Characteristics of a Extracellular Bioflocculant From a Serratia plumuthica Isolate
Physico-chemical and flocculating properties of a bioflocculant, producing by a Serratia plumuthica isolate, were studied. The bioflocculant was identified as an acid polysaccharide consisting of galactose, talose, glucose, mannose and galaturonic acid in a ratio of 34.5:5.1:24.5:29.6: 9.2. Its molecular weight was estimated to be 1.8×106. The bioflocculant was found to be effective for flocculation of a kaolin suspension, when added at a concentration of 1～10 mg/L, in a broad pH range of 2～9 and temperature range of 10～80℃. Its flocculating activity was synergistically stimulated by the bivalent or trivalent cations such as Ca2+, Mg2+, Al3+ and Fe3+. In addition, it could efficiently flocculate a variety of suspensions, including paper-making wastewater, oil-producing wastewater, black ink, alga cell suspension and activated sludge.
Serratia plumuthica Bioflocculant Flocculating activity Acid polysacchadide
Sheng-kang Liang Dan-dan Song
Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, 266003, China College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266003, China
国际会议
青岛
英文
223-226
2009-10-09（万方平台首次上网日期，不代表论文的发表时间）