APPARATUS AND METHOD FOR CULTIVATING MICRO-ALGAE WITH SLUDGE TREATMENT EFFLUENT

摘要

The present invention relates to an apparatus and a method for cultivating microalgae using sludge treatment effluent which can minimize discharge of surplus sludge by: using effluent including high concentrate of nitric nitrogen generated by a sludge process for culturing microalgae by combining high class sewage disposal process, sludge treatment process, and microalgae culturing process; and an aerobic sludge treatment process by complex fermentation of microorganisms. The apparatus for cultivating microalgae using sludge treatment effluent according to the present invention comprises: a high class sewage disposal device, a sludge treatment device, and a microalgae cultivating device. The sludge treatment device comprises: a first aeration tank which is operated under an aerobic condition and ferments sludge; a second aeration tank which is operated under the aerobic condition while more air is injected than the first aeration tank and decomposes sludge by increasing activities of complex fermentation of microorganisms; and an MBR tank which biologically removes high concentrate of organic matters by being supplied with outflow of the second aeration tank by activities of aerobic microorganisms, and removes total solid matters using a separation film. Thickened sludge and effluent are separated by the MBR tank; the effluent is supplied to the microalgae cultivating device; the thickened sludge is returned back to the second aeration tank; and concentration of nitric nitrogen is increased in the first aeration tank, second aeration tank, and MBR tank in order.