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http://dx.doi.org/10.5322/JESI.2021.30.2.161

Impact of Environmental Factors on Phosphorus Removal of Bacillus licheniformis Isolated from Domestic Sewage  

Han, Seok-Soon (Department of Environmental and Biological Chemistry, Chungbuk National University)
Park, Sang-Wook (Department of Environmental and Biological Chemistry, Chungbuk National University)
Kim, Deok-Won (Department of Environmental and Biological Chemistry, Chungbuk National University)
Park, Ji-Su (Field Quality Control Gimcheon part, Doosan Corporation Electro-Materials)
Oh, Eun-Ji (Water and Land Research Group/Division for Natural Environment, Korea Environment Institute)
Yoo, Jin (Indoor Environment Division, Incheon Metropolitan City Institute of Public Health and Environment)
Kim, Deok-Hyeon (National Institute of Environmental Research)
Chung, Keun-Yook (Department of Environmental and Biological Chemistry, Chungbuk National University)
Publication Information
Journal of Environmental Science International / v.30, no.2, 2021 , pp. 161-172 More about this Journal
Abstract
This study was initiated to isolate the microorganisms removing phosphorus (P) from domestic sewage and to investigate the effects of environmental factors on the growth and P removal of the isolated bacteria. Microorganisms isolated from the sewage were identified as Chryseobacterium sp., Stenotrophomonas maltophilia, and Bacillus licheniformis. Among them, Bacillus licheniformis was selected as the P removal microorganism. The environmental factors considered in this study included initial phosphorus concentration, temperature, pH, and carbon source. At initial P concentrations of 10, 20, and 30 mg/L, the P removal efficiencies were 100.0%, 84.0%, and 16.5%, respectively. At 20℃, 30℃, and 40℃, the P removal efficiencies were 0%, 75.8%, and 60.6%, respectively. The removal efficiencies of phosphorus according to pH were 1.6%, 91.7%, and 51.1% at pH 5, pH 7, and pH 9, respectively. Using glucose, acetate, and glucose + acetate as carbon sources yielded P removal efficiencies of 80.9%, 33.6%, and 54.1%, respectively. Therefore, the results from the study demonstrated that the P removal efficiencies of Bacillus licheniformis were the highest when the initial P concentration, temperature, pH, and carbon source were 10 mg/L, 30℃, 7, and glucose, respectively.
Keywords
Bacillus licheniformis; Isolation; Phosphorus removal efficiency; Environmental factor; optimal conditions;
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