東華大學圖書館 |

Sequestration of CO2 in a Photobioreactor Using Freshwater Green Microalgae.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Sequestration of CO2 in a Photobioreactor Using Freshwater Green Microalgae./
作者:	Magoda, K.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2020,
面頁冊數:	104 p.
附註:	Source: Masters Abstracts International, Volume: 82-10.
Contained By:	Masters Abstracts International82-10.
標題:	Biofuels. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28278632
ISBN:	9798708759870

Sequestration of CO2 in a Photobioreactor Using Freshwater Green Microalgae.
Magoda, K.

Sequestration of CO2 in a Photobioreactor Using Freshwater Green Microalgae. - Ann Arbor : ProQuest Dissertations & Theses, 2020 - 104 p.

Source: Masters Abstracts International, Volume: 82-10.

Thesis (M.Tech.)--University of Johannesburg (South Africa), 2020.

This item must not be sold to any third party vendors.

Microalgae are aquatic plants that are able to capture carbon dioxide (CO2) during photosynthesis; a process where light is converted to chemical energy. The organisms that are capable of facilitating this process are referred to as photoautotrophs. Currently, the world is faced with a crisis of global warming due to the production of greenhouse gases (i.e. CO2) produced at various industries. The utilization of microalgae for the mitigation of CO2 emission is deemed as a sustainable solution since these microorganisms utilise CO2 as a carbon source and that the resultant microalgae biomass can be used to produce value-added products. A variety of bioreactor designs have been used to culture microalgae, however, closed photobioreactors (PBRs) are generally utilized since they minimize contamination and control parameters such as temperature, pH, and light intensity.This study investigated CO2 sequestration in a batch shake flask supplemented with CO2 to determine optimum conditions using Spumella sp. with an accession number of KF651119 were aeration and mixing rate was studied, and thereafter, optimum conditions were used on a scale up PBR study the validate of the CO2 sequestration process.To achieve objectives of this study, batch experiments in 500 mL Erlenmeyer flasks were undertaken at the shaker, using fertiliser as a source of macro/micro-nutrients in the experiment. In the initial experiment, the effect of aeration rates of 7, 10.5, 24.5, and 49 mL.min-1 in a flask inoculated with Spumella sp. aerated with 20%v/v CO2 concentration were investigated. The highest biomass concentration, specific growth rate (μ), biomass production rate (BPR), and CO2 fixation rate (CFR) were achieved at an aeration rate of 24.5 mL.min-1, and were 0.815 g.L-1, 0.122 day-1, 78 mg.L-1.d-1, and 142.8 mg.L-1 .d-1 respectively. The low biomass concentration, μ, BPR, and CFR were 0.563 g.L-1, 0.05 day-1, 16.85 mg.L-1.d-1, and 30.85 mg.L-1.d-1 respectively achieved at an aeration rate of 10.5 mL.min-1 . A further increased in the aeration rate of 49 mL.min-1 led to a decrease in biomass concentration to 0.342 g.L-1. This was followed by a study to investigate the effect of mixing rates of 30, 60, and 100 rpm, in a 500 mL flask incubated with Spumella sp. strain, at the optimum aeration rate of 24.5 mL.min-1, aerated with 20% v/v CO2 concentration. The highest average μ, biomass concentration, and CFR was achieved at a mixing rate of 100 rpm were 0.640 day-1, 0.516 g.L-1, and 0,945 g.L-1.d-1 while mixing rate of 60 rpm achieved low biomass concentration, μ, and CFR. Following the results achieved from the batch shake flasks, the ability of Spumella sp. was assessed in a bubble PBR of 11 L volume for the sequestration of CO2 at a controlled temperature of 30 and light intensity of 8640 lux. The aeration rate within the reactor was kept at 2 L.min-1. The fertiliser was used as a source of macro/micro-nutrients in the experiment, with 20% v/v CO2 gas being aerated from the bottom of the PBR. The average biomass concentration, and μ achieved were 0.938 g.L-1 and 0.10 day-1 respectively. The BPR and CFR achieved were 52.18 and 98.09 mg.L-1.d-1 respectively. The most noteworthy CO2 removal efficiency achieved was 88% and the outcomes demonstrated that the PBR worked efficiently for CO2 sequestration by phototrophic microalgae strain cultured in vertical PBR with an overall mass transfer of 1.69 x 10-4 min-1. The overall research illustrated that Spumella sp. strain is capable for sequestrating CO2 under controlled conditions. The future work need to be done on assessing the growth rates of the Spumella sp. using fuel gas for industrial exhaust gas applications and also study the lipid production profiles for possibility oil extraction that can be utilized for energy production.

