Based on previous research, there is a good platform for simultaneously developing both microbial capacity in biogas reactors and strengthening process stability. Important components in this work comprise understanding and controlling the importance of trace element additions as well as rheology/viscosity in relation to substrate composition and process parameters.
The intention of this project is to further develop knowledge on the role of trace elements in the streamlining of biogas production as such and their role for the microorganisms’ production of organic substances, which in turn affect the rheology of reactor fluid.
In order to attain this, the project will conduct a series of lab-scale reactors with substrates relevant for the industry and optimize process conditions with regard to changes in substrate mixes, organic loading, trace element additions, stirring capacity, etc. These reactors will be operated in close collaboration with project partners and with the help of customary analyses like biogas and methane formation per added amount of organic material, fermentation efficiency, pH, alkalinity, degree of digestion, etc. Rheological characterization, determination of trace element availability, molecular biological characterization of microbiology society are determined in connection with changes in substrate mixer, loading and stirring variations, addition of trace element, etc.
The results will provide supporting material in which we integrate the opportunities for greater loading and replacement in tested processes as well as guidelines for further research studies within the area ahead of the next BRC phase. This means that the practical terms and conditions for, for example, dosage of trace elements, dimensioning of stirring, pumping and dewatering in the long run provide a safer base with lower risk of surprises in the form of process disruptions.
Participants: Project leader Associate Professor Annika Björn and Professor Bo Svensson, PhD Student Sepehr Shakeri Yekta and Research Assistant Pascal Ojong, from the Division Environmental Change, the Department of Thematic Studies. Researchers from the Division of Environmental Technology and Management, the Department of Management and Engineering, IEI, and the Division of Biotechnology, the Dapartment ocg Physics, Chemistry and Biology, IFM. Partners from Kemira OYJ, NSR AB, Scandinavian Biogas Fuels AB and Tekniska Verken i Linköping AB.