Materials and Resources Research Group, Innovative Materials and Resources Research Center, Public Works Research Institute, Tsukuba, Japan.
Environ Technol. 2021 Nov;42(25):3907-3919. doi: 10.1080/09593330.2020.1753817. Epub 2020 Apr 22.
Microalgae have been recently cultivated using resources from wastewater treatment plants, including nutrients, CO, and heat. In the present study, we focused on the natural cultivation of total microalgae rather than specific microalgae, for which culture conditions and the cultivation environment are difficult to prepare. Natural microalgal cultivation systems using 380-L raceway tanks were operated outdoors for 8 months and the effects of the culture substrate were investigated. The cultivation substrate was the primary effluent with or without excess sludge. The results showed that when diluted excess sludge was added to the substrate, microalgal biomass increased more than when the substrate contained only primary effluent. Additionally, the wastewater suspended matter and water quality were removed, reaching low levels. Microalgal culture systems using excess sludge showed higher organic acid content, higher biochemical methane potential, and higher efficiency in producing more microalgal biomass than wastewater treatment plant systems that did not use excess sludge.
最近，人们利用废水处理厂中的资源（包括养分、CO 和热能）来培养微藻。在本研究中，我们专注于总微藻的自然培养，而不是特定微藻的培养，因为后者的培养条件和培养环境难以准备。使用 380-L 跑道槽的自然微藻培养系统在户外运行了 8 个月，并研究了培养基质的影响。培养基质是含有或不含有剩余污泥的一次处理出水。结果表明，当向基质中添加稀释的剩余污泥时，微藻生物量的增加多于仅使用一次处理出水作为基质时的情况。此外，废水中的悬浮物和水质得到了去除，达到了较低的水平。与未使用剩余污泥的废水处理厂系统相比，使用剩余污泥的微藻培养系统具有更高的有机酸含量、更高的生物甲烷潜力和更高的生产更多微藻生物量的效率。
