Paper Title:
Harvesting Microalgae Biomass by Instant Dissolved Air Flotation at Batch Scale
  Abstract

A instant air dissolution flotation method was used to harvest microalgal cells from culture to evaluate its feasibility. Effects of microalgae cell density, coagulant dosage, flocculant dosage, surfactant dosage and duration of air dissolution on recovery rate were studied by orthogonal experiment. The results show that the optimal recovery rate reaches 89.57% under one of the test combination conditions. The factors can be ordered by coagulant dosage, cell density, flocculant dosage, air dissolution duration and surfactant dosage according to their effect degree on recovery rate, and coagulant dosage, cell density were the marked factors when confidence level was given as 90%. Under test conditions, recovery rate rides up when the coagulant dosage increase, and the optimal dose of flocculant appears at 20 mg·L-1. As seawater medium contains salts which own the similar fuction like surfactant, surfactant do not affect the recovery rate significantly. The time of air dissolution should not be too long, a 2-second duration is enough to providing dissolved air, and the recovery rate may reduce because of the disturbance induced by the redundant air.

  Info
Periodical
Advanced Materials Research (Volumes 236-238)
Edited by
Zhong Cao, Yinghe He, Lixian Sun and Xueqiang Cao
Pages
146-150
DOI
10.4028/www.scientific.net/AMR.236-238.146
Citation
Z. Lin, Y. L. Kuang, Y. W. Leng, "Harvesting Microalgae Biomass by Instant Dissolved Air Flotation at Batch Scale", Advanced Materials Research, Vols. 236-238, pp. 146-150, 2011
Online since
May 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Bin Li, Wei Fang Ma, Hui Wang, Fan Gang Zeng, Chuan Feng Deng, Hai Tao Fan
Chapter 5: Frontiers of Environment Engineering and Materials
Abstract:This paper studied Beijing sanitary wastewater and investigated phosphorus removal effect and related factors under PFS and polyacrylamide...
3219
Authors: Chao Li, Xiao Yan Zhang, Jun Liang Liu, Ding Ding
Chapter 9: Water Supply and Drainage Engineering
Abstract:In this study, we treat rural domestic sewage with the mixture of diatomite and three kinds of coagulant. The result shows that with three...
2153
Authors: Long Chen, Gui Fu Zheng, De Chao Ran
Chapter 11: Environmental. Research, Friendly Materials and Recycling Waste Technologies
Abstract:Coagulation-flocculation process as an important water treatment technology has been widely used in the water treatment plant. The technology...
1688
Authors: Ji Ku Zhang, Yan Bin Yang, Hui Ye Wang, Zhi Biao Dong
Chapter 7: Environmental Engineering and Environmental Protection
Abstract:CFU combined process is the Coagulation - Flotation - Ultrafiltration combined process.For the car washing wastewater with litter oil, this...
999
Authors: Lei Cheng, Yan Zhen Yu, Juan Tan, Yong Sun
Chapter 5: Environmental Restoration Engineering, Treatment and Removal Technologies and Processes
Abstract:High ferric-based silicon coagulant is a kind of new self-made coagulant. The high ferric content was introduced in the preparation process...
1389