Flocculation of chlorella by composite of modified starch and attapulgite

doi:10.16085/j.issn.1000-6613.2015.05.041

Chemical Industry and Engineering Progree ›› 2015, Vol. 34 ›› Issue (05): 1433-1439.DOI: 10.16085/j.issn.1000-6613.2015.05.041

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Flocculation of chlorella by composite of modified starch and attapulgite

DONG Rui¹, WANG Yuan^1,2, LIU Tingting^1,3

1. School of Chemical and Biological Engineering, Yancheng Institute of Technology, Yancheng 224051, Jiangsu, China;
2. School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, China;
3. School of Pharmacy, Nantong University, Nantong 226361, Jiangsu, China

Received:2014-10-15 Revised:2014-11-18 Online:2015-05-05 Published:2015-05-05

改性阳离子淀粉-凹凸棒土复合絮凝剂絮凝采收小球藻

董锐¹, 王元^1,2, 刘婷婷^1,3

1. 盐城工学院化学与生物工程学院, 江苏盐城 224051;
2. 安徽理工大学化学工程学院, 安徽淮南 232001;
3. 南通大学药学院, 江苏南通 226361

通讯作者: 董锐(1967—),女,硕士,副教授,研究方向为高分子絮凝剂、聚合膜等.E-maildongr@ycit.cn.
作者简介:董锐(1967—),女,硕士,副教授,研究方向为高分子絮凝剂、聚合膜等.E-maildongr@ycit.cn.
基金资助:
江苏省科技厅产学研联合创新基金资助(BY2013057-01),江苏省环保厅环保科研课题2013024)项目.

Abstract

Abstract: Cationic starch-dimethyl diallylammonium chloride (CS-DMDAAC)/attapulgite is a new composite flocculant. It is used in the flocculation and recovery process of chlorella and has a much more broader application prospect in environmental protection,chemical engineering and material industry. In this paper,CS-DMDAAC copolymer was selected by comparing CS-DMDAAC with cationicstarch (CS) in terms of the flocculating effects on chlorella,and then this composite starch was blended with attapulgite at a specific ratio. The effect of pH,ratio of CS-DMDAAC/ attapulgite,dosage of composite starch and deposition time on the flocculation rate of chlorella was discussed. On the basis of single factor experiment,the flocculation process of CS-DMDAAC/ attapulgite on chlorella was optimized by means of orthogonal test. The shape of attapulgite,CS-DMDAAC/attapulgite and the mixture of composite flocculant and chlorella were analyzed by scanning electron microscopy(SEM). The optimal conditions were:pH=9,CS-DMDAAC/attapulgite ratio in flocculant 1:9,dosage of composite starch 0.04g and deposition time 210 min. Parallel experiments were made under the optimal conditions,and flocculation rate of chlorella was up to 99.1%. The results of this paper could provide valuable reference for modifications of CS-DMDAAC and recovery of alga.

Key words: cationicstarch, dimethyl diallylammonium chloride, attapulgite, compound, flocculate

摘要： 二元接枝改性阳离子淀粉(CS-DMDAAC)/凹凸棒土是一种新型复合絮凝剂,用于小球藻的絮凝采收环节,在环保、化工、材料等领域具有更广阔的应用前景.为提高小球藻的絮凝采收率,通过单因素实验考察阳离子淀粉(CS)和CS-DMDAAC对小球藻的絮凝效果,并对CS-DMDAAC与凹凸棒土进行复配,通过单因素实验探讨了pH值、CS-DMDAAC/凹凸棒土复配比、阳离子淀粉投加量及沉降时间对小球藻絮凝率的影响,在单因素实验的基础上,以正交试验法优化CS-DMDAAC/凹凸棒土对小球藻的絮凝工艺.用扫描电镜(SEM)对凹凸棒土、CS-DMDAAC/凹凸棒土和CS-DMDAAC/凹凸棒土吸附小球藻进行表征,实验结果表明最佳絮凝工艺条件为:pH=9,CS-DMDAAC/凹凸棒土复配比为1:9,阳离子淀粉投加量为0.04g,沉降时间为210min.在该条件下进行平行实验,对小球藻的絮凝率最高达到99.1%.研究结果对CS-DMDAAC的改性以及藻类的絮凝采收具有参考价值.

关键词: 阳离子淀粉, 二甲基二烯丙基氯化铵(DMDAAC), 凹凸棒土, 复配, 絮凝

CLC Number:

TQ314.22

DONG Rui, WANG Yuan, LIU Tingting. Flocculation of chlorella by composite of modified starch and attapulgite[J]. Chemical Industry and Engineering Progree, 2015, 34(05): 1433-1439.

董锐, 王元, 刘婷婷, . 改性阳离子淀粉-凹凸棒土复合絮凝剂絮凝采收小球藻[J]. 化工进展, 2015, 34(05): 1433-1439.

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Flocculation of chlorella by composite of modified starch and attapulgite

改性阳离子淀粉-凹凸棒土复合絮凝剂絮凝采收小球藻

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