Institute of Organic Chemistry, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland.
Department of Environmental Engineering, Institute of Engineering and Environmental Protection, University of Warmia and Mazury in Olsztyn, Warszawska 117 a, 10-720 Olsztyn, Poland.
Molecules. 2020 Apr 14;25(8):1790. doi: 10.3390/molecules25081790.
Algae are employed commonly in cosmetics, food and pharmaceuticals, as well as in feed production and biorefinery processes. In this study, post-fermentation leachate from a biogas plant which exploits stillage and maize silage was utilized as a culture medium for . The content of polyphenols in hydrophilic extracts of the biomass was determined, and the extracts were evaluated for their antioxidant activity (DPPH assay), antibacterial activity (against , , , ) and antifungal activity (against , , ). The use of the post-fermentation leachate was not found to affect the biological activity of the microalgae. The aqueous extract of biomass was also observed to exhibit activity against nematodes. The results of this study suggest that biomass cultured on post-fermentation leachate from a biogas plant can be successfully employed as a source of natural antioxidants, food supplements, feed, natural antibacterial and antifungal compounds, as well as in natural methods of plant protection.
藻类被广泛应用于化妆品、食品和制药行业，以及饲料生产和生物炼制过程中。在这项研究中，利用沼气厂发酵后的渗滤液（利用酒糟和玉米青贮饲料）作为培养微藻的培养基。测定了亲水性提取物中多酚的含量，并通过 DPPH 法评估了提取物的抗氧化活性、对 、 、 、 、 、 的抑菌活性和抗真菌活性（对 、 、 ）。研究结果表明，发酵后的渗滤液不会影响微藻的生物活性。从沼气厂发酵后的渗滤液中培养的生物质的水提取物也表现出对线虫的活性。本研究表明，从沼气厂发酵后的渗滤液中培养的生物质可以成功地用作天然抗氧化剂、食品补充剂、饲料、天然抗菌和抗真菌化合物的来源，以及在植物保护的天然方法中使用。
