Division of Biotechnology and Life Science, Institute of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan; Central Research Laboratory, Taiheiyo Cement Corporation, 2-4-2, Osaku, Sakura City, Chiba 285-8655, Japan.
Division of Biotechnology and Life Science, Institute of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan.
Bioresour Technol. 2021 Nov;340:125678. doi: 10.1016/j.biortech.2021.125678. Epub 2021 Jul 27.
The phosphorous supply crisis is a major challenge for a sustainable society, and the algal industry is not unrelated to this crisis. Recycling phosphorus from sewage wastewater is a potential way to address this issue. We previously developed amorphous calcium silicate hydrates (aCSH) as excellent phosphorus recovery materials. In this study, we designed a phosphorus recovery process using aCSH in a pilot-scale facility connected to a sewage wastewater treatment plant, and demonstrated the production of microalgal biomass using phosphorous-containing aCSH (P_aCSH). As a result, high phosphorous recovery rates (>80%) were obtained throughout the year. The carbohydrate-rich microalga Pseudoneochloris sp. NKY372003 was cultivable with P_aCSH. The biomass and carbohydrate productivity of this microalga with P_aCSH was comparable to that with conventional media. Approximately 94% of the phosphorus in P_aCSH was recycled into the biomass. This study successfully demonstrated the recycling the phosphorus recovered from wastewater for microalgal cultivation by aCSH.
磷供应危机是可持续社会面临的主要挑战，而藻类产业与此危机不无关系。从污水中回收磷是解决这一问题的一种潜在方法。我们之前开发了无定形硅酸钙水合物 (aCSH) 作为优异的磷回收材料。在这项研究中，我们设计了一个使用 aCSH 的磷回收工艺，该工艺在与污水处理厂相连的中试设施中进行，并展示了使用含磷 aCSH (P_aCSH) 生产微藻生物质的过程。结果，全年磷的回收率均>80%。富含碳水化合物的微藻 Pseudoneochloris sp. NKY372003 可以在 P_aCSH 上培养。这种微藻在 P_aCSH 上的生物量和碳水化合物生产力与传统培养基相当。P_aCSH 中约 94%的磷被回收进入生物量。这项研究成功地证明了通过 aCSH 从废水中回收的磷可用于微藻的培养。
