scholarly journals Enhancement of microalgae growth using magnetic artificial cilia

Author(s):  
Thijn Verburg ◽  
Allison Schaap ◽  
Shuaizhong Zhang ◽  
Jaap den Toonder ◽  
Ye Wang
2021 ◽  
Vol 9 (7) ◽  
pp. 1496
Author(s):  
Rubiyatno ◽  
Kazuhiro Mori ◽  
Daisuke Inoue ◽  
Sunah Kim ◽  
Jaecheul Yu ◽  
...  

Euglena gracilis produces paramylon, which is a feedstock for high-value functional foods and nutritional supplements. The enhancement of paramylon productivity is a critical challenge. Microalgae growth-promoting bacteria (MGPB) can improve microalgal productivity; however, the MGPB for E. gracilis remain unclear. This study isolated bacteria capable of enhancing E. gracilis growth and paramylon production under mixotrophic conditions. Enterobacter sp. CA3 and Emticicia sp. CN5 were isolated from E. gracilis grown with sewage-effluent bacteria under mixotrophic conditions at pH 4.5 or 7.5, respectively. In a 7-day E. gracilis mixotrophic culture with glucose, CA3 increased E. gracilis biomass and paramylon production 1.8-fold and 3.5-fold, respectively (at pH 4.5), or 1.9-fold and 3.5-fold, respectively (at pH 7.5). CN5 increased E. gracilis biomass and paramylon production 2.0-fold and 4.1-fold, respectively (at pH 7.5). However, the strains did not show such effects on E. gracilis under autotrophic conditions without glucose. The results suggest that CA3 and CN5 promoted both E. gracilis growth and paramylon production under mixotrophic conditions with glucose at pH 4.5 and 7.5 (CA3) or pH 7.5 (CN5). This study also provides an isolation method for E. gracilis MGPB that enables the construction of an effective E. gracilis–MGPB-association system for increasing the paramylon yield of E. gracilis.


Author(s):  
Hayat Abdulla Yusuf ◽  
S. M. Zakir Hossain ◽  
Ahmed Ali Khamis ◽  
Hassan Tariq Radhi ◽  
Ahmed Salman Jaafar ◽  
...  

2018 ◽  
Vol 31 ◽  
pp. 03002 ◽  
Author(s):  
Hadiyanto Hadiyanto

Tofu industries produce waste water containing high organic contents and suspendid solid which is harmful if directly discharged to the environment. This waste can lead to disruption of water quality and lowering the environmental carrying capacity of waters around the tofu industries. Besides, the tofu waste water still contains high nitrogen contents which can be used for microalgae growth. This study was aimed to reduce the pollution load (chemical oxygen demand-COD) of tofue wastewater by using ozone treatments and to utilize nutrients in treated tofu waste water as medium growth of microalgae. The result showed that the reduction of COD by implementation of ozone treatment followed first order kinetic. Under variation of waste concentrations between 10-40%, the degradation rate constant was in the range of 0.00237-0.0149 min-1. The microalgae was able to grow in the tofue waste medium by the growth rate constants of 0.15-0.29 day-1. This study concluded that tofu waste was highly potent for microalgae growth.


2015 ◽  
Vol 9 (3) ◽  
pp. 034105 ◽  
Author(s):  
Chia-Yuan Chen ◽  
Ling-Ying Cheng ◽  
Chun-Chieh Hsu ◽  
Karthick Mani

2019 ◽  
Vol 285 ◽  
pp. 234-240 ◽  
Author(s):  
Chang-Hung Lu ◽  
Chien-Hsin Tang ◽  
Neha Ghayal ◽  
Bivas Panigrahi ◽  
Chia-Yuan Chen ◽  
...  
Keyword(s):  

2013 ◽  
Vol 10 (78) ◽  
pp. 20120666 ◽  
Author(s):  
Sina Sareh ◽  
Jonathan Rossiter ◽  
Andrew Conn ◽  
Knut Drescher ◽  
Raymond E. Goldstein

Cilia are used effectively in a wide variety of biological systems from fluid transport to thrust generation. Here, we present the design and implementation of artificial cilia, based on a biomimetic planar actuator using soft-smart materials. This actuator is modelled on the cilia movement of the alga Volvox , and represents the cilium as a piecewise constant-curvature robotic actuator that enables the subsequent direct translation of natural articulation into a multi-segment ionic polymer metal composite actuator. It is demonstrated how the combination of optimal segmentation pattern and biologically derived per-segment driving signals reproduce natural ciliary motion. The amenability of the artificial cilia to scaling is also demonstrated through the comparison of the Reynolds number achieved with that of natural cilia.


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