Radiation characteristics of Botryococcus braunii, Chlorococcum littorale, and Chlorella sp. used for fixation and biofuel production

2009 ◽  
Vol 110 (17) ◽  
pp. 1879-1893 ◽  
Author(s):  
Halil Berberoglu ◽  
Pedro S. Gomez ◽  
Laurent Pilon
Keyword(s):  
Botryococcus Braunii ◽  
Biofuel Production ◽  
Radiation Characteristics ◽  
Chlorella Sp

Radiation Characteristics of Promising Algae for CO2 Fixation and Biofuel Production

2009 ◽  
Author(s):  
Halil Berberog˘lu ◽  
Pedro S. Gomez ◽  
Laurent Pilon
Keyword(s):  
Cross Section ◽  
Co2 Fixation ◽  
Life Support ◽  
Botryococcus Braunii ◽  
Biofuel Production ◽  
Chlorophyll B ◽  
Radiation Characteristics ◽  
Chlorella Sp ◽  
Scattering Phase ◽  
Scattering Phase Function

This paper reports experimental measurements of the radiation characteristics of green algae used for carbon dioxide fixation via photosynthesis. Particular attention was paid to three widely used species namely Botryococcus braunii, Chlorella sp., and Chlorococcum littorale. Their extinction and absorption coefficients were obtained from normal-normal and normal-hemispherical transmittance measurements over the spectral range from 400 to 800 nm. Moreover, a polar nephelometer is used to measure the scattering phase function of the microorganisms at 632.8 nm. It was observed that for all strains, scattering dominates over absorption. The magnitudes of the extinction and scattering cross-section are functions of the size, shape, and chlorophyll content of each strains in a non-trivial manner. Absorption peaks at 435, 475, and 676 nm corresponding to chlorophyll a and chlorophyll b have been clearly identified in the three species considered. The results can be used for scaling and optimization of CO2 fixation in ponds or photobioreactors as well as in the development of controlled ecological life support systems.

Enhancement of Hydrocarbon Productivity of Botryococcus braunii by an Adenine Type Phytohormone

2012 ◽  
Vol 512-515 ◽  
pp. 397-400
Author(s):  
Jun Zhi Liu ◽  
Ya Ming Ge ◽  
Guang Ming Tian
Keyword(s):  
Growth Rate ◽  
Low Dose ◽  
Algal Growth ◽  
Botryococcus Braunii ◽  
Biofuel Production ◽  
Carotenoid Content ◽  
Algae Biofuels ◽  
Hydrocarbon Content ◽  
Algal Growth Rate ◽  
Hydrocarbon Productivity

This study examined the effects of an adenine-type cytokinin 6-benzylaminopurine (6-BA) on the growth and metabolism characteristics of Botryococcus braunii, one of the most promising oil-rich algae for biofuel production. The results showed that 6-BA of low dose (0.1-1.0 mg L-1) would enhance the algal growth rate and biochemical synthesis, whereas too much (5.0 mg L-1) would be lethally toxic for B. braunii. Noticingly, though the maximum algal growth rate, chlorophyll and β-carotenoid content were observed in the treatment with 0.5 and/or 1.0 mg L-1 6-BA, both the maximum algal hydrocarbon content and the highest hydrocarbon productivity were observed in the treatment with 0.1 mg L-1 6-BA, which were respectively 2.45 and 3.48 times of the control (39.1% vs. 16.0%, 546 mg L-1 vs. 157 mg L-1). This finding has great implications for improving algae biofuels production by phytohormone.

Algal biofuel production coupled bioremediation of biomass power plant wastes based on Chlorella sp. C2 cultivation

2018 ◽  
Vol 211 ◽  
pp. 296-305 ◽  
Author(s):  
Hui Chen ◽  
Jie Wang ◽  
Yanli Zheng ◽  
Jiao Zhan ◽  
Chenliu He ◽  
...  
Keyword(s):  
Power Plant ◽  
Biofuel Production ◽  
Algal Biofuel ◽  
Chlorella Sp ◽  
Biomass Power Plant

Flocculation with Chitosan of Microalgae Native of the Colombian Plateau. (Floculación con quitosano de las microalgas nativas de la altillanura Colombiana.)

2015 ◽  
Vol 6 (1) ◽  
pp. 25 ◽  
Author(s):  
L. M. Moreno ◽  
E. Muñoz Prieto ◽  
H. Casanova
Keyword(s):  
Zeta Potential ◽  
Chitosan Solution ◽  
Biofuel Production ◽  
Freshwater Microalgae ◽  
Chlorella Sp ◽  
Flocculation Efficiency ◽  
Effects Of Ph

