SIST EN ISO 23590:2022
(Main)Household biogas system requirements: design, installation, operation, maintenance and safety (ISO 23590:2020)
Household biogas system requirements: design, installation, operation, maintenance and safety (ISO 23590:2020)
This document covers the requirements for the design, installation, operation, maintenance and the safety of Household Biogas Systems (HBSs), producing biogas in an amount equivalent to an installation capacity of less than 100 MWh per year.
The document applies to HBSs comprising of pipeline and equipment with pressure levels of less than 5 kPa.
Any equipment or appliances connected to an HBS or utilizing the biogas energy of an HBS are not a part of the scope of this document.
Anforderungen an häusliche Biogasanlagen: Auslegung, Aufbau, Betrieb, Instandhaltung und Sicherheit (ISO 23590:2020)
Dieses Dokument behandelt die Anforderungen an Auslegung, Aufbau, Betrieb, Instandhaltung und Sicherheit von häuslichen Biogasanlagen (HBS, en: Household Biogas Systems), mit denen Biogas in einer Menge erzeugt wird, die einer Anlagenkapazität von weniger als 100 MWh je Jahr entspricht.
Das Dokument gilt für HBS, die aus Rohrleitungen und Geräten mit Druckstufen von weniger als 5 kPa bestehen.
Anlagen oder Geräte, die an eine HBS angeschlossen sind oder die die Biogasenergie einer HBS nutzen, fallen nicht in den Anwendungsbereich dieses Dokuments.
Exigences relatives aux systèmes de biogaz domestiques: conception, installation, utilisation, maintenance et sécurité (ISO 23590:2020)
La présente norme couvre les exigences relatives à la conception, l'installation, l'utilisation, la maintenance et la sécurité des systèmes de biogaz domestiques (HBS) qui produisent du biogaz dans des quantités équivalant à une capacité d'installation inférieure à 100 MWh par an.
La présente norme s'applique aux systèmes HBS avec canalisations et équipements dont les niveaux de pression sont inférieurs à 5 kPa.
Les équipements ou appareils raccordés à un système HBS ou utilisant l'énergie biogaz d'un tel système ne relèvent pas du domaine d'application de la présente norme.
Zahteve za gospodinjske sisteme za proizvodnjo bioplina: načrtovanje, vgradnja, obratovanje, vzdrževanje in varnost (ISO 23590:2020)
Ta dokument zajema zahteve za načrtovanje, vgradnjo, obratovanje, vzdrževanje in varnost gospodinjskih sistemov za proizvodnjo bioplina (HBS), ki proizvajajo bioplin v količini, ki je enaka zmogljivosti manj kot 100 MWh na leto.
Dokument se uporablja za sisteme HBS, sestavljene iz cevi in opreme s tlakom, nižjim od 5 kPa.
Oprema ali naprave, ki so povezane s sistemom HBS ali uporabljajo energijo bioplina sistema HBS, niso del področja uporabe tega dokumenta.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 23590:2022
01-februar-2022
Zahteve za gospodinjske sisteme za proizvodnjo bioplina: načrtovanje, vgradnja,
obratovanje, vzdrževanje in varnost (ISO 23590:2020)
Household biogas system requirements: design, installation, operation, maintenance and
safety (ISO 23590:2020)
Anforderungen an häusliche Biogasanlagen: Auslegung, Aufbau, Betrieb, Instandhaltung
und Sicherheit (ISO 23590:2020)
Exigences relatives aux systèmes de biogaz domestiques: conception, installation,
utilisation, maintenance et sécurité (ISO 23590:2020)
Ta slovenski standard je istoveten z: EN ISO 23590:2021
ICS:
27.190 Biološki viri in drugi Biological sources and
alternativni viri energije alternative sources of energy
SIST EN ISO 23590:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 23590:2022
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SIST EN ISO 23590:2022
EN ISO 23590
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2021
EUROPÄISCHE NORM
ICS 27.190
English Version
Household biogas system requirements: design,
installation, operation, maintenance and safety (ISO
23590:2020)
Exigences relatives aux systèmes de biogaz (ISO 23590:2020)
domestiques: conception, installation, utilisation,
maintenance et sécurité (ISO 23590:2020)
This European Standard was approved by CEN on 29 November 2021.
