Center for Biofilm Engineering Fall 2017 Seminar Series Presents a Seminar with Dr. Leon van Paassen
- Thursday, September 21, 2017 from 4:10pm to 5:00pm
- Roberts Hall, 113 - view map
Dr. Leon van Paassen is an associate professor in the School of Sustainable Engineering and the Built Environment at Arizona State University in Tempe, and a senior investigator at the NSF Research Centre for Bio-mediated and Bio-inspired Geotechnics. At this week's seminar, Dr. van Paassen will be presenting “Advances in bio-based geotechnical engineering.” His research aims to develop sustainable solutions for improved resource efficiency in the civil and mining engineering industry. He strives to reduce environmental impact from these industries through integration of environmental biotechnology and geotechnical engineering.
Biochemical conversions can be used to improve the physical properties and sustainability performance of materials and processes used in constructions and subsurface applications. For example, biologically induced mineral precipitation has been demonstrated to increase the strength and stiffness of porous materials, which enables to mitigate liquefaction and erosion or improve bearing capacity of foundations and stability of slopes and excavations in granular soils. At the same time, these minerals can be used to fill up pores and fractures and create (reactive) hydrological barriers to control migration of contaminants, prevent leakage during CO2 sequestration or improve the durability of ageing construction materials. Although many recent developments involve microbially induced precipitation of calcium carbonate, other biominerals, as well as biofilms and biologically produced gas, can be used to alter material behaviour in engineering applications. This presentation provides an overview on recent advances, including experimental studies at various scales, using either specific micro-organisms or enrichment of indigenous microbial communities, theoretical and numerical studies aimed to improve fundamental insight on the biogeochemical conversions and coupled to the hydro-mechanical properties. Besides the scientific and technological advances, also market potential, sustainability performance and other factors, which determine the successful implementation of these new bio-based technologies are discussed.
If you would like to meet with Dr. van Paassen, please contact Robin Gerlach at firstname.lastname@example.org