JP2006035165A - Treating equipment of waste water containing organic material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide treating equipment of waste water containing an organic material capable of efficiently treating a super-pulverized suspension organic material by means of fermentative bacteria in a short time, drastically enhancing waste water treating ability and completely eliminating cytoplasm by means of fermentative bacteria by destroying corpse cell membrane of sludge bacteria according to super-pulverization. <P>SOLUTION: The treating equipment 1 of waste water containing an organic material comprises a pretreatment part 10 in which waste water is supplied and sedimentation and filtration are performed, an aeration part 30 in which the aeration of pretreated waste water is performed, a water discharge part 40 in which the aerated waste water is subjected to treatment for discharge and, thereafter, is discharged, a sludge tank 50 in which the sludge is supplied from the bottom part of the aeration part 30 by means of a sludge extracting pump P2 and a sludge treatment part. Further, the sludge treatment part is provided with a sludge super-pulverization part 72 in which the sludge is supplied from the sludge tank 50 by a pump P5 and the supplied sludge is super-pulverized into the level of several microns at least by the shear action according to high-rate swirling flow of at least 8 m/sec and a fermentation facilitation tank 90 which receives the supply of the super-pulverized sludge, at the same time, receives the supply of the fermentative bacteria, facilitates the fermentation, supplies fermentation liquid to the aeration part 30 and circulates the same. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a treatment facility for wastewater containing organic matter, such as sewage and wastewater from food processing plants, which is treated to reduce sludge generated from treatment of wastewater containing organic matter.

In the treatment of wastewater containing organic substances in the past, nitrogen oxides contained in organic wastewater such as sewage, human waste, and various industrial wastewaters are treated in an anaerobic treatment tank with a granular sludge bed of methane fermentation bacteria. There is a biological denitrification method in which denitrifying bacteria are propagated around granule sludge while being distributed countercurrently, and biologically reduced and denitrified (see Patent Document 1). This can granulate the microbial cells themselves to hold the microbial cells at a high density, and can be operated at a high volume load.
JP 7-290088 A

In the biological denitrification method as described above, the suspended organic matter itself of the object to be processed is a granular material or flake of about several millimeters to 0.1 millimeter, and the bacteria that act on it are in a granular state, for example, high density contact. However, the effects are limited. On the other hand, the granular sludge settled by denitrifying bacteria is formed in a short period of time, and the sludge accumulates relatively quickly as long as a stable granular sludge bed can be maintained, and the treatment of the sludge is also an important issue.

  The present invention uses a predetermined high-speed swirling water flow generated by a pump, and when water clusters and organic substances are made ultrafine by at least shearing action caused by an annular flow path composed of a plurality of cylindrical walls, Suspended organic matter with an extremely large surface area can be efficiently treated in a very short time with fermenting bacteria, and the treatment capacity of wastewater can be greatly increased, and ultrafine refinement of bacterial dead bodies that are the main constituent of sludge The cell membrane was destroyed and the cytoplasm was grown while being treated with fermenting bacteria, and it was found that sludge can be drastically reduced in volume. It is intended to provide a facility for treating wastewater containing organic matter that can be achieved with easy maintenance.

The present invention receives a supply of wastewater containing organic matter such as sewage and wastewater from a food processing plant, and a pretreatment unit that performs sedimentation and / or filtration,
An aeration unit that receives a supply of pretreated wastewater and performs aeration treatment;
A water discharge unit that receives the supply of aerated wastewater, discharges the water, and discharges the water;
A sludge tank in which sludge is supplied by a sludge extraction pump from at least one bottom of the pretreatment unit, the aeration unit, and the water discharge unit;
In the wastewater treatment facility containing organic matter having a residual sludge treatment section that receives residual sludge supplied from the sludge tank and processes the residual sludge,
The residual sludge treatment section is a sludge ultrafine refinement section that generates sludge from the sludge tank by a sludge extraction pump and generates a high-speed swirling flow, and ultrafine-treats the supplied sludge by at least a shearing action of the high-speed swirling flow When,
A fermentation accelerating tank that receives the supply of ultrafine sludge that has been subjected to ultrafine treatment from the sludge ultrafine refinement section and that receives the supply of fermentation bacteria to promote fermentation and supply the fermentation liquid to the aeration section It is characterized by being.