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, Turkey 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
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 23590:2021 E
worldwide for CEN national Members.
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SIST EN ISO 23590:2022
EN ISO 23590:2021 (E)
Contents Page
European foreword . 3
2
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SIST EN ISO 23590:2022
EN ISO 23590:2021 (E)
European foreword
The text of ISO 23590:2020 has been prepared by Technical Committee ISO/TC 255 "Biogas” of the
International Organization for Standardization (ISO) and has been taken over as EN ISO 23590:2021 by
Technical Committee CEN/TC 408 “Natural gas and biomethane for use in transport and biomethane for
injection in the natural gas grid” the secretariat of which is held by AFNOR.
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 June 2022, and conflicting national standards shall be
withdrawn at the latest by June 2022.
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.
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 organizations 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, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 23590:2020 has been approved by CEN as EN ISO 23590:2021 without any modification.
3
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SIST EN ISO 23590:2022
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SIST EN ISO 23590:2022
INTERNATIONAL ISO
STANDARD 23590
First edition
2020-12
Household biogas system
requirements: design, installation,
operation, maintenance and safety
Exigences relatives aux systèmes de biogaz domestiques: conception,
installation, utilisation, maintenance et sécurité
Reference number
ISO 23590:2020(E)
©
ISO 2020
---------------------- Page: 7 ----------------------
SIST EN ISO 23590:2022
ISO 23590:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020
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 the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 23590:2022
ISO 23590:2020(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative References . 1
3 Terms and Definitions . 1
4 Symbols and Abbreviated Terms . 4
5 Household Biogas System (HBS) Design and Construction . 4
5.1 HBS general design . 4
5.2 Materials . 5
5.3 Digester . 5
5.3.1 General. 5
5.3.2 Digester size . 5
5.4 Pipes, Fittings and Connections . 6
6 Components Testing and Sampling Criteria . 6
7 System Manuals . 7
8 Prerequisites for Installation . 7
9 Household Biogas System Operation. 7
10 Maintenance and Troubleshooting . 8
11 Markings . 9
12 Safety . 9
13 Warranty and Guarantee .10
Annex A Schematic of Household Biogas System .11
Annex B Effects on Humans for Different Concentrations of H S .12
2
Bibliography .13
© ISO 2020 – All rights reserved iii
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SIST EN ISO 23590:2022
ISO 23590:2020(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 255, Biogas.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved
---------------------- Page: 10 ----------------------
SIST EN ISO 23590:2022
ISO 23590:2020(E)
Introduction
A household biogas system processes organic waste such as food scraps and manure into biogas which
can be used for cooking, and into digestate that is convertible to natural fertilizer which can be used for
gardening or soil improvement.
Biogas is a flammable gas, mainly composed of methane and carbon dioxide, generated by the anaerobic
fermentation (without oxygen) of organic matter.
A household biogas system operates as a continuous-flow system, i.e. organic waste is fed in one end,
and the gas and fertilizer are emitted from the other. The generated biogas is filtered to remove any
unpleasant odours and toxic gases.
The digestate can be sanitized to reduce the amount of active pathogens in the effluent.
This document for Household Biogas Systems covers the small sized production and output of biogas
for personal use in homes, kitchens, small farms, etc.
This document is applicable to all types and styles of household biogas systems, and it does not address
any particular manufacturer of household biogas systems.
