oSIST prEN 17730:2026
(Main)Soil improvers and growing media - Methods for the determination of PAH16, macroscopic impurities above 2mm, the temperature-time profiles, oxygen uptake rate, self-heating factor and residual biogas potential in compost and digestate when used in fertilizing products
Soil improvers and growing media - Methods for the determination of PAH16, macroscopic impurities above 2mm, the temperature-time profiles, oxygen uptake rate, self-heating factor and residual biogas potential in compost and digestate when used in fertilizing products
This document refers to methods to be used for the determination of specific parameters in compost, fresh crop digestate and digestate other than fresh crop digestate when used as components of fertilizing products, but does not contain the methods themselves. The specific parameters in this document include:
— the determination of the PAH16 content;
— macroscopic impurities;
— the determination of temperature-time profiles during composting and digestion;
— oxygen uptake rate;
— self-heating factor;
— the determination of the residual biogas potential in digestate.
This document is applicable to the fertilizing product blends where a blend is a mix of two or more fertilising products belonging to the categories of fertilizers, liming material, soil improvers, growing media, inhibitors and plant biostimulants, and where soil improvers and/or growing media are the components with the highest percentage in the blend by mass or volume, or in the case of products in liquid form by dry mass. If the soil improvers and/or growing media are not the components with the highest percentage in the blend, the European Standard relevant to the component with the highest percentage in the blend applies. In case a blend is composed of fertilising products mixed in equal quantities, the user of the standard decides which standard to apply.
NOTE A soil improver or a growing medium consists of a single bulky (volume-building) component or a mix of bulky (volume-building) components (for example peat, wood fibres, coconut coir, compost, expanded perlite).
Eigenschaften von Kompost und Gärrückständen bei Verwendung in Düngeprodukten
Dieses Dokument bezieht sich auf zur Bestimmung spezifischer Parameter in Kompost, frischen Gärrückständen von Pflanzen sowie anderen Gärrückständen als frischen Gärrückständen von Pflanzen, wenn diese als Komponenten von Düngeprodukten verwendet werden, anzuwendende Verfahren, beinhaltet aber nicht die Verfahren selbst. Die spezifischen Parameter in diesem Dokument sind:
Bestimmung des PAK16 Gehalts;
makroskopische Verunreinigungen;
Bestimmung der Temperatur-Zeit-Profile während der Kompostierung und Vergärung;
Sauerstoffaufnahmerate;
Selbsterhitzungsfaktor;
Bestimmung des Restbiogaspotentials von Gärrückständen.
Dieses Dokument ist anwendbar auf Düngeproduktmischungen, bei denen eine Mischung aus mindestens zwei Düngeprodukten der folgenden Kategorien besteht: Düngemittel, Kalkdünger, Bodenverbesserungsmittel, Kultursubstrate, Hemmstoffe und Pflanzen-Biostimulanzien, und wenn die Kategorien „Bodenverbesserungsmittel“ und/oder „Kultursubstrate“ den höchsten Prozentsatz in der Mischung bezüglich Masse oder Volumen, oder im Falle von flüssigen Formen bezüglich Trockenmasse ausmachen. Wenn die Bodenverbesserungsmittel und/oder Kultursubstrate nicht den höchsten Prozentsatz in der Mischung ausmachen, gilt die Europäische Norm für die Komponente mit dem höchsten Prozentsatz der Mischung. Im Falle, dass die Düngeproduktmischung aus Komponenten gleicher Menge besteht, entscheidet der Anwender, welche Norm angewendet wird.
ANMERKUNG Ein Bodenverbesserungsmittel oder Kultursubstrat besteht aus einem einzigen schüttfähigen (Volumen aufbauenden) Bestandteil oder aus einem Gemisch schüttfähiger (Volumen aufbauender) Bestandteile (z. B. Torf, Holzfasern, Kokosfasern, Kompost, Blähperlit).
Amendements du sol et supports de culture - Vue d'ensemble des méthodes pour la détermination du PAH16, des impuretés macroscopiques supérieures à 2mm, des profils de température et de temps, du taux d'absorption de l'oxygène, du facteur d'auto-échauffement, et du potentiel résiduel du biogaz dans le compost et les digestats lors de leur utilisation dans les matières fertilisantes
Le présent document se réfère aux méthodes à utiliser pour la détermination de paramètres spécifiques dans le compost, le digestat issu de cultures végétales et le digestat autre qu’issu de cultures végétales lorsqu’ils sont utilisés comme composants de fertilisants, mais ne contient pas les méthodes elles-mêmes. Les paramètres spécifiques du présent document comprennent :
— la détermination de la teneur en HAP16 ;
— les impuretés macroscopiques ;
— la détermination des profils température-temps lors du compostage et de la digestion ;
— la cinétique d’absorption de l’oxygène ;
— le facteur d’auto-échauffement ;
— la détermination du potentiel de production de biogaz résiduel dans le digestat.
