DIN EN 14702-1-2006 Characterisation of sludges - Settling properties - Part 1 Determination of settleability (Determination of the proportion of sludge volume and sludge volume in.pdf

1、 DEUTSCHE NORMJune 2006DIN EN 14702-1 ICS 13.030.20 Supersedes DIN 38414-10:1981-09 and DIN 38414-10 Supplement 1:2005-05 Characterisation of sludges Settling properties Part 1: Determination of settleability (Determination of the proportion of sludge volume and sludge volume index) English version

2、of DIN EN 14702-1:2006-06 Charakterisierung von Schlmmen Absetzeigenschaften Teil 1: Bestimmung der Absetzbarkeit (Bestimmung des Schlammvolumens und des Schlammvolumenindexes) Englische Fassung DIN EN 14702-1:2006-06 Document comprises 15 pages No part of this standard may be reproduced without pri

3、or permission of DIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany, has the exclusive right of sale for German Standards (DIN-Normen). English price group 7 www.din.de www.beuth.de !,o-N“10.06 9761043DIN EN 14702-1:2006-06 2 This standard is part of the series

4、 Deutsche Einheitsverfahren zur Wasser-, Abwasser- und Schlammunter-suchung Schlamm und Sedimente (Gruppe S) (German standard methods for the examination of water, waste water and sludge Sludge and sediments (group S). National foreword This standard has been prepared by CEN/TC 308 Characterisation

5、of sludges (Secretariat: France), Working Group WG 1 Characterisation methods. The responsible German body involved in its preparation was the Normenausschuss Wasserwesen (Water Practice Standards Committee), Technical Committees NA 119-01-02-03 UA Physikalische Verfahren and NA 119-01-03-04 Schlamm

6、 und Sedimente. The national standards bodies are bound to adopt this European Standard in its entirety and without any modifications. Since this standard supersedes DIN 38414-10:1981-09 (withdrawn), it shall also apply to sludge volume and sludge volume index determination. Expert assistance and sp

7、ecialized laboratories will be required to perform the analysis described in this stan-dard. Depending on the objective of the analysis, a check shall be made on a case-by-case basis as to whether and to what extent additional conditions will have to be specified. Standard methods published as DIN S

8、tandards are obtainable from Beuth Verlag GmbH, either individually or grouped in volumes. The standard methods included in the loose-leaf publication entitled Deutsche Einheits-verfahren zur Wasser-, Abwasser- und Schlammuntersuchung will continue to be published by Wiley-VCH Verlag and Beuth Verla

9、g GmbH. All standard methods relevant to the Abwasserverordnung (Waste Water Regulation) (AbwV) included in the new Regulation on Section 7a of the Gesetz zur Ordnung des Wasserhaushalts (German Water Management Act together with the Abwasserverordnung and the Gesetz zur Ordnung des Wasserhaushalts

10、and other valid administrative regulations on waste water have been published as a loose-leaf collection “Analysen-verfahren in der Abwasserverordnung Rechtsvorschriften und Normen” *), with Supplement 1 (DIN Stan-dards), Supplement 2 (DIN EN and DIN EN ISO Standards) and 3 (DIN, DIN EN and DIN EN I

11、SO Standards). Standard methods or draft standards bearing the group title German standard methods for the examination of water, waste water and sludge are classified under the following categories (main titles): General information (group A) (DIN 38402) Sensory analysis (group B) (DIN 38403) Physic

12、al and physicochemical parameters (group C) (DIN 38404) Anions (group D) (DIN 38405) Cations (group E) (DIN 38406) Substance group analysis (group F) (DIN 38407) Gaseous constituents (group G) (DIN 38408) Parameters characterizing effects and substances (group H) (DIN 38409) Biological-ecological me

13、thods of analysis (group M) (DIN 38410) *)Available in German. DIN EN 14702-1:2006-06 3 Microbiological methods (group K) (DIN 38411) Test methods using water organisms (group L) (DIN 38412) Individual constituents (group P) (DIN 38413) Sludge and sediments (group S) (DIN 38414) Bio-assays with micr

