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DOI : 10.17640/KSWST.2020.28.6.21 ,    Vol.28, No.6, 21 ~ 31, 2020
Title
Effect of Water Temperature and Salinity on Enrichment of Anaerobic Ammonium Denitrifying Bacteria
이창주 Chang-ju Lee , 김영희 Younghee Kim
Abstract
The ANAMMOX process using anaerobic ammonium denitrifying bacteria has recently attracted much attention as a technology to remove nitrogen from sewage and wastewater, because of its effectiveness, lower energy consumption and absence of need for carbon sources. However, due to not only the slow growth rate of microorganisms but also various environmental factors that inhibit their growth, the development of such technologies in Korea is slow. In this study, the effect of temperature, COD, and salinity on the growth of microorganisms was investigated in cultivation of anaerobic ammonium denitrifying bacteria (ANAMMOX), using livestock wastewater sludge. After the separation of ANAMMOX bacteria from livestock wastewater sludge for 80 days, it was found that COD concentration higher than 100 mg/L in the medium negatively affects the growth of microorganisms. In experiments with isolated ANAMMOX bacteria, higher temperature resulted in faster growth of microorganisms. The Nitrogen Removal Rate (NRR) was greater than 1.0 kg/m3/d after 15 days, and the maximum NRR value observed during the experiment was 1.38 kg/m3/d. The effect of salinity was tested at the maximum salt concentration of 3000 mg/L. As the salt concentration increased, the NRR recovery period tended to be prolonged, but the NRR continued to increase, thus securing positive data on salt resistance. Further evaluation of salt resistance at higher salt concentrations should be considered to apply ANAMMOX for wastewater of high concentration salt like foodwaste leachate.
Key Words
ANAMMOX process, Nitrogen removal, Nitrification, Wastewater treatment, 아나목스공정, 질소제거, 아질산화, 하수처리
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