kSIST FprEN 17730:2026
(Main)Soil improvers and growing media - Methods for the determination of PAH16, macroscopic impurities above 2 mm, the temperature-time profiles, oxygen uptake rate, self-heating factor and residual biogas potential in compost and digestate when used in fertilizing products
- Abstract
This document specifies references 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 are:
— the determination of the PAH16 content;
— macroscopic impurities above 2 mm;
— 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).
- Status
- Not Published
- Public Enquiry End Date
- 19-Apr-2026
- Technical Committee
- KAT - Soil quality
- Current Stage
- 5020 - Formal vote (FV) (Adopted Project)
- Start Date
- 02-Nov-2026
- Due Date
- 21-Dec-2026
- Mandate
- M/XXX - M/XXX
kSIST FprEN 17730:2026 is the Slovenian adoption of prEN 17730:2026, published by SIST and prepared by CEN for soil improvers and growing media used in fertilizing products. It points users to the methods for determining PAH content, macroscopic impurities, temperature-time profiles, oxygen uptake rate, self-heating factor and residual biogas potential, so laboratories and product assessors know which test to apply for each parameter.
What does kSIST FprEN 17730:2026 specify?
kSIST FprEN 17730:2026 specifies references to test methods for compost, fresh crop digestate and digestate other than fresh crop digestate when they are used as components of fertilizing products. The document names the parameters to be determined, but it does not contain the test methods themselves.
The standard applies to fertilizing product blends when soil improvers and/or growing media are the components with the highest share in the blend by mass or volume, or by dry mass for liquid products. If another component is present in the highest share, the relevant European Standard for that component applies instead. If the blend contains equal quantities, the user decides which standard to use.
The document is organized into scope, normative references, terms and definitions, sampling and sample preparation, determination, and Annex ZA. Annex ZA links the standard to EU fertilising product requirements.
What are the key requirements of kSIST FprEN 17730:2026?
kSIST FprEN 17730:2026 works as a method reference document. Its main requirement is that users follow the cited standards and the cited clauses inside them for sampling, preparation and measurement.
- Sampling - Clause 4.1 requires sampling for quality control to follow EN 12579:2024. In practice, the test result is only as representative as the sample, so correct sampling is the first control point.
- Sample preparation - Clause 4.2 requires sample preparation in accordance with prEN 13040-1:2025, Clauses 6 to 10. This matters because the laboratory sample must be prepared consistently before any chemical or physical determination.
- PAH - Clause 5.1 requires determination of PAH according to prEN 18261:2025, Clause 11. This gives the route for checking polycyclic aromatic hydrocarbons in compost and digestate used in fertilizing products.
- Macroscopic impurities - Clause 5.2 requires determination of glass, metal and plastics above 2 mm according to prEN 16202:2025, Clause 6. In practice, this is the method used to assess visible contamination in compost and digestate other than fresh crop digestate.
- Temperature-time profile - Clause 5.3 requires use of EN 17925:2024, Clause 6. This links the document to monitoring how temperature changes during composting and digestion, which is relevant for process control and product quality assessment.
- Oxygen uptake rate and self-heating factor - Clauses 5.4 and 5.5 point to prEN 16087-1:2025, Clause 8, and prEN 16087-2:2025, Clause 7. These methods are used to judge aerobic biological activity and heating behaviour, which are important for stability and handling.
- Residual biogas potential - Clause 5.6 requires prEN 18256:2025, Clause 8. This supports assessment of remaining gas-forming potential in digestate, which matters for storage and further use.
- Regulatory link - Annex ZA connects clauses 4 and 5 to Regulation (EU) 2019/1009 for CMC 3, CMC 4 and CMC 5. That link is what makes the test results relevant to EU fertilising product conformity assessment.
What terms does kSIST FprEN 17730:2026 define?
kSIST FprEN 17730:2026 uses the terminology from prEN 17732:2025. The key terms used in the document include:
- Compost - A component material covered by the standard and identified in the introduction as CMC 3.
