Chuntan Chen , Yu Wang , Qunwei Dai , Weiqi Du , Xinshuang Deng , Yulian Zhao , Qian Duan , Hepei Liu
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引用次数: 0
Abstract
The mutualistic interaction between microalgae and bacteria provides a new strategy for improving carbon fixation by microalgae. In this study, Chlorella was co-cultured with natural flora at 15 % (v/v) CO2 concentration for 120 d. Three Chlorella symbiotic bacteria strains were identified and were co-cultured with Chlorella vulgaris HL02 (C. vulgaris HL02) to fix high concentrations of CO2. The results showed that the symbiotic bacteria significantly enhanced the fixation of 15 % CO2 by Chlorella, with C. vulgaris HL02 + Aeromonas GS-HL01 having the highest carbon fixation efficiency, which was 22.31 % higher than that of the sterile control, followed by C. vulgaris HL02 + Bacillus GS-F03, and C. vulgaris HL02 + Microbacterium GS-H02 (which was also 16.36 % higher than the sterile control). The composition of harvested Chlorella was not altered significantly following co-culturing with bacteria. Scanning electron microscopy and Excitation–emission matrix spectra analyses showed that at high concentrations of CO2, Microalgae and bacteria promote mutual growth and CO2 fixation mainly through extracellular secretion of organic matter. Our results provided a new strategy to improve the efficiency of microalgae in fixing high concentration of CO2.
期刊介绍:
The Journal of CO2 Utilization offers a single, multi-disciplinary, scholarly platform for the exchange of novel research in the field of CO2 re-use for scientists and engineers in chemicals, fuels and materials.
The emphasis is on the dissemination of leading-edge research from basic science to the development of new processes, technologies and applications.
The Journal of CO2 Utilization publishes original peer-reviewed research papers, reviews, and short communications, including experimental and theoretical work, and analytical models and simulations.