Microalgae collecting device and microalgae collecting method

Abstract

The invention discloses a microalgae collecting device, comprising at least two layers of collecting plates which are separated from each other in a vertical direction, wherein a first end of each of the at least two layers of collecting plates is supported on a first rod, while a second end thereof is supported on a second rod respectively; the first end of each layer of the collecting plate is equipped with a convex corner for preventing deposited microalgae from flowing out; and the second end of each layer of the collecting plate is an opened end good for the microalgae to flow out. When microalgae is deposited, the second rods are pulled upwards so that each layer of the collecting plate is inclined at a first inclination angle with respect to the horizontal direction, in this way, microalgae is deposited at the convex corner at the first end of each layer of the collecting plate; and when microalgae is collected, the first rods are pulled upwards so that each layer of the collecting plate is inclined at a second inclination angle with respect to the horizontal direction, in this way, deposited microalgae flows into a photo-biologic reactor from the opened second end of each layer of the collecting plate. The microalgae collecting device and the microalgae collecting method disclosed by the invention shorten the deposition time of microalgae, and make enrichment and collection of the microalgae easy; in addition, the microalgae collecting device is simple in structure, and suitable for large-scale application.

Description

technical field [0001] The invention relates to the field of microalgae production, in particular to a device and method for collecting microalgae. Background technique [0002] In the process of collecting microalgae, how to collect microalgae efficiently, quickly and at low cost is a worldwide problem. [0003] At present, microalgae collection methods include flocculation, filtration, centrifugation and sedimentation. When using the flocculation method to collect microalgae, it is necessary to add a certain amount of flocculants, which are either expensive or contain heavy metal ions. In the production of downstream products of microalgae, it is necessary to remove the toxic heavy metal ions contained in the flocculant remaining in the microalgae, resulting in complex procedures and high costs, so there are great limitations in the actual application of microalgae collection . It is not easy to collect microalgae by filtration. Due to the small size of microalgae, it i...

AI Technical Summary

Problems solved by technology

[0005] 1. The settling time is too long, which affects work efficiency;

[0006] 2. Although the settling distance can be shortened by reducing the depth of the settling tank, thereby shortening the settling time, this will reduce the volume of the settling tank, resulting in a small amount of algal liquid treatment, which still affects work efficiency

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