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We designed a cross-flow bioreactor perfectly adapted to filtering heavy metals out of mining drainage (MD) using genetically engineered <i>Escherichia coli</i>. Bacteria are retained in a reaction chamber while a large volume gets pumped through the chamber. The cells take up the heavy metals leading to an intracellular accumulation. The application was improved by user feedback and modeling and is now easy to run. It can easily be reconstructed by using the building plans we offer in our wiki. Furthermore, our device tackles the difficulty of applying GMOs to extract valuables out of large volumes and enables the safe application of GMOs outside the laboratory.</br> | We designed a cross-flow bioreactor perfectly adapted to filtering heavy metals out of mining drainage (MD) using genetically engineered <i>Escherichia coli</i>. Bacteria are retained in a reaction chamber while a large volume gets pumped through the chamber. The cells take up the heavy metals leading to an intracellular accumulation. The application was improved by user feedback and modeling and is now easy to run. It can easily be reconstructed by using the building plans we offer in our wiki. Furthermore, our device tackles the difficulty of applying GMOs to extract valuables out of large volumes and enables the safe application of GMOs outside the laboratory.</br> | ||
The task of scavenging metal ions from MD poses a great challenge to conventional cultivation strategies. Not only is the MD toxic to cells due to its elevated concentrations of sodium chloride and heavy metal ions like iron and copper. The shear amount of MD which has to be processed poses a problem in its own right. We tackle the toxic effects of heavy metals by our <a href="https://2018.igem.org/Team:Bielefeld-CeBiTec/Toxicity_Theory">approach</a> on anti-oxidants and anti-toxic measures leading to an improved cell viability.</br> | The task of scavenging metal ions from MD poses a great challenge to conventional cultivation strategies. Not only is the MD toxic to cells due to its elevated concentrations of sodium chloride and heavy metal ions like iron and copper. The shear amount of MD which has to be processed poses a problem in its own right. We tackle the toxic effects of heavy metals by our <a href="https://2018.igem.org/Team:Bielefeld-CeBiTec/Toxicity_Theory">approach</a> on anti-oxidants and anti-toxic measures leading to an improved cell viability.</br> | ||
− | To solve the problem of the large MD volume that has to be processed and, after our first assessment indicated that cultivating cells in such a large volume would be difficult and further complicate downstream processing (e.g. filtering of the biomass), we decided to construct a suitable hardware. Therefore, we designed a prototype for a customized cross-flow bioreactor adapted to the task of filtering large quantities of MD. The system comprises two core units: A reaction chamber for containing the cells (“reactor unit”) and a larger reservoir area providing mining drainage (“reservoir unit”) (figure | + | To solve the problem of the large MD volume that has to be processed and, after our first assessment indicated that cultivating cells in such a large volume would be difficult and further complicate downstream processing (e.g. filtering of the biomass), we decided to construct a suitable hardware. Therefore, we designed a prototype for a customized cross-flow bioreactor adapted to the task of filtering large quantities of MD. The system comprises two core units: A reaction chamber for containing the cells (“reactor unit”) and a larger reservoir area providing mining drainage (“reservoir unit”) (figure 5).</article> |
<figure role="group"> | <figure role="group"> | ||
<img class="figure hundred" src="https://static.igem.org/mediawiki/2018/d/db/T--Bielefeld-CeBiTec--jr--Bioreactor.png"> | <img class="figure hundred" src="https://static.igem.org/mediawiki/2018/d/db/T--Bielefeld-CeBiTec--jr--Bioreactor.png"> |
Revision as of 02:52, 18 October 2018
Hardware
Short Summary
Printing Electronics
Silver has the highest conductivity and does not oxidize making it a popular choice for flexible electronics. Gold on the other hand is very expensive but has the advantage of not reacting with biological systems.
Design of a Cross-flow Bioreactor
Raut, N. C., & Al-Shamery, K. (2018). Inkjet printing metals on flexible materials for plastic and paper electronics. Journal of Materials Chemistry C, 6(7), 1618-1641.