© ISO 2020 – All rights reserved v
---------------------- Page: 11 ----------------------
SIST EN ISO 23590:2022
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SIST EN ISO 23590:2022
INTERNATIONAL STANDARD ISO 23590:2020(E)
Household biogas system requirements: design,
installation, operation, maintenance and safety
1 Scope
This document covers the requirements for the design, installation, operation, maintenance and the
safety of Household Biogas Systems (HBSs), producing biogas in an amount equivalent to an installation
capacity of less than 100 MWh per year.
The document applies to HBSs comprising of pipeline and equipment with pressure levels of less
than 5 kPa.
Any equipment or appliances connected to an HBS or utilizing the biogas energy of an HBS are not a
part of the scope of this document.
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.
3 Terms and Definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
anaerobic digestion
biological conversion of biodegradable materials by micro-organisms in the absence of oxygen creating
two main products: biogas (3.2) and digestate (3.6)
[SOURCE: ISO 20675:2018, 3.1]
3.2
biogas
gas produced by anaerobic digestion of organic matter without further upgrading or purification
[SOURCE: ISO 20675:2018, 3.2, modified — 'gasification of biomass or power to gas from biomass
sources' removed.]
3.3
biogas installation
installation including its pipelines, pipes and accessories for anaerobic digestion of biomass (3.5)
[SOURCE: ISO 20675:2018, 3.5, modified — 'gasification of biomass and waste, upgrading of biogas,
liquefaction of biogas, storage of CO , storage of auxiliaries, storage of biomass and digestate' removed.]
2
© ISO 2020 – All rights reserved 1
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SIST EN ISO 23590:2022
ISO 23590:2020(E)
3.4
biogas storage
buffer, gas holder, tank, vessel, bag or similar to store biogas (3.2)
[SOURCE: ISO 20675:2018, 3.7]
3.5
biomass
material of biological origin excluding material embedded in geological formations and/or transformed
to fossilized material
[SOURCE: ISO 20675:2018, 3.9]
3.6
digestate
remaining effluent from the anaerobic digestion process including solid fraction and liquid fraction
[SOURCE: ISO 20675:2018, 3.19]
3.7
digester
anaerobic digestion installation including reactors, tanks and related equipment
[SOURCE: ISO 20675:2018, 3.20]
3.8
hydraulic retention time
theoretical average period of time a soluble compound remains in the digester (3.7)
3
Note 1 to entry: The hydraulic retention time (HRT) is calculated as net digester volume (m )/daily feedstock
3
input (m /day).
[SOURCE: ISO 20675:2018, 3.28]
3.9
household biogas system
biogas installation which uses biomass from a single household for its own consumption and consists of
a digester and an application for cooking, heating, lighting or electrical power
[SOURCE: ISO 20675:2018, B.3.1.1]
3.10
household biogas system owner
legal entity, a company or natural person owning the biogas installation (3.3)
[SOURCE: ISO 20675:2018, 3.31 modified — term changed from 'installation owner'.]
3.11
methane content
mol percentage of methane in biogas (3.2)
3.12
organic dry matter
part of biomass (3.5) or digestate (3.6) which consists of dr
...
