Journal
BIORESOURCE TECHNOLOGY
Volume 221, Issue -, Pages 284-290Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2016.09.036
Keywords
Microalgae; Antibiotics-containing wastewater; Cephalosporins; 7-ACA; Lipid production
Funding
- Harbin Institute of Technology Fund for young top-notch talent teachers [AUGA5710052514]
- National Natural Science Fund of China [51678188]
- State key Laboratory of Urban Water Resource and Environment [ES201602]
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The aim of this study is to evaluate the feasibility of using lipid-accumulating microalgae to remove cephalosporin antibiotics 7-amino cephalosporanic acid (7-ACA) from wastewater with the additional benefit of biofuels production. Three isolated microalgal strains (namely, Chlorella sp. Cha-01, Chlamydomonas sp. Tai-03 and Mychonastes sp. YL-02) were cultivated under 7-ACA stress and their biomass productivity, lipid production and N-NO3 consumption were monitored. It was found that 7-ACA had slight inhibition effects on the microalgal growth at the ratio of 12.0% (Cha-01), 9.6% (YL-02), 11.7% (Tai-03). However, lipid accumulation in the three microalgae was not influenced by the presence of 7-ACA. The investigation on the 7-ACA removal mechanisms during microalgal growth shows that 7-ACA was mainly removed by microalgae adsorption as well as hydrolysis and photolysis reactions. This study demonstrates that using microalgae to treat antibiotic-containing wastewater is promising due to the potential of simultaneous antibiotic removal and biofuel production. (C) 2016 Elsevier Ltd. All rights reserved.
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