Best Ideas 2021 features all the nominated entries submitted under ‘Submit your Idea’ category. All the entries consist of innovative solutions or propositions for an enterprise that champions the Sustainable Development Goals. They can be on the conceptual, planning, or start-up stage.

Self-sufficiency project: Developing a water treatment project using Geobacter bacteria

Published on August 12, 2021 um 18:07

Explain your idea in details:

After much research, they discovered the impressive properties of these bacteria, which is their ability to produce electricity from the multiplication of organic substances in the water, so we decided to exploit these properties to generate electricity by treating sewage water. The problem lies in our need for acetate and the lack of desire for carbon dioxide, so we searched for all possible ways to solve this problem, and we found that there are genetically modified bacteria that take carbon dioxide and produce acetate in greater quantities while there is light than darkness and this makes this solution integrated only processing Tools and installation, then generate electricity and treat water permanently without the need for permanent intervention

Expected impact of your idea on sustainable development

Certainly, these results are just an expectation, because providing these purposes was not easy for us at this age, so according to expectations, if it is used in a wastewater treatment company, it will provide it with the electricity needed for water treatment, and this is according to the companies implementing the project and the previously published research, but for our development of this solution it is no longer needs to add acetate at all, and he will get rid of carbon dioxide, thus reducing costs and preserving the environment and provide electricity and good water and protect our health

Plans for implementation and sustainability

of an anode, a cathode, a proton or cation exchange membrane, and an electrical circuit. In the left compartment, anode-respiring bacteria (like Geobacter) attach themselves to the anode, forming a sticky residue, or biofilm. In the course of their metabolic activity, these bacteria strip electrons from organic waste. The electrons then flow through a circuit to the cathode, producing electricity in the process, in addition to CO2 and water. Hydroxide, or OH-ions, are transported from the cathode into the surrounding electrolyte. In an experimental set-up lacking organic waste, an electron donor - typically acetate - is supplied in the growth medium as a nutrient source for the anode-respiring bacteria We will but a specific bacteria that will convert the co2 (the product ) to acetate the bacteria is Acetogenic bacteria use cellular redox energy to convert CO2 to acetate using the WoodLjungdahl (WL) pathway. Such redox energy can be derived from electrons generated from H2 as well as from inorganic materials, such as photoresponsive semiconductors. We have developed a nanoparticle-microbe hybrid system in which chemically synthesized cadmium sulfide nanoparticles (CdS-NPs) are displayed on the cell surface of the industrial acetogen Clostridium autoethanogenum. The hybrid system converts CO2 into acetate without the need for additional energy sources, such as H2, and uses only light-induced electrons from CdS-NPs. To elucidate the underlying mechanism by which C. autoethanogenum uses electrons generated from external energy sources to reduce CO2, we performed a transcriptional analysis. Our results indicate that genes encoding the metal ion or flavin-binding proteins were highly up-regulated under CDS-driven autotrophic conditions along with the activation of genes associated with the WL pathway and energy conservation system. Furthermore, the addition of these cofactors increased the CO2 fixation rate under light-exposure conditions. References Simultaneous wastewater treatment and energy harvesting in microbial fuel cells:

Your profile

I am Arwa, I am 16 years old. I love STEM subjects. My parents always motivate me to invent because they find me creative and I always like to help people, organize and

Stage of Idea

conceptual stage, planning stage

Picture upload

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