Le présent document est applicable aux mélanges de fertilisants constitués d’au moins deux fertilisants appartenant aux catégories suivantes : engrais, amendements minéraux basiques, amendements du sol, supports de culture, inhibiteurs et biostimulants des végétaux et, dans lesquels les amendements du sol et/ou les supports de culture sont les composants qui représentent le pourcentage le plus élevé du mélange en masse ou en volume, ou dans le cas d’un liquide, en masse sèche. Si les amendements du sol et/ou les supports de culture ne sont pas les composants qui représentent le pourcentage le plus élevé du mélange, la Norme européenne applicable au composant ayant le pourcentage le plus élevé dans le mélange s’applique. Dans le cas où le mélange de fertilisants est constitué de composants en quantités égales, l’utilisateur décide quelle norme appliquer.
NOTE Un amendement du sol ou un support de culture se compose d’un seul composant volumineux (augmentant le volume) ou d’un mélange de composants volumineux (augmentant le volume) (par exemple, la tourbe, les fibres de bois, la fibre de coco, le compost, la perlite expansée).
Izboljševalci tal in rastni substrati - Metode za določanje PAH16, makroskopskih nečistoč, večjih od 2 mm, temperaturno-časovnih profilov, stopnje porabe kisika, faktorja samoogrevanja in preostalega potenciala bioplina v kompostu in digestatu pri njuni uporabi v gnojilih
General Information
- Status
- Not Published
- Public Enquiry End Date
- 19-Apr-2026
- Technical Committee
- KAT - Soil quality
- Current Stage
- 4020 - Public enquire (PE) (Adopted Project)
- Start Date
- 11-Feb-2026
- Due Date
- 01-Jul-2026
- Mandate
- M/XXX - M/XXX
Relations
- Revises
SIST-TS CEN/TS 17730:2022 - Compost and digestate properties when used in fertilising products - Effective Date
- 20-Nov-2024
Overview
oSIST prEN 17730:2026 specifies the methods to be used for the determination of key parameters in soil improvers, growing media, compost, and digestate intended for use in fertilizing products. Developed by CEN, this standard applies to compost, fresh crop digestate, and digestate other than fresh crop digestate when they are components of fertilizer blends. The standard ensures compliance with essential safety, quality, and environmental requirements as set out by Regulation (EU) 2019/1009. Although oSIST prEN 17730:2026 does not contain the analytical methods themselves, it refers to specific standardized methods to determine chemical and physical parameters vital for product safety and marketability.
Key Topics
The standard covers the determination of several critical parameters in compost and digestate to ensure the quality and safety of fertilizing products:
- PAH16 content: Ensures monitoring of polycyclic aromatic hydrocarbons, which are important environmental contaminants.
- Macroscopic impurities above 2mm: Quantifies physical contaminants such as glass, metal, and plastics.
- Temperature-time profiles: Monitors biological activity during composting and digestion, contributing to process validation and safety.
- Oxygen uptake rate: Assesses aerobic biological degradation, a key indicator of compost and digestate stability.
- Self-heating factor: Evaluates the tendency of compost and digestate materials to undergo thermal self-heating, reflecting biological stability.
- Residual biogas potential: Determines the remaining capacity for biogas production in digestate, important for assessing stability and environmental impact.
These parameters are crucial for producers, laboratories, and regulatory bodies in verifying fertilizing product safety, quality, and compliance with European regulations.
Applications
oSIST prEN 17730:2026 is highly relevant to stakeholders in the fertilizer and soil amendment industries, offering the following practical applications:
- Quality assurance: Ensures that compost and digestate components of fertilizing products meet EU regulatory limits for contaminants and stability.
- Environmental protection: Reduces the risk of soil and groundwater contamination by monitoring PAH16 and macroscopic impurities.
- Process optimization: Provides essential information for optimizing composting and anaerobic digestion processes by tracking biological activity and stability indicators.
