Yu Qian, Yin Manshuang, Chen Yanrui, Liu Shiqi, Wang Shuo, Li Yuying, Cui Hongli, Yu Daoyong, Ge Baosheng, Huang Fang
State Key Laboratory of Heavy Oil Processing and Center for Bioengineering and Biotechnology, China University of Petroleum (East China), Qingdao, 266580, PR China.
Yantai Institute of Coastal Zone, Chinese Academy of Sciences, Yantai, 264003, PR China.
J Environ Manage. 2023 May 1;333:117389. doi: 10.1016/j.jenvman.2023.117389. Epub 2023 Feb 7.
Carbon dioxide and nitrogen oxides are the main components of fossil flue gas causing the most serious environmental problems. Developing a sustainable and green method to treat carbon dioxide and nitrogen oxides of flue gas is still challenging. Here, a co-cultured microalgae/bacteria system, Chlorella vulgaris and Pseudomonas sp., was developed for simultaneous sequestration of CO and removal of nitrogen oxides from flue gas, as well as producing valuable microalgae biomass. The co-cultured Chlorella vulgaris and Pseudomonas sp. showed the highest CO fixation and NO-N removal rate of 0.482 g Ld and 129.6 mg Ld, the total chlorophyll accumulation rate of 65.6 mg L at the initial volume ratio of Chlorella vulgaris and Pseudomonas sp. as 1:10. The NO-N removal rate can be increased to 183.5 mg Ld by continuous addition of 0.6 g Ld of glucose, which was 37% higher than that of co-culture system without the addition of glucose. Photosynthetic activity and carbonic anhydrase activity of Chlorella vulgaris were significantly increased when co-cultured with Pseudomonas sp. Excitation-emission matrix (EEM) fluorescence spectroscopy indicated that the humic acid-like substances released from Pseudomonas sp. could increase the growth of microalgae. This work provides an attractive way to simultaneously treatment of CO and NO from flue gas to produce valuable microalgal biomass.
二氧化碳和氮氧化物是造成最严重环境问题的化石烟气的主要成分。开发一种可持续的绿色方法来处理烟气中的二氧化碳和氮氧化物仍然具有挑战性。在此，开发了一种共培养的微藻/细菌系统，即普通小球藻和假单胞菌属，用于同时固定烟气中的一氧化碳和去除氮氧化物，以及生产有价值的微藻生物质。共培养的普通小球藻和假单胞菌属在普通小球藻与假单胞菌属的初始体积比为1:10时，显示出最高的一氧化碳固定率和一氧化氮-氮去除率，分别为0.482 g L⁻¹ d⁻¹和129.6 mg L⁻¹ d⁻¹，总叶绿素积累率为65.6 mg L⁻¹。通过连续添加0.6 g L⁻¹的葡萄糖，一氧化氮-氮去除率可提高到183.5 mg L⁻¹ d⁻¹，比不添加葡萄糖的共培养系统高37%。与假单胞菌属共培养时，普通小球藻的光合活性和碳酸酐酶活性显著增加。激发-发射矩阵（EEM）荧光光谱表明，假单胞菌属释放的类腐殖酸物质可以促进微藻生长。这项工作为同时处理烟气中的一氧化碳和一氧化氮以生产有价值的微藻生物质提供了一种有吸引力的方法。
