title: Effect of cobalt enrichment on growth and hydrocarbon accumulation of Botryococcus braunii with immobilized biofilm attached cultivation.
abstract: The effects of cobalt enrichment on the growth and hydrocarbon accumulation were studied with biofilm attached cultivation. Under biofilm attached cultivation conditions, the microalga Botryococcus braunii survived high concentration of cobalt (50× normal level). The crude hydrocarbon content as well as the long C chain component (C31) increased under Co enrichment treatment indicating the activity of key enzyme that catalyze hydrocarbon synthesis might be enhanced by Co enrichment. The reduced carbohydrate and protein contents accompanied by increased hydrocarbon content for Co enrichment treatment indicating the Co was also an effective factor that controls the carbon flow of B. braunii. Under Co enrichment treatment, totally 1473.9 μmol of Co element was consumed to produce one gram of algal biomass, indicating this attached cultivation method is high efficient in heavy metal elements removal.
authors.affiliation: Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong 266101, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China.
authors.forename: Pengfei
authors.initials: P
authors.lastname: Cheng
authors.affiliation: Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong 266101, PR China. Electronic address: wangjf@qibebt.ac.cn.
authors.forename: Junfeng
authors.initials: J
authors.lastname: Wang
authors.affiliation: Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, Shandong 266101, PR China.
authors.forename: Tianzhong
authors.initials: T
authors.lastname: Liu
mesh_terms: D020418:Algal Proteins / Q000378:metabolism; D018441:Biofilms / Q000254:growth & development*; D018533:Biomass; D002241:Carbohydrates / Q000032:analysis; D018929:Cell Culture Techniques / Q000379:methods*; D018914:Cells, Immobilized / Q000187:drug effects / Q000378:metabolism; D000460:Chlorophyta / Q000187:drug effects / Q000254:growth & development* / Q000378:metabolism*; D003035:Cobalt / Q000494:pharmacology*; D006838:Hydrocarbons / Q000378:metabolism*; D009566:Nitrates / Q000494:pharmacology
chemical_list: D020418:Algal Proteins; D002241:Carbohydrates; D006838:Hydrocarbons; D009566:Nitrates; D003035:Cobalt
keywords: Attached cultivation; Botryococcus braunii; Cobalt enrichment; Hydrocarbon