scholarly journals Effects of Nitrogen Supplementation Status on CO2 Biofixation and Biofuel Production of the Promising Microalga Chlorella sp. ABC-001

2020 ◽  
Vol 30 (8) ◽  
pp. 1235-1243
Author(s):  
Jun Muk Cho ◽  
You-Kwan Oh ◽  
Won-Kun Park ◽  
Yong Keun Chang
Keyword(s):  
Biofuel Production ◽  
Nitrogen Supplementation ◽  
Chlorella Sp ◽  
Co2 Biofixation

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

scholarly journals Cultivation and Biorefinery of Microalgae (Chlorella sp.) for Producing Biofuels and Other Byproducts: A Review

2021 ◽  
Vol 13 (23) ◽  
pp. 13480
Author(s):  
Chiu-Mei Kuo ◽  
Yu-Ling Sun ◽  
Cheng-Han Lin ◽  
Chao-Hsu Lin ◽  
Hsi-Tien Wu ◽  
...  
Keyword(s):  
Environmental Sustainability ◽  
Co2 Fixation ◽  
Scale Up ◽  
Co2 Reduction ◽  
Feed Additives ◽  
Future Research ◽  
Microalgal Biomass ◽  
Microalgal Cultivation ◽  
Chlorella Sp ◽  
Co2 Biofixation

Microalgae-based carbon dioxide (CO2) biofixation and biorefinery are the most efficient methods of biological CO2 reduction and reutilization. The diversification and high-value byproducts of microalgal biomass, known as microalgae-based biorefinery, are considered the most promising platforms for the sustainable development of energy and the environment, in addition to the improvement and integration of microalgal cultivation, scale-up, harvest, and extraction technologies. In this review, the factors influencing CO2 biofixation by microalgae, including microalgal strains, flue gas, wastewater, light, pH, temperature, and microalgae cultivation systems are summarized. Moreover, the biorefinery of Chlorella biomass for producing biofuels and its byproducts, such as fine chemicals, feed additives, and high-value products, are also discussed. The technical and economic assessments (TEAs) and life cycle assessments (LCAs) are introduced to evaluate the sustainability of microalgae CO2 fixation technology. This review provides detailed insights on the adjusted factors of microalgal cultivation to establish sustainable biological CO2 fixation technology, and the diversified applications of microalgal biomass in biorefinery. The economic and environmental sustainability, and the limitations and needs of microalgal CO2 fixation, are discussed. Finally, future research directions are provided for CO2 reduction by microalgae.

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

Characterization of a microalgal mutant for CO2 biofixation and biofuel production

2016 ◽  
Vol 122 ◽  
pp. 344-349 ◽  
Author(s):  
Feng Qi ◽  
Haiyan Pei ◽  
Wenrong Hu ◽  
Ruimin Mu ◽  
Shuo Zhang
Keyword(s):  
Biofuel Production ◽  
Co2 Biofixation

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.

scholarly journals Harvesting of Chlorella sp. by Co-cultivation with Some Fil-amentous Fungi

2018 ◽  
Vol 28 (2) ◽  
pp. 35
Author(s):  
Rana H. Hameed Al-Shammari
Keyword(s):  
Aspergillus Terreus ◽  
Research Area ◽  
Economic Feasibility ◽  
Biofuel Production ◽  
Process Time ◽  
Microalgae Harvesting ◽  
Chlorella Sp ◽  
Lower Glucose ◽  
Harvesting Process ◽  
New Research

Algae are play a major role as straight producers of biofuels, so expansion of a new. harvesting-technology is important to achieve economic feasibility of biofuel production from algae.. Fungal pelletization-assisted.. Microalgal harvesting has Emerged as new research area for decreasing the harvesting cost and energy inputs in the algae-to-biofuel method. The present study tried to opti-mize process circumstances as (substrate inputs, process time and pH). Through choice of a ro-bust fungal strain. Four fungal strains (Aspergillus terreus, Trichoderma sp., Mucor sp. and Rhi-zopus sp.) were screened for their pelletizing efficiency in fresh/supplemented chu-10 with select-ed media nutrient (glucose, nitrogen and phosphorous). Results showed that Aspergillus terreus was the most efficient strain for pelletizing in the nutrient supplemented chu-10 with its neutral pH (7) and acidic pH (5). Stimulatingly, A. terreus was capable to harvest nearly 100 % of the Clorella sp. cells (1×106 spore/ml at optical density (OD) approximately 2.5 initial working algal concentration) within only 24 h. at supplementation of (10 g/l glucose, 2.5 mg/l aNH4NO3 and 0.5 mg/l mK2HPO4) also performed well at lower glucose level (5 g/l) can also results in similar har-vesting but its need relatively higher incubation time. The procedure kinetics in term of harvesting index (H. I) as well as the variation of residual glucose and pH with time was also studied. The mechanism of harvesting process was studied through microscopic, examination. A. terreus strain investigated in this study could emerge as an efficient, sustainable and economically viable tool in microalgae harvesting for biofuel production and time conservation

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