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Foam concentration and harvest device for microalgae

A foam and microalgae technology, applied in the field of microalgae harvesting, can solve the problems of the micro-bubble technology that needs to be improved, the performance of the flocculant is not ideal, and has not appeared, and achieves the effects of simple structure, reduced labor cost, and improved utilization rate.

Inactive Publication Date: 2014-04-30
SOUTH CHINA SEA INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the beginning of the 20th century, foam flotation was widely used in the mining and metallurgy industry, and was later used to remove surface active substances (such as surfactants, protein enzymes, etc.) and detergents in wastewater; in the field of biochemical products, it can also be separated by foam technology for virus isolation and protein enzyme refining, but there is no report on the use of this method in microalgae harvesting related patents, and there is no special equipment for microalgae foam separation and concentration.
The air flotation separation method is used in wastewater treatment, biological fermentation liquid cell separation and microalgae harvesting, but the air flotation separation method also has some disadvantages, such as the technology for producing fine air bubbles is still to be perfected, the flocculant performance is not ideal, Some microalgae cannot be harvested by air flotation, and the cost of air flotation harvester is relatively high. The above shortcomings limit its application in microalgae harvesting

Method used

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  • Foam concentration and harvest device for microalgae
  • Foam concentration and harvest device for microalgae
  • Foam concentration and harvest device for microalgae

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Embodiment one is used for the concentrated collection of self-produced foam microalgae

[0071] On the basis of following the patent principle of the present invention, a small-scale foam concentration and recovery equipment with a concentration tower volume of 36L is designed and used in the recovery of a self-produced foam microalgae. Please refer to Figure 1-3 As shown, the optical density (OD 700 ) is 2.0, after being concentrated by the recovery device, the optical density (OD 700) is 40.0, the concentration ratio can reach 20, and the concentrated algae liquid can be directly used in the development of bait products. If the concentrated algae liquid is harvested through the centrifuge again, the harvesting cost can be saved by at least 10 times.

Embodiment 2

[0072] Embodiment two is used for the concentrated collection of non-self-produced foam microalgae

[0073] The device of the present invention can not only be used for harvesting self-produced foam microalgae, but also can be used for harvesting non-self-produced foam microalgae. By adding an appropriate concentration, non-toxic, and low-cost foaming agent and foam stabilizer to the algae liquid to be concentrated, more types of microalgae in nature can be concentrated and harvested.

Embodiment 3

[0074] Example 3 A small-scale concentrated recovery device for the study of recovery mechanism and condition optimization

[0075] On the basis of following the principles of the patent of the present invention, a small concentration and recovery device is designed for laboratory basic theoretical research and condition optimization, see Figure 4 , is a preferred embodiment for this purpose. It integrates the bubble generating unit and the liquid flow circulation unit, through the bubble generating unit and the liquid flow circulation unit, the control of parameters such as the size of the bubble, the flow rate of the bubble, and the flow rate of the algae liquid can be easily realized, and at the same time, the type and quantity of the gas distributor can be controlled. optimization research.

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Abstract

The invention discloses a foam concentration and harvest device for microalgae. The foam concentration and harvest device comprises an air bubble generating unit, a concentration and separation tower, a liquid flow circulating unit and a foam collecting unit, wherein the air bubble generating unit comprises a gas source for generating gas, a gas distributor for dispersing the gas into fine air bubbles, and a gas conveying pipeline for connecting the gas source and the gas distributor; the concentration and separation tower comprises a concentration tower main body, a gas path interface, a liquid flow interface, a foam flow diverter and a foam diversion pipe; the liquid flow circulating unit comprises a conveying pump, a liquid conveying pipeline and a liquid reflux pipeline; the foam collecting unit comprises an antifoaming paddle, an antifoaming motor, a collecting pond and a concentrated solution outlet. The microalgae are harvested through a foam concentration and separation structure, so that continuous harvest, serial amplification, multi-stage concentration and easiness in processing are realized during concentration and harvest of microalgae, professional technical personnel is not needed, and the labor cost is reduced.

Description

technical field [0001] The invention relates to the technical field of microalgae harvesting, in particular to a device for concentrating and harvesting microalgae foam. Background technique [0002] Microalgae is a kind of low-level plants that are small in size and can carry out photosynthesis. In recent years, with the depletion of global petrochemical energy and the deterioration of the environment, microalgae, as a potential producer of renewable energy, has attracted more attention from governments and scientists. [0003] At present, there are few types of microalgae that have successfully achieved large-scale cultivation, mainly Spirulina (Spirulina), Dunaliella salina (Dunaliella salina), Haematococcus pluvialis (Haematococcus pluvialis), and Crypthecodinium cohnii , Chlorella (Chlorella) and Porphyridium cruentum (Porphyridium cruentum), etc., a large number of economical microalgae and energy microalgae with development value are difficult to achieve industrializ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12M1/26C12R1/89
CPCC12M47/02
Inventor 李涛向文洲吴华莲潘建平范洁伟王广华戴世鲲杨芳芳
Owner SOUTH CHINA SEA INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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