Immersed dunaliella salina liquid ultrafiltration system and dunaliella salina liquid concentration method

An ultrafiltration system and immersion technology, applied in the field of salina cultivation, can solve the problems of reducing biomass, increasing the total amount of culture medium, damage and rupture, etc., to increase the concentration of salina, improve harvesting efficiency, and reduce investment cost effect

Inactive Publication Date: 2018-05-11
TIANJIN MOTIMO MEMBRANE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former needs to consume a lot of raw salt and other raw materials; the latter needs to occupy a lot of space and increase the production investment cost; in addition, because the algae cells are small and fragile, they are easy to be damaged and ruptured, and if transported mechanically, it will easily cause the death of the salina and reduce the cost of production. Effective biomass; at the same time, due to the blending of high brine, the total amount of culture solution becomes larger, which increases the final treatment capacity and increases the harvesting cost

Method used

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  • Immersed dunaliella salina liquid ultrafiltration system and dunaliella salina liquid concentration method
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  • Immersed dunaliella salina liquid ultrafiltration system and dunaliella salina liquid concentration method

Examples

Experimental program
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Effect test

Embodiment 1

[0039] like figure 1 As shown, a salina liquid submerged ultrafiltration system includes a runway pool 16, a submerged ultrafiltration membrane module 2, a concentration pool 1, a water production system, an aeration system and a backwash system, wherein,

[0040] The liquid outlet below the runway pool 16 communicates with the pipeline of the concentration pool, and the pipeline is provided with a water inlet valve 17;

[0041] The concentration pool 1 is provided with the submerged ultrafiltration membrane module 2 inside. The submerged ultrafiltration membrane in the module adopts a hollow fiber ultrafiltration membrane with a filtration accuracy of 0.03-0.1 μm, and the membrane frame adopts UPVC, ABS, etc. Anti-corrosion materials to prevent corrosion and avoid affecting algae growth;

[0042] The water production system is composed of a water production centrifugal pump 7, a water production regulating valve 9, a water production flowmeter 10, a water production pressure g...

Embodiment 2

[0047] A method for concentrating algae liquid, realizing the concentration of algae liquid through the submerged ultrafiltration system described in embodiment 1, the specific method is as follows:

[0048] (1) Salina grows to 5×10 in the raceway pond 16 of 12 ° Bé 5 cells / ml, and then flow into the concentration pool 1 by gravity, and the flow rate can be controlled by the water inlet valve 17 of the runway pool;

[0049] (2) The submerged ultrafiltration membrane is in the concentration pool 1, and the concentration rate of the concentration pool is 2-8. The concentration rate can be controlled by the total amount of culture solution and the average water production in the runway pool entering the concentration pool. When the concentration pool 1 After reaching the 2.0-meter liquid level, the water production system starts to concentrate. After the concentration process starts, the water production regulating valve 9 is opened, and the water production centrifugal pump 7 is...

Embodiment 3

[0055] The design water production is about 80m3 / d.

[0056] The designed operating flux is 6.7LMH, and the operating pressure is -5 to -20kPa.

[0057] The system plans to adopt the operation mode of 8 stops and 2 stops, that is, water production for 8 minutes and aeration for 2 minutes.

[0058] The effective volume of the concentration pool is 10m 3 , Concentration tank size: length × width × height = 2.0 × 2.5 × 2.5m, super high 0.5m.

[0059] Adopt 40 curtains 12.5m 2 Curtain ultrafiltration membrane with an average pore size of 0.1μm and a total membrane area of ​​500m 2 .

[0060] A total of 4 sets of formwork were made, and each set of formwork was composed of 10 curtain films. The water collection pipe, aeration pipe and frame structure are all made of drinking water grade UPVC material. Considering the corrosive characteristics of brine, the main body of the membrane pool adopts PP structure.

[0061] See Example 1 for the specific structure, and Example 2 for ...

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Abstract

The invention provides an immersed dunaliella salina liquid ultrafiltration system. The system comprises a track tank, an immersed ultrafiltration assembly, a concentration tank, a water producing system, an aeration system and a backwashing system. By means of a dunaliella salina liquid concentration method of the ultrafiltration system, dunaliella salina heavily proliferated under the approximate optimum growth salinity condition is effectively concentrated, the size of low-salinity dunaliella salina liquids is greatly reduced while the biomass is kept, high brine amount added to realize thehigh-salinity stress growth condition later is reduced, the death rate of dunaliella salina in the concentration process can be reduced to the greatest extent through precise control on ultrafiltration work pressure, and more effective biomass can be obtained.

Description

technical field [0001] The invention relates to the technical field of salina culture, and relates to a salina liquid submerged ultrafiltration system and a salina liquid concentration method. Background technique [0002] Dunaliella salina is a single-celled phytoplankton. It has a wide range of halophiles. In addition to its strong adaptability to pH and osmotic stress, it also has strong resistance to temperature stress. In the production of β Carotene, glycerin, protein feed and other fields are widely used. The production of salina mainly adopts large-scale open culture, and seawater and brine are mostly used as the culture medium. During the culture process, not only must a large amount of biomass be obtained, but also substances such as β-carotene must be accumulated in large quantities. Salina will accumulate a large amount of β-carotene under stress conditions (high salt, low nitrogen and strong light), but this condition is not the optimal growth condition. There...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/18B01D61/20B01D61/14B01D65/02
CPCB01D61/145B01D61/18B01D61/20B01D65/02B01D2321/04B01D2321/18
Inventor 孙磊戴海平孙明袁心张程
Owner TIANJIN MOTIMO MEMBRANE TECH
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