title: Facile sand enhanced electro-flocculation for cost-efficient harvesting of Dunaliella salina.
abstract: Energy consumption and water resource in the cultivation and harvesting steps still need to be minimized for the popularization of the microalgae-based products. An efficient electro-flocculation method for harvesting Dunaliella Salina integrated with local sand has been successfully applied. Sand was effective for speeding up the processes of flocculation and sedimentation of algal flocs and the electrolytic hydroxides was essential to bridge the sand and small flocs into large dense flocs. The maximal recovery effective improved from 95.13% in 6min to 98.09% in 4.5min and the optimal electrical energy consumption decreased 51.03% compared to conventional electro-flocculation in a laboratory ambient condition. Furthermore, reusing the flocculated medium in cultivation of the D. Salina with nitrogen supplemented performed no worse than using fresh medium. This sand enhanced electro-flocculation (SEF) technology provides a great potential for saving time and energy associated with improving microalgae harvesting.
authors: Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China.
authors: Qiong
authors: Q
authors: Xiong
authors: Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China.
authors: Qi
authors: Q
authors: Pang
authors: Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China.
authors: Xinwei
authors: X
authors: Pan
authors: Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China.
authors: A Okonkwo
authors: AO
authors: Chika
authors: Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China.
authors: Liqing
authors: L
authors: Wang
authors: Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China.
authors: Jia
authors: J
authors: Shi
authors: Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China.
authors: Lishan
authors: L
authors: Jia
authors: School of Life Sciences, and Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen 361102, Fujian, China; Shenzhen Research Institute, Xiamen University, Shenzhen 518057, China.
authors: Changping
authors: C
authors: Chen
authors: School of Life Sciences, and Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems, Xiamen University, Xiamen 361102, Fujian, China; Shenzhen Research Institute, Xiamen University, Shenzhen 518057, China.
authors: Yahui
authors: Y
authors: Gao
mesh_terms: D003362:Cost-Benefit Analysis; D004563:Electrochemistry / Q000379:methods*; D004735:Energy Transfer; D005427:Flocculation; D012987:Soil / Q000737:chemistry*; D019657:Solanaceae / Q000166:cytology* / Q000502:physiology*
chemical_list: D012987:Soil
keywords: Dunaliella Salina; Electro-flocculation; Zeta-potential