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Green, safe and rapid micro-algae harvesting method

A harvesting method and technology of microalgae, applied in the direction of microorganism-based methods, chemical instruments and methods, biochemical equipment and methods, etc., can solve problems such as unsuitable for large-scale application, high economic cost, and no commercial products

Inactive Publication Date: 2017-08-01
NANJING HYDRAULIC RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the microbial flocculant used in this method needs to be obtained through a series of processes such as microbial cultivation, fermentation, separation, and purification. The economic cost is relatively high, and there is no commercial product, so it is not suitable for large-scale application.

Method used

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  • Green, safe and rapid micro-algae harvesting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Doses of 2, 4, 6, 8, 10, 12, 15mg / L chitosan were added to 500ml of the initial algal concentration of 3.63 × 10 10 In the chlorella solution of cells / L, after stirring at 200rpm for 10min, at 22.2A / m 2 Under the condition of current density, turn on the electric float for 5 minutes, and measure the algae harvest rate after standing for 10 minutes.

Embodiment 2

[0027] Doses of 2, 4, 6, 8, 10, 12, 15mg / L chitosan were added to 500ml of the initial algal concentration of 3.63 × 10 10 In the chlorella solution of cells / L, after stirring at 200rpm for 10min, at 44.4A / m 2 Under the condition of current density, turn on the electric float for 10 minutes, and measure the algae harvest rate after standing for 10 minutes.

Embodiment 3

[0029] Doses of 2, 4, 6, 8, 10, 12, 15mg / L chitosan were added to 500ml of the initial algal concentration of 3.63 × 10 10 In the chlorella solution of cells / L, after stirring at 200rpm for 10min, at 66.6A / m 2 Under the condition of current density, turn on the electric float for 5 minutes, and measure the algae harvest rate after standing for 10 minutes.

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Abstract

The invention discloses a green, safe and rapid micro-algae harvesting method. The green, safe and rapid micro-algae harvesting method comprises the following steps: firstly, electrically neutralizing negative charges on surfaces of algae particles by utilizing a food-grade natural high-molecular flocculating agent so as to accelerate the algae particles to lose stability; furthermore, forming algae floc under a bridging and net capturing action of a high-molecular chain; sticking the algae floc on micro-bubbles generated by utilizing electric air floatation, so as to form a water-gas-floc three-phase mixing system; enabling the system to be rapidly floated to a water surface, so as to realize rapid collection of micro-alga. The green, safe and rapid micro-algae harvesting method has the advantages of simplicity, rapidness, no pollution and the like and is applicable to harvesting of the micro-alga with an edible value and other micro-alga; the green, safe and rapid micro-algae harvesting method has remarkable advantages in the aspect of heath-care resourceful utilization of algae foods.

Description

technical field [0001] The invention relates to a microalgae harvesting method, in particular to a green, safe and rapid microalgae harvesting method. Background technique [0002] In recent years, algae have been widely used in many fields such as bioenergy, carbon sequestration and emission reduction, and food health care due to their fast growth rate and high lipid content. At present, the large-scale and continuous cultivation technology of algae has become increasingly mature, but the harvest of microalgae has become the bottleneck of its resource utilization. If the rapid and pollution-free harvesting of microalgae can be realized, it will be of great significance for its subsequent development (especially edible algae). [0003] Commonly used algae harvesting methods mainly include standing, centrifuging, filtering, and chemical flocculation. The static method is the simplest, but it is only suitable for large-particle algae, and it takes a long time; the centrifuga...

Claims

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Application Information

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IPC IPC(8): C02F9/06C02F9/14C12N1/12C12R1/89
CPCC02F1/5263C02F1/465C02F3/342C02F2201/4614C12N1/12
Inventor 陈求稳施文卿朱琳羊华陈宇琛姬雨雨余居华王智源
Owner NANJING HYDRAULIC RES INST
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