BS-EN-12255-13-2002.pdf
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1、BRITISH STANDARD BS EN 12255-13:2002 Wastewater treatment plants Part 13: Chemical treatment Treatment of wastewater by precipitation/flocculation The European Standard EN 12255-13:2002 has the status of a British Standard ICS 13.060.30 ? Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 05:45:
2、33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 12255-13:2002 This British Standard, was published under the authority of the Standards Policy and Strategy Committee on 24 July 2003 BSI 24 July 2003 ISBN 0 580 42318 2 National foreword This British Standard is the official English language versi
3、on of EN 12255-13:2002. 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-references The British Standa
4、rds 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 British Standards Online. This
5、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; present to the responsible intern
6、ational/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 inside front cover, the EN ti
7、tle page, pages 2 to 14, 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 28 05:45:33 GMT+00:00 2006, U
8、ncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12255-13 December 2002 ICS 13.060.30 English version Wastewater treatment plants - Part 13: Chemical treatment - Treatment of wastewater by precipitation/flocculation Stations dpuration - Partie 13: Traitement chimique -
9、Traitement des eaux uses par prcipitation/flocculation Klranlagen - Teil 13: Chemische Behandlung - Abwasserbehandlung durch Fllung/Flockung This European Standard was approved by CEN on 1 November 2002. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the co
10、nditions 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 European Standard exists in three
11、 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 national standards bodies of Austri
12、a, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Manage
13、ment Centre: rue de Stassart, 36 B-1050 Brussels 2002 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12255-13:2002 E Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 05:45:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 1225
14、5-13:2002 (E) 2 Contents page Foreword3 1Scope 4 2Normative references 4 3Terms and definitions4 4Requirements.5 4.1General5 4.2Chemical background and process options.5 4.2.1Chemical process 5 4.2.2Precipitation processes 6 4.2.3Selection of precipitation chemicals .7 4.3Storage of chemicals.7 4.3.
15、1General7 4.3.2Aluminum salts 8 4.3.3Iron salts.8 4.3.4Calcium salts8 4.4Dosing equipment8 4.4.1General8 4.4.2Aluminium salts .9 4.4.3Iron salts.9 4.4.4Calcium salts9 4.5Silos and tanks.10 4.6Mixing systems 10 4.7Flocculators10 4.8Sedimentation tanks10 4.8.1General10 4.8.2Design considerations 10 4.
16、8.3Chemical sludge wasting10 4.9Flotation10 4.10Physical filtration.11 4.11Sludge.11 4.11.1Sludge production .11 4.11.2Sludge characteristics.11 Annex A (normative) Precipitation chemicals12 A.1Aluminium salts .12 A.2Iron salts.12 A.2.1Ferrous salts.12 A.2.2Ferrous sulphate, monohydrate.12 A.2.3Ferr
17、ous sulphate, heptahydrate.12 A.2.4Ferric salts12 A.3Calcium salts13 A.3.1General13 A.3.2Calcium oxide.13 A.3.3Calcium hydroxide.13 Bibliography14 Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 05:45:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12255-13:2002 (E) 3 Foreword This document
18、(EN 12255-13:2002) 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 latest by June 200
19、3, and conflicting national standards shall be withdrawn at the latest by June 2003. It is the thirteenth part prepared by the Working Groups CEN/TC 165/WG 42 and 43 relating to the general requirements and processes for wastewater treatment plants for a total number of inhabitants and population eq
20、uivalents (PT) over 50. The parts of the series are as follows: 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 fixed-film reactors Part 8: Sludge treatment and storage Pa
21、rt 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: Measurement of the oxygen transfer in clean water in activa
22、ted sludge aeration tanks Part 16: Physical (mechanical) filtration 1) NOTEFor requirements on pumping installations at wastewater treatment plants, provided initially as part 2 “Pumping installations for wastewater treatment plants“, see EN 752-6 “Drain and sewer systems outside buildings Part 6: P
23、umping 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). WARNING The use of this European Standard may involve hazardous materials, operations and equipment. This European Standard d
24、oes not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this European Standard to establish appropriate safety and health practices and determine the applicability of regularity limitations prior to use (see also EN 12255-10). Annex A is
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