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Electric flocculation device for industrialized microalgae separation and collection

An electro-flocculation and micro-algae technology, applied in the methods of stress-stimulated microbial growth, biochemical instruments, biochemical equipment and methods, etc. quality, improve the effect of electroflocculation, and the effect of high electroflocculation efficiency

Inactive Publication Date: 2011-11-09
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are the following problems in the process of electroflocculation separation of microalgae: ① Microalgae cells precipitate on the surface of the electrode and adsorb on the electrode surface, resulting in a decrease in separation efficiency; ② Problems in the amplification and continuous operation of microalgae electroflocculation
[0005] Microalgae electroflocculation adopts a trough device. Since the surface of the electrode needs to be descaled frequently during the operation, it is difficult to carry out continuous operation of trough microalgae electroflocculation; at the same time, this is also unfavorable for the industrial scale-up of microalgae electroflocculation , there is no report on the industrialization of microalgae electroflocculation

Method used

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  • Electric flocculation device for industrialized microalgae separation and collection
  • Electric flocculation device for industrialized microalgae separation and collection
  • Electric flocculation device for industrialized microalgae separation and collection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1: Separation and collection of algal body in botrytis culture fluid

[0051] In the device of the present invention, the separation and collection of algal bodies in the botrytis culture solution is carried out. The botrytis culture liquid enters the tower body through the feed liquid inlet 17, and then electrocoagulation is carried out to separate the algae bodies during the downward movement. The liquid outlet 15 is discharged; the algal body floats to the surface of the liquid under the effect of rising gas while flocculating and continuously gathers, and then overflows and collects from the algal body outlet 6; the flow rate ratio of the feed liquid inlet 17 and the feed liquid outlet 15 is 1: 0.95. During the continuous separation and collection process, samples were taken at the feed liquid outlet 15 to measure the biomass of microalgae in the clear liquid, and the recovery rate of the botrytis algae body was 98.5%.

Embodiment 2

[0052] Embodiment 2: Separation and collection of algal body in chlorella culture fluid

[0053] In the device of the present invention, the separation and collection of algal bodies in the chlorella culture solution is carried out. The chlorella culture solution enters the tower body from the feed liquid inlet 17, and then electrocoagulation is carried out to separate the algae bodies during the downward movement, and the clear liquid It is discharged from the feed liquid outlet 15; while the algae are flocculated, they float to the surface of the liquid under the action of the rising gas and gather continuously, and then overflow and collect from the algae outlet 6; the flow rate ratio between the feed liquid inlet 17 and the feed liquid outlet 15 is 1:0.85. During the continuous separation and collection process, samples were taken at feed liquid outlet 15 to measure the biomass of microalgae in the clear liquid, and the recovery rate of algae body of chlorella was 98.9%. ...

Embodiment 3

[0054] Embodiment 3: Separation and collection of algal body in spirulina culture fluid

[0055] In the device of the present invention, the separation and collection of algae bodies in the spirulina culture solution is carried out. The spirulina culture solution enters the tower body from the feed liquid inlet 17, and then electrocoagulation is carried out to separate the algae bodies during the downward movement. The liquid outlet 15 is discharged; the algal body floats to the surface of the liquid under the effect of rising gas while flocculating and continuously gathers, and then overflows and collects from the algal body outlet 6; the flow rate ratio of the feed liquid inlet 17 and the feed liquid outlet 15 is 1: 0.9. During the continuous separation and collection process, samples were taken at feed liquid outlet 15 to measure the biomass of microalgae in the clear liquid, and the algae body recovery rate of spirulina was 97.5%.

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Abstract

The invention discloses an electric flocculation device for industrialized microalgae separation and collection, which comprises a mechanical transmission system, a column body, a plurality of sieve plates, and an auxiliary device; a connecting rod system in the mechanical transmission system drives the sieve plates in the column body to vibrate together up and down; the invention is characterized in that the connecting rod system comprises two main shafts; the material of the main shaft is a conductive metal material, and the two main shafts are connected to an anode and a cathode of a DC power supply respectively; the plurality of sieve plates is serially sleeved on the two main shafts; the contact parts of the two main shafts and the sieve plates are coated with insulating layers with each layer being left-right interlaced orderly, therefore the sieve plates are in a state of anode-cathode interlaced distribution in the column body. The device uses sieve plates of a vibrating sieve-plate column as the anodes and the cathodes for electric flocculation; the anodes and the cathodes are distributed interlacedly; the electric flocculation efficiency is high; the sieve plates are in a vibration state; deposition and adsorption of microalgae body on electrode surfaces are effectively prevented; and the invention is applicable to large-scale industrial production.

Description

technical field [0001] The invention relates to an electric flocculation device for microalgae, in particular to an electric flocculation device for separating and collecting microalgae for industrial use. Background technique [0002] Microalgae cultivation has been widely used in the fields of aquaculture, food, pharmaceuticals, and energy. However, the separation and collection of microalgae has become one of the main factors restricting the large-scale expansion of microalgae cultivation. The current separation and collection methods of microalgae mainly include: centrifugation, filtration, flocculation, and air flotation. The centrifugal method requires expensive fixed assets (centrifuge) investment and high energy consumption; the filtration method has low efficiency, the membrane is easy to block, and the operation is difficult; the separation and collection of microalgae by the flocculation method requires the use of various flocculants, and the flocculation It is d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12M1/42
CPCC12M47/02C12M35/04C12M23/20C12M27/16C12M21/02C12M35/02C12M33/00
Inventor 刘春朝徐玲王锋郭晨
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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