Enhanced Microalgae Harvesting in a Microfluidic Centrifugal Separator

2021 ◽  
Author(s):  
Rohan Sharma ◽  
Myeongsub Kim
Keyword(s):  
Centrifugal Separator ◽  
Microalgae Harvesting

Microalgae Harvesting in a Microfluidic Centrifugal Separator for Enchanced Biofuel Production

2021 ◽  
Author(s):  
Myeongsub "Mike" Kim ◽  
Rohan Sharma ◽  
Tahir Farrukh ◽  
Scott Shirley ◽  
Mohammadhassan Kavosi
Keyword(s):  
Biofuel Production ◽  
Centrifugal Separator ◽  
Microalgae Harvesting

Microalgae Harvesting in a Microfluidic Centrifugal Separator for Enchanced Biofuel Production

2021 ◽  
Author(s):  
Myeongsub "Mike" Kim ◽  
Rohan Sharma ◽  
Tahir Farrukh ◽  
Scott Shirley ◽  
Mohammadhassan Kavosi
Keyword(s):  
Biofuel Production ◽  
Centrifugal Separator ◽  
Microalgae Harvesting

Microalgae Harvesting in a Microfluidic Centrifugal Separator for Enhanced Biofuel Production

2020 ◽  
Author(s):  
Rohan Sharma ◽  
Scott Shirley ◽  
Tahir Farrukh ◽  
Mohammadhassan Kavosi ◽  
Myeongsub Kim
Keyword(s):  
Fossil Fuels ◽  
Biofuel Production ◽  
Separation Performance ◽  
Centrifugal Separator ◽  
Renewable Energy Resources ◽  
Multiple Parameters ◽  
Microalgae Harvesting ◽  
Microalgal Biodiesel ◽  
Low Performance ◽  
Spiral Microchannel

Abstract Biofuel is one of the renewable energy resources alternatives to fossil fuels [1]. Among various sources for biofuels, microalgae provide at least three-orders-of-magnitude higher production rate of biodiesel at a given land area than conventional crop-based methods. However, microalgal biodiesel still suffers from significantly lower harvesting performance, making such a fuel less competitive. To increase the separation performance of microalgae from cultivation solution, we used a spiral microchannel that enables the isolation of biofuel-algae particles from water and contaminants contained in the culturing solution. Our preliminary data show that separation performance in the microfluidic centrifugal separator is as high as 88% within a quick separation time of 30 seconds. To optimize separation performance, multiple parameters of algae behaviors and separation techniques were studied and were manipulated to achieve better performance. We found that changing these factors altered the separation performance by increasing or decreasing flocculation, or “clumping” of the microalgae within the microchannels. The important characteristics of the separator geometry, fluid properties, and environmental conditions on algae separation was found and will be further studied in the forthcoming tests. This introductory study reveals that there is an opportunity to improve the currently low performance of algae separation in centrifugal systems using much smaller designs in size, ensuring a much more efficient algae harvesting.

scholarly journals Bio-Flocculation Property Analyses of Oleaginous Microalgae Auxenochlorella protothecoides UTEX 2341

2021 ◽  
Vol 13 (5) ◽  
pp. 2885
Author(s):  
Jinyu Li ◽  
Baozhen Li ◽  
Jinshui Yang
Keyword(s):  
Large Scale ◽  
Municipal Wastewater ◽  
Biofuel Production ◽  
Microalgae Harvesting ◽  
Flocculation Efficiency ◽  
Oleaginous Microalgae ◽  
Freeze Dried ◽  
Flocculation Ability ◽  
Powder Samples ◽  
Auxenochlorella Protothecoides

The bio-flocculation ability of UTEX 2341 was studied for the purpose of improving microalgae harvesting efficiency to cut the high cost of biofuel production. The algae cells of UTEX 2341 cultured under heterotrophic and municipal wastewater conditions were found to have better self-flocculation ability, with flocculation rates of 92% and 85% at 2 h, respectively. Moreover, the flocculation rates of 16 freeze-dried microalgae powder samples cultured under different stress conditions were 0~72% with an algae powder dosage of 35 mg L−1. The flocculation efficiency of DIM, DCd1, DT28, and L6S was stable under different pH of 3~9 and temperatures of 15~50 °C. For samples of IM, LCd0.6, LMn2, and LZn2, the flocculation efficiency decreased or increased respectively with increased pH or temperatures. Though the flocculation properties of the eight samples showed wide differences, their flocculant compositions were almost the same with unknown components occupying large proportions. More studies needed to be further carried out to reveal the flocculation mechanisms and analyze the flocculation abilities in practical application, which would be conducive to future large-scale application of the bio-flocculation method and also cost reduction.

Microalgae harvesting technique using ballasted flotation: A review

2021 ◽  
pp. 119439
Author(s):  
Kaiwei Xu ◽  
Xiaotong Zou ◽  
Wenjuan Chang ◽  
Yanhui Qu ◽  
Yanpeng Li
Keyword(s):  
Microalgae Harvesting ◽  
Harvesting Technique

Experimental and Numerical Investigation of Air-Particle Two-Phase Flow in Centrifugal Separator

2000 ◽  
Author(s):  
H. J. Kang ◽  
B. Zheng ◽  
C. X. Lin ◽  
M. A. Ebadian
Keyword(s):  
Velocity Distribution ◽  
Separation Efficiency ◽  
Three Dimensional ◽  
Vertical Direction ◽  
Tangential Direction ◽  
Cylinder Surface ◽  
Centrifugal Separator ◽  
Two Phase ◽  
Dust Collection ◽  
Numerical Solver

Abstract The velocity distributions inside a centrifugal separator with outside and inside diameters of 152.4 mm (6″) and 76.2 mm (3″), respectively, have been investigated experimentally and numerically to obtain optimum separation efficiency. Two 12.7 mm (1/2-inch) holes were drilled on the external surface of the separator to measure the velocity distribution in the separator. Two direction velocities (tangential direction along the cylinder surface and axial along the vertical direction) were measured to compare with the numerical simulation results. A 6060P Pitot probe was employed to obtain the velocity distribution. The dust samples (a mixture of steel particle and dust) from the dust collection box were analyzed using a Phillips XL30 Scanning Electron Microscope. FLUENT code is used as the numerical solver for this fully three-dimensional problem. The fluid flow in the separator is assumed to be steady and incompressible turbulent flow. The standard k–ε model was employed in this study. Non-uniform, unstructured grids are chosen to discretize the entire computation domain. Almost 100,000 cells are used to discretize the whole separator. The constant velocity profile is imposed on the inlet plane. The pressure boundary condition is adopted at outlet plane. Comparing the velocity distribution and separation efficiency from the experiment and the numerical modeling shows that the experimental results and the estimated data agree fairly well and with a deviation within ±10%.

Microalgae harvesting and subsequent biodiesel conversion

2013 ◽  
Vol 140 ◽  
pp. 179-186 ◽  
Author(s):  
Dang-Thuan Tran ◽  
Bich-Hanh Le ◽  
Duu-Jong Lee ◽  
Ching-Lung Chen ◽  
Hsiang-Yu Wang ◽  
...  
Keyword(s):  
Microalgae Harvesting
Sign in / Sign up

Export Citation Format

Share Document