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
Quick, Precise, but not Cold
17.05.2017 | Fraunhofer-Institut für Lasertechnik ILT
A laser for divers
03.05.2017 | Laser Zentrum Hannover e.V.
Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.
Staphylococcus aureus (S. aureus) is a bacterium that colonizes by far more than half of the skin and the mucosa of adults, usually without causing infections....
Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.
The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....
An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.
We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...
Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.
Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...
An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...
24.05.2017 | Event News
23.05.2017 | Event News
22.05.2017 | Event News
26.05.2017 | Life Sciences
26.05.2017 | Life Sciences
26.05.2017 | Physics and Astronomy