- Fresh crop digestate - A digestate category covered by the standard and identified in the introduction as CMC 4.
- Digestate other than fresh crop digestate - A digestate category covered by the standard and identified in the introduction as CMC 5.
- Soil improver - A bulky component or mix of bulky components that can be part of a fertilizing product blend.
- Growing medium - A bulky, volume-building component or mix of such components, used in blends and covered by the applicability rule.
- Fertilising products - The broader product family that includes fertilizers, liming material, soil improvers, growing media, inhibitors and plant biostimulants.
- PAH - Polycyclic aromatic hydrocarbons, the substance group targeted by the PAH determination.
- PFC / CMC - Product function categories and component material categories used in the EU fertilising products framework.
Who uses kSIST FprEN 17730:2026?
kSIST FprEN 17730:2026 is used by testing laboratories, compost and digestate producers, quality managers, conformity assessment bodies, and technical teams preparing fertilizing products for the EU market. It is also relevant for buyers and regulators who need a common way to specify or verify PAH content, impurities, stability and residual biogas potential. In practice, users apply it when planning sampling, choosing the correct companion standard, and documenting compliance with product requirements.
What changed in kSIST FprEN 17730:2026 from the previous edition?
kSIST FprEN 17730:2026 supersedes CEN/TS 17730:2022. The foreword states these changes compared with that edition:
- the title has been revised
- PAH content and temperature-time profiles have been added to the scope
- an applicability statement has been added to the scope
- Clause 2, Normative references, has been updated
- Clauses 5.1, 5.3 and 5.6 have been added
- Annex ZA has been added
Which standards are used with kSIST FprEN 17730:2026?
The document relies on the following referenced standards:
- EN 12579:2024 - sampling for soil improvers and growing media
- prEN 13040-1:2025 - sample preparation for chemical and physical tests, dry matter, moisture content and laboratory bulk density
- prEN 16087-1:2025 - oxygen uptake rate
- prEN 16087-2:2025 - self-heating test for compost
- prEN 16202:2025 - macroscopic impurities and stones in compost and digestate
- prEN 17732:2025 - terminology
- EN 17925:2024 - temperature-time profiles during composting and digestion
- prEN 18256:2025 - residual biogas potential in digestate
- prEN 18261:2025 - PAH determination by GC and HPLC
Each one supplies the detailed procedure that Clause 5 points to instead of reproducing the test method in this standard.
What does the kSIST FprEN 17730:2026 document contain?
kSIST FprEN 17730:2026 is a reference standard rather than a full test method standard. It contains the scope, the list of normative references, the terminology reference, the sampling and sample preparation requirements, and short clauses that point to the relevant external test methods. Annex ZA contains the correspondence table linking the standard to Regulation (EU) 2019/1009, which is the part used for conformity assessment in the EU fertilising products framework.
Relations
- Revises
SIST-TS CEN/TS 17730:2022 - Compost and digestate properties when used in fertilising products - Effective Date
- 20-Nov-2024
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Frequently Asked Questions
kSIST FprEN 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 2 mm, 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 specifies references 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 are: — the determination of the PAH16 content; — macroscopic impurities above 2 mm; — 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 specifies references 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 are: — the determination of the PAH16 content; — macroscopic impurities above 2 mm; — 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).
kSIST FprEN 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.
kSIST FprEN 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.
kSIST FprEN 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.
kSIST FprEN 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
oSIST prEN 17730:2026
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
oSIST prEN 17730:2026 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
oSIST prEN 17730:2026
oSIST prEN 17730:2026
DRAFT
EUROPEAN STANDARD
prEN 17730
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.
oSIST prEN 17730:2026
prEN 17730:2026 (E)
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
oSIST prEN 17730:2026
prEN 17730:2026 (E)
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.
prEN 17730:2026 includes the following significant technical changes with respect to
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.
oSIST prEN 17730:2026
prEN 17730:2026 (E)
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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