- Regulatory compliance: Facilitates conformity with Regulation (EU) 2019/1009, which is mandatory for marketing soil improvers and growing media within the EU.
- Product development: Supports manufacturers in developing new blends of soil improvers, growing media, fertilizers, liming materials, inhibitors, or plant biostimulants, especially where these are dominant components in a blend.
The standard is applicable to both solid and liquid fertilizing product blends, where soil improvers and/or growing media are present in the highest proportion by mass, volume, or dry matter for liquids.
Related Standards
oSIST prEN 17730:2026 references several key European standards for laboratory testing and product assessment:
- EN 12579:2024 - Sampling of soil improvers and growing media.
- prEN 13040-1:2025 - Sample preparation for physical and chemical testing.
- prEN 16087-1:2025 - Determination of the oxygen uptake rate.
- prEN 16087-2:2025 - Self-heating test for compost.
- prEN 16202:2025 - Determination of macroscopic impurities and stones.
- prEN 17732:2025 - Terminology for soil improvers and growing media.
- EN 17925:2024 - Temperature-time profiles during composting and digestion.
- prEN 18256:2025 - Determination of residual biogas potential.
- prEN 18261:2025 - Determination of PAH by GC and HPLC.
Collectively, these referenced standards form a robust framework for ensuring the safety, quality, and marketability of soil improvers, compost, and digestate in fertilizing products across Europe.
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Frequently Asked Questions
oSIST prEN 17730:2026 is a draft published by the Slovenian Institute for Standardization (SIST). Its full title is "Soil improvers and growing media - Methods for the determination of PAH16, macroscopic impurities above 2mm, the temperature-time profiles, oxygen uptake rate, self-heating factor and residual biogas potential in compost and digestate when used in fertilizing products". This standard covers: This document refers to methods to be used for the determination of specific parameters in compost, fresh crop digestate and digestate other than fresh crop digestate when used as components of fertilizing products, but does not contain the methods themselves. The specific parameters in this document include: — the determination of the PAH16 content; — macroscopic impurities; — the determination of temperature-time profiles during composting and digestion; — oxygen uptake rate; — self-heating factor; — the determination of the residual biogas potential in digestate. This document is applicable to the fertilizing product blends where a blend is a mix of two or more fertilising products belonging to the categories of fertilizers, liming material, soil improvers, growing media, inhibitors and plant biostimulants, and where soil improvers and/or growing media are the components with the highest percentage in the blend by mass or volume, or in the case of products in liquid form by dry mass. If the soil improvers and/or growing media are not the components with the highest percentage in the blend, the European Standard relevant to the component with the highest percentage in the blend applies. In case a blend is composed of fertilising products mixed in equal quantities, the user of the standard decides which standard to apply. NOTE A soil improver or a growing medium consists of a single bulky (volume-building) component or a mix of bulky (volume-building) components (for example peat, wood fibres, coconut coir, compost, expanded perlite).
This document refers to methods to be used for the determination of specific parameters in compost, fresh crop digestate and digestate other than fresh crop digestate when used as components of fertilizing products, but does not contain the methods themselves. The specific parameters in this document include: — the determination of the PAH16 content; — macroscopic impurities; — the determination of temperature-time profiles during composting and digestion; — oxygen uptake rate; — self-heating factor; — the determination of the residual biogas potential in digestate. This document is applicable to the fertilizing product blends where a blend is a mix of two or more fertilising products belonging to the categories of fertilizers, liming material, soil improvers, growing media, inhibitors and plant biostimulants, and where soil improvers and/or growing media are the components with the highest percentage in the blend by mass or volume, or in the case of products in liquid form by dry mass. If the soil improvers and/or growing media are not the components with the highest percentage in the blend, the European Standard relevant to the component with the highest percentage in the blend applies. In case a blend is composed of fertilising products mixed in equal quantities, the user of the standard decides which standard to apply. NOTE A soil improver or a growing medium consists of a single bulky (volume-building) component or a mix of bulky (volume-building) components (for example peat, wood fibres, coconut coir, compost, expanded perlite).
oSIST prEN 17730:2026 is classified under the following ICS (International Classification for Standards) categories: 65.080 - Fertilizers. The ICS classification helps identify the subject area and facilitates finding related standards.
