期刊
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
卷 85, 期 -, 页码 511-516出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ibiod.2013.05.025
关键词
Chlorella sorokiniana; Growth rate; Heterotrophic microalgae; Nitrogen and phosphorus removal; N/P ratio
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF)
- Ministry of Education, Science and Technology [2011-0023132, 2012R1A6A3A01016543]
- National Research Foundation of Korea [2012R1A6A3A01016543, 2011-0023132] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The growth rate of biomass and removal characteristics of nitrogen and phosphorus were examined using nitrate and ammonia as nitrogen sources for batch cultures of the heterotrophic microalgae, Chlorella sorokiniana. The initial nitrogen concentrations examined were 10, 20, 40, 80 and 160 mg-N l(-1). The results show that a nitrate concentration of 80 mg-N l(-1) as a nitrogen source provided the maximum growth rate and greatest removal of nitrogen and phosphorus, while the growth rate decreased with decreasing ammonia concentration. The maximum growth rate and removal amounts of nitrate and phosphorus were 0.48 d(-1), 32.6 mg-N and 5.9 mg-P, respectively, with 80 mg NO3-N l(-1). With ammonia as a nitrogen source, the maximum growth rate and removal amounts of nitrogen and phosphorus were 0.6 d(-1), 79.2 mg-N and 5.9 mg-P, respectively, with 160 mg NH3-N l(-1). When ammonia was used as a nitrogen source, removal rates of nitrogen and phosphorus were higher than those with nitrate. However, the pH decrease caused by ammonia affected the growth of Chlorella sorokiniana, resulting in a lower yield of biomass than when using nitrate as a nitrogen source. (C) 2013 Elsevier Ltd. All rights reserved.
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