Performance and Microbial Structure of a Combined Biofilm Reactor |
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Authors: | Haiyan Guo Jiti Zhou Wang Jing Xiuhong Zhang Zhiyong Zhang M Salah Uddin |
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Institution: | (1) Department of Environmental Science and Technology, Dalian University of Technology, 116023 Dalian, China |
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Abstract: | A novel combined biofilm reactor was established and applied as a single treatment unit for carbon and nitrogen removal of
wastewater. The nitrogen removal performance of the reactor at different levels of organic carbon (COD) loading was investigated
when the influent total nitrogen (TN) loading was 0.74 g TN/m2 day. Continuous experimental results demonstrated that 80% nitrogen was eliminated when the influent COD loading ranged between
2.06 g and 3.92 g COD/m2 day. Microbial composition in the reactor was analyzed using fluorescent in situ hybridization (FISH) and conventional batch
tests. The relative abundance of ammonia-oxidizing bacteria in the aerobic zone of the reactor measured by FISH was consistent
with the result from conventional batch tests. |
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Keywords: | Combined biofilm reactor Wastewater treatment Nitrification Denitrification |
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