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Batta, Neha

Berruti, Franco

Moreira, Cesar M

Rehmann, Lars

Sarchami, Tahereh

English

Engineering Conferences International

ANAEROBIC DIGESTION OF AQUEOUS PYROLYSIS CONDENSATE ENHANCED BY BIOCHAR:  A CIRCULAR ECONOMY APPROACH  Neha Batta, ICFAR, Western University, London, Ontario, Canada nbatta@uwo.ca Tahereh Sarchami, ICFAR, Western University, London, Ontario, Canada Cesar M Moreira, Escuela Superior Politécnica del Litoral, ESPOL, Ecuador Lars Rehmann, ICFAR, Western University, London, Ontario, Canada Franco Berruti, ICFAR, Western University, London, Ontario, Canada   Key Words: Anaerobic digestion, Aqueous pyrolysis condensate, Biogas, Biochar, Circular economy  Pyrolysis of biomass leads to the production of bio-oil, non-condensable gas and biochar. Although all products have applications in the value chain, the aqueous phase of the bio-oil is a secondary waste of low value, acidic and with a complex chemical composition. This study focuses on the utilisation of the aqueous phase, termed aqueous pyrolysis condensate (APC) for energy generation via anaerobic digestion in the presence of biochar derived from the digestate to moderate the inhibitory effects of the phenolic components, thereby following the path of circular economy. Isotherm studies of the biochar showed that it had an adsorption capacity of 39.8 mgphenol.g-1biochar. The addition of biochar allowed for an 83% increase in the cumulative biogas production at the highest APC loading, accompanied by an increase in the CH4/CO2 ratio. This shows that the APC can be utilized as a valuable precursor for energy generation.      Figure 1 – Circular economy concept of APC valorization 

Anaerobic digestion of aqueous pyrolysis condensate enhanced by biochar: a circular economy approach

https://dc.engconfintl.org/cgi/viewcontent.cgi?filename=0&article=1004&context=pyroliq_2023&type=additional

Anaerobic digestion of aqueous pyrolysis condensate enhanced by biochar: a circular economy approach

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Engineering Conferences International