文献类型：期刊文献

英文题名：Assessment of light distribution model for marine red microalga Porphyridium purpureum for sustainable production in photobioreactor

作者：Li, Shaohua[1,3];Huang, Jianke[2];Ji, Liang[1];Chen, Cheng[1];Wu, Ping[1];Zhang, Wei[1];Tan, Gaoyi[1];Wu, Haizhen[1,4];Fan, Jianhua[1,4]

机构：[1]East China Univ Sci & Technol, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China;[2]Hohai Univ, Coll Oceanog, Inst Marine Biotechnol & Bioresource Utilizat, Nanjing 210098, Peoples R China;[3]Hunan Inst Engn, Coll Mat & Chem Engn, Xiangtan 411104, Peoples R China;[4]East China Univ Sci & Technol, Dept Appl Biol, Shanghai 200237, Peoples R China

年份：2021

卷号：58

外文期刊名：ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000730081700012)】；

基金：This work was sponsored by National Key Research and Develop-ment Program of China 2019YFA0906300 and 2020YFA0907304, Nat-ural Science Foundation of Shandong Province ZR2019ZD17, the Fundamental Research Funds for the Central Universities B200201001, National Natural Science Foundation of China 31872608, Natural Sci-ence Foundation of Shanghai 21ZR1416400 and 18ZR1410100, Fund-ing Project of the State Key Laboratory of Bioreactor Engineering, and the Natural Science Foundation of Hunan Province 2020JJ2012.

语种：英文

外文关键词：Red algae; Biomass productivity; Sustainability production; Light distribution model; Volume-averaged light intensity

摘要：Microalgae can accumulate large amounts of nutrients from sustainable elements cycling and wastewater reuse. Light is a key factor determining productivity of algal biomass when recycling. However, light is unevenly distributed in photobioreactors due to light absorption and scatter by algal cells. Understanding the laws of light distribution is needed for optimizing the culture process. In this study, a light distribution model for red alga Porphyridium purpureum was used to optimize the cultivation process and improve culture performance by controlling light intensity. Compared to the Lambert-Beer model, the Hyperbolic law is more flexible and is applicable in a larger range of cell densities. In addition, the content of intracellular phycobiliprotein has a great influence on light distribution inside the photobioreactor while a higher biomass concentration reduces its impact. A maximum biomass concentration of 24.7 g/L along with 1.2 g/L/d cell growth rate was achieved by increasing incident light intensity in a stepwise fashion. The overall light conditions inside the photobioreactor during the culture process was also analyzed and di99scussed based on light distribution models. A volume-averaged light intensity regulated at similar to 50 mu mol/m(2)/s along with an incident light intensity of less than 540 mu mol/m(2)/s is an appropriate light condition for Porphyridium purpureum culture. The outcomes of light distribution model assessment and stepwise fashion regulation strategy can be applied to red microalgae in general, especially for high cell density cultivation. These findings provide an essential base for culture optimization, which can be used in future industrial applications of P. purpureum for water clean and sustainability of human nourishment production.