Cultivation of Scenedesmus obliquus and Chlorella pyrenoidosa in Municipal Wastewater Using Monochromatic and White LED as Light Sources

2021 ◽  
Author(s):  
Zhongqi He ◽  
Wei Han ◽  
Wenbiao Jin ◽  
Jing Yang ◽  
Shuhong Gao ◽  
...  
Keyword(s):  
Municipal Wastewater ◽  
Scenedesmus Obliquus ◽  
Chlorella Pyrenoidosa ◽  
Light Sources ◽  
White Led

scholarly journals Primitive techno-economic study of bio-diesel and bio-active compound production from microalgae

2020 ◽  
Vol 44 (1) ◽  
Author(s):  
Sayeda M. Abdo ◽  
Guzine I. El Diwani ◽  
Kamel M. El-Khatib ◽  
Sanaa A. Abo El-Enin ◽  
Mohammed I. El-Galad ◽  
...  
Keyword(s):  
Active Compound ◽  
Municipal Wastewater ◽  
Scenedesmus Obliquus ◽  
Cetane Number ◽  
Treatment Plant ◽  
Acid Methyl Ester ◽  
Biodiesel Production ◽  
High Rate ◽  
Total Phenolic ◽  
Microscopical Examination

Abstract Background Microalgae cells can be identified as a potential source for new and renewable energy. The economic investigation for biodiesel and bio-active compound production from the microalgae community (Bloom), which are collected from the high rate algal pond (HRAP) constructed to treat municipal wastewater at Zenin wastewater treatment plant, Giza, was the main target of study. Results The microscopical examination showed that Scenedesmus obliquus is the dominant species. The total carotenoids were extracted using jojoba oil and determined by high-performance liquid chromatography (HPLC) to reach 81.44 μg/g. The biodiesel production through acid transesterification reaction recorded 70.6% of fatty acid methyl ester content with high cetane number (44) and low acid value. Such results prove that the obtained biodiesel has better ignition quality. The total phenolic and flavonoid compounds have been derived from the remaining biomass to give 5.36 ± 0.03 and 1.50 ± 0.19 mg/g respectively. Finally, total proteins and carbohydrates content in algal cells were recorded 54.3 and 1.5 mg/g successively Conclusion The preliminary economic evaluation showed that the production of biodiesel and carotenoids from the microalgae growing in municipal wastewater can be considered, as a techno-economic feasible process.

CO2 biofixation and fatty acid composition of Scenedesmus obliquus and Chlorella pyrenoidosa in response to different CO2 levels

2011 ◽  
Vol 102 (3) ◽  
pp. 3071-3076 ◽  
Author(s):  
Dahai Tang ◽  
Wei Han ◽  
Penglin Li ◽  
Xiaoling Miao ◽  
Jianjiang Zhong
Keyword(s):  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Acid Composition ◽  
Scenedesmus Obliquus ◽  
Chlorella Pyrenoidosa ◽  
Co2 Biofixation ◽  
Co2 Levels

Highway Tunnel Lighting Research Based on Mesopic Vision

2011 ◽  
Vol 71-78 ◽  
pp. 4061-4064
Author(s):  
Yong Yang ◽  
Chuan Zheng Zhu ◽  
Lei Wang
Keyword(s):  
Reaction Time ◽  
Design Method ◽  
B Value ◽  
Light Sources ◽  
White Led ◽  
Mesopic Vision ◽  
Highway Tunnel ◽  
Function Fitting ◽  
Sodium Lamp ◽  
High Pressure Sodium Lamp

The white LED and high-pressure sodium lamp (HPS) are used to simulate highway tunnel lighting under different background brightness (abbreviated as B) conditions, from a series of reaction time tests, the result shows that white LED can provide shorter reaction time for observers compared with HPS, further research suggests under the mesopic vision, different kinds of light sources maybe have unlike brightness, although which is identical under the photopic vision. From the luminous spectrum test and mesopic vision spectral luminous efficiency function fitting calculation, the mesopic equivalent brightness can be determined with certain light source and B value. This conclusion would provide a more accurate and lower energy consumption lighting design method for highway tunnel.

The Chromaticity Shift of White-LED Light Sources Passing through Fog

2013 ◽  
Author(s):  
Chiu-Chung Yang ◽  
Chien-Sheng Huang ◽  
Ching-Huang Lin ◽  
Chien-Yue Chen ◽  
Shao-Ciang Gan
Keyword(s):  
Light Sources ◽  
White Led ◽  
Led Light

scholarly journals Characterising user preference for white LED light sources with CIE colour rendering index combined with a relative gamut area index

2016 ◽  
Vol 49 (4) ◽  
pp. 461-480 ◽  
Author(s):  
C Teunissen ◽  
FHFW van der Heijden ◽  
SHM Poort ◽  
E de Beer
Keyword(s):  
User Preference ◽  
Light Sources ◽  
White Led ◽  
Area Index ◽  
Led Light ◽  
Colour Rendering
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