  In the above processing equipment, it is preferable to refine the supplied sludge to a level of several microns by ultra-miniaturization treatment.

  In the processing facility, the high-speed swirling flow is preferably at least 8 m / sec.

  In addition, the aeration unit receives wastewater from the pretreatment unit before the aeration unit, and agitates the wastewater by an underwater agitator, and receives the regulated wastewater supply from the adjustment tank by a pump. And a flow meter tank to be supplied to.

  The aeration section has a sludge extraction pump and an aeration stirrer at the bottom and a return flow rate adjustment device outside the tank, and a first aeration tank to which the fermentation liquid is supplied from the fermentation promotion tank, and a sludge extraction at the bottom. It comprises a second aeration tank having a pump and an aeration stirring device and having a membrane filtration device at the outlet.

  The drainage unit has a treated water extraction pump at the bottom, and supplies the treated water as backwash water to the membrane filtration device and the returned water as a return water to the flow meter tank, and has a pH near the water surface. It may have a meter and pH adjuster and a disinfectant injector.

  In the sludge tank, sludge is supplied from the first aeration tank by a sludge extraction pump, and sludge is supplied from the second aeration tank by a sludge extraction pump via the return flow rate adjusting device of the first aeration tank. A sludge concentration tank, and a sludge storage tank to which sludge is supplied from the sludge concentration tank by an air lift using air force supplied from a blower, and the sludge ultrafine by a sludge extraction pump from the sludge storage tank. Sludge is supplied to the conversion section.

  The sludge ultrafine refinement section is composed of a treatment tank and an ultrafine refiner, and the ultrafine refiner forms a cylindrical outer wall of the casing, concentrically inside the casing, or a cylindrical wall. By separating the inner cylindrical wall eccentrically enough to form a flow path without contacting each other, connecting the inner cylindrical wall with the casing bottom wall and forming a gap with respect to the casing ceiling wall, the cylindrical shape The annular flow path formed by the outer wall and the inner cylindrical wall communicates with the inside of the inner cylindrical wall through the gap, and the first pump contains sludge from the treatment tank to the inside of the inner cylindrical wall. The second high-speed water flow containing the sludge formed by being supplied with the first high-speed water flow and then sucked by the second pump from the inside of the inner cylindrical wall and discharged at a high speed is formed in the second water introduction part. Supplied to the annular channel, then up From the upper end of the inner cylindrical wall, it suddenly falls into the inside of the casing and collides with the bottom wall of the casing, and in the circulation channel formed over the annular channel and the inner cylindrical wall, It can have a structure in which the treated water in which the cell membrane is destroyed and the sludge is made ultrafine is partially extracted from the annular channel and supplied to the treatment tank.

  The ultra-miniaturization apparatus is formed such that the outer wall of the casing is formed in a cylindrical shape, and is formed concentrically within the casing or eccentrically to the extent that a flow path is formed without contacting the cylindrical walls. Two cylindrical walls are spaced apart, the intermediate cylindrical wall is joined to the casing ceiling wall and the casing bottom wall to form an outer annular flow path, the inner cylindrical wall is joined to the casing bottom wall and to the casing ceiling wall By forming the gap, the intermediate annular channel formed by the intermediate cylindrical wall and the inner cylindrical wall communicates with the inside of the inner cylindrical wall via the gap, and the first water introduction section is connected from the treatment tank. The first high-speed water stream containing sludge generated by the first pump is supplied to the air introduction section, where air is introduced into the first high-speed water stream as bubbles, and the first high-speed water into which the bubbles have been introduced is introduced. The velocity water stream is supplied to the intermediate annular flow path, Contains sludge that is suddenly dropped from the upper end of the inner cylindrical wall into the casing and crashes into the bottom wall of the casing, and is sucked from the inner cylindrical wall by the second pump and discharged at a high speed. The second high-speed water flow is supplied to the outer annular flow channel at the second water introduction portion, and the outer annular flow channel is further connected to the suction side of the first pump via a conduit. The cell membrane of sludge in water is destroyed by the shearing action in the intermediate annular flow path and the outer annular flow path forming the circulation path and the collision with the bottom wall of the casing. The treated water containing the refined and ultrafine sludge can be partly extracted from the outer annular channel and guided to the treatment tank.