14、oorganisms (group T) (DIN 38415) In addition to the methods described in the DIN 38402 to DIN 38415 series of standards, there are a number of European and International Standards available as DIN EN, DIN EN ISO and DIN ISO Standards, which also form part of the collection of German standard methods

15、. Information on Parts of these series of standards that have already been published can be obtained from the offices of the Normenausschuss Wasserwesen, telephone (030) 2601-2747, or from Beuth Verlag GmbH, Burggrafenstrae 6, 10787 Berlin, Germany. The DIN Standard corresponding to the Internationa

16、l Standard referred to in this document is as follows: ISO 5725-2 DIN ISO 5725-2 Amendments This standard differs from DIN 38414-10:1981-09 and DIN 38414-10 Supplement 1:2005-05 as follows: a) The text has been revised to reflect European standardization. Previous editions DIN 38414-10: 1981-09 DIN

17、38414-10 Supplement 1: 2005-05 National Annex NA (informative) Bibliography DIN ISO 5725-2, Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method EUROPEAN STANDARDNORME EUR

18、OPENNEEUROPISCHE NORMEN 14702-1March 2006ICS 13.030.20English VersionCharacterisation of sludges - Settling properties - Part 1:Determination of settleability (Determination of the proportion ofsludge volume and sludge volume index)Caractrisation des boues - Proprits de sdimentation -Partie 1: Dterm

19、ination de laptitude la sdimentation(Dtermination du volume de boues et de lindice de boues)Charakterisierung von Schlmmen - Absetzeigenschaften -Teil 1: Bestimmung der Absetzbarkeit (Bestimmung desSchlammvolumens und des Schlammvolumenindexes)This European Standard was approved by CEN on 3 February

20、 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

21、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

22、 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, Ro

23、mania,Slovakia, Slovenia, Spain, Sweden, Switzerland 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 reservedwo

24、rldwide for CEN national Members.Ref. No. EN 14702-1:2006: EEN 14702-1:2006 (E) 2 Contents Page Foreword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .5 4 Principle5 5 Interferences 6 6 Apparatus .6 7 Procedure .6 7.1 General6 7.2 Determination of solids concentration6

25、 8 Expression of results 6 9 Precision.7 10 Test report 7 Annex A (informative) Results of validation trials .8 Bibliography 12 EN 14702-1:2006 (E) 3 Foreword This document (EN 14702-1:2006) has been prepared by Technical Committee CEN/TC 308 “Characterisation of sludges”, the secretariat of which i

26、s 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 September 2006, and conflicting national standards shall be withdrawn at the latest by September 2006. Another part of this Europea

27、n Standard is: Part 2: Determination of thickenability. 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, Germa

28、ny, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 14702-1:2006 (E) 4 Introduction Determination of the settleability via the determination of the pr

29、oportion of sludge volume is an operational parameter and enables an assessment to be made (admittedly only within limits) of the dry matter content of a mixture of sludge and water. The value is used for calculating the rate of sludge settling and calculating the sludge volume index and to evaluate

30、 the performance of settling tanks. EN 14702-1:2006 (E) 5 1 Scope This document specifies a method for the determination of the settleability of sludge suspensions. This document is applicable to sludge suspensions from: storm water handling; urban wastewater collecting systems; urban wastewater tre

31、atment 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 suspensions from other origin. 2 Normative references The following referenced documents are indispensable for the a

32、pplication 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 872, Water quality Determination of suspended solids Method by filtration through glass fibre filters EN 128

33、80, Characterization of sludges Determination of dry residue and water content EN 1085:1997, Waste water treatment Vocabulary 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 1085:1997 and the following apply. 3.1 settleability ability of sludge solids

34、 to separate from water by sedimentation under gravity 3.2 settled sludge volume volume of the sludge solids suspension after settling under specified conditions 7360, EN 1085:1997 3.3 sludge volume index sludge volume divided by the concentration of dry matter by mass in the sludge 7370, EN 1085:19

35、97 4 Principle The settled sludge volume and the sludge volume index are determined by a 30 min settling of a sludge suspension. EN 14702-1:2006 (E) 6 5 Interferences In order to avoid modifying the settling process, the sludge/water mixture must not be too strongly shaken. The settling process can

