CO2 Fixation, Lipid Production, and Power Generation by a Novel Air-Lift-Type Microbial Carbon Capture Cell System.
An air-lift-type microbial carbon capture cell (ALMCC) was constructed for the first time by using an air-lift-type photobioreactor as the cathode chamber. The performance of ALMCC in fixing high concentration of CO2, producing energy (power and biodiesel), and removing COD together with nutrients was investigated and compared with the traditional microbial carbon capture cell (MCC) and air-lift-type photobioreactor (ALP). The ALMCC system produced a maximum power density of 972.5 mW·m(-3) and removed 86.69% of COD, 70.52% of ammonium nitrogen, and 69.24% of phosphorus, which indicate that ALMCC performed better than MCC in terms of power generation and wastewater treatment efficiency. Besides, ALMCC demonstrated 9.98- and 1.88-fold increases over ALP and MCC in the CO2 fixation rate, respectively. Similarly, the ALMCC significantly presented a higher lipid productivity compared to those control reactors. More importantly, the preliminary analysis of energy balance suggested that the net energy of the ALMCC system was significantly superior to other systems and could theoretically produce enough energy to cover its consumption. In this work, the established ALMCC system simultaneously achieved the high level of CO2 fixation, energy recycle, and municipal wastewater treatment effectively and efficiently.
Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology , Linggong Road 2, Dalian, Liaoning 116024, China.
Xia
X
Hu
Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology , Linggong Road 2, Dalian, Liaoning 116024, China.
Baojun
B
Liu
Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology , Linggong Road 2, Dalian, Liaoning 116024, China.
Jiti
J
Zhou
Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology , Linggong Road 2, Dalian, Liaoning 116024, China.
Ruofei
R
Jin
Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology , Linggong Road 2, Dalian, Liaoning 116024, China.
Sen
S
Qiao
Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology , Linggong Road 2, Dalian, Liaoning 116024, China.
Guangfei
G
Liu
D000388:Air; D001674:Bioelectric Energy Sources; D057919:Biological Oxygen Demand Analysis; D057486:Carbon Cycle; D002245:Carbon Dioxide / Q000378:metabolism*; D004560:Electricity; D004566:Electrodes; D008055:Lipids / Q000096:biosynthesis*; D058086:Microalgae / Q000254:growth & development / Q000378:metabolism* / Q000648:ultrastructure; D009584:Nitrogen / Q000302:isolation & purification; D010758:Phosphorus / Q000302:isolation & purification; D058433:Photobioreactors / Q000382:microbiology*; D012996:Solutions; D014865:Waste Disposal, Fluid
D008055:Lipids; D012996:Solutions; D002245:Carbon Dioxide; D010758:Phosphorus; D009584:Nitrogen