Patent ID: 9550690
Date: 2017-01-24
CPC Classifications: C02F

Claim:
1. A method for removing organic substances, nitrogen, and phosphorus from organic waste water, the method comprising steps of: stirring the organic waste water including organic substances, nitrogen, and phosphorus introduced into a waste water reservoir through a stirrer; transferring the organic waste water of the waste water reservoir to a first line mixer via a waste water transfer tube by means of a transfer pump and dissolving a neutralizer in a neutralizer dissolving tank, which is formed at one side of an upper portion of the waste water reservoir, together with a clear water through the stirrer, which is connected to a motor; introducing the neutralizer dissolved in the neutralizer dissolving tank into the first line mixer and mixing the neutralizer with the organic waste water; transferring the organic waste water mixed with the neutralizer via the first line mixer to the waste water reservoir to perform mixing and neutralizing actions thereof in a neutralization tank having a stirrer therein; transferring the organic waste water, which has passed through the neutralizing action in the neutralization tank, to a second line mixer and stirring a coagulant in a coagulant stirring tank, which is formed at one side of the neutralizer dissolving tank, in a multi-stage together with the clear water through a stirrer, which is connected to a motor; transferring the coagulant, which is stirred in the multi-stage in the coagulant stirring tank, to the second line mixer so as to perform a mixing action of the organic waste water mixed with the neutralizer and the coagulant and a condensing action of the organic substances, nitrogen, and phosphorus of the organic waste water; transferring the organic waste water mixed with the coagulant through the second line mixer into a first gravity concentrator so as to transfer a condensed sludge to an upper portion thereof and discharge a liquid material into an interior of a first reservoir by filtering a foreign substance through a filter having spaces of 0.05 to 1.5 mm and transferring the condensed sludge to a first vertical pneumatic dehydrator formed at one side thereof via a filter screen, which is formed at one side of the upper portion of the gravity concentrator; dehydrating liquid material from the condensed sludge, which is transferred to the first vertical pneumatic dehydrator, through a vertical dewatering screw provided inside the first vertical pneumatic dehydrator to be discharged into the first reservoir, transferring the dehydrated condensed sludge to a pressurizing dehydrator having a belt press therein, and pressurizing and dehydrating it to be discharged as a sludge in which moisture is removed; transferring the liquid material, which is introduced into the first reservoir, to a third line mixer through a quantitative transfer pump so as to condense a fine floating matter inside the liquid material, passing the liquid material, which is condensed completely by the third line mixer, through a first pressurizing floatation tank which supplies micro air through a nozzle, so as to return condensed and floated scum to the waste water reservoir via a scum reservoir, and introducing the liquid material, from which agglomerates are removed, into a digester chamber by a predetermined amount via a second reservoir through a quantitative transfer pump; storing the liquid material in the digester chamber for 1 to 7 days so as to discharge a biogas and perform a digestion reaction through an anaerobic microbe inside the digester chamber and discharging the liquid material digested completely in the digester chamber to a third reservoir through a quantitative transfer pump; transferring the liquid material, which is stored in the third reservoir, to a fourth line mixer so as to stir and mix it with the coagulant supplied from the coagulant stirring tank, transferring the liquid material mixed with the coagulant into a second gravity concentrator so as to transfer the condensed sludge to an upper portion thereof and discharge the liquid material into an interior of a fourth reservoir, and transferring the condensed sludge transferred to the upper portion thereof to a second vertical pneumatic dehydrator formed at one side thereof via a filter screen, which is formed at one side of the upper portion of the second gravity concentrator; dehydrating liquid material from the condensed sludge, which is transferred to the second vertical pneumatic dehydrator, through a vertical dewatering screw provided inside the second vertical pneumatic dehydrator to be discharged into a fifth line mixer, transferring the condensed sludge to the pressurizing dehydrator having the belt press therein, and pressurizing and dehydrating it to be again discharged as a sludge in which moisture is removed; and introducing the liquid material, which is introduced into the fourth reservoir, into a second pressurizing floatation tank which supplies micro air through a nozzle via a fifth line mixer, introducing scum condensed and floated in the second pressurizing floatation tank to the waste water reservoir via a scum reservoir, and discharging the liquid material, from which agglomerates are removed, to a waste water-disposal plant via a discharge unit.