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、4g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 14701-3:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 April 2007 BSI 2007ISBN 978 0 580 50508 9National foreword
3、This 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 organizations represented on EH/5 can be obtained on request to its secretary.The UK committ
4、ee 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 classic British method was selected. The method has long been used as a valuable operationa
5、l-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 their properties do not change) to laboratories for international interlaboratory trials o
6、f 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 document does not specify all such operational details, the performance data are not really appl
7、icable 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 provisions of a contract. Users are responsible for its correct application.Compliance with a
8、 British Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 14701-3June 2006ICS 13.030.20English VersionCharacterization of sludges - Filtration properties - Part 3:Determination of the com
9、pressibilityCaractrisation des boues - Proprits de filtration - Partie3 : Dtermination de la compressibilitCharakterisierung von Schlmmen -Filtrationseigenschaften - Teil 3: Bestimmung derKompressibilittThis European Standard was approved by CEN on 24 May 2006.CEN members are bound to comply with th
10、e 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
11、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.
12、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, Swit
13、zerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR 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
14、14701-3:2006: EEN 14701-3:2006 (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 EN 14701-3:2006 (E) 3 Foreword This document (EN
15、 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 of an identical text or by endorsement, at the latest by Decembe
16、r 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 filtration. According to the CEN/CENELEC Internal Regulations, the nation
17、al 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, Port
18、ugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 14701-3:2006 (E) 4 Introduction The measurement of compressibility 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 pre
19、ssure to be adopted for filtration. This parameter can be used together with other parameters to evaluate the performance of full-scale filtration devices. EN 14701-3:2006 (E) 5 1 Scope This document specifies a method to determine the compressibility of sludges, conditioned or not. This document is
20、 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 applic
21、able 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 (includ
22、ing any amendments) applies. EN 12832:1999, Characterization 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 do
23、cument, the terms and definitions given in EN 12832:1999 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 p
24、ressure 4 Principle Measurement of the specific resistance 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. EN 14701-3:2006 (E) 6 6 Procedure Measure the values of the specific resistance to filtr
25、ation 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, s is related to the applied pressure
26、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 compressibility. Introducing logarithms,
27、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): )1p/2p/(log)1r/2r(logs = (3) NOTE
28、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 of the specific resistance to filtrati
29、on (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 obtained; e) any detail not specified in thi
30、s document or which is optional and any other factor which may have affected the results. EN 14701-3:2006 (E) 7 Bibliography 1 Tiller, F.M., Theory and Practice of Solid-Liquid Separation, University of Houston,A72, 544 pp., Houston Texas (1975). 2 91/271/EEC, COUNCIL DIRECTIVE of 21 May 1991 concer
31、ning urban waste water treatment. BS EN 14701-3:2006BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards InstitutionBSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporate
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