oSIST prEN 17730:2026 has the following relationships with other standards: It is inter standard links to SIST-TS CEN/TS 17730:2022. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
oSIST prEN 17730:2026 is associated with the following European legislation: EU Directives/Regulations: 2003/2003, 2019/1009; Standardization Mandates: M/564, M/564 AMD 1, M/564 AMD 2, M/XXX. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
oSIST prEN 17730:2026 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-april-2026
Izboljševalci tal in rastni substrati - Metode za določanje PAH16, makroskopskih
nečistoč, večjih od 2 mm, temperaturno-časovnih profilov, stopnje porabe kisika,
faktorja samoogrevanja in preostalega potenciala bioplina v kompostu in
digestatu pri njuni uporabi v gnojilih
Soil improvers and growing media - Methods for the determination of PAH16,
macroscopic impurities above 2mm, the temperature-time profiles, oxygen uptake rate,
self-heating factor and residual biogas potential in compost and digestate when used in
fertilizing products
Eigenschaften von Kompost und Gärrückständen bei Verwendung in Düngeprodukten
Amendements du sol et supports de culture - Vue d'ensemble des méthodes pour la
détermination du PAH16, des impuretés macroscopiques supérieures à 2mm, des profils
de température et de temps, du taux d'absorption de l'oxygène, du facteur d'auto-
échauffement, et du potentiel résiduel du biogaz dans le compost et les digestats lors de
leur utilisation dans les matières fertilisantes
Ta slovenski standard je istoveten z: prEN 17730
ICS:
65.080 Gnojila Fertilizers
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2026
ICS 65.080 Will supersede CEN/TS 17730:2022
English Version
Soil improvers and growing media - Methods for the
determination of PAH16, macroscopic impurities above
2mm, the temperature-time profiles, oxygen uptake rate,
self-heating factor and residual biogas potential in
compost and digestate when used in fertilizing products
Amendements du sol et supports de culture - Méthodes Bodenverbesserungsmittel und Kultursubstrate -
de détermination des HAP16, des impuretés Verfahren zur Bestimmung von PAK16,
macroscopiques supérieures à 2 mm, des profils makroskopischen Verunreinigungen über 2 mm,
température-temps, de la cinétique d'absorption de Temperatur-Zeit-Profilen, Sauerstoffaufnahmerate,
l'oxygène, du facteur d'auto-échauffement et du Selbsterhitzungsfaktor und Restbiogaspotenzial in
potentiel de production de biogaz résiduel dans le Kompost und Gärgut bei Verwendung in
compost et le digestat lorsqu'ils sont utilisés dans les Düngeprodukten
fertilisants
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 223.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 17730:2026 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Sampling and sample preparation . 6
4.1 Sampling . 6
4.2 Sample preparation . 6
5 Determination . 6
5.1 Determination of PAH . 6
5.2 Determination of the content of macroscopic impurities (glass, metal, plastics) above
2 mm . 6
5.3 Determination of the temperature-time profile . 6
5.4 Determination of the oxygen uptake rate . 6
5.5 Determination of the self-heating factor . 6
5.6 Determination of the residual biogas potential. 6
Bibliography . 9
European foreword
This document (prEN 17730:2026) has been prepared by Technical Committee CEN/TC 223 “Soil
improvers and growing media”, the secretariat of which is held by NEN.
This document is currently submitted to the CEN Enquiry.
This document will supersede CEN/TS 17730:2022.
CEN/TS 17730:2022:
— The title has been revised;
— The determination of the PAH content and the determination of temperature-time profiles during
composting and digestion have been included in the Scope;
— An applicability statement has been included in the Scope;
— Clause 2, Normative references, has been updated;
— The following has been added:
— Clause 5.1, Determination of PAH
— Clause 5.3, Determination of the temperature-time profile
— Clause 5.6, Determination of the residual biogas potential
— Annex ZA has been added.
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.
For the relationship with EU Legislation, see informative Annex ZA, which is an integral part of this
document.
Introduction
Different product functions warrant different product safety, quality and quantity requirements adapted
to their different intended uses. EU fertilizing products have therefore been divided into different product
function categories (PFCs), which are subject to specific safety, quality and quantity requirements, as
specified in the Regulation (EU) 2019/1009 [1]. EU fertilizing products consist of component materials
complying with the requirements for one or more of the component material categories (CMCs), as
specified in the Regulation (EU) 2019/1009 [1].
Compost has been classified as CMC 3, fresh crop digestate as CMC 4, and digestate other than fresh crop
digestate as CMC 5. The specific safety and quality requirements in relation to specific parameters are
specified in this document, as well as normative references of the test methods to be used to assess the
com
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