Effects of the combination of aeration and biofilm technology on transformation of nitrogen in black-odor river
- 30 May 2016
- journal article
- research article
- Published by IWA Publishing in Water Science & Technology
- Vol. 74 (3), 655-662
- https://doi.org/10.2166/wst.2016.212
Abstract
Excess nitrogen in urban river networks leading to eutrophication has become one of the most urgent environmental problems. Combinations of different aeration and biofilm techniques was designed to remove nitrogen from rivers. In laboratory water tank simulation experiments, we assessed the removal efficiency of nitrogen in both the overlying water and sediments by using the combination of the aeration and biofilm techniques, and then analyzed the transformation of nitrogen during the experiments. Aeration (especially sediment aeration) combined with the biofilms techniques was proved efficient in removing nitrogen from polluted rivers. Results indicated that the combination of sediment aeration and biofilms, with the highest nitrogen removal rate from the overlying water and sediments, was the most effective combined process, which especially inhibited the potential release of nitrogen from sediments by reducing the enzyme activity. It was found that the content of dissolved oxygen in water could be restored on the basis of the application of aeration techniques ahead, and the biofilm technique would be effective in purifying water in black-odor rivers.Keywords
This publication has 20 references indexed in Scilit:
- Carbon Fiber as an Excellent Support Material for Wastewater Treatment BiofilmsEnvironmental Science & Technology, 2012
- Measuring and modeling the oxygen profile in a nitrifying Moving Bed Biofilm ReactorMathematical Biosciences, 2010
- Influence of hydrological connectivity of riverine wetlands on nitrogen removal via denitrificationBiogeochemistry, 2010
- Microbial enzyme activity, nutrient uptake and nutrient limitation in forested streamsFreshwater Biology, 2010
- Impact of Point-Source Pollution on Phosphorus and Nitrogen Cycling in Stream-Bed SedimentsEnvironmental Science & Technology, 2010
- The EPS Matrix: The “House of Biofilm Cells”Journal of Bacteriology, 2007
- Biophysicochemical process coupling controls nitrogen use by benthic biofilmsLimnology and Oceanography, 2007
- Sediment microbial enzyme activity as an indicator of nutrient limitation in Great Lakes coastal wetlandsFreshwater Biology, 2006
- Modeling nitrogen dynamics in intensive shrimp ponds: the role of sediment remineralizationAquaculture, 2004
- Nitrifying and heterotrophic population dynamics in biofilm reactors: effects of hydraulic retention time and the presence of organic carbonWater Research, 2002