BioCO2 – A multidisciplinary, biological approach using solar energy to capture CO2 while producing H2 and high value products

Skjånes, Kari; Lindblad, Peter; Muller, J.-C.

doi:10.1016/j.bioeng.2007.06.002

Cited by 180 publications

(77 citation statements)

References 92 publications

(85 reference statements)

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“…Other research approaches have considered the production of hydrogen through biophotolysis [2,3] and, more recently, by indirect photolysis and dark fermentation [4]. The potential for direct ethanol production appears limited, although the fermentation of starch storage products may be more favourable [5].…”

Section: Introductionmentioning

confidence: 99%

Comparative testing of energy yields from micro-algal biomass cultures processed via anaerobic digestion

2016

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. Comparative testing of energy yields from microalgal biomass cultures processed via anaerobic digestion. Renewable Energy, 87,[744][745][746][747][748][749][750][751][752][753] http://www.sciencedirect.com/science/article/pii/S0960148115304286 doi:10.1016/j.renene.2015.11.009 __________________________________________________________________________________ Comparative testing of energy yields from micro-algal biomass cultures processed via anaerobic digestion Keiron P. Roberts, Sonia Heaven, Charles J. Banks Faculty of Engineering and the Environment, University of Southampton, Southampton, SO17 1BJ, UK (Email K.P. Roberts@soton.ac.uk, S.Heaven@soton.ac.uk, C.J.Banks@soton.ac.uk) Abstract Although digestion of micro-algal biomass was first suggested in the 1950s, there is still only limited information available for assessment of its potential. The research examined six laboratory-grown marine and freshwater micro-algae and two samples from large-scale cultivation systems. Biomass composition was characterised to allow prediction of potentially available energy using the Buswell equation, with calorific values as a benchmark for energy recovery. Biochemical methane potential tests were analysed using a pseudo-parallel first order model to estimate kinetic coefficients and proportions of readily-biodegradable carbon. Chemical composition was used to assess potential interferences from nitrogen and sulphur components. Volatile solids (VS) conversion to methane showed a broad range, from 0.161-0.435 L CH 4 g -1 VS; while conversion of calorific value ranged from 26.4-79.2%. Methane productivity of laboratory-grown species was estimated from growth rate, measured by changes in optical density in batch culture, and biomass yield based on an assumed harvested solids content. Volumetric productivity was 0.04-0.08 L CH 4 L -1 culture day -1 , the highest from the marine species Thalassiosira pseudonana. Estimated methane productivity of the large-scale raceway was lower at 0.01 L CH 4 L -1 day -1 . The approach used offers a means of screening for methane productivity per unit of cultivation under standard conditions.

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Section: Introductionmentioning

confidence: 99%

Comparative testing of energy yields from micro-algal biomass cultures processed via anaerobic digestion

2016

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“…However, the emission of CO2 is still an 'Achilles Heels' for this system and thus, new approach has been embarked to counter and reduce more on CO2 emission. The available solution is though CCS using microalgae [16,17]. Thus, this paper reports on the works and progress of isolation of microalgae in the native environment near to the coal-fired power plant [18].…”

Section: Introductionmentioning

confidence: 99%

Isolation, Purification and Identification of Microalgae From Coal-Fired Power Plant Environment

Chik¹,

Yahya²,

Kamarudin

et al. 2017

MJAS

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Carbon capture and storage (CCS) through biological approach has attracted much attention as global warming and climate change issue becomes a worldwide agenda. Energy production industry from coal in Malaysia produced 50.661 million metric tons of carbon dioxide in 2012, and the trend showed it will keep increasing year by year. CCS through biological approach can be done by microalgae which are versatile microorganism which perform photosynthesis process that can store CO2 in the biomass form. In this study, microalgae strains were isolated from the native environment nearby a coal-fired power plant, where samples were collected in different canal in which pre-treated flue gases are discharged. The microalgae strains were identified by both morphological and molecular approaches. Result from 18s rRNA gene sequencing showed that the isolated strains is Chlorella sp. with similarity 99% with Chlorella sp. SAG 211-18. The identified strains of microalgae then cultivated with three concentration of CO2 (ambient air, 1% and 5%) and the growth rate showed 0.4017 day -1 , 0.5752 day -1 and 0.4427 day -1respectively. Different concentration of CO2 (ambient air, 1% and 5%) showed that the isolated strains yielded 1.005gL -1 , 1.101gL -1 and 1.035gL -1 respectively. This study also showed that with different concentration of CO2, the sequestration rate is ranging from 1% to 4.3%.Keywords: microalgae, isolation, purification, DNA sequencing Abstrak Pemerangkapan dan penyimpanan karbon (CCS) melalui pendekatan biologi telah menarik minat pengkaji disebabkan masalah pemanasan dan perubahan iklim global. Pada tahun 2012 sahaja, Malaysia telah menghasilkan 50.661 juta ton metrik karbon dioksida hasil daripada penghasilan tenaga yang bersumberkan arang batu, dan tahun demi tahun penghasilan karbon dioksida dijangkakan akan terus meningkat. Pemerangkapan dan penyimpanan karbon melalui pendekatan biologi boleh dilakukan oleh mikroalga yang merupakan mikroorganisma unggul di mana ianya berupaya menjalankan proses fotosintesis dalam menukarkan karbon dioksida ke dalam bentuk biojisim. Dalam kajian ini, mikroalga dipencilkan daripada habitat asal yang merupakan terusan bagi air penyejuk untuk stesen janakuasa arang batu. Mikroalga yang diperoleh, dikenalpasti menggunakan kaedah pengecaman secara morfologi dan molekul. Hasil keputusan pengenal pastian molekul menggunakan kaedah penjujukan genom 18s rRNA mendapati, mikroalga yang berjaya dipencilkan adalah Chlorella sp. yang mempunyai persamaan sehingga 99% dengan Chlorella sp. SAG 211-18. Mikroalga yang telah menjalani proses identifikasi kemudiannya dikultur menggunakan 3 kepekatan karbon dioksida yang berbeza (CO2 pada udara persekitaran, CO2 1% dan CO2 5%) dan hasil menunjukkan kadar pertumbuhan masing-masing adalah 0.4017 hari -1 , 0.5752 hari -1 , dan 0.4427 hari -1 . Pada kepekatan CO2 yang berbeza (CO2 pada udara persekitaran, CO2 1% dan CO2 5%), hasil biojisim yang terkumpul daripada pengkulturan mikroalga masing-masing

