工艺条件对海水小球藻电解絮凝效果的影响  

Research on the major technical parameters of electrocoagulation for marine Chlorella vulgaris

作　　者：白晓磊[1] 邢立苹 姜忠爱[1] 母刚[1] 李秀辰[1] 

机构地区：[1]大连海洋大学辽宁省渔业装备工程技术研究中心,辽宁大连116023

出　　处：《渔业现代化》2015年第2期1-5,共5页Fishery Modernization

基　　金：辽宁省海洋与渔业厅项目"海洋微藻生态规模化栽培;采收与转化利用关键技术及装备(201304)"

摘　　要：为研究电解絮凝采收微藻的效果和工艺条件，研制了一套试验用电解絮凝采收微藻的设备，以采收率和浓缩倍数为指标，探索电解絮凝采收微藻的最佳工艺条件。在不同电极插入深度与藻液体积的比值、pH、极板间距、通电时间和极板电压条件下进行单因素试验，并在此基础上对pH、极板间距和极板电压3因素进行正交试验。单因素试验结果表明，当电极板插入深度与藻液体积的比值为22．0～37．5／m2、pH7．00～9．00、极板间距5．0～9．0cm、通电时间20—30min、极板电压12～14V时，较有利于小球藻的电解絮凝采收；正交试验结果表明，藻液pH对小球藻的电解絮凝作用显著，影响次序依次为藻液pH〉极板电压〉极板间距，最佳工艺条件为pH9．00、极板电压13V、极板间距5．0～7．0cm，采收率可达80％以上。A set of test equipment used for microalgae electrocoagulation was designed and developed, and the parameters of recovery ratio and enrich ratio were taken as indexes to find out the optimum technical paremeters for microalgae electrocoagulation. The single factor experiment was conducted under different ratio of electrode insertion depth and algae liquid volume, pH, electrode distance, electrolyzing time and electrolyzing voltage, and the orthogonal tests were carried out on three factors of pH, electrode distance and electrolyzing voltage based on the single factor experiment results. Results of single factor experiments showed that higher recovery of Chlorella vulgaris could be achieved when the ratio of electrode height and algae volume, pH, electrode distances, electrolyzing time and voltage were respectively set at 22.0 - 37.5 m -2, 7.00-9.00, 5.0- 9.0 era, 20- 30 rain and 12 -14 V. Results of orthogonal experiment showed that the effect of pH on electrocoagulation of Chlorella vulgaris was significant and the influence degree on Chlorella vulgaris removal followed the sequence of pH, electrolyzing voltage, electrode distance. So the optimal condition was pH of 9.00, electrolyzing voltage of 13V and electrode distance of 5.0 -7.0 cm, and the recovery ratio of Chlorella vulgaris reach more than 80%.

关 键 词：小球藻 电解絮凝 采收率 浓缩倍数 工艺条件 

分 类 号：S216.2[农业科学—农业机械化工程] TK6[农业科学—农业工程]