title: Poly-γ-glutamic acid produced from Bacillus licheniformis CGMCC 2876 as a potential substitute for polyacrylamide in the sugarcane industry.
abstract: As an environmentally friendly and industrially useful biopolymer, poly-γ-glutamic acid (γ-PGA) from Bacillus licheniformis CGMCC 2876 was characterized by the high-resolution mass spectrometry and (1)H NMR. A flocculating activity of 11,474.47 U mL(-1) obtained with γ-PGA, and the effects of carbon sources, ions, and chemical properties (D-/L-composition and molecular weight) on the production and flocculating activity of γ-PGA were discussed. Being a bioflocculant in the sugar refinery process, the color and turbidity of the sugarcane juice was IU 1,877.36 and IU 341.41 with 0.8 ppm of γ-PGA, respectively, which was as good as the most widely used chemically synthesized flocculant in the sugarcane industry--polyacrylamide with 1 ppm. The γ-PGA produced from B. licheniformis CGMCC 2876 could be a promising alternate of chemically synthesized flocculants in the sugarcane industry.
authors.affiliation: Dept. of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005,, P.R. China.|Dept. of Chemistry, State University of New York at Binghamton, Binghamton, NY, 13902,, Unites States.
authors.forename: Shan
authors.initials: S
authors.lastname: Yan
authors.affiliation: Dept. of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005,, P.R. China.
authors.forename: Haosheng
authors.initials: H
authors.lastname: Yao
authors.affiliation: Dept. of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005,, P.R. China.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Chen
authors.affiliation: Dept. of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005,, P.R. China.
authors.forename: Shengquan
authors.initials: S
authors.lastname: Zeng
authors.affiliation: Dept. of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005,, P.R. China.
authors.forename: Xi
authors.initials: X
authors.lastname: Xi
authors.affiliation: Dept. of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005,, P.R. China.
authors.forename: Yuanpeng
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Dept. of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005,, P.R. China.
authors.forename: Ning
authors.initials: N
authors.lastname: He
authors.affiliation: Dept. of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005,, P.R. China.|Key Laboratory for Chemical Biology of Fujian Province, Xiamen University, Xiamen, 361005,, P.R. China.
authors.forename: Qingbiao
authors.initials: Q
authors.lastname: Li
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D001407:Bacillus / Q000378:metabolism*; D001704:Biopolymers / Q000096:biosynthesis* / Q000737:chemistry; D002244:Carbon / Q000737:chemistry; D003470:Culture Media / Q000737:chemistry; D005285:Fermentation; D005427:Flocculation; D019649:Food Industry; D008970:Molecular Weight; D011099:Polyglutamic Acid / Q000031:analogs & derivatives* / Q000096:biosynthesis / Q000737:chemistry; D031786:Saccharum / Q000737:chemistry*; D000099166:Polyacrylamides
chemical_list: D000180:Acrylic Resins; D001704:Biopolymers; D002244:Carbon; D003470:Culture Media; D011099:Polyglutamic Acid; D000099166:Polyacrylamides; C511775:poly(gamma-glutamic acid)
keywords: Bacillus licheniformis; bioflocculant; poly γ-glutamic acid; sugarcane industry