Department of Environmental Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark; Sino-Danish College of University of Chinese Academy of Sciences, Beijing 100049, China; Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Department of Environmental Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark; Department of Chemical and Biochemical Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark.
Bioresour Technol. 2021 Apr;326:124761. doi: 10.1016/j.biortech.2021.124761. Epub 2021 Jan 22.
High-strength organic wastewater, e.g., potato juice wastewater, exerts high stress on the environment. This study proposes an integrated system for simultaneous high-strength organic wastewater treatment and nutrients upcycling for astaxanthin production by the combination of anaerobic processes and microalgae (Haematococcus pluvialis) cultivation. The potato juice wastewater was pretreated by either acidification or methanation. The effluents of both pretreatments achieved higher biomass yields of H. pluvialis compared to cultivation in standard culture media (control). The high acetate and potassium concentrations of the acidification effluents resulted in significantly higher astaxanthin production (24.5-27.9 mg g, 3 days) compared to the control (14.7 mg g, 12 days) in a shorter period. The integrated system contributed to a final removal efficiency of 51.3-75.8%, 86.5-98.3%, and 69.4-83.4% for COD, phosphorus, and ammonia, respectively. This study presents a promising two-stage process for simultaneous efficient methane and astaxanthin production, as well as remediation of high-strength organic wastewater.
高浓度有机废水，如土豆汁废水，对环境施加了很高的压力。本研究提出了一种集成系统，通过厌氧工艺和微藻（雨生红球藻）培养的结合，同时进行高浓度有机废水处理和营养物升级利用以生产虾青素。土豆汁废水通过酸化或甲烷化进行预处理。与在标准培养基中培养相比（对照），两种预处理的流出物都实现了更高的雨生红球藻生物量产量。酸化流出物中的高乙酸盐和钾浓度导致虾青素产量显著增加（3 天达到 24.5-27.9 mg g），而对照（14.7 mg g，12 天）则在较短的时间内达到。该集成系统对 COD、磷和氨的最终去除效率分别为 51.3-75.8%、86.5-98.3%和 69.4-83.4%。本研究提出了一种有前途的两段式工艺，可同时高效地生产甲烷和虾青素，并修复高浓度有机废水。
