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Kamei T
Kamei T
Japan
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Research Article
Evaluation of Performance and Microbial Community of NH4-N and NO3-N Bioreactors
Author(s): Khanitchaidecha W, Koshy P, Kamei T, Nakaruk A and Kazama FKhanitchaidecha W, Koshy P, Kamei T, Nakaruk A and Kazama F
Nitrogen contamination of groundwater has become an increasingly serious issue affecting the quality of drinking water. An energy efficient and low cost drinking water treatment method involving two attached growth bioreactors were developed for both NH4-N removal and NO3-N removal. Continuous flow of the groundwater through the NH4-N bioreactor resulted in the removal of NH4-N by nitrification without any aeration. The efficiency of NH4-N removal was determined to be 70% in the laboratory and 95% in on-site trials. The higher efficiency of the on-site bioreactor resulted from the presence of various groups of local microorganisms (8 groups and 3 classes) which were cultivated from the on-site groundwater. The NO3-N bioreactor was capable of removing NO3-N from the groundwater efficiently by hydrogenotrophic denitrification at low H2 supply rates. A high NO3-N removal efficiency of 98.. View More»
DOI: 10.4172/1948-5948.S12-007