A new method for treating the smell of rotten eggs emitted by sewage plants, developed in conjunction by a researcher at the Universitat Autònoma de Barcelona’s Engineering School (ETSE) and a researcher from the University of California, could lead to worldwide savings of two million euros a year. The researchers have discovered a simple method for transforming the chemical odour filters currently installed in treatment plants into equally efficient, but cheaper and less toxic, biological filters.
Blocks of polyurethane foam with the bacterial covering that substitutes chemical filters in the treatment of smells
The Californian plant where the biological method was tested successfully. The tower on the left uses chemical filters, while the one on the right has been fitted with a biological filter
The treatment of sewage causes unpleasant smells due to emissions of such gasses as hydrogen sulfide (H2S), along with other compounds such as sulfur compounds, amines and carboxylic acids. Of all these gasses, the most noticeable is hydrogen sulfide, with its strong smell of rotten eggs. Therefore, sewage treatment plants include chemical filters for the control of such bad smells. These filters are fast absorbers and degraders of the whole volume of hydrogen sulfide generated, but there are major disadvantages: they are expensive, and generate and use toxic products. The alternative to using chemical filters is the use of biological filters, based on the biodegradation of hydrogen sulfide using bacteria. Until now, such filters were too voluminous to be used in plants treating large amounts of gasses.
The lecturer from the UAB’s High Engineering School (ETSE), David Gabriel, along with Marc A. Deshusses, lecturer at the University of California (USA), have developed an alterative that can transform the chemical filters used until now into biological filters that are just as fast and effective as the former. Via a cheap and simple conversion process, the new biological filters degrade the hydrogen sulfide in a record time: with some 2 seconds of contact between the gas and the filter. The invention has already been tested in Californian sewage plants (USA).
Octavi López Coronado | alfa
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Friction stir welding is a still-young and thus often unfamiliar pressure welding process for joining flat components and semi-finished components made of light metals.
Scientists at the University of Stuttgart have now developed two new process variants that will considerably expand the areas of application for friction stir welding.
Technologie-Lizenz-Büro (TLB) GmbH supports the University of Stuttgart in patenting and marketing its innovations.
Friction stir welding is a still-young and thus often unfamiliar pressure welding process for joining flat components and semi-finished components made of...
Optical quantum computers can revolutionize computer technology. A team of researchers led by scientists from Münster University and KIT now succeeded in putting a quantum optical experimental set-up onto a chip. In doing so, they have met one of the requirements for making it possible to use photonic circuits for optical quantum computers.
Optical quantum computers are what people are pinning their hopes on for tomorrow’s computer technology – whether for tap-proof data encryption, ultrafast...
The Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP has been developing various applications for OLED microdisplays based on organic semiconductors. By integrating the capabilities of an image sensor directly into the microdisplay, eye movements can be recorded by the smart glasses and utilized for guidance and control functions, as one example. The new design will be debuted at Augmented World Expo Europe (AWE) in Berlin at Booth B25, October 18th – 19th.
“Augmented-reality” and “wearables” have become terms we encounter almost daily. Both can make daily life a little simpler and provide valuable assistance for...
With the help of artificial intelligence, chemists from the University of Basel in Switzerland have computed the characteristics of about two million crystals made up of four chemical elements. The researchers were able to identify 90 previously unknown thermodynamically stable crystals that can be regarded as new materials. They report on their findings in the scientific journal Physical Review Letters.
Elpasolite is a glassy, transparent, shiny and soft mineral with a cubic crystal structure. First discovered in El Paso County (Colorado, USA), it can also be...
For the first time, Fraunhofer IKTS shows additively manufactured hardmetal tools at WorldPM 2016 in Hamburg. Mechanical, chemical as well as a high heat resistance and extreme hardness are required from tools that are used in mechanical and automotive engineering or in plastics and building materials industry. Researchers at the Fraunhofer Institute for Ceramic Technologies and Systems IKTS in Dresden managed the production of complex hardmetal tools via 3D printing in a quality that are in no way inferior to conventionally produced high-performance tools.
Fraunhofer IKTS counts decades of proven expertise in the development of hardmetals. To date, reliable cutting, drilling, pressing and stamping tools made of...
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29.09.2016 | Event News
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30.09.2016 | Event News
30.09.2016 | Physics and Astronomy