The air introduction part is composed of an ejector using a high-speed water flow.
The high-speed water flow supplied into the annular channel defined by the cylindrical wall inside the apparatus casing is supplied to the annular channel from the tangential direction.
The said cylinder wall can have a curvature change part, such as a flat part, partially.
The fermentation accelerating tank can be supplied with fermenting bacteria continuously or intermittently from the fermentation bacteria culture apparatus.

As an effect of the present invention, in a wastewater treatment facility containing organic matter, a member is provided in a pretreatment section that receives the supply of wastewater containing organic matter such as sewage and wastewater from a food processing plant, and performs sedimentation and / or filtration. While removing hard foreign matter such as sand, cloths that cause clogging of pipes and valves, and flexible materials such as plastic bags, organic substances are treated with fermentation bacteria in the aeration section and discharged from the discharge section. The sludge generated in the aeration section is transferred from the bottom to the sludge tank by a sludge extraction pump, and the sludge is supplied from the sludge tank to the sludge ultrafine section, where a high-speed swirling flow is generated, The supplied sludge is subjected to ultrafine processing at least by the shearing action of the swirl flow, and the ultrafine sludge is sent to the fermentation accelerating tank, and the cell membrane of the bacterial dead bodies forming the sludge is destroyed by ultrafine processing. Fermentation is promoted to be the cytoplasm as a nutrient. When the supplied sludge is refined to the level of several microns with the high-speed swirling flow, the effect is extremely remarkable. In order to achieve this ultrafine size, a high-speed swirling flow of at least 8 m / sec, preferably 30 m / sec to 50 m / sec is preferable.
As a result, the volume of sludge is greatly reduced, the fermenting bacteria are propagated, the fermentation liquor is supplied to the aeration unit and circulated, and the sludge is finally extinguished by the fermenting bacteria during the circulation. Thus, in the sludge ultrafine refinement section, sludge and organic matter having a surface area that has become extremely large per unit weight due to ultrafine refinement are efficiently processed in a fermentation promotion part by fermentation bacteria in a very short time. In this way, it is possible to proliferate while treating the cytoplasm with fermenting bacteria by destroying the cell membrane of bacterial dead bodies that are the main constituent of sludge by ultra-miniaturization, and it is possible to greatly reduce the volume of sludge, The fermented liquid containing this fermenting bacterium can be supplied to the aeration unit to promote the aeration treatment of the organic matter in the wastewater, thereby greatly increasing the treatment capacity of the wastewater. In addition, the configuration for generating a high-speed swirling flow is relatively simple, and the pretreatment unit eliminates abrasion due to sand, and can be easily maintained.

  In addition, the aeration unit receives wastewater from the pretreatment unit before the aeration unit, and agitates the wastewater by an underwater agitator, and receives the regulated wastewater supply from the adjustment tank by a pump. If the flow meter tank to be supplied is provided, agglomerated organic matter is crushed and stirred in the adjustment tank to make it uniform, and then aerated as adjusted wastewater through the flow meter tank at a flow rate according to the aeration capacity of the aeration unit Pumped to the part.

