Photosynthetic bacteria collection by three flocculants
HE Dan, GAO Jian-liang, YAN Jin, ZHAO Yu-hui, ZHANG Di, CAI Jin-ling
Tianjin Key Laboratory for Brine Chemical Industry and Ecological Utilization of Brine Resource, College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin 300457, China
Abstract: Photosynthetic bacteria (PSB) are hard to be recovered due to their small size,lower density in culturing medium and high electronegativity,which hampers their commercial application.Flocculation has been widely used to recover microbiological biomass because of its low cost and high efficiency.Three flocculants,such as Al2(SO4)3,FeCl3,and chitosan,are used to recover PSB biomass.Results show that all three flocculants can efficiently recover PSB biomass.Among them,the optimum concentration of ferric chloride to collect photosynthetic bacteria is 1.9 g·L-1,by which the recovery rate of PSB biomass can reach as high as (99.99±0.01)%;the optimum concentration of aluminum sulfate is 1.5 g·L-1,which can bring about a recovery rate of (98.24±0.01)%;and the optimum concentration of chitosan is 0.008 g·L-1,by which the recovery rate is (84.20±0.02)%.Chitosan is more suitable for collecting photosynthetic bacteria because of its low dosage and non-toxic.
何丹, 高建亮, 闫谨, 赵玉慧, 张迪, 才金玲. 三种絮凝剂采收光合细菌的研究[J]. 现代化工, 2020, 40(8): 150-153,157.
HE Dan, GAO Jian-liang, YAN Jin, ZHAO Yu-hui, ZHANG Di, CAI Jin-ling. Photosynthetic bacteria collection by three flocculants. Modern Chemical Industry, 2020, 40(8): 150-153,157.
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