1、BRITISH STANDARDBS EN 14701-3:2006Characterization of sludges Filtration properties Part 3: Determination of the compressibilityThe European Standard EN 14701-3:2006 has the status of a British StandardICS 13.030.20g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g5
2、4g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Licensed Copy: Wang Bin, na, Tue Aug 21 01:03:35 GMT+00:00 2007, Uncontrolled Copy, (c) BSIBS EN 14701-3:2006This British Standard was published under the authority of the Standards Pol
3、icy and Strategy Committee on 30 April 2007 BSI 2007ISBN 978 0 580 50508 9National forewordThis British Standard was published by BSI. It is the UK implementation of EN 14701-3:2006.The UK participation in its preparation was entrusted to Technical Committee EH/5, Sludge characterization.A list of o
4、rganizations represented on EH/5 can be obtained on request to its secretary.The UK committee has never seen the need to standardize this method at a European level and, as a consequence, has not been actively involved in the development of this standard. However, the UK committee is pleased that a
5、classic British method was selected. The method has long been used as a valuable operational-control method and is available in existing technical literature (see reference 1 in the bibliography of this standard). Due to the difficulty and cost of sending liquid sludge samples (in such a manner that
6、 their properties do not change) to laboratories for international interlaboratory trials of the performance of this method, interested parties convened at a workshop to assess the test. Their conclusion was that the results are operationally defined (e.g. by the filter paper used) and, as the docum
7、ent does not specify all such operational details, the performance data are not really applicable outside the context of the workshop. As a result, the members of EH/5 have no information to offer on the reproducibility of the results.This publication does not purport to include all the necessary pr
8、ovisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsLicensed Copy: Wang Bin, na, Tue Aug 21 01:03:35 GMT+00:00 2007, Uncontrolled Copy, (c)
9、BSIEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 14701-3June 2006ICS 13.030.20English VersionCharacterization of sludges - Filtration properties - Part 3:Determination of the compressibilityCaractrisation des boues - Proprits de filtration - Partie3 : Dtermination de la compressibilitCharakteris
10、ierung von Schlmmen -Filtrationseigenschaften - Teil 3: Bestimmung derKompressibilittThis 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 nat
11、ional 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
12、 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,
13、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 STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR
14、NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14701-3:2006: ELicensed Copy: Wang Bin, na, Tue Aug 21 01:03:35 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEN 14701-3:2
15、006 (E) 2 Contents Page Foreword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .5 4 Principle5 5 Apparatus .5 6 Procedure .6 7 Expression of results 6 8 Precision.6 9 Test report 6 Bibliography7 Licensed Copy: Wang Bin, na, Tue Aug 21 01:03:35 GMT+00:00 2007, Uncontroll
16、ed Copy, (c) BSIEN 14701-3:2006 (E) 3 Foreword This document (EN 14701-3:2006) 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
17、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 2: Determination of the specific resistance to filtratio
18、n. 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,
19、 Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: Wang Bin, na, Tue Aug 21 01:03:35 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEN 14701-3:2006 (E) 4 Introduction The measurement of compressi
20、bility is complementary to that of specific resistance to filtration (see EN 14701-2). The scope of this determination is to evaluate the best range of pressure to be adopted for filtration. This parameter can be used together with other parameters to evaluate the performance of full-scale filtratio
21、n devices. Licensed Copy: Wang Bin, na, Tue Aug 21 01:03:35 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEN 14701-3:2006 (E) 5 1 Scope This document specifies a method to determine the compressibility of sludges, conditioned or not. This document is applicable to sludges and sludge suspensions from: st
22、orm 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.
23、 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 12832:1999, Characteri
24、zation of sludges Utilization and disposal of sludges Vocabulary EN 14701-2:2006, Characterization of sludges Filtration properties Part 2: Determination of the specific resistance to filtration 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 12832:19
25、99 and the following apply. 3.1 compressibility ability of a suspension to be compressed under pressure 3.2 compressibility coefficient slope of the straight line obtained by plotting a log-log scale the specific resistance to filtration versus pressure 4 Principle Measurement of the specific resist
26、ance to filtration of a sludge at different pressures. 5 Apparatus Filtration apparatus as described in 5.1.2, 5.1.3, 5.2 and 5.4. to 5.8 of EN 14701-2:2006. Licensed Copy: Wang Bin, na, Tue Aug 21 01:03:35 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEN 14701-3:2006 (E) 6 6 Procedure Measure the value
27、s of the specific resistance to filtration at least at three different pressures, following the procedure reported in the relevant method (see 6.2 or 6.3 of EN 14701-2:2006). The following values are suggested: 50 kPa, 150 kPa and 500 kPa. 7 Expression of results The coefficient of compressibility,
28、s is related to the applied pressure p by the equation (1): sporr = (1) where rois the specific resistance to filtration at pressure = 100 kPa; r is the specific resistance to filtration at pressure p; p is the pressure drop across the cake and cloth in Pascals (Pa); s is the coefficient of the comp
29、ressibility. Introducing logarithms, results: plogsorlogrlog += (2) Plotting on a log-log scale diagram r versus p, a straight line having a slope s is obtained. The value of s is calculated considering two points of the line r-p having respectively, co-ordinates (r1, p1) and (r2, p2) by equation (3
30、): )1p/2p/(log)1r/2r(logs = (3) NOTE Values of s higher than 1 indicate an increase of the specific resistance to filtration more than proportional to the pressure, thus it is not convenient to operate at high pressures (see clause 6). 8 Precision Precision is referred to that of the Determination o
31、f the specific resistance to filtration (EN 14701-2). 9 Test report The test report shall contain the following information: a) reference to this document; b) all information necessary for the complete identification of the sample; c) method with a reference to this document; d) test results obtaine
32、d; e) any detail not specified in this document or which is optional and any other factor which may have affected the results. Licensed Copy: Wang Bin, na, Tue Aug 21 01:03:35 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEN 14701-3:2006 (E) 7 Bibliography 1 Tiller, F.M., Theory and Practice of Solid-Li
33、quid Separation, University of Houston,A72, 544 pp., Houston Texas (1975). 2 91/271/EEC, COUNCIL DIRECTIVE of 21 May 1991 concerning urban waste water treatment. Licensed Copy: Wang Bin, na, Tue Aug 21 01:03:35 GMT+00:00 2007, Uncontrolled Copy, (c) BSIBS EN 14701-3:2006BSI389 Chiswick High RoadLond
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