  The aeration unit has a sludge extraction pump and an aeration stirrer at the bottom, a return flow rate adjustment device outside the tank, a first aeration tank in which the fermentation liquid is supplied from the fermentation promotion tank, and a sludge extraction at the bottom. When comprised of a second aeration tank having a pump and an aeration stirrer and having a membrane filtration device at the outlet, the air supplied from the blower in both aeration tanks is stirred as bubbles by the aeration stirrer Release and aeration, ie, catalytic oxidation, can be added to the wastewater, and organic substances in the wastewater are effectively eliminated by a large amount of mainly aerobic fermentation bacteria contained in the fermentation broth supplied from the fermentation accelerating tank be able to.

  The drainage unit has a treated water extraction pump at the bottom, and performs reverse cleaning of the membrane filtration device without manpower by supplying treated water as backwash water to the membrane filtration device by the pump. In addition, it can be supplied to the flow meter tank as return water so that it can be used as adjustment water for the flow meter tank and partially circulated. If a pH meter, a pH adjusting device, and a disinfectant injection device are provided near the water surface, water treated with organic matter can be discharged into a river or the like in a neutral state and a disinfected state.

  In the sludge tank, sludge is supplied from the first aeration tank by a sludge extraction pump, and sludge is supplied from the second aeration tank by a sludge extraction pump via the return flow rate adjusting device of the first aeration tank. The sludge concentration tank and the sludge storage tank to which sludge is supplied from the sludge concentration tank by the air lift that uses the air force supplied from the blower There is no need for final incineration after dehydration and drying as in the prior art. The amount transferred to the sludge concentrating tank can be adjusted by the return flow rate adjusting device according to the sludge processing capacity by ultrafine sludge.

  The sludge ultrafine refinement section is composed of a treatment tank and an ultrafine refiner, and the ultrafine refiner forms a cylindrical outer wall of the casing, concentrically inside the casing, or a cylindrical wall. If the inner cylindrical wall is spaced eccentrically enough to form a flow path without contact with each other, an annular flow path is formed between the wall and the inner cylindrical wall, and the high-speed water flow supplied thereto flows. The direction always changes, generating strong centrifugal force, strongly hitting the outer wall surface, creating a shear force between the large compressive force and laminar flow of the wall surface, and simultaneously causing cavitation by laminar flow separation from the inner wall surface Thus, it is possible to promote the ultrafine refinement of water clusters and sludge, that is, the destruction of the cell membrane of bacterial sludge and the ultrafine cytoplasm. In the circular annular channel, it is relatively easy to maintain the water flow velocity. Further, by connecting the inner cylindrical wall to the casing bottom wall and forming a gap with respect to the casing ceiling wall, the gap between the annular channel formed by the cylindrical outer wall and the inner cylindrical wall and the inside of the inner cylindrical wall is reduced. The high-speed water flow from the annular channel and simultaneously the water flow supplied from the first pump falls into the inner cylindrical wall, collides with the bottom wall of the casing and collides with the water cluster by impact force. And promote ultra-fine bubbles. Moreover, since water is sucked from the inside of the inner cylindrical wall by the second pump, the impact force of the water flow falling into the inside can be made stronger. A second high-speed water flow formed by being sucked by the second pump and discharged at a high speed is supplied to the annular channel, thereby forming a circulation channel across the annular channel and the inner cylindrical wall. Therefore, it is possible to repeatedly refine the water cluster during circulation, destroy the cell membrane of sludge bacterial dead bodies in the water stream, and ultrafine the internal cytoplasm. A part of the treated water containing the bacterial dead bodies of the ultrafine sludge is extracted from the annular channel and supplied to the treatment tank.

