EN 17925:2024

SLOVENSKI STANDARD
01-junij-2024
Izboljševalci tal in rastni substrati - Določanje temperaturno-časovnega profila
med kompostiranjem in razkrojem odpadkov
Soil improvers and growing media - Determination of temperature-time profiles during
composting and digestion
Bodenverbesserungsmittel und Kultursubstrate - Bestimmung der Temperatur-Zeit-
Profile während der Kompostierung und Vergärung
Amendements du sol et supports de culture - Détermination des profils température-
temps pendant le compostage et la digestion
Ta slovenski standard je istoveten z: EN 17925:2024
ICS:
65.080 Gnojila Fertilizers
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 17925
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2024
EUROPÄISCHE NORM
ICS 65.080
English Version
Soil improvers and growing media - Determination of
temperature-time profiles during composting and
digestion
Amendements du sol et supports de culture - Bodenverbesserungsmittel und Kultursubstrate -
Détermination des profils température-temps pendant Bestimmung der Temperatur-Zeit-Profile während der
le compostage et la digestion Kompostierung und Vergärung
This European Standard was approved by CEN on 8 January 2024.

CEN members are bound to comply with 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 CEN-CENELEC Management Centre 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 CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 17925:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Requirements . 6
4.1 General. 6
4.2 Requirements for measurements in composting plants . 6
4.3 Process requirements in anaerobic digestion plants . 7
5 Apparatus . 7
6 Procedure . 7
6.1 General. 7
6.2 Measurement of the temperature directly in the composting material . 8
6.3 Measurement of the temperature indirectly in the exhaust air of composting systems
..................................................................................................................................................................... 8
6.4 Measurement of the temperature in anaerobic digestion plants. 8
6.5 Documentation of temperature . 8

European foreword
This document (EN 17925:2024) has been prepared by Technical Committee CEN/TC 223 “Soil
improvers and growing media”, the secretariat of which is held by NEN.
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 September 2024, and conflicting national standards shall
be withdrawn at the latest by September 2024.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,
Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United
Kingdom.
Introduction
This document is applicable for the measurement of temperature during the composting and anaerobic
digestion process.
In composting plants, a high biological activity with corresponding self-heating of the biodegradable
material is achieved by a suitable process control under favourable oxygen and humidity conditions. The
temperature measurements are used to check the sanitation that takes place in the process.
In anaerobic digestion plants, the sanitation is achieved by a thermophilic anaerobic digestion process or
a pasteurization step. The temperature measurement serves as proof of the adherence to the given
temperature-time specifications.

1 Scope
This document specifies methods for determining temperature-time profiles during composting and
anaerobic digestion for the production of compost and digestate.
The process monitoring is an organized check and recording of the temperature during a specific time of
the composting and anaerobic digestion process.
This document only applies to composting and anaerobic digestion.
This document is intended to be used by manufacturers and enforcement agencies for the purpose of
manufacturing control.
The requirements of this document can differ from national legal requirements for the production
process of compost and digestate.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
CEN/TS 17732, Soil improvers and growing media — Terminology
3 Terms
...