模拟烟气条件下野生混合微藻的培养

开发利用生物质能是解决能源紧张和一系列全球环境问题的有效途径之一.微藻是一种具有发展前途的新型生物质能原料，利用烟气培养微藻不仅为生物质能的开发提供了新的途径，而且能够直接削减烟气CO₂的排放，对于减缓全球气候变化具有积极意义.以野生混合微藻为对象，利用模拟烟气在柱状光生物反应器内培养微藻，通过180 d的培养，考察光照条件和CO₂对微藻生长的影响及光照条件对细胞粗脂肪含量的影响.结果表明:驯化后的混合微藻对CO₂具有生理敏感性，烟气中的CO₂可以明显提高其生长速率；全天光照可提高微藻生长速率，并有利于生长速率和微藻生物量的稳定；在微藻生物量和光合有效辐射日总量一定的条件下，全天24 h光照比12 h∶12 h更有利于细胞粗脂肪的积累. 

Cultivation of Wild Mixed Microalgae by Synthetic Flue Gas

Developing bioenergy is one of the available ways to alleviate the energy crisis and mitigate global climate change.Microalgae are a new form of bioenergy and have a great future.Cultivation of microalgae by synthetic flue gas provides a new strategy to develop bioenergy and directly decreases CO_2 emission in the flue gas,which has significant impact on climate change.This paper studied the cultivation of wild mixed microalgae using synthetic flue gas in a column photo reactor.The effects of carbon dioxide concentration,conditions of illumination on the growth of microalgae as well as the crude fat content in microalgae were investigated during 180 days cultivation.The results showed that the acclimated mixed microalgae were sensitive to CO_2.The microalgae growth rate could be greatly enhanced by feeding with CO_2compared with the ones fed with air.Continuous illumination for 24 h was beneficial for microalgae growth and stability of growth rate.Under the conditions of same microalgae biomass and daily photosynthetic active radiation,the accumulation of crude fat would benefit from decreased radiation intensity and increased illumination time.