Method of separating and recovering microalgae
AssigneeKurita Water Industries Ltd.
InventorHirokazu Kaku
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Abstract
Raw water containing microalgae is introduced to a pH adjusting aggregation tank, and a soluble metal salt for generating a hardly-soluble hydroxide is added for adjusting to a predetermined pH. Subsequently, microalgae is aggregated by a precipitated hardly-soluble hydroxide, and generated aggregated flocks are separated to aggregated flocks and treated water in a solid-liquid separation tank. According to the method of separating and recovering microalgae, microalgae can be recovered from a culture solution containing microalgae without using a flocculant containing aluminum or poisonous macromolecule polymer, etc. and used as a feed additive or food additive.
Claims15
A method of separating and recovering microalgae from raw water containing microalgae, comprising:
- a hydroxide generation step for adding a soluble metal salt for generating a hardly-soluble hydroxide to raw water containing microalgae before adjusting the raw water to have pH for generating a hardly-soluble hydroxide;
- an aggregation step for aggregating microalgae by a precipitated hardly-soluble hydroxide;
- and
- a solid-liquid separation step for performing solid-liquid separation on aggregation flocks generated here.
Dependencies are inferred from the claim text.