title: Bioflocculants from hydrolysates of corn stover using isolated strain Ochrobactium ciceri W2.
abstract: This study isolated a total of seven pure cultures from activated sludge that could produce bioflocculants from 1.7% v/v H2SO4 treated hydrolysates of corn stover. The most effective strain amongst the seven isolates was identified as Ochrobactrum ciceri W2. The W2 cells produced biopolymers in logarithm growth phase, peaking at 3.8 g l(-1)in productivity on 16 h. The yielded bioflocculant was primarily consisting of polysaccharides and proteins, and maintained its flocculating activity to 0.5% w/w kaolin suspensions over pH 1-10 (at 30°C) and 30-100°C (at pH 7). This study also revealed that the strain W2 could utilize biopolymers from hydrolysate of corn stover without addition of excess phosphate salts, which could largely reduce production costs of bioflocculants.
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
authors.forename: Li
authors.initials: L
authors.lastname: Wang
authors.forename: Fang
authors.initials: F
authors.lastname: Ma
authors.forename: Duu-Jong
authors.initials: DJ
authors.lastname: Lee
authors.forename: Aijie
authors.initials: A
authors.lastname: Wang
authors.forename: Nanqi
authors.initials: N
authors.lastname: Ren
mesh_terms: D001709:Biotechnology / Q000379:methods*; D005427:Flocculation; D042041:Ochrobactrum / Q000378:metabolism*; D011492:Protein Hydrolysates / Q000378:metabolism*; D012722:Sewage / Q000382:microbiology*; D013464:Sulfuric Acids / Q000378:metabolism; D014866:Waste Products / Q000032:analysis*; D003313:Zea mays / Q000737:chemistry*
chemical_list: D011492:Protein Hydrolysates; D012722:Sewage; D013464:Sulfuric Acids; D014866:Waste Products; C033158:sulfuric acid