LCA-Assisted Conception of a Digestate Recovery by Micro-Algae Production

Conference Dates

June 5 – 10, 2022


The digestate produced by anaerobic digestion process is a source of nutrients (N, P, K) and organic matter (C content), generally used as spreading in culture to ideally substitute for the use of mineral fertilizers. This type of digestate recovery presents some weaknesses as for example the poor effective substitution due to the relative low content of bio-available nutrients. Thenceforth, a higher benefit for the recovery of digestate could be thought to increase the effective use of nutrients. Instead of direct spreading, a higher quantity of the digestate and the CO2 contained in the biogas could be used in a micro-algae culture. To this end, the BIOMSA system is based on the coupling of anaerobic digestion and micro-algae culture (Figure 1).

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