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Issue 4, 2011
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Biogas production and microcystin biodegradation in anaerobic digestion of blue algae

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Abstract

In order to demonstrate the potentials of both bioenergy production and microcystin (MC) biodegradation in methanogenic conditions, the biogas production, process stability and the variation of MC concentration in anaerobic digestion of blue algae from Taihu Lake were studied. A methane yield of 189.89 mL g−1 VS was obtained from the digester, and the average methane concentration in the biogas was 36.72%. During the digestion, the pH value was fairly constant (6.8 to 7.6), and soluble chemical oxygen demand (SCOD) kept at a relatively stable level. The concentration of total volatile fatty acid (VFA) increased significantly in the first 8 days, and then decreased, showing no inhibition on the digestion. The results also showed that the concentration of MC could be significantly reduced from 1220.19 μg L−1 to 35.17 μg L−1 during the methanogenic process, which followed the first order kinetics well. These findings suggest that anaerobic digestion of blue algae can both generate renewable energy biogas and lead to biodegradation of MC, presenting significant potentials for bioremediation of MC and post-treatment of blue algae.

Graphical abstract: Biogas production and microcystin biodegradation in anaerobic digestion of blue algae

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Publication details

The article was received on 19 Sep 2010, accepted on 11 Feb 2011 and first published on 08 Mar 2011


Article type: Paper
DOI: 10.1039/C0EE00452A
Citation: Energy Environ. Sci., 2011,4, 1511-1515
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    Biogas production and microcystin biodegradation in anaerobic digestion of blue algae

    X. Yuan, X. Shi, D. Zhang, Y. Qiu, R. Guo and L. Wang, Energy Environ. Sci., 2011, 4, 1511
    DOI: 10.1039/C0EE00452A

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