New technology for sewage water treatment system is intended to supplement central Berlin
A new technique for the purification of sewage Berlin researchers have now developed. Using bacteria and fine membranes they turn even heavily polluted water back to bathing quality. The so-called membrane bioreactor (MBR), which is currently being tested in the Berlin district of Lichtenberg, due to its compact design, even in remote villages are used.
Sewage
About 33,000 are in Berlin today (yet) connected to the central sewer system. This includes the approximately 250 residents of the settlement amount, Margaret. Because there can flow over the peeling Ling ditch cleaned the water course to Panke, the settlement was selected for the study and a drainage pressure developed locally.
The new membrane bioreactor process, which is first used here works like a traditional sewage treatment plant, only a smaller amount of space. Bacteria are stimulated by the addition or removal of oxygen to almost complete biodegradation of phosphorus and nitrogen compounds. In a specially designed container for this purpose but will be added the forced passage of a thick package of special membranes. Their passage openings are so small that remain even hang pathogens. The water is disinfected and filled it completely, even the new limits of the EU Bathing Water Directive.
Wednesday, 11 July 2012
sewage water treatment: researchers in the footsteps of Nitrospira bacteria
WWTF project for the optimization of treatment systems
In order to optimize the sewage water treatment in the future even more, researchers investigate Holger DAIM by the Department of Microbial Ecology at the University of Vienna in its current WWTF project Nitrospira bacteria.
"These bacteria, which in the removal of nitrogen from sewage water play a significant role, are still largely unexplored, because they can not be grown as pure cultures in the laboratory," said DAIM against press text. Using modern molecular biological means, the researchers will now solve this mystery.
"In addition to waste water are phosphates and other chemical substances and large quantities of nitrogen," explains DAIM. If one were to take these amounts into natural waters, it would lead to the eutrophication of the water. Therefore, the sewage water must be removed by nitrogen. "Nitrite-oxidizing assume an important part of this mission bacteria (NOB) living in sewage sludge," says the researcher. Depending on the system about two to ten percent of all bacteria belonging to the genus Nitrospira in sewage sludge.
In modern sewage treatment plants thousands of different types of bacteria live in a complex community. They play in the degradation of pollutants an important role. Until now, the processes were unclear. "In order to shed light on the matter, we have sequenced a genome of a Nitrospira strain. Now we want to win with fellow researchers at the Department of Molecular Systems Biology in Vienna and the University of Hamburg further information by genomics, transcriptomics, proteomics and metabolomics." The analysis of uncultured bacteria is a particular challenge, because there in the samples taken in addition to other Nitrospira bacteria. "The more we learn about the organisms, the higher is the chance that we can do it at some point, to cultivate them in pure culture. Then additional experiments would be possible that without such cultures still are not feasible," said DAIM.
In order to optimize the sewage water treatment in the future even more, researchers investigate Holger DAIM by the Department of Microbial Ecology at the University of Vienna in its current WWTF project Nitrospira bacteria.
"These bacteria, which in the removal of nitrogen from sewage water play a significant role, are still largely unexplored, because they can not be grown as pure cultures in the laboratory," said DAIM against press text. Using modern molecular biological means, the researchers will now solve this mystery.
"In addition to waste water are phosphates and other chemical substances and large quantities of nitrogen," explains DAIM. If one were to take these amounts into natural waters, it would lead to the eutrophication of the water. Therefore, the sewage water must be removed by nitrogen. "Nitrite-oxidizing assume an important part of this mission bacteria (NOB) living in sewage sludge," says the researcher. Depending on the system about two to ten percent of all bacteria belonging to the genus Nitrospira in sewage sludge.
In modern sewage treatment plants thousands of different types of bacteria live in a complex community. They play in the degradation of pollutants an important role. Until now, the processes were unclear. "In order to shed light on the matter, we have sequenced a genome of a Nitrospira strain. Now we want to win with fellow researchers at the Department of Molecular Systems Biology in Vienna and the University of Hamburg further information by genomics, transcriptomics, proteomics and metabolomics." The analysis of uncultured bacteria is a particular challenge, because there in the samples taken in addition to other Nitrospira bacteria. "The more we learn about the organisms, the higher is the chance that we can do it at some point, to cultivate them in pure culture. Then additional experiments would be possible that without such cultures still are not feasible," said DAIM.
sewage treatment: diamond electron as a promising solution
The project is for the treatment of organically contaminated heavy water. The researchers tested Leoben used for large systems. Is at the Montanuniversität worked hard in the treatment of organically polluted water. For the treatment of highly polluted waste water, the standard procedures are often not sufficient. To minimize heavy organic impurities, diamond electrodes could be used, such as from a current research project the Montanuniversität Leoben apparent. As part of a "FFG-Bridge" project attempts to evaluate the degradation efficiency of diamond electrodes are carried out to test their possible use in chemical-physical waste treatment facilities.
Anodic Oxifdation. The technique using anodic oxidation treatment of sewage is relatively new. The possibilities have been detected only with the development of diamond electrodes in recent years. The anodic oxidation is an electrochemical oxidation method which directly uses the raw water as electrolyte and therefrom oxidant such as Ozone, hydrogen peroxide, chlorine produced. These oxidants attack the organic impurities and build them from water and carbon dioxide. In addition to the degradation of organic matter also provides an excellent disinfecting effect is given.
Anodic Oxifdation. The technique using anodic oxidation treatment of sewage is relatively new. The possibilities have been detected only with the development of diamond electrodes in recent years. The anodic oxidation is an electrochemical oxidation method which directly uses the raw water as electrolyte and therefrom oxidant such as Ozone, hydrogen peroxide, chlorine produced. These oxidants attack the organic impurities and build them from water and carbon dioxide. In addition to the degradation of organic matter also provides an excellent disinfecting effect is given.
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