersionCharacterization of sludges - Filtration properties - Part 3:Determination of the compressibilityCaractérisation des boues - Propriétés de filtration - Partie3 : Détermination de la compressibilitéCharakterisierung von Schlämmen -Filtrationseigenschaften - Teil 3: Bestimmung derKompressibilitätThis European Standard was approved by CEN on 24 May 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 14701-3:2006: E
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