ISO INTERNATIONAL STANDARD 23139 First edition 2023-08 Biological equipment for treating air and other gases Requirements and application guidance for deodorization in wastewater treatment plants Equipements biologiques pour le traitement de I'air et autres zpb - Guide d'application pour la désodorisation dans les stations d'épuration des eaux usées Reference number ISO 23139:2023(E) ISO @ ISO 2023 IS0 23139:2023(E) COPYRIGHTPROTECTED DOCUMENT @IS02023 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on or ISoO's member body in the country of the requester. ISO copyright office CP 40i : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email:[email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2023- All rights reserved