钝顶螺旋藻固定模拟烟道气中的CO_2

研究了钝顶螺旋藻对模拟烟道气中CO2的固定性能,及其对NOx和SOx水溶形态亚硝态氮、亚硫酸氢根的耐受性。结果显示：随CO2浓度的增加,藻细胞达到最大比生长速率的时间缩短,CO2浓度为15%时藻细胞比生长速率达到最大的时间最短,生物量最终达到最大值4.1 g/L;CO2浓度为15%时藻细胞的固碳率为12.34 mg/（L·h）。研究发现,钝顶螺旋藻能够耐受浓度小于10 mmol/L的亚硝态氮,可将其作为钝顶螺旋藻生长的唯一氮源,但藻生长的延迟期增长。钝顶螺旋藻能够耐受8 mmol/L的亚硫酸氢盐,可将其作为生长的唯一硫源,藻细胞6 d后开始快速增长。

C02 fixation in simulated flue gas by Spirulina platensis

The capability of carbon fixation in simulated flue gas and the tolerance to water-soluble nitrite and bisulfite were investigated. The results showed that with the increase of CO2 concentration, the time that the algae cell grew to the maximum specific growth rate could be shortened at a higher CO2 concentration. The time was shortest at the 15% CO2 and the final biomass of Spirulina platensis was 4.1 g/L. The carbon fixation rate was 12.34 mg/（L ~ h） at the 15% CO2. The growth of Spirulina platensis can tolerate the nitrite with the con- tent lower than 10 mmol/L, which could be as the only nitrogen source, while the lag phase was prolonged by studies. Spirulina platensis can tolerate the bisulfite with content lower than 8 mmol/L and bisulfite can be as the sole sulfur source,the algae grew rapidly after the cultivation of 6 d.