SIST EN 14701-2:2006

Characterization of sludges - Filtration properties - Part 2: Determination of the specific resistance to filtration

This document specifies a method for determining the specific resistance to filtration of sludges, conditioned or non-conditioned.
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 origins.

Charakterisierung von Schlämmen - Filtrationseigenschaften - Teil 2: Bestimmung des spezifischen Filtrationswiderstands

Dieses Dokument legt ein Verfahren zur Bestimmung des spezifischen Filtrationswiderstandes von konditionierten
als auch unkonditionierten Schlämmen fest.
Dieses Dokument 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 en filtration - Partie 2 : Détermination de la résistance specifique a la filtration

Le présent document spécifie une méthode de détermination de la résistance spécifique a la filtration des boues, conditionnées ou non.
Il s’applique aux boues et aux boues en suspension provenant de :
-   la collecte des eaux de pluie ;
-   des systemes 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 (telle que définie dans la Directive 91/271/CEE) ;
-   des usines de production d’eau potable.
Cette méthode peut également etre appliquée aux boues et aux boues en suspension d’une autre provenance.

Karakterizacija blata – Filtracijske lastnosti – 2. del: Določanje specifične odpornosti do filtriranja

General Information

• Status: Withdrawn
• Publication Date: 31-Aug-2006
• Withdrawal Date: 18-Jun-2013
• ICS: 13.030.20 - Liquid wastes. Sludge
• Technical Committee: KAT - Soil quality
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 18-Jun-2013
• Due Date: 11-Jul-2013
• Completion Date: 19-Jun-2013
• Directive: 86/278/EEC - Protection of the environment, and in particular of the soil, when sewage sludge is used in agriculture
• Ref Project: EN 14701-2:2006 - Characterization of sludges - Filtration properties - Part 2: Determination of the specific resistance to filtration

Relations

• Replaced By: SIST EN 14701-2:2013 - Characterisation of sludges - Filtration properties - Part 2: Determination of the specific resistance to filtration
• Effective Date: 01-Jul-2013

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Characterization of sludges - Filtration properties - Part 2: Determination of the specific resistance to filtrationCaractérisation des boues - Propriétés en filtration - Partie 2 : Détermination de la résistance specifique a la filtrationCharakterisierung von Schlämmen - Filtrationseigenschaften - Teil 2: Bestimmung des spezifischen FiltrationswiderstandsTa slovenski standard je istoveten z:EN 14701-2:2006SIST EN 14701-2:2006en,fr,de13.030.20ICS:SLOVENSKI
STANDARDSIST EN 14701-2:200601-september-2006







EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14701-2June 2006ICS 13.030.20 English VersionCharacterization of sludges - Filtration properties - Part 2:Determination of the specific resistance to filtrationCaractérisation des boues - Propriétés en filtration - Partie2 : Détermination de la résistance specifique en filtrationCharakterisierung von Schlämmen -Filtrationseigenschaften - Teil 2: Bestimmung desspezifischen FiltrationswiderstandsThis 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 14701-2:2006: E



EN 14701-2:2006 (E) 2 Contents Page Foreword.3 Introduction.4 1 Scope.5 2 Normative references.5 3 Terms and definitions.5 4 Principle.5 5 Apparatus.5 6 Procedure.6 6.1 Reduced pressure (Figure A.1).6 6.2 Under pressure (Figure A.2).7 6.3 Under pressure with a piston (Figure A.3).7 7 Expression of results.8 8 Precision.8 9 Test report.8 Annex A (informative)
Filtration apparatus.10 Annex B (informative)
Table of viscosity.12 Annex C (informative)
Result of validation trials.13 Bibliography.18



EN 14701-2:2006 (E) 3 Foreword This document (EN 14701-2:2006) has been prepared by Technical Committee CEN/TC 308 “Characterization of sludges”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by December 2006, and conflicting national standards shall be withdrawn at the latest by December 2006. Other parts of this European Standard are:  Part 1: Capillary suction time (CST);  Part 3: Determination of the compressibility. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: 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.



EN 14701-2:2006 (E) 4 Introduction The specific resistance to filtration is a parameter, which indicates the suitability of sludge to be dewatered by means of a filtration process. The value of the specific resistance to filtration has great importance in the dewatering processes as it can be useful for estimating the performance of full-scale filtering devices, mainly pressure filters, and comparing dewaterability characteristics of sludges produced in different plants. Specific resistance measurements can also give indications on both the optimal type and dosage of conditioner to be used (prCEN/TR 14742).



EN 14701-2:2006 (E) 5 1 Scope This document specifies a method for determining the specific resistance to filtration of sludges, conditioned or non-conditioned. 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 origins. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 12880, Characterization of sludges — Determination of dry residue and water content EN 12832:1999, Characterization of sludges — Utilization and disposal of sludges — Vocabulary 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 12832:1999 and the following apply. 3.1 specific resistance to filtration property representing the resistance to filtration of a layer of particles, having a unit mass of dry solids deposited on a unit filtering area 4 Principle The principle of the method is based on the flow of a liquid through a porous medium according to Darcy's law, determined by pouring a reasonable volume of sludge into a filtering device and recording the amount of filtrate with time. 5 Apparatus Ordinary laboratory apparatus and the following: 5.1 Filtration apparatus able to contain a maximum sludge volume of 250 ml and filter diameter between 60 mm and 90 mm (see Annex A)



EN 14701-2:2006 (E) 6 5.1.1 Filtration apparatus for determining under reduced pressure (see Figure A.1) 5.1.2 Filtration apparatus for determining under pressure up to 1 MPa (see Figure A.2) 5.1.3 Filtration apparatus for determining under pressure up to 1 MPa with a piston (see Figure A.3) 5.2 Graduated cylinders with a capacity of 100 ml and 250 ml 5.3 Vacuum pump, or pressure air system 5.4 Chronometer 5.5 Conventional beakers with a capacity of 500 ml 5.6 Pipettes 5.7 Filter paper, extra fast, ashless, with a particle retention between 20 µm to 25 µm and a filtration speed of about 54 s/100 ml and a thickness of 0,22 mm (e.g. Whatman 411)) 5.8 Apparatus for determining sludge dry residue and water content (see EN 12880). 6 Procedure 6.1 Reduced pressure (Figure A.1) 6.1.1 Measure the dry residue of the sludge after filtration or centrifugation, Co in accordance with EN 12880 and assume that the dry residue measured in g/kg is equivalent to the concentration measured in g/l. 6.1.2 Keeping closed the valve of connection between filter (5.1) and vacuum system (5.3), put the system at an absolute pressure of (50 ± 5) kPa. The pressure shall be constantly maintained during the whole procedure. 6.1.3 Put the filter paper (5.7) in the funnel, make it wet with water and avoid any air entrance into the filter. 6.1.4 Measure the temperature, put (100 ± 1) ml of non-conditioned sludge or (200 ± 2) ml of conditioned, or of easily filterable sludge in the funnel. After gentle homogenisation by pouring off 3 to 4 times from one beaker to another, open the valve and start filtration. 6.1.5 Record filtrate volumes, V and corresponding times, t only after collecting a filtrate volume at least equal to 10 % of the initial one. Stop the filtration when one of the following conditions occurs:  pressure drops down (breaking of cake);  plot t/V versus V deviates from linearity;  filtration time is longer than 60 min.
1) This information is given for the convenience of users of this document and does not constitute an endorsement by CEN of the product named. Equivalent products may be used if they can be shown to lead to the same results.



EN 14701-2:2006 (E) 7 6.2 Under pressure (Figure A.2) 6.2.1 Measure the dry residue of the sludge after filtration or
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