SLOVENSKI STANDARD
oSIST prEN ISO 23590:2021
01-september-2021
Zahteve za gospodinjske sisteme za proizvodnjo bioplina: načrtovanje, vgradnja,
obratovanje, vzdrževanje in varnost (ISO 23590:2020)
Household biogas system requirements: design, installation, operation, maintenance and
safety (ISO 23590:2020)
Exigences relatives aux systèmes de biogaz domestiques: conception, installation,
utilisation, maintenance et sécurité (ISO 23590:2020)
Ta slovenski standard je istoveten z: prEN ISO 23590
ICS:
27.190 Biološki viri in drugi Biological sources and
alternativni viri energije alternative sources of energy
oSIST prEN ISO 23590:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
oSIST prEN ISO 23590:2021
---------------------- Page: 2 ----------------------
oSIST prEN ISO 23590:2021
INTERNATIONAL ISO
STANDARD 23590
First edition
2020-12
Household biogas system
requirements: design, installation,
operation, maintenance and safety
Exigences relatives aux systèmes de biogaz domestiques: conception,
installation, utilisation, maintenance et sécurité
Reference number
ISO 23590:2020(E)
©
ISO 2020
---------------------- Page: 3 ----------------------
oSIST prEN ISO 23590:2021
ISO 23590:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020
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 the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 4 ----------------------
oSIST prEN ISO 23590:2021
ISO 23590:2020(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative References . 1
3 Terms and Definitions . 1
4 Symbols and Abbreviated Terms . 4
5 Household Biogas System (HBS) Design and Construction . 4
5.1 HBS general design . 4
5.2 Materials . 5
5.3 Digester . 5
5.3.1 General. 5
5.3.2 Digester size . 5
5.4 Pipes, Fittings and Connections . 6
6 Components Testing and Sampling Criteria . 6
7 System Manuals . 7
8 Prerequisites for Installation . 7
9 Household Biogas System Operation. 7
10 Maintenance and Troubleshooting . 8
11 Markings . 9
12 Safety . 9
13 Warranty and Guarantee .10
Annex A Schematic of Household Biogas System .11
Annex B Effects on Humans for Different Concentrations of H S .12
2
Bibliography .13
© ISO 2020 – All rights reserved iii
---------------------- Page: 5 ----------------------
oSIST prEN ISO 23590:2021
ISO 23590:2020(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 255, Biogas.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved
---------------------- Page: 6 ----------------------
oSIST prEN ISO 23590:2021
ISO 23590:2020(E)
Introduction
A household biogas system processes organic waste such as food scraps and manure into biogas which
can be used for cooking, and into digestate that is convertible to natural fertilizer which can be used for
gardening or soil improvement.
Biogas is a flammable gas, mainly composed of methane and carbon dioxide, generated by the anaerobic
fermentation (without oxygen) of organic matter.
A household biogas system operates as a continuous-flow system, i.e. organic waste is fed in one end,
and the gas and fertilizer are emitted from the other. The generated biogas is filtered to remove any
unpleasant odours and toxic gases.
The digestate can be sanitized to reduce the amount of active pathogens in the effluent.
This document for Household Biogas Systems covers the small sized production and output of biogas
for personal use in homes, kitchens, small farms, etc.
This document is applicable to all types and styles of household biogas systems, and it does not address
any particular manufacturer of household biogas systems.
© ISO 2020 – All rights reserved v
---------------------- Page: 7 ----------------------
oSIST prEN ISO 23590:2021
---------------------- Page: 8 ----------------------
oSIST prEN ISO 23590:2021
INTERNATIONAL STANDARD ISO 23590:2020(E)
Household biogas system requirements: design,
installation, operation, maintenance and safety
1 Scope
This document covers the requirements for the design, installation, operation, maintenance and the
safety of Household Biogas Systems (HBSs), producing biogas in an amount equivalent to an installation
capacity of less than 100 MWh per year.
The document applies to HBSs comprising of pipeline and equipment with pressure levels of less
than 5 kPa.
Any equipment or appliances connected to an HBS or utilizing the biogas energy of an HBS are not a
part of the scope of this document.
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.
3 Terms and Definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
anaerobic digestion
biological conversion of biodegradable materials by micro-organisms in the absence of oxygen creating
two main products: biogas (3.2) and digestate (3.6)
[SOURCE: ISO 20675:2018, 3.1]
3.2
biogas
gas produced by anaerobic digestion of organic matter without further upgrading or purification
[SOURCE: ISO 20675:2018, 3.2, modified — 'gasification of biomass or power to gas from biomass
sources' removed.]
3.3
biogas installation
installation including its pipelines, pipes and accessories for anaerobic digestion of biomass (3.5)
[SOURCE: ISO 20675:2018, 3.5, modified — 'gasification of biomass and waste, upgrading of biogas,
liquefaction of biogas, storage of CO , storage of auxiliaries, storage of biomass and digestate' removed.]
