Characterization and flocculation mechanism of a bioflocculant from hydrolyzate of rice stover.
This study investigated the characterization and flocculation mechanism of a bioflocculant from hydrolyzate of rice stover. Production of the bioflocculant was positively associated with cell growth and a highest value of 2.4 g L(-1) was obtained. During the kaolin suspension flocculation, charge neutralization and inter-particle bridging were proposed as the reasons for enhanced performance. Apart from this, the bioflocculant showed good performances in sludge dewatering and swine wastewater pretreatment. After conditioning by the bioflocculant, dry solids (DS) and specific resistance to filtration (SRF) of the sludge reached 18.4% and 4.8×10(12) m kg(-1), respectively, which were much better than that by conventional chemical flocculants. In the swine wastewater pretreatment, the removal efficiencies of COD, ammonium, and turbidity reached 48.3%, 43.6% and 75.8% at pH 8.0 when the bioflocculant dose was adjusted to 20 mg L(-1).
['Guo|Junyuan|J|', 'Yu|Jing|J|', 'Xin|Xin|X|', 'Zou|Changwu|C|', 'Cheng|Qingfeng|Q|', 'Yang|Huaijin|H|', 'Nengzi|Lichao|L|']
D000818:Animals D004795:Enzyme Stability D005427:Flocculation D006868:Hydrolysis D007616:Kaolin D012275:Oryza D012722:Sewage D013056:Spectrophotometry, Ultraviolet D017550:Spectroscopy, Fourier Transform Infrared D055672:Static Electricity D013535:Suspensions D013552:Swine D013696:Temperature D013997:Time Factors D014866:Waste Products D062065:Waste Water D018508:Water Purification
Bioflocculant Rice stover Sludge dewatering Swine wastewater pretreatment