Summer holidays, like the traditional Fourth of July, may be observed in different ways by diverse communities, but many people enjoy a refreshing visit to the beach. Some build sand castles. Now, there may be something more permanent. Architect Magnus Larsson proposes combining sand with bacterium Sporosarcina pasteurii (formerly known as Bacillus pasteurii); the process can produce biological cementation. You can build with it. Larsson wants to build a biologically-grown structure in the Sahara, perhaps in combination with the Great Green Wall of the Sahel. The architecture would support plantings, maybe even people, and won recognition from the LafargeHolcim Foundation for Sustainable Construction.
Globally, 1/3 of all arable earth is dry, and vulnerable to drought and eventually turning to sand. The Gobi desert of China and the Sahara of Africa are especially threatened, but deserts like the Mojave in North America seek sustainable solutions. “One billion grains of sand come into being – each second,” states Larsson. Innovations related to deserts and desertification, like Jason DeJong‘s findings and Larsson’s sandstone walls and habitats, or the Great Green Walls of the Sahara and Gobi, may help to rebuild the world.
DeJong, Jason. “Geo-Technical Engineering and Innovation.” Geo-Institute of ASCE and University of California, Davis. https://youtu.be/Jvm-D9INVWs
Larsson, Magnus. “Turning dunes into architecture.” TEDGlobal 2009. https://www.ted.com/talks/magnus_larsson_turning_dunes_into_architecture/.
LafargeHolcim. Headquartered in Switzerland, the company employs more than 70,000 people in the development of cement, aggregates, and innovation in building materials. https:/www.lafargeholcim-foundation.org.
Swayamdipta Bhaduri, Nandini Debnath, Sushanta Mitra, Yang Liu, Aloke Kumar. “Miocrobiologically Induced Precipitation Mediated by Sporosarcina pasteurii,” Journal of Visualized Experiments. 2016; (110) 53253. doi: 10.3791/53253/. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4941918/
Building the World Blog by Kathleen Lusk Brooke and Zoe G. Quinn is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unp