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首页> 外文期刊>Journal of Applied Polymer Science >Cationic starch for microalgae and total phosphorus removal from wastewater
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Cationic starch for microalgae and total phosphorus removal from wastewater

机译：阳离子淀粉，用于微藻类和废水中的总磷去除

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The city of Logan, Utah treats wastewater in 460 acres of facultative lagoons. Naturally growing algae in these lagoons uptake nutrients and remediate the wastewater, but require coagulation and flocculation for separation from wastewater. Cationic corn starch and cationic potato starch with a degree of substitution 1.34 and 0.82, respectively, were synthesized using 3-methacryloyl amino propyl trimethyl ammonium chloride and tested on Scenedesmus obliquus and lagoon wastewater. The zeta potential of the cationic starches tested over a pH range 5.0-10.0 showed an average of +16.0 and +15.1 mV for cationic corn starch and cationic potato starch, respectively. Total suspended solids removals of 90 and 85% were achieved with cationic corn starch and cationic potato starch, respectively, when tested with S. obliquus. Tests with wastewater showed total suspended solids removals of 80 and 60% for cationic corn starch and cationic potato starch, respectively. Total phosphorus removal values from wastewater were approximately 33, 29, and 42% for cationic corn starch, cationic potato starch, and alum, respectively, for a coagulant/algae ratio of 1.4 (wt/wt). These results indicate that cationic starch has the potential to replace alum for algae harvesting and wastewater treatment making it a suitable alternative to inorganic coagulants and flocculants.
机译：犹他州洛根市处理460英亩的兼性泻湖中的废水。这些泻湖中自然生长的藻类吸收养分并净化废水，但需要凝结和絮凝才能与废水分离。用3-甲基丙烯酰基氨基丙基三甲基氯化铵合成了取代度分别为1.34和0.82的阳离子玉米淀粉和阳离子马铃薯淀粉，并在斜球藻和泻湖废水中进行了测试。在5.0-10.0的pH范围内测试的阳离子淀粉的zeta电位显示，阳离子玉米淀粉和阳离子马铃薯淀粉的平均值分别为+16.0和+15.1 mV。用斜糖链球菌测试时，阳离子玉米淀粉和阳离子马铃薯淀粉分别实现了90％和85％的总悬浮固体去除。废水测试表明，阳离子玉米淀粉和阳离子马铃薯淀粉的总悬浮固体去除量分别为80％和60％。对于阳离子玉米淀粉，阳离子马铃薯淀粉和明矾，当混凝剂/藻类比为1.4（wt / wt）时，废水中的总磷去除率分别约为33％，29％和42％。这些结果表明，阳离子淀粉具有取代明矾的潜力，可用于藻类收获和废水处理，使其成为无机凝结剂和絮凝剂的合适替代品。

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