  The outer wall of the casing of the treated water supply device is formed in a cylindrical shape, and the intermediate and inner cylindrical walls are separated so as to be concentric inside the casing or eccentric so as to form a flow path without contacting the cylindrical walls. If provided, an outer and intermediate annular channel is formed between the outer, intermediate and inner cylindrical walls. The high-speed water flow supplied to these external and intermediate annular channels constantly changes the flow direction to generate a strong centrifugal force and strongly hits the outer wall surface, causing a large compressive force and a shear force between the laminar flow on the wall surface. At the same time, laminar flow separation is caused from the inner wall surface to generate a cavitation action, and it is possible to promote the ultrafine sludge, that is, the destruction of the cell membrane of the dead bacterial sludge and the ultrafine cytoplasm. In the circular annular channel, it is relatively easy to maintain the water flow velocity. Further, when the intermediate cylindrical wall is connected to the casing ceiling wall and the casing bottom wall, the inner cylindrical wall is connected to the casing bottom wall and a gap is formed with respect to the casing ceiling wall, the water flow supplied to the intermediate annular channel is The water drops suddenly from the top of the wall to the inside, and the impact force generated by crashing into the bottom wall of the casing promotes ultra-fine water clusters and sludge. Bubbles are introduced into the water flow by an ejector action using the first high-speed water flow generated by the first pump in the air introduction portion of the first water introduction portion in the water introduction portion. Air absorbed in water strongly generates the above cavitation action. The first high-speed water flow into which the bubbles are introduced is supplied to the intermediate annular flow path, and then suddenly falls into the inside from the upper end of the inner cylindrical wall as described above and collides with the casing bottom wall. Since it is sucked by the second pump from the inside of the wall, the impact of the water flow falling into the inside can be made stronger. A second high-speed water flow formed by being sucked and discharged at a high speed by the second pump is supplied to the outer annular flow path at the second water introduction portion, and further from the outer annular flow path to the first pump A circulation path is formed by being supplied to the suction side via a pipe line. By repeating the cycle, it is possible to make the cluster ultrafine and sludge ultrafine. A portion of the treated water containing ultrafine sludge is extracted from the outer annular channel and supplied to the treatment tank.

The air introduction part is composed of an ejector that uses a high-speed water flow, and without using an air pump, air can be sucked and mixed into the water flow by the negative pressure generated by the high-speed water flow ejected from the nozzle of the ejector. it can.
The high-speed water flow that is supplied into the annular flow path limited by the cylindrical wall inside the device casing is supplied to the annular flow path from the tangential direction, smoothly supplying the water flow into the annular flow path, It prevents catastrophic changes and helps maintain the above action of high velocity water flow throughout the path.

When the cylindrical wall partially has a curvature changing part such as a flat part, the water flow speed slightly decreases at these curvature changing parts, but the shear force acting between the water flow layers can be increased by changing the direction of the water flow.
When the fermentation accelerating tank is configured to be continuously or intermittently supplied with the fermenting bacteria from the fermentation bacteria culturing apparatus, a large amount of vigorous fermenting bacteria are continuously added according to the fermentation state of the fermentation accelerating tank. Or intermittently to the fermentation promoting layer.

  As shown in FIG. 1, a wastewater treatment facility 1 containing organic matter such as sewage according to a representative embodiment of the present invention receives supply of wastewater WW containing organic matter from a wastewater generation site by a pump or a water head difference. In addition, the sand removal tank 10 as a pretreatment unit that removes dirt in the sand trapping layer 17 after removing dust with a coarse scraper or a screen in advance and sets the sand, and the supply of pretreated waste water are received. The adjustment tank 20 that stirs the wastewater by the underwater agitator 21, and the adjustment wastewater is supplied from the adjustment tank 20 by the submersible pump P 1, and the partial return water is supplied from the subsequent part, and the aeration unit 30 A flow meter tank 25 to be supplied to an aeration unit, an aeration unit 30 which receives supply of adjusted waste water at a predetermined flow rate and receives fermentation bacteria and performs contact oxidation and fermentation bacteria treatment of floating organic matter, and supply of waste water subjected to aeration treatment Receiving And a sludge concentration tank 50 to which sludge is supplied by a sludge extraction pump P2 from the bottom of the aeration unit 30, and the sludge. A treatment tank 71 to which sludge is supplied by the sludge extraction pump P3 from the sludge storage tank 55 so as to be supplied and stored with the supply of the concentrated sludge from the concentration tank 50 and supplied to the treatment tank 71 for fermenting sludge. A high-pressure pump (not shown) sucks the sludge water flow from the treatment tank 71 to generate a high-speed swirling flow of at least 8 m / sec, and feeds sludge and organic matter by several microns by at least the shearing action of the high-speed swirling flow. Sludge ultrafine refinement unit 70 composed of sludge ultrafine refiners 72 and 80 that make ultrafine before and after, and sludge ultrafine from sludge ultrafine refinement unit 70, that is, bacterial death of sludge A water stream containing a sludge tank in a state where the cell membrane is destroyed and the cytoplasm is also made ultrafine is supplied, receives fermentation bacteria from the fermentation bacteria culture device 95, promotes fermentation, and transfers the fermentation liquid to the aeration unit 30. It has a sludge fermentation treatment line C comprising a fermentation promotion tank 90 to be supplied. In the past, residual sludge was supplied from the sludge storage tank 55, and sludge was dehydrated and dried for incineration. Sludge comprising a dehydration drying unit 60 and an incinerator 65 as a final treatment unit for this purpose. Incineration line B became unnecessary in this embodiment by sludge ultrafine refinement and fermentation promotion.

