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1、BRITISH STANDARD BS EN ISO 11733:1998 BS 6068-5.20: 1996 Incorporating Amendment No. 1 to BS 6068-5.20:1996 (renumbers the BS as BS EN ISO 11733: 1998) Water quality Evaluation of the elimination and biodegradability of organic compounds in an aqueous medium Activated sludge simulation test The Euro
2、pean Standard EN ISO 11733:1998 has the status of a British Standard ICS 07.100.20 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 01:48:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 11733:1998 This British Standard, having been prepared under the direction of the Health and Environ
3、ment Sector Board, was published under the authority of the Standards Board and comes into effect on 15 July 1996 BSI 05-1999 The following BSI references relate to the work on this standard: Committee reference EH/3/5 Draft for comment 93/509304 DC ISBN 0 580 25944 7 Committees responsible for this
4、 British Standard The preparation of this British Standard was entrusted by Technical Committee EH/3, Water quality, to Subcommittee EH/3/5, Biological methods, upon which the following bodies were represented: BLWA Ltd. (The Association of the Laboratory Supply Industry) Department of Economic Deve
5、lopment (Northern Ireland) Department of Health Department of the Environment (Her Majestys Inspectorate of Pollution) Department of the Environment (Water Directorate) Freshwater Biological Association Institution of Water and Environmental Management Ministry of Agriculture, Fisheries and Food Nat
6、ional Rivers Authority Royal Society of Chemistry Scottish Natural Heritage Soap and Detergent Industry Association Water Research Centre Amendments issued since publication Amd. No.DateComments 10320January 1999Indicated by a sideline in the margin Licensed Copy: sheffieldun sheffieldun, na, Sat No
7、v 18 01:48:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 11733:1998 BSI 05-1999i Contents Page Committees responsibleInside front cover National forewordii Foreword2 1Scope3 2Normative references3 3Definitions3 4Principle4 5Test environment4 6Reagents and materials4 7Apparatus5 8Procedure6
8、 9Calculation and expression of results8 10Validity of the test9 11Test report9 Annex A (informative) Test systems10 Annex B (informative) Example of an elimination curve13 Annex C (informative) Coupling of the test units13 Annex D (informative) Bibliography14 Annex ZA (normative) Normative referenc
9、es to international publications with their relevant European publications15 Figure A.1 Activated sludge plant model10 Figure A.2 Porous pot model11 Figure A.3 Example of dimensions of an aeration vessel and a separator of the activated sludge plant model12 List of referencesInside back cover Licens
10、ed Copy: sheffieldun sheffieldun, na, Sat Nov 18 01:48:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 11733:1998 ii BSI 05-1999 National foreword This British Standard is the English language version of EN ISO 11733:1998 and is identical with EN ISO 11733:1998 Water quality Evaluation of th
11、e elimination and biodegradability of organic compounds in an aqueous medium Activated sludge simulation test, published by the European Committee for Standardization and ISO 11733:1995 published by the International Organization for Standardization. It retains the dual identifier of BS 6068-5.20:19
12、96. The international standard was prepared by ISO Technical Committee 147, Water quality, with the active participation and approval of the UK. BS 6068 is being published in a series of Parts subdivided into Sections that will generally correspond to particular international standards. Sections are
13、 being, or will be, published in Parts 1 to 7, which, together with Part 0, are listed below: Part 0: Introduction; Part 1: Glossary; Part 2: Physical, chemical and biochemical methods; Part 3: Radiological methods; Part 4: Microbiological methods; Part 5: Biological methods; Part 6: Sampling; Part
14、7: Precision and accuracy. NOTEThe tests described in this Section of BS 6068 should only be carried out by suitably qualified persons with an appropriate level of biological expertise. Standard biological procedures should be followed throughout. Textual errors. When adopting the text of the intern
15、ational standard, the textual errors listed below were discovered. They have been marked in the text and have been reported to ISO in a proposal to amend the text of the international standard. In 6.3, line 2, “is” should be “are”. In 8.2.3, in the sixth item in note 5, line 2 “silicon” should be “s
16、ilicone”; in the last item, line 3 “to” should be “but”. In 8.2.4, in note 6, line 3 “COD or the test” should read “COD of the test”. In 9.2.2, line 4, “takes” should be “take”. Cross-references Publication referred toCorresponding British Standard ISO 6060:1989BS 6068 Water quality Part 2 Physical,
17、 chemical and biochemical methods Section 2.34:1988 Method for the determination of the chemical oxygen demand (Technically equivalent) ISO 8192:1986BS EN ISO 8192:1995 Water quality. Test for inhibition of oxygen consumption by activated sludge (Identical) ISO 9408:1991BS EN 29408:1993 Water qualit
18、y. Evaluation in an aqueous medium of the “ultimate” aerobic biodegradability of organic compounds: method by determining the oxygen demand in a closed respirometer (Identical) ISO 9439:1990BS EN 29439:1992 Water quality. Evaluation in an aqueous medium of the “ultimate” aerobic biodegradability of
19、organic compounds: method by analysis of released carbon dioxide (Identical) Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 01:48:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 11733:1998 BSI 05-1999iii The Technical Committee has reviewed the provisions of ISO 8245:1987, ISO 10304-
20、2:1995 and ISO 10634:1995 and of the drafts of ISO/DIS 11732 and ISO/DIS 11923, to which normative reference is made in the text and has decided that they are acceptable for use in conjunction with this standard. A British Standard does not purport to include all the necessary provisions of a contra
21、ct. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Publication referred toCorresponding British Standard ISO 9888:1991BS EN 29888:1993 Water quality. Evaluation of the aerobic bio
22、degradability of organic compounds in an aqueous medium. Static test (Zahn-Wellens method) (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i to iv, the EN ISO title page, pages 2 to 16, an inside back cover and a back cover. This standard has been upd
