Microalgae harvesting device and microalgae harvesting method

Abstract

The invention relates to the technical field of microalgae biology, and provides a microalgae harvesting device and a microalgae harvesting method. The microalgae harvesting device comprises a squeezing unit, wherein the squeezing unit comprises a first chamber (1), a second chamber (2) and a filtering unit for separating the first chamber (1) from the second chamber (2); a feeding hole (3) for introducing microalgae is formed in the first chamber (1); an extraction opening (4) is formed in the second chamber; and the squeezing unit is arranged to squeeze the microalgae in the first chamber byvacuumizing from the extraction opening so as to adsorb the microalgae on the filtering unit. According to the microalgae harvesting device, the microalgae in the first chamber can be squeezed so asto adsorb the microalgae on the filtering unit, and a biological membrane is formed by compressing and vacuumizing multicellular algae, so that unicellular algae can be quickly harvested; by squeezingof the device, the unicellular algae can be quickly harvested, the harvesting efficiency is improved, the harvesting cost is reduced, and the solid content of a filter cake is high.

Description

technical field [0001] The invention relates to the field of microalgae biotechnology, in particular to a microalgae harvesting device and a microalgae harvesting method. Background technique [0002] Efficient harvesting of microalgae biomass is a prerequisite for its processing, transformation and utilization. Generally speaking, the cost of microalgae harvesting accounts for 20%-30% of the total cost of microalgae production. The existing microalgae harvesting methods mainly include: centrifugation, flocculation and air flotation, membrane filtration, etc., and a more suitable separation method should be selected according to the difference in algae species, different algae concentrations and culture conditions. Among them, the centrifugation method has high harvesting efficiency, but the cost is also high; the biomass obtained by flocculation and air flotation has high water content, which increases the load of subsequent drying; the membrane filtration process is very e...

AI Technical Summary

Problems solved by technology

Among them, the centrifugal method has high harvesting efficiency, but the cost is also high; the biomass obtained by flocculation and air flotation has high water content, which increases the load of subsequent drying; the membrane filtration process is very easy to cause membrane pollution, and the concentration ratio is low

Moreover, single cells cannot be harvested using butterfly centrifuges and membranes due to their particular size and shape of cell walls (using butterfly centrifuges will damage their cell walls and make it impossible to collect complete cells

Because the cell shape is fusiform and triangular radial, the membrane system or the plate and frame filter press are clogged and cannot be harvested)

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