ISBN: 9798708759870Subjects--Topical Terms:

3562565
Biofuels.
Subjects--Index Terms:

Algae

Sequestration of CO2 in a Photobioreactor Using Freshwater Green Microalgae.
LDR:04976nmm a2200361 4500 001 2283580
005 20211115071503.5
008 220723s2020 ||||||||||||||||| ||eng d
020 $a 9798708759870
035 $a (MiAaPQ)AAI28278632
035 $a (MiAaPQ)Johannesburg39939
035 $a AAI28278632
040 $a MiAaPQ $c MiAaPQ
100 1 $a Magoda, K. $3 3562564
245 1 0 $a Sequestration of CO2 in a Photobioreactor Using Freshwater Green Microalgae.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2020
300 $a 104 p.
500 $a Source: Masters Abstracts International, Volume: 82-10.
500 $a Advisor: Huberts, R.; Mekuto, L.
502 $a Thesis (M.Tech.)--University of Johannesburg (South Africa), 2020.
506 $a This item must not be sold to any third party vendors.
520 $a Microalgae are aquatic plants that are able to capture carbon dioxide (CO2) during photosynthesis; a process where light is converted to chemical energy. The organisms that are capable of facilitating this process are referred to as photoautotrophs. Currently, the world is faced with a crisis of global warming due to the production of greenhouse gases (i.e. CO2) produced at various industries. The utilization of microalgae for the mitigation of CO2 emission is deemed as a sustainable solution since these microorganisms utilise CO2 as a carbon source and that the resultant microalgae biomass can be used to produce value-added products. A variety of bioreactor designs have been used to culture microalgae, however, closed photobioreactors (PBRs) are generally utilized since they minimize contamination and control parameters such as temperature, pH, and light intensity.This study investigated CO2 sequestration in a batch shake flask supplemented with CO2 to determine optimum conditions using Spumella sp. with an accession number of KF651119 were aeration and mixing rate was studied, and thereafter, optimum conditions were used on a scale up PBR study the validate of the CO2 sequestration process.To achieve objectives of this study, batch experiments in 500 mL Erlenmeyer flasks were undertaken at the shaker, using fertiliser as a source of macro/micro-nutrients in the experiment. In the initial experiment, the effect of aeration rates of 7, 10.5, 24.5, and 49 mL.min-1 in a flask inoculated with Spumella sp. aerated with 20%v/v CO2 concentration were investigated. The highest biomass concentration, specific growth rate (μ), biomass production rate (BPR), and CO2 fixation rate (CFR) were achieved at an aeration rate of 24.5 mL.min-1, and were 0.815 g.L-1, 0.122 day-1, 78 mg.L-1.d-1, and 142.8 mg.L-1 .d-1 respectively. The low biomass concentration, μ, BPR, and CFR were 0.563 g.L-1, 0.05 day-1, 16.85 mg.L-1.d-1, and 30.85 mg.L-1.d-1 respectively achieved at an aeration rate of 10.5 mL.min-1 . A further increased in the aeration rate of 49 mL.min-1 led to a decrease in biomass concentration to 0.342 g.L-1. This was followed by a study to investigate the effect of mixing rates of 30, 60, and 100 rpm, in a 500 mL flask incubated with Spumella sp. strain, at the optimum aeration rate of 24.5 mL.min-1, aerated with 20% v/v CO2 concentration. The highest average μ, biomass concentration, and CFR was achieved at a mixing rate of 100 rpm were 0.640 day-1, 0.516 g.L-1, and 0,945 g.L-1.d-1 while mixing rate of 60 rpm achieved low biomass concentration, μ, and CFR. Following the results achieved from the batch shake flasks, the ability of Spumella sp. was assessed in a bubble PBR of 11 L volume for the sequestration of CO2 at a controlled temperature of 30 and light intensity of 8640 lux. The aeration rate within the reactor was kept at 2 L.min-1. The fertiliser was used as a source of macro/micro-nutrients in the experiment, with 20% v/v CO2 gas being aerated from the bottom of the PBR. The average biomass concentration, and μ achieved were 0.938 g.L-1 and 0.10 day-1 respectively. The BPR and CFR achieved were 52.18 and 98.09 mg.L-1.d-1 respectively. The most noteworthy CO2 removal efficiency achieved was 88% and the outcomes demonstrated that the PBR worked efficiently for CO2 sequestration by phototrophic microalgae strain cultured in vertical PBR with an overall mass transfer of 1.69 x 10-4 min-1. The overall research illustrated that Spumella sp. strain is capable for sequestrating CO2 under controlled conditions. The future work need to be done on assessing the growth rates of the Spumella sp. using fuel gas for industrial exhaust gas applications and also study the lipid production profiles for possibility oil extraction that can be utilized for energy production.
590 $a School code: 2140.
650 4 $a Biofuels. $3 3562565
650 4 $a Biodiesel fuels. $3 587935
650 4 $a Engineering. $3 586835
650 4 $a Biomass. $3 1013462
650 4 $a Alternative energy sources. $3 3561089
650 4 $a Carbon dioxide removal. $3 3562566
650 4 $a Biotechnology. $3 571461
650 4 $a Algae. $3 546231
650 4 $a Bioengineering. $3 657580
650 4 $a Carbon dioxide. $3 587886
653 $a Algae
653 $a CO2 sequestration
653 $a Spumella sp.
653 $a Bubble photobioreactor
690 $a 0542
690 $a 0363
710 2 $a University of Johannesburg (South Africa). $3 3555351
773 0 $t Masters Abstracts International $g 82-10.
790 $a 2140
791 $a M.Tech.
792 $a 2020
793 $a English
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28278632