The wastewater treatment plants could soon become true energy producers thanks to bacteria. And we're talking about renewable energy!
So what could happen in a hopeful near future?
A team of Norwegian researchers has created a fuel cell powered by the natural processes of microorganisms that would allow not only the purification of wastewater but also the generation of small amounts of energy. Taking the wastewater from civil or industrial discharges and deriving energy as well as cleaner water seems to be, relatively, simple: “Some bacteria, when subjected to electric current, would generate hydrogen while absorbing and retaining the carbon present in the treated sewage. The hydrogen would be used to produce electricity.” Naturally, the process described here is simplified, but the idea seems truly feasible.
According to an article published in the Frontiers in Energy Research, the large-scale application of the process briefly described above would lead to a significant reduction in carbon emissions from wastewater treatment, which is one of the main problems related to liquid waste management.
iMETland is a European research project near Seville, Spain, that uses bacteria to purify the city's water while simultaneously producing the energy needed for its operation.
“iMETland is an eco-friendly device which purifies urban wastewater from small communities at zero-energy operation cost, creating a virtuous circle safeguarding local environment and connecting water, energy, ICT and land resources”
Americans are not far behind with the project BioVolt. This is a macrobiotic fuel cell that “in just one day can purify 2250 liters of wastewater… in addition to producing electricity.”
In traditional treatment plants, the organic material present in wastewater represents a significant waste that must undergo chemical treatment before being sent to landfill, resulting in a considerable expenditure of energy. Well, the macrobiotic fuel cell would be able to “metabolize contaminants while simultaneously producing electricity.”
“The goal of the researchers is for microbial fuel cells to become widespread and easy to install devices, just like photovoltaic systems are today.”
Let’s not forget that in Italy, it is already possible to do a lot. Thanks to companies, professionals, and specialized consultants, it is possible to equip oneself with purification systems aimed not only at properly disposing of wastewater according to current regulations and with a low economic and environmental impact but also at transforming it into a true resource, thereby generating significant economic value.
Contact Dora Baltea for an in-depth analysis of your specific needs and for the development of a tailored solution for your case.
