Microalgal Systems, a Green Solution for Wastewater Conventional Pollutants Removal, Disinfection, and Reduction of Antibiotic Resistance Genes Prevalence?

被引:2
|
作者
Amaro, Helena M. [1 ,2 ]
Sousa, Joana F. [1 ,2 ]
Salgado, Eva M. [1 ,2 ]
Pires, Jose C. M. [1 ,2 ]
Nunes, Olga C. [1 ,2 ]
机构
[1] Univ Porto, Fac Engn, Lab Proc Engn Environm Biotechnol & Energy, LEPABE, Rua Dr Roberto Frias, P-4200465 Porto, Portugal
[2] Univ Porto, Fac Engn, ALiCE Associate Lab Chem Engn, Rua Dr Roberto Frias, P-4200465 Porto, Portugal
来源
APPLIED SCIENCES-BASEL | 2023年 / 13卷 / 07期
关键词
wastewater treatment; microalgae technology; reduction of pathogens proliferation; antibiotic resistance; EXTRACELLULAR POLYMERIC SUBSTANCES; CLASS; INTEGRON; STABILIZATION PONDS; TREATMENT PLANTS; BACTERIAL PROCESSES; CHLORELLA-VULGARIS; PH;
D O I
10.3390/app13074266
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The low-efficiency rate of urban wastewater (UWW) treatment generates tons of discharged water with a high concentration of pollutants, pathogens and antibiotic-resistance genes (ARGs). Microalgal systems may be a green alternative to be implemented as a UWW polishing treatment. This study assessed the ability of Chlorella vulgaris and UWW autochthonous microalgal species (AMS) to simultaneously remove PO4-P, and reduce the proliferation of coliforms and ARGs. AMS seems to be more promising due to: (i) the higher specific growth rate, mu(max) (0.687 +/- 0.065 d(-1)); (ii) efficient PO4-P removal (92.62 +/- 0.10%); (iii) faster reduction of coliforms proliferation achieving concentrations below the limits of quantification (6 d); (iv) the reduction of intl1 and the ARGs sul1 and blaTEM abundance in ca. of 70.4%, 69.2%, and 75.7%, respectively (9 d); and (v) the additional reduction of these genes in ca. of 97.1%, 94.2%, and 99.9%, respectively, after 5 d storage in the dark and at room temperature. Results also revealed that the high pH values in both microalgal systems (due to microalgal growth) were highly correlated with a reduction in the proliferation of coliforms, including Escherichia coli. In conclusion, using AMS as a final polishing treatment of UWW seems to be very promising.
引用
收藏
页数:16
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