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Quality assurance of digestate inSwitzerland
Cork / Ireland - September 2011
IEA Bioenergy Task 37
Nathalie BACHMANN
EREP SA | Chemin du Coteau 28 | CH 1123 Aclens - Switzerland
- Hygienic requirements (input criteria, retention timeand temperature in the digester, how to avoidrecontamination)
- Physical and chemical propreties (dry/organicmatter, pH, salt content, C/N, nitrate, nitrite)
Directives and guidelines
EREP SA Switzerland – Quality assurance of digestate 16
Utilisation and application:
- Which product for which utilisation
- Impacts on soil quality
- Period of application (seasonal, daily andmeteorological conditions)
- How much to apply
- How to apply (technology)
Perspectives
EREP SA Switzerland – Quality assurance of digestate 17
Long term experiments / «essais-vitrines»- Tests of minimum 5 years- Analysis of the long term effects of digestateunder different conditions (soil, climate, crops):Nutrients, humus content, soil structure, diseasesupression
LogoBased on the guideline for compost and digestate
Training programEstablishment of a unified training and retrainingprogram
Photo: Fibl Schweiz
Thank you for your attention!
EREP SA Switzerland – Quality assurance of digestate 18
Law
Dir
ecti
ves
an
dg
uid
eli
nes
Digestateproducer
Digestateuser
VKS
Inspection commission /inspectors
Canton
Controlling,consulting,certification
Contract
EREP SA Switzerland – Quality assurance of digestate 19
Contract
Database (CVIS)
Annual report
VKS : Association of composting and digestion facilities