BS-EN-12255-15-2003.pdf
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1、BRITISH STANDARD BS EN 12255-15:2003 Wastewater treatment plants Part 15: Measurement of the oxygen transfer in clean water in aeration tanks of activated sludge plants The European Standard EN 12255-15:2003 has the status of a British Standard ICS 13.060.30 ? Licensed Copy: sheffieldun sheffieldun,
2、 na, Sat Oct 28 05:45:28 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 12255-15:2003 This British Standard, was published under the authority of the Standards Policy and Strategy Committee on 17 December 2003 BSI 17 December 2003 ISBN 0 580 43094 4 National foreword This British Standard is the o
3、fficial English language version of EN 12255-15:2003. The UK participation in its preparation was entrusted to Technical Committee B/505, Waste water engineering, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross
4、-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of B
5、ritish Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; pre
6、sent to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an
7、 inside front cover, the EN title page, pages 2 to 16, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sat Oct
8、 28 05:45:28 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12255-15 December 2003 ICS 13.060.30 English version Wastewater treatment plants - Part 15: Measurement of the oxygen transfer in clean water in aeration tanks of activated sludge plants Stat
9、ions dpuration - Partie 15: Mesure de performances des arateurs Klranlagen - Teil 15: Messung der Sauerstoffzufuhr in Reinwasser in Belftungsbecken von Belebungsanlagen This European Standard was approved by CEN on 3 November 2003. CEN members are bound to comply with the CEN/CENELEC Internal Regula
10、tions which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member. This Europ
11、ean Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions. CEN members are the nationa
12、l standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORM
13、ALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2003 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12255-15:2003 E Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 05:45:28 GMT
14、+00:00 2006, Uncontrolled Copy, (c) BSI EN 12255-15:2003 (E) 2 Contents page Foreword. 3 1Scope . 4 2Normative references . 4 3Terms and definitions. 4 4Symbols and abbreviations. 5 5Principle and procedures. 6 6Aeration tanks, test-water, equipment and chemicals 7 6.1Aeration tanks and aeration ins
15、tallations 7 6.2Measuring Equipment 7 6.2.1Dissolved oxygen probes (DO probes) 7 6.2.2Recording of the dissolved oxygen concentration. 8 6.2.3Temperature measurement 8 6.3Chemicals 8 6.3.1Sodium sulphite 8 6.3.2Cobalt catalyst. 8 6.3.3Nitrogen and pure oxygen gas 8 6.4Test-water 8 7Procedure 9 7.1Pl
16、anning of testing 9 7.2Advance preparation and responsibilities. 9 7.3Filling of the tank with test-water 10 7.4Installation of the DO probes. 10 7.5Addition of chemicals. 11 7.5.1Cobalt catalyst. 11 7.5.2Sodium sulphite 11 7.6Gas injection 12 7.7Data collection during a test 12 7.8Data analysis. 13
17、 8Precision and accuracy of results. 13 8.1Standard oxygen transfer rate. 13 8.2Standard aeration efficiency 13 8.3Specific standard oxygen transfer efficiency 14 9Presentation and interpretation of the results. 14 Annex A (normative) Alternative test and evaluation procedure. 15 A.1Principle. 15 A.
18、2Measurement of the oxygen saturation value 15 A.3In-situ calibration of the DO probes 15 A.4Determination of the oxygen transfer coefficient 15 Bibliography. 16 Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 05:45:28 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12255-15:2003 (E) 3 Foreword
19、 This document (EN 12255-15:2003) has been prepared by Technical Committee CEN/TC 165 “Waste water engineering”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the late
20、st by June 2004, and conflicting national standards shall be withdrawn at the latest by June 2004. It is the fifteenth Part prepared by the Working Groups CEN/TC 165/WG 42 and 43 relating to the general requirements and processes for treatment plants for a total number of inhabitants and population
21、equivalents (PT) over 50. EN 12255 with the generic title “Wastewater treatment plants“ consists of the following Parts: Part 1: General construction principles Part 3: Preliminary treatment Part 4: Primary settlement Part 5: Lagooning processes Part 6: Activated sludge process Part 7: Biological fi
22、xed-film reactors Part 8: Sludge treatment and storage Part 9: Odour control and ventilation Part 10: Safety principles Part 11: General data required Part 12: Control and automation Part 13: Chemical treatment Treatment of wastewater by precipitation/flocculation Part 14: Disinfection Part 15: Meas
23、urement of the oxygen transfer in clean water in aeration tanks of activated sludge plants Part 16: Physical (mechanical) filtration NOTEFor requirements on pumping installations at wastewater treatment plants, provided initially as Part 2: Pumping installations for wastewater treatment plants, see
24、EN 752-6 Drain and sewer systems outside buildings Part 6: Pumping installations. The parts EN 12255-1, EN 12255-3 to EN 12255-8 and EN 12255-10 and EN 12255-11 were implemented together as a European package (Resolution BT 152/1998). Annex A is normative. According to the CEN/CENELEC Internal Regul
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