Engineers use electricity to clean up toxic water

Posted by aclimaadmin | julio 15, 2020 | Noticias del Sector

Powerful electrochemical process destroys water contaminants

A team of engineers may be one step closer to cleaning up heavily contaminated industrial wastewater streams.

Researchers from the School of Chemical and Biomolecular Engineering developed an electrochemical oxidation process with the aim of cleaning up complex wastewater that contained a toxic cocktail of chemical pollutants.

“Our study, published in Algal Research, involved industrial wastewater that had been heavily contaminated with a cocktail of organic and inorganic species during a biofuel production process,» said Julia Ciarlini Jungers Soares, who is completing a PhD in Chemical and Biomolecular Engineering under the supervision of Dr Alejandro Montoya.

The wastewater, which contained carbon, nitrogen and phosphorus, was generated in a pilot plant, designed by the team for the production of biofuels using naturally abundant microalgae.

The process involved treating wastewater with electricity using specialized electrodes. They discharged electricity, then drove oxidation reactions near the electrode surfaces, transforming the organic contaminants into harmless gasses, ions or minerals.

“We have employed an incredibly powerful process that eliminates even the most persistent non-biodegradable pollutants, such as pharmaceuticals and pesticides, as well as various classes of organic compounds that can be found in many industrial effluents,” she said.

“The process is relatively simple, does not require the addition of chemicals or severe operation conditions, and does not produce additional waste streams.”

“Wastewater is a significant issue for our environment, as well as for many industries who use substantial volumes of water in their processes, such as in reactions, transport, and washing and cooling. Finding suitable solutions for reuse or disposal is often very challenging and costly.

“The electrochemical method that we used can be readily applied to industries that must comply with strict regulations for wastewater disposal, such as pulp and paper processing, wineries, as well as pharmaceutical production facilities.

“Worldwide, researchers are investigating methods for the development of biofuels from algae. Developing alternatives for the treatment and reuse of this industrial effluent is a hot research topic and can bring opportunities for energy and resource recovery within a circular bio-economy framework.”

The team will soon carry out research focused on specific contaminants to better understand the chemical transformations that take place during electrochemical oxidation and will upscale the process.

A 2017 UNESCO report found that the opportunities from exploiting wastewater as a resource were vast, and that safely managed wastewater is an affordable and sustainable source of water, energy, nutrients and other recoverable materials.

Fuente: www.watertechonline.com

Add a comment

*Please complete all fields correctly

Posts Relaccionados

Posted by aclimaadmin | 15 octubre 2021
Con el transporte mundial en una encrucijada, los líderes gubernamentales, los expertos de sector industrial y los grupos de la sociedad civil se reúnen en Pekín en una conferencia de...
Posted by aclimaadmin | 14 octubre 2021
As nations and key businesses learn to cope with the Covid pandemic, recyclers around the world continue to be severely affected by logistical challenges and problems with supply chains. That...
Posted by aclimaadmin | 14 octubre 2021
La planta, ubicada en Cubillos del Sil, satisfará la demanda de reciclaje tanto en España como en Portugal, con una capacidad de tratamiento anual de 8.000 toneladas de baterías eléctricas....
X