Recently, as an emerging persistent dissolved organic pollutant (DOP), gallic acid (GA) and its efficient decomposition methods have received global attention. The present work aimed to compare the effect of Aspergillus oryzae 5992 and Phanerochaete chrysosporium 40719 on degradation of different concentrations of GA. The A. oryzae grew well and achieved a GA removal rate up to 99% in media containing 1–4% GA, much higher than P. chrysosporium. The activity of laccase and lignin peroxidase excreted by A. oryzae was higher than that by P. chrysosporium in the presence of GA. Based on the results of high-performance liquid chromatography–electrospray ionization–mass spectrometry, three relevant intermediate metabolites were determined as progallin A, methyl gallate, and pyrogallic acid, implying that A. oryzae could not degrade GA unless the carboxyl in the molecule was protected or removed. In view of the ability of A. oryzae to accommodate a high concentration of GA and achieve a high removal rate, as well as the significantly different enzyme activities involved in GA degradation and the underlying mechanisms between the two fungal strains, A. oryzae is proven to be a superior strain for the degradation of DOP.
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Research Article|
May 12 2014
A comparative study on the degradation of gallic acid by Aspergillus oryzae and Phanerochaete chrysosporium
Danzhao Guo
;
Danzhao Guo
1School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
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Zhicai Zhang
;
1School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
2Institute of Agro-Production Processing Engineering, Jiangsu University, Xuefu Road 301, Zhenjiang 212013, China
E-mail: zhangtamei@163.com
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Dan Liu
;
Dan Liu
1School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
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Huihua Zheng
;
Huihua Zheng
3Jiangsu Alphay Bio-technology Co. Ltd, Nantong 226009, China
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Hui Chen
;
Hui Chen
3Jiangsu Alphay Bio-technology Co. Ltd, Nantong 226009, China
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Keping Chen
Keping Chen
4Institute of Life Sciences, Jiangsu University, Zhenjiang 212013, China
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Water Sci Technol (2014) 70 (1): 175–181.
Article history
Received:
November 26 2013
Accepted:
April 22 2014
Citation
Danzhao Guo, Zhicai Zhang, Dan Liu, Huihua Zheng, Hui Chen, Keping Chen; A comparative study on the degradation of gallic acid by Aspergillus oryzae and Phanerochaete chrysosporium. Water Sci Technol 1 July 2014; 70 (1): 175–181. doi: https://doi.org/10.2166/wst.2014.213
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