Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4998045 | Bioresource Technology | 2016 | 7 Pages |
â¢Three lipid-rich microalgae examined exhibited relatively high resistance to 7-ACA.â¢7-ACA at 100 mg Lâ1 could be completely removed during microalgae cultivation.â¢7-ACA removal in algal culture was due to hydrolysis, photolysis and biosorption.â¢Using lipid-rich microalgae to treat antibiotics-containing wastewater is promising.
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-NO3â 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.
Graphical abstractSchematic diagram of 7-ACA removal in cultivation of lipid-rich microalgae.Download high-res image (172KB)Download full-size image