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Integrated carbon capture and algae culture

A technology of algae and culture medium, applied in the field of integrated carbon capture and algae cultivation, which can solve problems such as low efficiency, high transmission cost, and high cost of carbon capture

Inactive Publication Date: 2014-01-08
WASHINGTON STATE UNIV RES FOUND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In summary, currently using CO from concentrated sources 2 Technologies for algae cultivation are limited by high cost of carbon capture, high transport costs, difficulty in interim storage of CO 2 , and low efficiency

Method used

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  • Integrated carbon capture and algae culture
  • Integrated carbon capture and algae culture
  • Integrated carbon capture and algae culture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] 1. Strains and media

[0053] Dunaliella primolecta (UTEXLB1000) was cultured using artificial seawater medium (UTEX) with reduced concentrations of calcium (5% of the original concentration) and magnesium (10% of the original concentration).

[0054] 2. Well plate culture

[0055] Culture cells in 24-well plates with 2 mL per well. The temperature of the culture room was controlled at 20°C. Different concentrations of sodium bicarbonate were used as an inorganic carbon source, and there was no CO 2 Gas is fed into the culture. Light distribution was measured for each sample using light at a wavelength of 750 nm.

[0056] Dunaliella salina grew to its maximum growth on the third day of culture (Fig. 2). When the pH exceeded 10.0, the pH further increased after 3 days of culture, and the final pH was close to 10.5 in some cultures. Furthermore, its growth in 0.3M bicarbonate was at the same level as growth using lower concentrations, but 0.6M bicarbonate result...

Embodiment 2

[0061] 1. Strains and media

[0062] The unicellular blue-green algae (Euhalothece) ZM001 was cultured with 1.0M sodium bicarbonate concentration, and its composition was:

[0063] composition

concentration

refer to

NaHCO 3

84g / L

KNO 3

2.5g / L

KCl

2g / L

Na 2 SO 4

1.4g / L

K 2 HPO 4

0.38g / L

A5 trace elements

1mL / L

(Mikhodyuk et al., 2008)

pH

9.5

[0064] 2. Cultivation in the Photo-bioreactor

[0065] Cells were grown in the photobioreactor with agitation but without aeration. The optical path for the photobioreactor is about 0.5 cm, and the photobioreactor is placed at an intensity of 100 μmol / m 2 / s light. The culture temperature was 35°C.

[0066] The initial pH was adjusted to 9.5 with sodium hydroxide. Using an inoculum concentration of 1.2 g / L, the final biomass concentration in this culture was 4.8 g / L and the daily...

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Abstract

The feasibility of using CO2 from a concentrated source to grow microalgae is limited by the high cost of CO2 capture and transportation, as well as significant CO2 loss during algae culture. Another challenge is the inability of algae in using CO2 during night while CO2 is continuously produced from the source. To address these challenges, this invention provides a process in which CO2 is captured as bicarbonate and used as feedstock for algae culture. Then the carbonate is regenerated in the algae culture process as absorbent to capture more CO2, which is converted to bicarbonate for use as feedstock, etc. This process significantly reduces carbon capture costs since it avoids the energy for carbonate regeneration.; Also, transporting a solid or aqueous bicarbonate solution has a much lower cost than transporting compressed CO2, and using bicarbonate provides a better alternative for CO2 delivery to algae culture systems than supplying CO2 gas.

Description

technical field [0001] The present invention generally involves the use of CO 2 Integrated methods and systems as feedstock for microorganisms. In particular, the present invention provides a method for capturing CO 2 , convert it into bicarbonate, and then use bicarbonate as a carbon source for the cultivation of photosynthetic algae and cyanobacteria. Background technique [0002] Capture CO 2 Challenges for Algae Cultivation [0003] Combustion of fossil fuels such as coal, oil, and natural gas for energy contributes to atmospheric CO 2 The main reason for the increase in concentrations is the increasing concern about its impact on global climate change and ocean acidification (Iglesias-Rodriguez et al., 2008). Typically, generating 1kWh of electricity results in 0.95kg of CO from coal combustion 2 emissions (DOE & EPA, 2000). A small 50MW coal-fired power plant produces about 1,140 metric tons (MT) of CO 2 / day, while a medium-sized 500MW power plant produces 11,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N1/12C12N1/20C12M3/02C12P7/64C12R1/89C12R1/01
CPCB01D2257/504Y02E50/13C12N1/12C12P7/6427C12M21/02C12P19/04B01D53/60C12M43/04C12P23/00B01D2251/95C05F11/00C12P7/649C12P7/64Y02C10/02B01D53/84Y02P20/59Y02A50/20Y02C20/40Y02E50/10Y02E50/30Y02P20/151Y02W30/40
Inventor 陈树林迟占有谢雨潇赵百锁
Owner WASHINGTON STATE UNIV RES FOUND INC
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