AbstractMicroalgae are an attractive feedstock for biofuel production. Low harvesting cost upholds the use offlocculation as initial dewatering step. Two freshwater microalgae (Chlorella sp. and Scenedesmus sp.)native from the Colombian plateau, with low/medium biomass concentrations, were selected for this study. The effects of pH, Z-potential and flocs size in dictating the behavior of chitosan as flocculant, were evaluated. This study found that the optimal flocculation efficiency of microalgae was determined at pH 7.0, besides the zeta-potential was positively correlated with the flocculant dose. The zeta-potential increases positively with a flocculant dose. The Chlorella sp. is smaller than the Scenedesmus sp. but requires a little more dose of flocculant, this aspect is due to the nature of the flocculant solution and not the size of the studied microalgae. It was observed that for Chlorella sp., chitosan coagulation shifted the flocs size from 2-4 μm to 70-80 μm, with 1.0 ml of the 40 ppm chitosan solution. The flocculation with chitosan can yield compact flocs and accelerate the settling. For Scenedesmus sp. the flocs size was shifted from 3-4 μm to 60-70 μm and less percentage in the flocs volume. Flocculation response of the microalga Scenedesmus sp. is different in comparison to that of Chlorella. The flocculant dose required is greater, although the percentage of flocculation is also higher and the flocs size is only slightly larger. Further work is needed to confirm these observations. ResumenLas microalgas son unas atractivas cepas de pienso para la producción de biocombustibles. Los bajos costos para cosecharlas, soportan el uso de la floculación como paso inicial para la extracción del agua. Dos tipos de microalgas de aguas frescas: Chlorella sp., Scenedesmus sp., nativas de la meseta colombiana, con una concentración de biomasa baja/media, fueron seleccionadas para este estudio. Se evaluaron los efectos potenciales del pH, Z y los tamaños de los flóculos, en la determinación del quitosano como floculante. Este estudio halló que la eficiencia óptima para la floculación de las microalgas se logra con un pH 7.0, además, el potencial zeta fue correlacionado positivamente con una dosis del floculante. La Chlorella sp., es menor que la Scenedesmus sp., pero requiere una dosis un poco mayor de floculante, este aspecto se debe a la naturaleza de la solución floculante y no al tamaño de las microalgas estudiadas. Se observó que para la Chlorella sp., la coagulación del quitosano cambiaba los tamaños de las madejas, de 2-4 µm a 70-80 µm, con 1.0 ml de la solución de quitosano 40 ppm. La floculación con quitosano puede producir flocs compactos para una operación más rápida. Para la Scenedesmus sp., las dimensiones de los flóculos cambiaron de 3-4 µm a 60-70 µm y menor porcentaje en el volumen de los flocs. La respuesta de floculación de la microalga Scenedesmus sp., es diferente a la Chlorella. La dosis requerida de floculante es mayor, aunque el porcentaje de floculación es más elevado y las dimensiones de los flóculos solo son un poco mayores. Se requiere más trabajo para confirmar estas observaciones. 

High pH-induced flocculation of marine Chlorella sp. for biofuel production

2015 ◽  
Vol 28 (2) ◽  
pp. 747-756 ◽  
Author(s):  
Fangfang Yang ◽  
Wenzhou Xiang ◽  
Jiewei Fan ◽  
Hualian Wu ◽  
Tao Li ◽  
...  
Keyword(s):  
Biofuel Production ◽  
High Ph ◽  
Chlorella Sp

Biofuel production and phycoremediation by Chlorella sp. ISTLA1 isolated from landfill site

2018 ◽  
Vol 253 ◽  
pp. 121-129 ◽  
Author(s):  
Arti Mishra ◽  
Kristina Medhi ◽  
Neha Maheshwari ◽  
Shaili Srivastava ◽  
Indu Shekhar Thakur
Keyword(s):  
Landfill Site ◽  
Biofuel Production ◽  
Chlorella Sp

scholarly journals Development of Sustainable Phycoremediation With the Help of Chlorella Pyrenoidosa for Textile Wastewater Analysis Using Response Surface Methodology

2020 ◽  
Author(s):  
Shubhangi Mishra ◽  
Pradeep Kumar Srivast ◽  
Virendra Singh ◽  
Monika Sharma
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Biomass Productivity ◽  
Textile Wastewater ◽  
Optimal Growth ◽  
Chlorella Pyrenoidosa ◽  
Biofuel Production ◽  
Aquatic Life ◽  
Chlorella Sp ◽  
Textile Wastewaters

Abstract The uncontrolled utilization for the textile products is increasing year by year resulting with the elevating wastewater generated from the textile industries, which makes it among the prevalent sources of critical environmental deteoration issue globally. Products obtained from the dyes used are the primary toxic product for aquatic life, they cause aesthetic pollution, eutrophication, perturbation and increase in BOD and COD in aquatic life. Three types of textile wastewaters (Acid Yellow dye, Acid orange dye and Basic pink dye) has been used for wastewater treatment and microalgal (Chlorella pyrenoidosa) biomass production. Nitrogen content in textile wastewaters is very less, hence urea is used as nitrogen source in wastewater. Optimal growth condition (Urea-0.4g/L, wastewater- 40%(v/v)) is developed through Response surface methodology (RSM). The biomass productivity for chlorella sp. is 1.2-1.5 g/L/day in textile wastewaters. The reduction efficiency of COD, Nitrate-N Ammonia-N, Phosphate-P, and Dye(color) removal for Chlorella is 90-95%, 75-85%, 90-98%, 65-74% and 40-65%.After harvesting the Biomass by flocculation method it can be used for biofuel production by in-situ transesterification.

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