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“…En la actualidad, la reducción del uso de combustibles fósiles, la promoción de captura y secuestro del CO 2 (mitigación biológica o biofijación) parecen ser la forma más viable de paliación [2]. La mitigación biológica, que consiste en convertirlos en materia orgánica [3,4], se consigue a través de la fotosíntesis de las plantas terrestres y un enorme número de microorganismos fotosintéticos. Se sabe, que las plantas contribuyen con una reducción de sólo el 3-6% de las emisiones globales [3].…”

Section: Introductionunclassified

“…La mitigación biológica, que consiste en convertirlos en materia orgánica [3,4], se consigue a través de la fotosíntesis de las plantas terrestres y un enorme número de microorganismos fotosintéticos. Se sabe, que las plantas contribuyen con una reducción de sólo el 3-6% de las emisiones globales [3]. Sin embargo, las microalgas que representan alrededor del 0,5% de la biomasa global, presentan ventajas tales como altas tasas de crecimiento, eficiencia fotosintética y elevada producción de biomasa comparada con otros cultivos terrestres [5,6] pueden llegar a producir alrededor del 70% del oxígeno neto en la tierra, por lo que se ha considerado de 10 a 50 veces más eficientes en fijación de CO 2 que las plantas terrestres [1,[7][8][9][10][11].…”

Section: Introductionunclassified

Impacto del CO2 sobre la densidad celular en seis cepas de microalgas marinas

Huaynate¹,

Huamán²,

Ávila³

et al. 2015

rev.ion

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ResumenDebido a la gran facilidad con que las microalgas pueden capturar el CO 2 del medio ambiente, resulta interesante evaluar la cantidad y tiempo de ingreso de éste a los cultivos masivos, con la fi nalidad de aumentar la densidad celular. El objetivo del presente estudio fue evaluar los tiempos de inyección del mencionado gas, durante la producción de biomasa que conlleve a una mayor densidad celular, evaluando además, la variación del pH sin alterar la calidad del cultivo. A partir de seis cepas obtenidas del Banco de Germoplasma del Instituto del Mar del Perú, se realizaron cultivos tipo batch de 300L en invernadero, el tiempo de cultivo de la fase exponencial donde se realizaron las pruebas fue de tres días. Los datos se procesaron mediante el análisis del parámetro pendiente de la regresión lineal. Los resultados mostraron que la densidad celular es inversamente proporcional al tiempo de inyección de CO 2 al cultivo. La mayor densidad celular, en las diferentes cepas, se obtuvo a los 5min, excepto para las cepas Chaetoceros gracilis y Nannochloris maculata, las cuales obtienen la mayor densidad a los 10 y 15min, respectivamente. La variación de pH tendió hacia la acidez, en un rango de 8 a 4, sin alterar la densidad celular, por el contrario, los cultivos permanecieron libres de contaminantes. En conclusión, los resultados permiten establecer tiempos adecuados de inyección del CO 2 , los cuales fortalecen la fase de crecimiento exponencial aumentando la densidad poblacional en un 30% sobre lo establecido en esta fase.Palabras clave: microalgas, densidad celular, CO 2 , cultivo masivo. AbstractAs microalgae can capture CO 2 easily from the environment, it is interesting to measure the amount and time control of the entry of this gas into microalgae mass culture, in order to increase cell density. The aim of this study was to evaluate the injection times of CO 2 for biomass production that may lead to a higher cell density, it was also evaluated the pH variation without altering the quality of the crop. The work was made with six strains from the Germplasm Bank of the Instituto del Mar del Perú. There were performed cultures like 300L batch in a greenhouse, the cultivation time of the exponential phase lasted three days. The slope of the regression line parameters was analyzed to process data. The results showed that the cell density is inversely proportional to CO 2 injection time cultivation. The higher cell density 23 Cita: Oscanoa Huaynate AI, Ynga Huamán GA, Chang Ávila IL, Aguilar Samanamud CP. Impacto del CO 2 sobre la densidad celular en seis cepas de microalgas marinas. rev.ion. 2015;28(2):23-32.

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BioCO2 – A multidisciplinary, biological approach using solar energy to capture CO2 while producing H2 and high value products

Cited by 180 publications

References 92 publications

Comparative testing of energy yields from micro-algal biomass cultures processed via anaerobic digestion

Comparative testing of energy yields from micro-algal biomass cultures processed via anaerobic digestion

Isolation, Purification and Identification of Microalgae From Coal-Fired Power Plant Environment

Impacto del CO2 sobre la densidad celular en seis cepas de microalgas marinas

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