CONDENSATION METHOD OF ALGAE-CONTAINING LIQUID, ALGAE RECOVERY METHOD, ALGAE CONCENTRATION SYSTEM, AND ALGAE RECOVERY SYSTEM

PROBLEM TO BE SOLVED: To provide algae-containing liquid concentration methods, algae recovery methods, algae concentration systems, and algae recovery systems which enable more easy and efficient algae concentration or recovery, the algae being comprised in an algae-containing liquid, such as a culture medium.SOLUTION: A method comprises filtrating a dispersion in which a precoat material 4 is dispersed to laminate a precoated layer on a filtration area of a spring type filter 3, filtrating an algae-containing liquid using the spring type filter 3 whose filtration area is covered with the precoat material 4 to accumulate an algae body on the surface of the precoated layer, and peeling the precoat material 4 and algae off the filtration area by flowing a fluid backwards in the spring type filter 3 to recover an algae body. In addition, using the precoat material 4 whose specific gravity is smaller than 1, a precoated layer is laminated on the filtering area, while inhibiting surfacing of the precoat material 4 in the dispersion and while guiding the precoat material 4 toward the filtration area, by a guiding means for suppressing surfacing of a precoat material, the guiding means being provided so as to be able to advance and retract in the vertical direction.SELECTED DRAWING: Figure 5 【課題】培養液などの藻類含有液に含まれる藻類の濃縮や回収をより容易に且つ効率的に行うことを可能にする藻類含有液の濃縮方法、藻類回収方法、藻類濃縮システム、及び藻類回収システムを提供する。【解決手段】プレコート材４を分散させた分散液を濾過しバネ式フィルター３の濾過面にプレコート層を積層形成する工程と、プレコート材４で濾過面が覆われたバネ式フィルター３を用いて藻類含有液を濾過し、プレコート層の表面に藻体を集積する工程と、バネ式フィルター３に流体を逆流させてプレコート材４及び藻体を濾過面から剥がし、藻体を回収する工程とを備える。また、比重が１より小さいプレコート材４を用い、上下方向に進退自在に設けられたプレコート材浮上抑止誘導手段によって、分散液中のプレコート材４の浮上を抑止しつつ濾過面に向けてプレコート材４を誘導させながら濾過面にプレコート層を積層形成する。【選択図】図５