CEN/TS 15590:2007

SLOVENSKI STANDARD
01-junij-2007
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Solid recovered fuels - Determination of potential rate of microbial self heating using the
real dynamic respiration index
Feste Sekundärbrennstoffe - Bestimmung des potenziellen Grades der mikrobiellen
Selbstererhitzung mittels des realen dynamischen Respirationsindexes
Combustibles solides de récupération - Détermination du taux d'actitvité microbienne
utilisant l'index de respiration dynamique
Ta slovenski standard je istoveten z: CEN/TS 15590:2007
ICS:
75.160.10 Trda goriva Solid fuels
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

TECHNICAL SPECIFICATION
CEN/TS 15590
SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
March 2007
ICS 75.160.10
English Version
Solid recovered fuels - Determination of potential rate of
microbial self heating using the real dynamic respiration index
Combustibles solides de récupération - Détermination du Feste Sekundärbrennstoffe - Bestimmung des potenziellen
taux d'activité microbienne utilisant l'index de respiration Grades der mikrobiellen Selbstererhitzung mittels des
dynamique realen dynamischen Respirationsindexes
This Technical Specification (CEN/TS) was approved by CEN on 1 January 2007 for provisional application.
The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to submit their
comments, particularly on the question whether the CEN/TS can be converted into a European Standard.
CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS available
promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the CEN/TS)
until the final decision about the possible conversion of the CEN/TS into an EN is reached.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TS 15590:2007: E
worldwide for CEN national Members.

Contents Page
Foreword.3
Introduction .4
1 Scope .5
2 Normative references .5
3 Terms and definitions .5
4 Symbols and abbreviations .6
5 Principle.6
6 Apparatus .6
7 Procedure .8
8 Calculation of the RDRI results.8
9 Test reports .9
Annex A (informative) RDRI trend.11
Annex B (normative) RDRI interpretation .13
Bibliography .14

Foreword
This document (CEN/TS 15590:2007) has been prepared by Technical Committee CEN/TC 343 “Solid
Recovered Fuels”, the secretariat of which is held by SFS.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to announce this Technical Specification: Austria, Belgium, Bulgaria, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and United Kingdom.
Introduction
This document specifies the method used for determining the current rate of potential microbial self-heating of
SRF using the real dynamic respiration index.
Spontaneous combustion can occur when SRF from municipal solid waste or biomasses are stored and/or
transported. The microbial activity, because of aerobic degradation of easily degradable organic matter, acts
as a primer causing the waste temperature to increase until autoxidation and the self-combustion processes
takes place.
The potential self-heating of SRF can be indirectly measured by the real dynamic respiration index (RDRI),
which determines the extent to which easily biodegradable organic matter of a SRF has decomposed.
Therefore, the RDRI identifies the actual point reached in the decomposition process and represents a
gradation on a recognized scale of values, which thus enables a comparison of potential self-heating.
1 Scope
This Technical Specification specifies a method to determine the current rate of potential microbial self-
heating of a solid recovered fuel. The methods indirectly estimate the potential risk of microbial self-heating,
odour production, vector attraction etc. The current rate of biodegradation can be expressed in milligrams O
-1 -1
kg TDS h .
2 Normative references
The following referenced documents are indispensable for the application 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 15357:2006, Solid recovered fuels — Terminology, definitions and descriptions
3 Terms and definitions
For the purposes of this document, the terms and definitions given in CEN/TS 15357:2006 and the following
apply.
3.1
current rate of potential microbial self-heating
measure of the metabolic activity of aerobic micro-organisms expressed as the rate of oxygen uptake
3.2
respiration index
rate of oxygen uptake expressed as milligram oxygen per kilogram total dry solids (TDS) per hour
3.3
real dynamic respiration test
test measuring the respiration index under specific conditions including forced air flow
3.4
real dynamic respiration index
RDRI
average value of the respiration indexes representing 24 h showing the highest aerobic microbial activity (see
Figure A.1)
3.5
lag or latency phase
interval of time required for the microbial flora to acclimatize during the course of the real dynamic
respirometric test
3.6
total dry solids
TDS
solid fraction of a sample that does not evaporate following the determination of the humidity (dry at 105 °C to
a constant weight)
3.7
easily biodegrable organic compounds
organic substances available for decomposition by micro-organisms within a real dynamic respiration test
3.8
self-heating condition
increase in the temperature of a SRF sample due to the heat generated by aerobic metabolism and/or auto-
oxidation processes
4 Symbols and abbreviations
...