Tag Archives: Wastewater Treatment

Nitrification in activated sludge ? microbiological insight into nitrogen oxidation process

Nitrification in activated sludge ? microbiological insight into nitrogen oxidation process Aleksandra ZIEMBIŃSKA - Silesian University of Technology - Faculty of Energy and Environmental Engineering (Department of Environmental Biotechnology); Gliwice Please cited as: CHEMIK 2011, 65, 3, 192-199 Activated sludge is known to be one of the most effective and popular methods of wastewater treatment. A wide range of complex biochemical and chemical processes are performed in this biocenosis, which result in obtaining a highly purified product. Nitrification, the removal of inorganic nitrogen compounds, is a crucial wastewater treatment process. Knowledge and the development of molecular biology techniques help in research performed on complex mixtures of microorganisms at the level of their nucleic acids and reveal the vast diversity of nitrifiers and other bacterial groups. The aim of this article is to provide a brief description of modern molecular methods that are useful in research into the biodiversity of nitrifiers in activated sludge and the nitrification monitoring. It was also a goal of the article to underline that biology and chemistry are closely linked mainly...
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The phenomenon of singlet oxygen

The phenomenon of singlet oxygen KRUKIEWICZ K. Please cite as: CHEMIK 2011, 65, 11, 1190-1192 Singlet oxygen has been the subject of intensive research for almost 80 years. Its unusual properties, like high reactivity and oxidizing properties, make it a versatile chemical reagent. Photogeneration is considered as the most effective method of singlet oxygen formation, though it needs to be conducted in situ due to the short lifetime of that form of oxygen. Singlet oxygen has been already applied in the area of medicine and wastewater treatment. Key words: singlet oxygen, photogeneration, photosensitizer, wastewater treatment Read more: pdf-icon...
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One more function for microbial fuel cells in treating wastewater: producing high-quality water

One more function for microbial fuel cells in treating wastewater: producing high-quality water.

ZHEN HE ? Department of Civil Engineering and Mechanics, University of Wisconsin-Milwaukee, USA Please cite as: CHEMIK 2012, 66, 01, 3-10 Abstract: A sustainable wastewater treatment technology should effectively reduce contaminant concentration, recovery energy contents and minimize liquid discharge. A potential candidate for such a technology is a microbial fuel cell (MFC) that can produce bioelectricity directly from wastewater treatment. However, the treated effluent from MFCs is not reused because of unsatisfied water quality. To produce high-quality water using MFCs, we proposed and studied two approaches with integrated membrane technologies. Especially, the osmotic MFCs that take advantage of both forward osmosis and MFCs have been proven feasible with bench-scale studies. The new function of producing high-quality water, although still very challengeable, will make MFCs a promising approach for sustainable wastewater treatment. Keywords: Microbial Fuel Cells, Bioenergy, Forward Osmosis, Membrane, Wastewater Treatment Read more: pdf-icon...
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