Effects of extracellular organic matter on chitosan coagulation-microfiltration harvesting of Microcystis flos-aquae

doi:10.1016/j.seppur.2022.120548

	Effects of extracellular organic matter on chitosan coagulation-microfiltration harvesting of Microcystis flos-aquae
	Zang, Xiaomiao 1,2; Zhang, Shi 3; Li, Lili 1,4; Wang, Gaohong 1; Zhang, Haiyang 1; Zhang, Xuezhi 1
	2022-04-15
发表期刊	SEPARATION AND PURIFICATION TECHNOLOGY
ISSN	1383-5866
卷号	287 页码:7
通讯作者	Zhang, Haiyang([email protected]) ; Zhang, Xuezhi([email protected])
摘要	Extracellular organic matter (EOM) is considered an important cause of membrane fouling when harvesting Microcystis cells using filtration technology. Coagulation pre-treatment has increasingly been applied as an effective method to alleviate membrane fouling. However, the effects and mechanisms of EOM on coagulationmicrofiltration of Microcystis cells remain unclear. This study investigated the coagulation-microfiltration performance of EOM-free and EOM-containing Microcystis flos-aquae and explored the effect mechanisms of EOM from the perspective of floc characteristics and deposited algal cake structure. The results showed that the presence of EOM decreased the average flux from 4256.4 L/(m(2).h) to 3378.4 L/(m(2).h) at the optimal chitosan dosage of 15.11 mg/g. Electrostatic adsorption and/or bridging between carboxyl and amino/hydroxyl groups in EOM and chitosan resulted in a loose floc structure and high compressibility of the cake layer, thus reducing the filtration performance. In addition, interception of EOM in the cake layer contributed to membrane fouling during coagulation-microfiltration. These results revealed the mechanism by which EOM hinders coagulation filtration performance, which would be helpful for the development of efficient coagulation-filtration-based microalgal harvesting techniques.
关键词	Microcystis flos-aquae Extracellular organic matter Filtration flux Floc characteristics Algal cake structure
DOI	10.1016/j.seppur.2022.120548
收录类别	SCI
语种	英语
资助项目	National Program on Basic Research Project for Governmental International Scientific and Technological Innovation Cooperation of China[2018YFE0110600]; Features Institute Service Projects from the Institute of Hydrobiology[Y85Z061601]; National Natural Science Foundation of-China[51909258]
WOS研究方向	Engineering
WOS类目	Engineering, Chemical
WOS记录号	WOS:000781386100006
出版者	ELSEVIER
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/178889
专题	海洋生态与环境科学重点实验室
通讯作者	Zhang, Haiyang; Zhang, Xuezhi
作者单位	1.Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China 3.Changjiang Inst Survey Planning Design & Res, Wuhan 430010, Hubei, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
第一作者单位	海洋生态与环境科学重点实验室
推荐引用方式 GB/T 7714	Zang, Xiaomiao,Zhang, Shi,Li, Lili,et al. Effects of extracellular organic matter on chitosan coagulation-microfiltration harvesting of Microcystis flos-aquae[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2022,287:7.
APA	Zang, Xiaomiao,Zhang, Shi,Li, Lili,Wang, Gaohong,Zhang, Haiyang,&Zhang, Xuezhi.(2022).Effects of extracellular organic matter on chitosan coagulation-microfiltration harvesting of Microcystis flos-aquae.SEPARATION AND PURIFICATION TECHNOLOGY,287,7.
MLA	Zang, Xiaomiao,et al."Effects of extracellular organic matter on chitosan coagulation-microfiltration harvesting of Microcystis flos-aquae".SEPARATION AND PURIFICATION TECHNOLOGY 287(2022):7.

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