2
© ISO 2020 – All rights reserved 1
---------------------- Page: 9 ----------------------
oSIST prEN ISO 23590:2021
ISO 23590:2020(E)
3.4
biogas storage
buffer, gas holder, tank, vessel, bag or similar to store biogas (3.2)
[SOURCE: ISO 20675:2018, 3.7]
3.5
biomass
material of biological origin excluding material embedded in geological formations and/or transformed
to fossilized material
[SOURCE: ISO 20675:2018, 3.9]
3.6
digestate
remaining effluent from the anaerobic digestion process including solid fraction and liquid fraction
[SOURCE: ISO 20675:2018, 3.19]
3.7
digester
anaerobic digestion installation including reactors, tanks and related equipment
[SOURCE: ISO 20675:2018, 3.20]
3.8
hydraulic retention time
theoretical average period of time a soluble compound remains in the digester (3.7)
3
Note 1 to entry: The hydraulic retention time (HRT) is calculated as net digester volume (m )/daily feedstock
3
input (m /day).
[SOURCE: ISO 20675:2018, 3.28]
3.9
household biogas system
biogas installation which uses biomass from a single household for its own consumption and consists of
a digester and an application for cooking, heating, lighting or electrical power
[SOURCE: ISO 20675:2018, B.3.1.1]
3.10
household biogas system owner
legal entity, a company or natural person owning the biogas installation (3.3)
[SOURCE: ISO 20675:2018, 3.31 modified — term changed from 'installation owner'.]
3.11
methane content
mol percentage of methane in biogas (3.2)
3.12
organic dry matter
part of biomass (3.5) or digestate (3.6) which consists of dry matter containing carbon and originating
from living materials
[SOURCE: ISO 20675:2018, 3.44]
2 © ISO 2020 – All rights reserved
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oSIST prEN ISO 23590:2021
ISO 23590:2020(E)
3.13
organic loading rate digester
amount of volatile organic dry matter (3.12) entering the anaerobic digester (3.7) over time, measured
3
in kilograms per m net digester volume and day
Note 1 to entry: The organic load gives an indication on biological degradation of the substrates (3.18). It provides
information on nutrient supply levels of the microorganisms involved, overload or undersupply of the system as
well as resulting technical and process control measures to be taken. The organic load describes the efficiency of
the anaerobic digester.
[SOURCE: ISO 20675:2018, 3.45]
3.14
raw biogas
biogas (3.2) directly from the digester (3.7) which is not conditioned, so it is not dried and cleaned
[SOURCE: ISO 20675:2018, 3.48]
3.15
solid retention time (SRT)
period of time expressed in days the biomass (3.2) is in the digester (3.7) for anaerobic digestion
Note 1 to entry: The solid retention time (SRT) is calculated as the net capacity for biomass content in the digester
(kg)/daily feedstock input (kg/day).
[SOURCE: ISO 20675:2018, 3.53]
3.16
specific biogas production
standard state volumetric biogas (3.2) production expressed in normal cubic meters per liquid volume
in cubic meters of the digester per day
[SOURCE: ISO 20675:2018, 3.54]
3.17
specific biogas yield
standard state volumetric biogas production expressed in normal cubic meters per kilogram organic
dry matter (3.12) of the feedstock
[SOURCE: ISO 20675:2018, 3.55]
3.18
substrate
part of the biomass (3.5) which is biodegradable and converted by micro-organisms and/or enzymes as
catalyst into biogas (3.2)
[SOURCE: ISO 20675:2018, 3.56]
3.19
supplier of the household biogas system
legal entity or a company which designs, manufactures or constructs and delivers the biogas installation
(3.3) to the household biogas system owner (3.10)
[SOURCE: ISO 20675:2018, 3.57]
© ISO 2020 –
...
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