ISO INTERNATIONAL STANDARD 13641-1 First edition 2003-05-15 Water quality Determination of inhibition of gas production of anaerobic bacteria - Part 1: General test Qualite de I'eau - Détermination de I'inhibition de la production de gaz des bacteries anaérobies - Partie 1: Essai général Reference number ISO 13641-1:2003(E) ISO @ISO2003 py IHS under itted without license from IHS Not for Resale ISO 13641-1:2003(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below ?ISO2003 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, IsO's member body in the country of the requester. ISO copyright office Case postale 56 . CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland ationalgazaiSandardizato @Iso2003-All rightsreserved ermittedwithoutlicense from IHS Not for Resale ISO 13641-1:2003(E) Contents Page Foreword 1 Scope 2 Normative references 3 Principle. 4 Reagents and media. 5 Apparatus..... 6 Test environment and interferences 7 Procedure... 8 Calculation 9 Validity criteria 10 Test report.. Annex A (informative) Calibration of the pressure meter... Annex B (informative) Testing of liquid samples and sludges . Annex C (informative) Expression of results in tests with wastewater. Bibliography Copyright International Organizaion for Standardization rights reserved ili se from IHS Not for Resale ISO 13641-1:2003(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies technicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeer non-governmental, in liaison with isO, also take part in the work. iso collaborates closely with the InternationalElectrotechnicalCommission(lEC)onallmattersofelectrotechnicalstandardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO 13641-1 was prepared by Technical Committee ISO/TC 147, Water quality, Subcommittee SC 5, Biological methods. ISO 13641 consists of the following parts, under the general title Water quality Determination of inhibition of gas production of anaerobic bacteria: Part 1: General test Part2:Testforlowbiomassconcentrations Iso 2003-All rights reserved onal Organization for Standardizatior INTERNATIONALSTANDARD ISO 13641-1:2003(E) Water quality Determination of inhibition of gas production of anaerobic bacteria : Part 1: General test WARNING - Sludge samples may contain hazardous and inflammable substances. They contain pathogens and areliable tobiological action.Consequently,it is recommended that samplesbe handledwithspecial care.Thegasesthatmaybeproducedbymicrobiologicalactivi