Laboratory of Analytical Chemistry and Applied Ecochemistry, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium; GEMMA-Group of Environmental Engineering and Microbiology, Department of Civil and Environmental Engineering, Universitat Politècnica de Catalunya·BarcelonaTech, Jordi Girona 1-3, Building D1, 08034 Barcelona, Spain.
Laboratory of Analytical Chemistry and Applied Ecochemistry, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium.
Bioresour Technol. 2021 Aug;333:125239. doi: 10.1016/j.biortech.2021.125239. Epub 2021 Apr 28.
This study assessed the selenium (Se) removal efficiency of two pilot-scale high-rate algae ponds (HRAPs) treating domestic wastewater and investigated the production of Se-enriched microalgae as potential feed supplement. The HRAP-Se had an average Se, NH-N, total phosphorus and COD removal efficiency of, respectively, 43%, 93%, 77%, and 70%. Inorganic Se taken up by the microalgae was mainly (91%) transformed to selenoamino acids, and 49-63% of Se in the Se-enriched microalgae was bioaccessible for animals. The crude protein content (48%) of the microalgae was higher than that of soybeans, whereas the essential amino acid content was comparable. Selenium may induce the production of the polyunsaturated fatty acids omega-3 and omega-6 in microalgae. Overall, the production of Se-enriched microalgae in HRAPs may offer a promising alternative for upgrading low-value resources into high-value feed supplements, supporting the drive to a circular economy.
本研究评估了两个中试规模的高效藻类塘（HRAP）处理生活污水的硒（Se）去除效率，并研究了富硒微藻的生产作为潜在的饲料补充。HRAP-Se 对 Se、NH-N、总磷和 COD 的平均去除效率分别为 43%、93%、77%和 70%。微藻吸收的无机硒主要（91%）转化为硒代氨基酸，富硒微藻中 49-63%的硒对动物是可生物利用的。微藻的粗蛋白含量（48%）高于大豆，而必需氨基酸含量相当。硒可能诱导微藻中多不饱和脂肪酸 omega-3 和 omega-6 的产生。总的来说，在 HRAP 中生产富硒微藻可能为将低价值资源升级为高价值饲料补充品提供了一种有前途的替代方法，支持向循环经济发展。