  The sand settling tank 10 is installed above the main tank 11, a coarse material hoisting machine 12 for removing coarse objects floating therein, an auxiliary tank 13 adjacent to the main tank 11, and the main tank 11. 13 is provided with a sand surplus layer 17 which receives air supply from the aeration submerged blower 14 from the bottom of the inside 13 and is supplied with dirty wastewater by the submersible pump 16 while being aerated and stirred by the aeration and stirring device 15. The sand in the sand overlayer 17 is periodically replaced.

  The aeration unit 30 includes a sludge extraction pump P2 at the bottom, an aeration stirrer 33 that receives air supply from the blower 32 and aeration stirrer, and a sludge return flow rate adjustment unit 34 outside the tank, and is processed by fermentation bacteria. The first aeration tank 31 in which the sludge and the fermented liquid containing the organic matter and the fermenting bacteria are supplied from the fermentation promotion tank 90, and arranged in series in this, the bottom sludge extraction pump P2 and the above A second aeration tank 35 having the same aeration and stirring device 33 and having a membrane filtering device 36 at the outlet is formed. In the aeration unit 30, the floating organic matter in the wastewater is subjected to a cancellation process by contact oxidation with a large amount of fermentation bacteria in the fermentation liquid supplied from the fermentation promotion tank 90 and bubbles from the blower 32. Moreover, sludge of dead bodies of bacteria such as luminescent bacteria that sink and accumulate at the bottom is extracted by the sludge extraction pump P2 and transferred to the sludge concentration tank 50, while the sludge from the second aeration tank 35 is returned to the flow rate adjusting device 34. Is partially returned to the first aeration tank 31. Therefore, most of the sludge transferred to the sludge concentration tank 50 is from the first aeration tank 31 having the largest accumulation rate, but when the shortage occurs, the return flow rate adjusting device 34 sets the sludge. Those from the two aeration tanks 35 are added. The intermediate wastewater that has been removed by the treatment of organic matter and sludge is filtered through the membrane filtering device 36 and then transferred from the first aeration tank 31 to the second aeration tank 35. From the 2nd aeration tank 35, it transfers to the water discharge part 40 as processed water. Transfer of waste water after the measuring tank 25 is performed by a pushing head into the measuring tank 25.

  The water discharge unit 40 has a treated water extraction pump P4 at the bottom, and supplies treated water as backwash water to the membrane filtration device 36 by the pump P4, and automatically or periodically according to the differential pressure. The membrane filtration device 36 is back cleaned. Further, a pH meter 41, a pH adjusting device 42, and a disinfectant injection device 43 are provided near the water surface, and the treated water 0W can be discharged into the river.