36、be disturbed by the walls of the vessel and the mutual interference between individual flocs, particularly when the proportion of sludge volume is high (greater than 250 ml/l). In such cases a new sample is prepared by dilution as described under 7.2. If the dissolved solids content is low and can b

37、e neglected in comparison to dry matter content, the total solids content should be determined and used for calculations. Interference also occurs when there are fairly large temperature differences between the temperature of the sample and the ambient temperature as a result of convection and forma

38、tion of gas bubbles. With differences of more than 5 C it is advisable to place the settling cylinder with the sample in a bucket filled with the sample fluid. 6 Apparatus 6.1 graduated cylinder, nominal volume 1 000 ml, made of glass or transparent plastic, diameter 60 mm to 70 mm NOTE In cases whe

39、re the sludge volume after 30 min is less than 50 ml, an Imhoff cone of a volume of 1 l may be used. 6.2 scoop, nominal volume 1 l 7 Procedure 7.1 General A representative sample of a sludge suspension is taken by a scoop and immediately poured into the graduated cylinder up to the 1 000 ml mark. Fo

40、r this purpose, a scoop holding 1 l up to the edge should be used; this avoids possible settling in the scoop. Once the sample has stood for 30 min in one place without shaking, the sludge volume is read off at the surface level of the sludge (sludge-water interface). The determination shall be repe

41、ated if the sludge volume is greater than 250 ml/l. For this purpose, the new sample shall be first of all diluted with water taken from the standing water of a sludge suspension or from water run off from a settling basin, in a volume ratio 1:1, 1:2 or 1:3. The value then read off for the sludge vo

42、lume is multiplied by the dilution factor 2, 3 or 4 for the evaluation. Gently homogenize the diluted sample by turning the closed cylinder two times overhead. In reporting the result, the dilution used is that at which the value goes below 250 ml/l for the first time. Determination shall be perform

43、ed in duplicates. 7.2 Determination of solids concentration 7.2.1 If the total dissolved solids concentration is less than 10 % of total solids, the concentration by mass of dry matter in sludge (g/l) has to be determined following EN 12880. 7.2.2 If the total dissolved solids concentration is highe

44、r than 10 % of total solids, the concentration by mass of dry matter in sludge (g/l) has to be determined following EN 872. 8 Expression of results The settled sludge volume VSin ml/l is obtained as the sludge volume after settling divided by the volume of the initial sludge sample used. EN 14702-1:

45、2006 (E) 7 The sludge volume index is calculated from the equation: TSsvVI = where Isvis the sludge volume index in millilitres per gram (ml/g); NOTE 1 In technical literature this parameter is often named SVI. VSis the sludge volume in millilitres per litre (ml/l) after 30 min settling, taken as an

46、 average of at least two measurements; Tis the concentration of solids in sludge, in grams per litre (g/l) (see Clause 7). NOTE 2 Values rounded to the nearest 10 ml/l are given for the proportion of sludge volume. If the sample has to be diluted, the sludge volume shall be read off in the diluted s

47、ample and the dilution factor shall be given in brackets after the reported value. EXAMPLE 1 Original sample: Proportion of the settled sludge volume 180 ml/l EXAMPLE 2 Diluted sample: Proportion of the settled sludge volume 510 ml/l (170 ml after 3 times dilution) Values rounded to the nearest 1 ml

48、/g are reported for the sludge volume index. EXAMPLE 3 Sludge volume index 145 ml/g 9 Precision Results of validation trials are summarized in Annex A (informative). The repeatability standard deviation ranges from 0,066 ml/g (0,2 %) for digested sewage sludge, to 0,287 ml/g (1,2 %) for waterworks s

49、ludge, and to 4,370 ml/g (3,0 %) for activated sewage sludge. Mean value is 1,574 ml/g (2,2 %). Minimum precision is 3,0 %. The reproducibility standard deviation ranges from 0,131 ml/g (0,3 %) for digested sewage sludge, to 0,521 ml/g (2,2 %) for waterworks sludge, and to 7,304 ml/g (5,1 %) for activated sewage sludge. Mean value is 2,652 ml/g (3,8 %). Minimum precision is 5,1 %. 10 Test report The test report shall contain the following information: a) reference to this document; b) all information necessary for t