BS-EN-ISO-9509-1995 BS-6068-5.9-1990 ISO-9509-1989.pdf
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1、BRITISH STANDARD BS 6068-5.9: 1990 ISO 9509:1989 Water quality Part 5: Biological methods Section 5.9 Method for assessing the inhibition of nitrification of activated sludge micro-organisms by chemicals and waste waters Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 01:41:00 GMT+00:00 2006,
2、 Uncontrolled Copy, (c) BSI BS 6068-5.9:1990 This British Standard, having been prepared under the direction of the Environment and Pollution Standards Policy Committee, was published under the authority of the Board of BSI and comes into effect on 30 September 1990 BSI 03-2000 The following BSI ref
3、erences relate to the work on this standard: Committee reference EPC/44 Draft for comment 88/52165 DC ISBN 0 580 18424 2 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Environment and Pollution Standards Policy Committee (EPC/-) to Tech
4、nical Committee EPC/44, upon which the following bodies were represented: Association of Consulting Scientists British Association for Chemical Specialities British Gas plc Chemical Industries Association Department of the Environment (Water Directorate) Department of the Environment for Northern Ir
5、eland Department of Trade and Industry (Laboratory of the Government Chemist) Electricity Supply Industry in England and Wales Industrial Water Society Institute of Petroleum Institution of Gas Engineers Institution of Water and Environmental Management National Rivers Authority Royal Institute of P
6、ublic Health and Hygiene Royal Society of Chemistry Scottish Association of Directors of Water and Sewerage Services Soap and Detergent Industry Association Water Companies Association Water Research Centre Water Services Association of England and Wales Amendments issued since publication Amd. No.D
7、ateComments Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 01:41:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6068-5.9:1990 BSI 03-2000i Contents Page Committees responsibleInside front cover National forewordii 1Scope1 2Normative references1 3Definitions1 4Principle1 5Reagents and mater
8、ials2 6Apparatus2 7Procedure2 8Calculation and expression of results2 9Validity of results3 10Test report3 Annex A (normative) Determination of the nitrifying activity of an activated sludge4 Annex B (normative) Example for preparation of the test4 Annex C (informative) Bibliography5 Table B.14 Publ
9、ication(s) referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 01:41:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6068-5.9:1990 ii BSI 03-2000 National foreword This Section of BS 6068, which has been prepared under the direction of the Environment and Pollution S
10、tandards Policy Committee, is identical with ISO 9509:1989 “Water quality Method for assessing the inhibition of nitrification of activated sludge micro-organisms by chemicals and waste waters”. The International Standard was prepared by subcommittee 5, Biological methods, of Technical Committee 147
11、, Water quality, of the International Organization for Standardization (ISO) with the active approval and participation of the UK. This British Standard is being published in a series of Parts subdivided into Sections that will generally correspond to particular International Standards. Sections are
12、 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 7
13、: Precision and accuracy. NOTEThe tests described in this Section of BS 6068 should only be carried out in laboratories with suitable facilities and by suitably qualified persons with an appropriate level of expertise. Reference to ISO 6107-3:1985, for which there is no corresponding British Standar
14、d, is made only at the end of the definition in 3.3, where the definition given is identical to that presented in ISO 6107-3. Additional information. In 6.7 the phrase “does not release nitrogen” refers to oxidized nitrogen and ammoniacal nitrogen not being released. An alternative source for the in
15、formation given in Annex C, reference 4, is Official Journal of the European Communities, L133, 31, 106-117, 30th May 1988. Typographical errors. In 1.3, line 3, reference should be to 7.1, not 8.1. In 7.1, line 1, “nitration” should be read as “nitrification”. A British Standard does not purport to
16、 include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references International StandardCorresponding British Standard ISO 6107-
17、1:1986BS 6068 Water quality Section 1.1:1987 Terms relating to types of water, and treatment and storage of waste water (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 6, an inside back cover and a back cover. This standard has be
18、en updated (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 01:41:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6068-5.9:1990 BSI 03-20001 WARNING Activate
19、d sludges may contain pathogenic organisms, therefore take appropriate precautions when handling them. Handle toxic test substances and those with unknown properties with care. 1 Scope 1.1 This International Standard specifies a method for assessing the short-term inhibitory effects of test substanc
20、es on nitrifying bacteria in activated sludge. The inhibitory effect is estimated over an exposure period of 4 h. 1.2 The method is suitable for use with nitrifying activated sludge derived from domestic sewage. It is also possible to use nitrifying sludges derived from synthetic sewage. 1.3 Initial
21、ly, the nitrifying activity of the activated sludge is verified by addition of a specific inhibitor (e.g. allylthiourea). If the nitrification rate (see 8.1) is within a suitable range for the test 2 to 6,5 milligrams of nitrogen per gram suspended solids per hour (2 mg of N/(gh) to 6,5 mg of N/(gh)
22、, the sludge is used directly; if not, adjustments are necessary (see clause 9). 1.4 The method is applicable to non-volatile chemical substances which are soluble in water and also to waste waters. It is possible to use insoluble substances, if care is taken to ensure as much homogeneity as possibl
23、e. 1.5 It is important to stress that sludges from different sources respond differently to a given concentration of an inhibitor and this is probably due, at least in part, to reaction between the inhibitor and components of the sludge resulting in a partial nullifying of the toxic effect. Also, si
24、nce the test lasts only 4 h, it must be borne in mind that any inhibitory effects may diminish, or increase, over a longer period, e.g. in the continuous activated sludge system. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provi
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