Electro-flotation of Chlorella sp assisted with flocculation by chitosan

doi:10.1016/j.algal.2016.05.029

QIBEBT-IR > 微藻生物技术研究组

	Electro-flotation of Chlorella sp assisted with flocculation by chitosan
	Zhou, Wenjun; Gao, Lili; Cheng, Wentao; Chen, Lin; Wang, Junfeng; Wang, Hui; Zhang, Wei; Liu, Tianzhong
	2016-09-01
发表期刊	ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
卷号	18 页码:7-14
摘要	Harvest of algal biomass from dilute culture medium at low cost remains a major hurdle to industrial scale processing. Conventional harvesting methods are not only costly, but also affect any later downstream processes partly because of the metal ions contamination by flocculants. This work constructed an electro-flotation technique including two steps of flocculation by chitosan first and then sequential bubbling flotation by non-sacrificial graphite electrodes. Laboratory work has been carried out to investigate the influences of chitosan dosage, pH value, cell density of algal culture, stirring rate and mixing time on flocculation efficiency, and the voltage and current intensity imposed on electrodes and the space between electrodes on flotation efficiency. Moreover, a 1000 L pilot bench of electro-flotator constructed to harvest Chlorella sp. was tested. Around 90% of total recovery efficiency and 50 times concentration rate have been reached, and only 23.7 g chitosan and 0.43 kWh of electricity are required to harvest 1 kg biomass. Above results proved electro-flotation by graphite electrodes assisted with chitosan is a safe and cost effective approach for microalgae harvesting. (C) 2016 Elsevier B.V. All rights reserved.
文章类型	Article
关键词	Chlorella Sp. Electro-flotation Chitosan Dosage Flocculation Efficiency Recovery Efficiency Cost Estimation
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
DOI	10.1016/j.algal.2016.05.029
关键词[WOS]	DISSOLVED AIR FLOTATION ; MICROALGAL BIOMASS ; POLARITY EXCHANGE ; ALGAE ; BUBBLE ; BIODIESEL ; RECOVERY ; REMOVAL ; MICROFLOTATION ; COAGULATION
收录类别	SCI
语种	英语
WOS研究方向	Biotechnology & Applied Microbiology
项目资助者	National High Technology Research and Development Program of China (863 plan)(2013AA065801 ; 2014AA022002)
WOS类目	Biotechnology & Applied Microbiology
WOS记录号	WOS:000381748800002
引用统计
文献类型	期刊论文
条目标识符	http://ir.qibebt.ac.cn/handle/337004/8432
专题	微藻生物技术研究组
作者单位	Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Key Lab Biofuel, Qingdao 266101, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Wenjun,Gao, Lili,Cheng, Wentao,et al. Electro-flotation of Chlorella sp assisted with flocculation by chitosan[J]. ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS,2016,18:7-14.
APA	Zhou, Wenjun.,Gao, Lili.,Cheng, Wentao.,Chen, Lin.,Wang, Junfeng.,...&Liu, Tianzhong.(2016).Electro-flotation of Chlorella sp assisted with flocculation by chitosan.ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS,18,7-14.
MLA	Zhou, Wenjun,et al."Electro-flotation of Chlorella sp assisted with flocculation by chitosan".ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS 18(2016):7-14.