1、ICS 13.060.30Klranlagen Teil 4: VorklrungEuropean Standard EN 12255-4 : 2002 has the status of a DIN Standard.A comma is used as the decimal marker.National forewordThis standard has been prepared by CEN/TC 165 Waste water engineering (Secretariat: Germany).The responsible German body involved in it
2、s preparation was the Normenausschuss Wasserwesen (WaterPractice Standards Committee), Technical Committee Abwasserbehandlungsanlagen.This European Standard is part of a series of standards dealing with wastewater treatment plants within thescope ot the EC Directive on the approximation of the laws,
3、 regulations and administrative provisions of theMember States relating to construction products.It should be noted that not all of the DIN Standards dealing with wastewater treatment plants need yet bewithdrawn. This is in keeping with resolution 152/98 taken by CEN/BT, which states that where pack
4、agesof EN Standards are concerned, it shall be permitted for the relevant national standards (DIN 19569 series)to remain valid for longer periods than usual, until the EN package has been published in its entirety.In the case at hand, all of the relevant EN Standards have not yet been published, and
5、 CEN/TC has thereforedecided to extend the period of validity for relevant national standards until the end of 2002.It should be noted that the scope of the EN 12255 series is not identical with that of the DIN 19569 series.Ref. No. DIN EN 12255-4 : 2002-04English price group 07 Sales No. 110708.02D
6、EUTSCHE NORMEN 12255-4EN comprises 8 pages. No part of this standard may be reproduced without the prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).Wastewater treatment plant
7、sPart 4: Primary settlementEnglish version of DIN EN 12255-4April 2002English versionICS 13.060.30Management Centre: rue de Stassart 36, B-1050 BrusselsEuropean Committee for StandardizationComit Europen de NormalisationEuropisches Komitee fr Normung 2002. CEN All rights of exploitation in any form
8、and by any meansreserved worldwide for CEN national members.Ref. No. EN 12255-4 : 2002 EStations dpuration Partie 4:Dcantation primaireKlranlagen Teil 4: VorklrungThis European Standard was approved by CEN on 2001-11-09.CEN members are bound to comply with the CEN/CENELEC Internal Regulationswhich s
9、tipulate the conditions for giving this European Standard the status of anational standard without any alteration.Up-to-date lists and bibliographical references concerning such national stand-ards may be obtained on application to the Management Centre or to any CENmember.The European Standards exi
10、st in three official versions (English, French, German).A version in any other language made by translation under the responsibility of aCEN member into its own language and notified to the Management Centre hasthe same status as the official versions.CEN members are the national standards bodies of
11、 Austria, Belgium, the CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,Luxembourg, Malta, the Netherlands, Norway, Portugal, Spain, Sweden, Switzer-land, and the United Kingdom.EN 12255-4January 2002Wastewater treatment plantsPart 4: Primary settlementPage 2EN 12255
12、-4 : 2002ContentsPageForeword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Normative references . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 Terms and definitions . . . . . . . . . . . . . . . . . . . . . . . . . .
14、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44.1 General . . . . . . . . . . . . . . . . . . .
15、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44.2 Planning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54.3 Process
16、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54.3.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17、. . . . . . . . . . . . . 54.3.2 Required capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54.3.3 Upward flow tanks (including Imhoff tanks) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18、 . . . . . . . . . . . . . . . 54.3.4 Horizontal flow tanks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64.3.5 Lamella separator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19、 . . . . . . . . . . . . . . . . . . . . . . . . . 64.3.6 Sludge collection and removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64.3.7 Scum removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74.4 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74.5 Health and safety . . . . . . . . . . . . . . . . . . . . . . .
21、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Bibliography . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Page 3EN 12255-4 : 2002Page 4EN 12255-4 : 2002Page 5EN 12255-4 : 2002Page 6EN 12255-4 : 2002Page 7EN 12255-4 : 2002Page 8EN 12255-4 : 2002
