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Carbon dioxide absorbing tower type photobioreactor and microalgae cultivation method

A photobioreactor, carbon dioxide technology, applied in photobioreactor, bioreactor/fermenter combination, bioreactor/fermenter for specific purposes, etc., can solve the problem of low concentration, utilization loss, low breeding depth, etc. The problem is to overcome the low utilization rate of CO2, to overcome the short residence time, and to improve the growth rate of microalgae.

Inactive Publication Date: 2019-03-19
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the depth of algae culture is generally 15-30cm, and the CO 2 The residence time of air bubbles in the algae fluid is only a few milliseconds, resulting in dissolved CO in the algae fluid 2 low concentration
CO for runway pool aeration 2 The utilization rate is generally only 30-40%, most of the CO 2 is released into the air again in the form of gas, causing CO 2 Take advantage of the loss and give CO 2 Pressure to cut emissions

Method used

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  • Carbon dioxide absorbing tower type photobioreactor and microalgae cultivation method

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Embodiment 1

[0035] A carbon dioxide absorption tower photobioreactor, the structure and connections of which are as described above. Among them, the pore size of the gas distributor is controlled at 1 mm, and the porosity is 0.8; the desiccant uses color-changing silica gel.

[0036] The method of utilizing the reactor to cultivate microalgae is as follows:

[0037] Dissolve 200mM / L Na 2 CO 3 solution in Na 2 CO 3 In the dissolution pool, open the Na 2 CO 3 Solution switch valve, through the pressure pump to Na 2 CO 3 The solution is injected into the carbon dioxide absorption tower, Na 2 CO 3 solution in CO 2 The volume ratio in the absorption tower is controlled at 0.4. Close Na 2 CO 3 Solution switch valve and product outlet switch valve, open CO 2 gas source switch, making the CO 2 The gas passes through the dryer, the pressure control valve, the check valve in turn, and finally enters the reaction system through the air inlet. CO control 2 The pressure is 0.3MPa, CO ...

Embodiment 2

[0039] A carbon dioxide absorption tower photobioreactor, the structure and connections of which are as described above. Among them, the pore size of the gas distributor is controlled at 0.8mm, and the porosity is 0.85; the desiccant uses color-changing silica gel.

[0040] The method of utilizing the reactor to cultivate microalgae is as follows:

[0041] Dissolve 200mM / L Na 2 CO 3 solution in Na 2 CO 3 In the dissolution pool, open the Na 2 CO 3 Solution switch valve, through the pressure pump to Na 2 CO 3 The solution is injected into the carbon dioxide absorption tower, Na 2 CO 3 solution in CO 2 The volume ratio in the absorption tower is controlled at 0.5. Close Na 2 CO 3 Solution switch valve and product outlet switch valve, open CO 2 gas source switch, making the CO 2 The gas passes through the dryer, the pressure control valve, the check valve in turn, and finally enters the reaction system through the air inlet. CO control 2 CO in the absorption towe...

Embodiment 3

[0043] A carbon dioxide absorption tower photobioreactor, the structure and connections of which are as described above. Among them, the pore size of the gas distributor is controlled at 0.7mm, and the porosity is 0.9; the desiccant is made of color-changing silica gel.

[0044] The method of utilizing the reactor to cultivate microalgae is as follows:

[0045] Dissolve 200mM / L Na 2 CO 3 solution in Na 2 CO 3 In the dissolution pool, open the Na 2 CO 3 Solution switch valve, through the pressure pump to Na 2 CO 3 The solution is injected into the carbon dioxide absorption tower, Na 2 CO3 solution in CO 2 The volume ratio in the absorption tower is controlled at 0.6. Close Na 2 CO 3 Solution switch valve and product outlet switch valve, open CO 2 gas source switch, making the CO 2 The gas passes through the dryer, the pressure control valve, the check valve in turn, and finally enters the reaction system through the air inlet. CO control 2 CO in the absorption t...

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Abstract

The invention relates to the technology of biomass energy utilization, and aims to provide a carbon dioxide absorbing tower type photobioreactor and a microalgae cultivation method. The photobioreactor comprises a microalgae cultivation photobioreactor system and a CO2 (carbon dioxide) absorbing tower, a gas distributor is mounted at the bottom of the CO2 absorbing tower, a CO2 inlet system is connected to the gas distributor through a pipeline, a Na2CO3 feeding system is connected to a top portion of the CO2 absorbing tower through a pipeline, a discharging system is connected with an outletin a bottom portion of the CO2 absorbing tower and the microalgae cultivation photobioreactor system respectively through pipelines, and a CO2 recovering system is connected with a gas outlet in the top portion of the CO2 absorbing tower and a dryer inlet of the CO2 inlet system respectively through pipelines. According to the microalgae cultivation method, CO2 and Na2CO3 are enabled to react to generate NaHCO3 for microalgae growth, concentration of HCO3<-> in reaction products of the CO2 absorbing tower is enabled to be controlled, and microalgae growth can be accelerated effectively.

Description

technical field [0001] The invention relates to biomass energy utilization technology, in particular to a carbon dioxide absorption tower photobioreactor and a microalgae cultivation method. Background technique [0002] Microalgae grows fast and is easy to grow on a large scale. Using microalgae biomass to absorb CO in flue gas of coal-fired power plants 2 Has been applied in engineering. Microalgae utilize CO 2 There are two forms, one is dissolved CO in solution 2 Molecules enter algal cells by direct diffusion form, the other is CO 2 The molecule is converted to HCO catalyzed by extracellular carbonic anhydrase 3 - , enters the cell through active transport and is re-decomposed into CO in the cell 2 For photosynthesis of microalgae. due to CO in the air 2 Low content, CO 2 Low dissolution rate in algal fluid, HCO 3 - In order to enter the main inorganic carbon form of algae cells, thus increasing the HCO in the algae liquid 3 - Concentration is the key to mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12M1/04C12M1/00C12N1/12C12R1/89
CPCC12M21/02C12M29/06C12M41/40C12N1/12
Inventor 程军岑可法刘建忠周俊虎王智化杨卫娟周志军张彦威何勇
Owner ZHEJIANG UNIV