文献类型：期刊文献

中文题名：Synthesis and characterization of a starch-based cationic flocculant for microalgae harvesting

英文题名：Synthesis and characterization of a starch-based cationic flocculant for microalgae harvesting

作者：Cheng Yanling[1,2,3];Hua Wei[1];Liu Wenhui[1];Wang Wanqing[1];Ye Xiao[1];Li Liang[2,3];Paul Cheng[2,3];Roger Ruan[2,3]

第一作者：程艳玲;Cheng Yanling

通讯作者：Roger, R[1]

机构：[1]Beijing Union Univ, Biochem Engn Coll, Beijing Key Lab Biomass Waste Resource Utilizat, Beijing 100023, Peoples R China;[2]Univ Minnesota, Ctr Biorefining, 1390 Eckles Ave, St Paul, MN 55108 USA;[3]Univ Minnesota, Dept Bioprod & Biosyst Engn, 1390 Eckles Ave, St Paul, MN 55108 USA

第一机构：北京联合大学生物化学工程学院

通讯机构：[1]corresponding author), 1390 Eckles Ave, St Paul, MN 55108 USA.

年份：2016

卷号：9

期号：3

起止页码：139-145

中文期刊名：国际农业与生物工程学报（英文）

外文期刊名：INTERNATIONAL JOURNAL OF AGRICULTURAL AND BIOLOGICAL ENGINEERING

收录：;Scopus(收录号：2-s2.0-84996489735);WOS:【SCI-EXPANDED(收录号:WOS:000378668600015)】；PubMed;

基金：This program was supported by Beijing Municipal Education Commission (program No.: KZ201411417038); Ministry of Science and Technology, China 863 Plan (No: 2014AA022002, 2015AA020200); International cooperation program (No.: 2014DFA61040, 2015DFA60170).

语种：英文

中文关键词：microalgae;harvest;flocculation;starch-based cationic flocculants

外文关键词：microalgae; harvest; flocculation; starch-based cationic flocculants

摘要：A process for making a starch-based cationic flocculant for microalgae harvest was studied and the performance of the flocculant was evaluated.The substituted cationic starch was prepared by reacting corn starch with glycidyltrimethylammonium chloride(GTAC),during which the hydroxyl groups of anhydroglucose units of the starch were partially substituted by the ammonium groups through etherification.The factors affecting degree of substitution(DS),such as reaction temperature and time,catalyst amount,and the water content were investigated and optimal reaction conditions were determined.The relationship between DS and microalgae harvest was determined.A batch of cationic starch with optimal DS was synthesized and used for flocculation experiments.The flocculation experiment results showed that,for the original microalgae concentration(dry weight)of 1 g/L,the cationic starch-based flocculants can harvest over 90%of the microalgae in pH from 5 to 10,with the aggregation and precipitation time of 10 min to 30 min,and the mass ratios of flocculants to microalgae of 1:8-1:18(dry mass ratio).Using starch-based flocculant to harvest microalgae in the effluent is not only efficient,but also nontoxic to the water system,which is very important to the effluent reuse and certain microalgae applications.
A process for making a starch-based cationic flocculant for microalgae harvest was studied and the performance of the flocculant was evaluated. The substituted cationic starch was prepared by reacting corn starch with glycidyltrimethylammonium chloride (GTAC), during which the hydroxyl groups of anhydroglucose units of the starch were partially substituted by the ammonium groups through etherification. The factors affecting degree of substitution (DS), such as reaction temperature and time, catalyst amount, and the water content were investigated and optimal reaction conditions were determined. The relationship between DS and microalgae harvest was determined. A batch of cationic starch with optimal DS was synthesized and used for flocculation experiments. The flocculation experiment results showed that, for the original microalgae concentration (dry weight) of 1 g/L, the cationic starch-based flocculants can harvest over 90% of the microalgae in pH from 5 to 10, with the aggregation and precipitation time of 10 min to 30 min, and the mass ratios of flocculants to microalgae of 1:8-1:18 (dry mass ratio). Using starch-based flocculant to harvest microalgae in the effluent is not only efficient, but also nontoxic to the water system, which is very important to the effluent reuse and certain microalgae applications.