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| Optimizing the Conditions in Removal of Nitrogen and Phosphorus by Spirulinap latensis |
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| KeyWord:Spirulinap latensis; removal of nitrogen and phosphorus; wastewater treatment |
| Author Name | Affiliation | | PENG Fang | Department of Environmental Science and Engineering, Xiangtan University | | TANG Fei | Department of Environmental Science and Engineering, Xiangtan University | | LIANG Zhi-jie | Department of Environmental Science and Engineering, Xiangtan University | | SU Xiao-ling | Department of Environmental Science and Engineering, Xiangtan University | | GE Fei | Department of Environmental Science and Engineering, Xiangtan University |
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| Abstract: |
| This paper investigated the optimization of conditions in removal of nitrogen and phosphorus by a filamentous blue alga Spirulinap latensis, which included algae density, initial concentrations of NH+4-N and total phosphorus（TP），ratio of nitrogen to phosphorus（N/P ratio）, starvation treatment and inorganic carbon. The results showed that under experimental conditions, the removal efficiency of NH+4-N and TP increased with the enhancement of initial algae density. 90% NH+4-N and TP could been removed as initial concentrations of NH+4-N and TP not more than 25 mg·L-1 and 2.5 mg·L-1, respectively.The removal efficiencies of NH+4-N was higher under N/P ratios of 5∶1 and 10∶1 than those under other N/P ratios, while TP removal was little affected. Futher more, the removal efficiencies of NH+4-N and TP exhibited 20% and 10% higher with starvation treatment of 2 days to 3 days than that without-starvation treatment, and increased about 80% and 30% for the treatments with inorganic carbon source compared to that without inorganic carbon source, respectively. |
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