MICROALGAE HARVEST METHOD USING BIOFLOCCULANT FROM RETURNED ACTIVATED SLUDGE AND DEVICE THEREOF

摘要

PURPOSE: A method and an apparatus for collecting microalgae using bioflocullant are provided to reduce the cost for isolating/collecting microalgae. CONSTITUTION: A method for collecting microalgae using bioflocullant using bioflocullant derived from remaining activated sludge comprises: a step of inflow of the remaining activated sludge from a secondary precipitation tank(80) to a bioflocullant collection tank(20) using an inflow pulp(10); a step of inflow nitrogen gas and air to the inside of the bioflocullant collection tank, a step of injecting carbon source to the bioflocullant collection tank using the inflow pump along a predetermined delivery line, or a step of constantly controlling nitrogen flow according to the property of microorganisms to induce additional production of the bioflocullant; a step of isolating and collecting the bioflocullant from a remaining activated sludge flock; and a step of aggregating and precipitating microalgae.