23、ated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 01:48:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na,
24、 Sat Nov 18 01:48:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 11733 July 1998 ICS 13.060.040 Descriptors: Water, quality, organic compounds, tests, water tests, biological tests, determination, biodegradability, aerobic bacteria English vers
25、ion Water quality Evaluation of the elimination and biodegradability of organic compounds in an aqueous medium Activated sludge simulation test (ISO 11733:1995) Qualit de leau Evaluation de llimination et de la biodgradabilit des composs organiques en milieu aqueux Essai de simulation des boues acti
26、ves (ISO 11733:1995) Wasserbeschaffenheit Untersuchung der Elimination und der biologischen Abbaubarkeit organischer Verbindungen in einem aquatischen Medium Belebtschlamm-Simulationstest (ISO 11733:1995) This European Standard was approved by CEN on 21 June 1998. CEN members are bound to comply wit
27、h the CEN/CENELEC Internal Regulations 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 Central Secretari
28、at or to any CEN member. This European 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 Central Secretariat has the same status as the official
29、versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit
30、Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members Ref. No. EN ISO 11733:1998 E Licensed Copy: sheffieldun sheffieldun, na, Sat N
31、ov 18 01:48:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 11733:1998 BSI 05-1999 2 Foreword The text of the International Standard from Technical Committee ISO/TC 147, Water quality, of the International Organization for Standardization (ISO) has been taken over as a European Standard by Tech
32、nical Committee CEN/TC 230, Water analysis, 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 January 1999, and conflicting national standards shall be withd
33、rawn at the latest by January 1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,
34、Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard ISO 11733:1995 has been approved by CEN as a European Standard without any modification. NOTENormative references to International Standards are lis
35、ted in Annex ZA (normative). Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 01:48:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 11733:1998 BSI 05-19993 WARNING SAFETY PRECAUTIONS Activated sludge and sewage may contain potentially pathogenic organisms. Therefore appropriate precaut
36、ions should be taken when handling them. Toxic test compounds and those whose properties are unknown should be handled with care. 1 Scope This International Standard specifies a method for the evaluation of the elimination and biodegradability of organic compounds at a given concentration by aerobic
37、 microorganisms. The conditions described simulate a waste-water treatment plant. The method applies to organic compounds that under the test conditions are a) water-soluble at the chosen test concentration; b) satisfactorily dispersable in water and allow dissolved organic carbon (DOC) measurements
38、; c) non-volatile, or have a negligible vapour pressure; d) not inhibitory to the microorganisms of the inoculum at the test concentration. Inhibition can be determined by using a suitable test method (e.g. ISO 8192). 2 Normative references The following standards contain provisions which, through r
39、eference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying
40、the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 6060:1989, Water quality Determination of the chemical oxygen demand. ISO 8192:1986, Water quality Test for inhibition of oxygen consumption by activat
41、ed sludge. ISO 8245:1987, Water quality Guidelines for the determination of total organic carbon (TOC). ISO 9408:1991, Water quality Evaluation in an aqueous medium of the “ultimate” aerobic biodegradability of organic compounds Method by determining the oxygen demand in a closed respirometer. ISO 9
42、439:1990, Water quality Evaluation in an aqueous medium of the “ultimate” aerobic biodegradability of organic compounds Method by analysis of released carbon dioxide. ISO 9888:1991, Water quality Evaluation of the aerobic biodegradability of organic compounds in an aqueous medium Static test (Zahn-W
43、ellens method). ISO 10304-2:1995, Water quality Determination of dissolved anions by liquid chromatography of ions Part 2: Determination of bromide, chloride, nitrate, nitrite, orthophosphate and sulfate in waste water. ISO 10634:1995, Water quality Guidance for the preparation and treatment of poor
44、ly water-soluble organic compounds for the subsequent evaluation of their biodegradability in an aqueous medium. ISO 11732:, Water quality Determination of ammonium nitrogen by flow analysis and spectrometric detection1). ISO 11923:, Water quality Determination of suspended solids by filtration thro
45、ugh glass-fibre filters1). 3 Definitions For the purposes of this International Standard, the following definitions apply. 3.1 ultimate biodegradation the level of degradation achieved when the test compound is totally utilized by microorganisms resulting in the production of carbon dioxide, water,
46、mineral salts and new microbial cellular constituents (biomass) 3.2 primary biodegradation the level of degradation achieved when the test compound undergoes any structural change, other than mineralization, as the result of microbial action 3.3 concentration of suspended solids the amount of solids
47、 obtained by filtration or centrifugation of a known volume of sludge under specified conditions and drying at 105 C to constant mass 1) To be published. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 01:48:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 11733:1998 4 BSI 05-1999 3.4
48、pre-exposure (or pre-adaptation) the preincubation of an inoculum in the presence of the test compound, with the aim of enhancing the ability of the inoculum to degrade the test compound. If the aim is achieved, the inoculum is said to be adapted 4 Principle This method is designed to determine the
49、elimination and, under some circumstances, the primary or ultimate biodegradation of water-soluble organic compounds by aerobic microorganisms in a continuously operated test system simulating the activated sludge process. An easily biodegradable organic medium and the organic test compound are the source of carbon and energy for the microorganisms. Two continuously operating test units (activated sludge plants or porous pots) are run in parallel under identical conditions, with a mean h