Algae-containing liquid concentration method, algae recovery method, algae concentration system, and algae recovery system

摘要

PROBLEM TO BE SOLVED: To provide an algae-containing liquid concentration method, an algae recovery method, an algae concentration system and an algae recovery system capable of easily and efficiently performing concentration and recovery of algae included in an algae-containing liquid such as a culture fluid.SOLUTION: The algae-containing liquid concentration method comprises: a step for filtering a dispersion fluid in which a pre-coat layer 4 is dispersed and laminating and forming a precoat layer on a filtration surface of a spring type filter 3; a step for filtering the algae-containing liquid using a spring type filter 3 whose filtration surface is covered with the pre-coat material 4 and accumulating an algae body on a surface of the pre-coat layer; and a step for making a fluid flow backward to the spring type filter 3, peeling the pre-coat material 4 and the algae body from the filtration surface and recovering the algae body. Further, the pre-coat material 4 having magnetism and whose specific gravity is equal to or more than 2.5 is used, and the pre-coat material is attracted by a magnetic substance, and the filtration surface is covered with the pre-coat material 4.SELECTED DRAWING: Figure 5