Bacteria on nanofiber electrodes will purify wastewater. Free Technical Library News

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Bacteria on nanofiber electrodes could purify wastewater

15.07.2017

Scientists from Cornell University have developed an innovative competitive material for wastewater treatment of contaminants. The new development is based on carbon nanoelectrodes with a conductive coating of 3,4-ethylenedioxythiophene.

The electrodes were electrospun from carbon nanofibers and coated with an electrically conductive polymer called PEDOT. After this coating is applied to the electrode, a layer of electrically active Geobacter sulfurreducens bacteria begins to grow on it, which produce an electric current and transfer electrons to the next electrode.

Bacteria feed on pollution from sewage and produce electricity, and the conductive nanofiber creates a favorable environment for them.

The new material will be able to significantly reduce the cost of producing electrodes and thereby make the water treatment process more accessible.

In the future, bacteria sitting on electrodes will be able to capture contaminants directly from the water flowing past them and recycle them. This technology will allow wastewater treatment plants to take up less space and increase productivity.

Scientists have created a carbon nanofiber using electrospin and carbonization. The nanofiber becomes visible to the eye after a few hours of electrospin.

Carbon nanofiber was used in the development because it has high porosity and is biologically compatible with bacteria. The addition of PEDOT improved the efficiency of the electrode.

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The robot will find and neutralize a traitor colleague 29.06.2023

Researchers at the University of Lausanne have developed a groundbreaking algorithm that can disable robotic actions that could disrupt a team's functioning.

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Colleague robots perform a variety of tasks, including rescue and construction, by working together. However, some robots can go over to the side of opponents and oppose other members of the group. These situations can lead to a disruption in the effectiveness of the entire team.

An algorithm developed by scientists proposes a voting mechanism that allows collaborating robots to identify and isolate Byzantine robots. This ensures that the team's work remains consistent and prevents the negative influence of traitorous elements.

The researchers are confident in the effectiveness of the algorithm and its ability to neutralize Byzantine robots in various scenarios. In addition, the tests carried out confirmed that the algorithm is resistant to possible errors and random changes in the behavior of conventional robots, which makes it a reliable tool for ensuring the safety and efficiency of the work of fellow robots.

The term "Byzantine robot" comes from the "Byzantine generals problem", which was first introduced in 1982 in an article by Leslie Lamport. This problem arises in distributed systems, where participants, in this case robots, must reach agreement in making decisions, despite possible failures or attacks from some participants.

In the context of robotics, Byzantine robot refers to a robot that deliberately or accidentally misinforms or acts incorrectly within a distributed robotic system. This may include passing on incorrect information, performing incorrect actions, or even actively interfering with the work of other robots on the team. The Byzantine robot is an element that violates the integrity and reliability of the system, creating potential problems and risks for the team of accomplice robots.

The development of algorithms and mechanisms capable of detecting and neutralizing Byzantine robots is an important task in the field of robotics and security of distributed robotic systems.

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