The quality of digestate as organic fertilizer could be described by the four main groups of indicators, namely nutrients content, phase state, stability and impurities content.

There are two main ways how to manage digestate quality, namely prevention and  processing.


The production and recycling of digestate as fertiliser requires quality management and quality control throughout the whole closed cycle of AD, from the production of the AD feedstock until the final utilisation of digestate as fertiliser. Quality management implies the use of controlled high quality feedstock, pre-processing of specific feedstock types, close control of the AD process and of process parameters affecting digestate quality, digestate processing, declaration, optimal storage and application as fertiliser.

Prepared by: Petro Kucheruk – Member of the Expert Council of the Bioenergy Association of Ukraine for the platform of sustainable agribusiness SAF Ukraine.

Read article: “Digestate quality manadgement”. Petro Kucheruk. The platform of sustainable agribusiness SAF Ukraine. April 23, 2020.

The Bioenergy Association of Ukraine since 2019 is a partner of the platform of sustainable agribusiness SAF Ukraine.