A single-chambered microbial fuel cell protrotype developed by researchers at Pennsylvania State University may have proven that someone's trash could indeed become another person's treasure. During their research, the scientists found that when a steady flow of wastewater was pumped into the chamber to feed the bacteria, bacterial digestion of the wastewater's organic matter unleashed electrons into the electrical circuit and positively charged hydrogen ions into the solution. As a result, the ions reduced the solution's oxygen demand, which is a key goal of wastewater management. Such findings suggest that microbial fuel cell technology may provide a new method to save operating costs of wastewater treatment.
Producing high-quality end-production metal parts with additive manufacturing for applications like aerospace and medical requires very tightly controlled processes and materials. New standards and guidelines for machines and processes, materials, and printed parts are underway from bodies such as ASTM International.
Engineers at the University of San Diego’s Jacobs School of Engineering have designed biobatteries on commercial tattoo paper, with an anode and cathode screen-printed on and modified to harvest energy from lactate in a person’s sweat.
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