BacillaFilla is a genetically engineered strain of the bacterium Bacillus subtilis which was developed by a group of students at Newcastle University in order to repair cracks in concrete.
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History
The bacterial strain was engineered by a team of students from Newcastle University in 2010 as part of an International Genetically Engineered Machine competition.
Description
The bacteria would be released as spores which would germinate upon coming into contact with the pH of concrete. Upon germination, the bacteria would descend into cracks in the concrete. The bacteria use quorum sensing to determine when enough bacteria have accumulated, triggering production of a mixture of calcium carbonate and a "bacterial glue", which combines with the bacterial cells to fill the crack. This mixture hardens to be as strong as the surrounding concrete.
Environmental impact
Prolonging the life of concrete could reduce CO2 emissions derived from concrete production.