CEN/TR 14742:2006

SLOVENSKI STANDARD
01-februar-2007
Karakterizacija blata - Postopek laboratorijskega kemijskega kondicioniranja
Characterization of sludges - Laboratory chemical conditioning procedure
Charakterisierung von Schlämmen - Laborverfahren zur chemischen Konditionierung
Caractérisation des boues - Mode opératoire de conditionnement chimique en
laboratoire
Ta slovenski standard je istoveten z: CEN/TR 14742:2006
ICS:
13.030.20 7HNRþLRGSDGNL%ODWR Liquid wastes. Sludge
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

TECHNICAL REPORT
CEN/TR 14742
RAPPORT TECHNIQUE
TECHNISCHER BERICHT
July 2006
ICS 13.030.20
English Version
Characterization of sludges - Laboratory chemical conditioning
procedure
Caractérisation des boues - Procédure de conditionnement Charakterisierung von Schlämmen - Laborverfahren zur
chimique en laboratoire chemischen Konditionierung
This Technical Report was approved by CEN on 28 February 2006. It has been drawn up by the Technical Committee CEN/TC 308.
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 STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TR 14742:2006: E
worldwide for CEN national Members.

Contents Page
Foreword.3
Introduction .4
1 Scope .5
2 Normative references .5
3 Terms and definitions .5
4 Principle.5
5 Apparatus .6
6 Procedure .6
7 Test report .7
Annex A (informative) Notes for dosage of coagulant aids .8
Annex B (informative) Example for mixing device for chemical conditioning procedure .9
Annex C (informative) Example of table summarising the operating conditions and the results of
the characterization tests .10
Bibliography .11

Foreword
This Technical Report (CEN/TR 14742:2006) has been prepared by Technical Committee CEN/TC 308
“Characterization of sludge”, the secretariat of which is held by AFNOR.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
Introduction
The laboratory assessment of sludge dewaterability is sensitive to the operating procedure adopted for the
conditioning step. No generalized ranking of products in order of effectiveness can be given since the ranking
changes with the sludge type, dosage of conditioning agent, degree of shearing and dewatering device.
This method gives a standardized procedure for the conditioning operation when selecting a conditioning
product at laboratory scale.
An informative annex is also given in order to have some view of the industrial conditioning with mineral
coagulants or with polyelectrolytes.
The test may give information about the energy needed for the procedure as far as determination of the
mixing power is available.
1 Scope
This Technical Report specifies a procedure for the chemical conditioning in laboratory of sludges.
This Technical Report 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 applicable to sludge and sludge suspensions of other origin.
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 12176, Characterisation of sludge — Determination of pH value
EN 12880, Characterisation of sludges — Determination of dry residue and water content
EN 12832:1999, Characterisation of sludges — Utilisation and disposal of sludges — Vocabulary (Trilingual
version)
EN 14701-1, Characterisation of sludges — Filtration properties — Part 1: Capillary suction time (CST)
EN 14701-2, Characterisation of sludges — Filtration properties — Part 2: Determination of the specific
resistance to filtration
3 Terms and definitions
For the purposes of this Technical Report, the terms
...