  In the sludge concentration tank 50 prepared as a sludge tank, the return flow rate of the first aeration tank 31 by the sludge extraction pump P2 from the first aeration tank 31 and the sludge extraction pump P2 from the second aeration tank 35 is adjusted. The metering sludge via the device 34 is supplied. In the sludge concentration tank 50, sludge rich in fluidity is supplied to the sludge storage tank 55 by the air lift 52 using the air force supplied from the blower 51. The sludge still contains enough waste water and is fluid enough to be transferred with a general centrifugal pump. All the sludge is sent from the sludge storage tank 55 to the treatment tank 71, and is subjected to a sludge cancellation process using fermentative bacteria as described later. Since it became clear that all the sludge was canceled by the fermenting bacteria, the sludge was transferred from the sludge storage tank 55 to the dehydrator 61 of the dehydration drying unit 60 by the pump P5, and after being aggregated by the coagulant from the coagulant injection machine 62, It is no longer necessary to be conveyed to the hot air dryer 65 by the belt conveyor 64 and incinerated in the incinerator 67. Therefore, the deodorizing device 66 in the exhaust part of the hot air dryer 65 is also unnecessary.

  The sludge ultrafine refinement unit 70 includes a processing tank 71 and ultrafine refiners 72 and 80. As shown in FIG. 2, the ultrafine refiner 72 of the first embodiment is configured so that the wastewater stream W <b> 1 supplied at a high speed by a high-pressure submersible pump (not shown) inside the treatment tank 71 is present inside the apparatus casing 73. The high-speed water flow W2 is supplied to the inside of the cylindrical wall 76 defined by the cylindrical wall 74, and further into the annular flow path 75 outside the cylindrical wall 74 by the high-pressure second pump 2P, at least 8 m / second, preferably 30 m / second. Supplied at a flow rate of more than a second, the water cluster is refined by impact force at the flow direction change part, shear force at the cylinder wall surface and cavitation action, and sludge in the water stream, that is, bacterial sludge in the sludge is around several microns Then, the bacterial cell membrane is destroyed and contained in the water flow after being ultrafine, and then returned to the treatment tank 71 from the water discharge unit 79 as treated water W3.

  The sludge ultrafine refiner 72 of this first form forms the outer wall 73a of the casing 73 in a cylindrical shape, and concentrically separates the inner cylindrical wall 74 inside the casing, and the lower end of the inner cylindrical wall 74 is By connecting to the casing bottom wall 73b and forming a gap C with respect to the casing ceiling wall 73c, an annular flow path 75 formed by the cylindrical outer wall 73a and the inner cylindrical wall 74 and an inner part 76 of the inner cylindrical wall 74 are formed. It communicates through the gap C. A high-speed water flow W1 containing sludge supplied by a high-pressure submersible pump inside the treatment tank 71 is supplied from the center of the casing ceiling wall 73c of the first water introduction part to the inside 76 of the internal cylindrical wall 74. Next, the apparatus 72 introduces a second water introduction in which a second high-speed water flow W2 formed by being sucked and discharged at a high speed by the second pump 2P from the lower part of the inner cylindrical wall inside 76 is provided at the lower part of the casing outer wall 73a. The portion 77 is supplied to the annular flow path 75 from a substantially tangential direction, and then suddenly falls from the gap C at the upper end of the inner cylindrical wall 74 to the inside 76 to collide with the casing bottom wall 73b. In the circulation channel formed across the channel 75 and the inner cylindrical wall interior 76, the water cluster is made ultrafine by the above-described action, and the sludge and the organic matter in the water flow are made ultrafine, and the ultrafine sludge and the organic matter are removed. A part of the contained treated water W3 is removed from the annular flow path and returned to the treatment tank 71 at a water discharge part 79 provided on the upper part of the casing outer wall 73a.

  In addition, the degree to which the water flow W2 is repeatedly passed through the circulation flow path can be increased by increasing the gap C, reducing the water discharge amount in the water discharge section 79, or increasing the amount of waste water containing sludge, and combining them in combination. If the degree of repeated circulation is reduced, the opposite adjustment is performed. The casing 73 separates the bottom wall 73b into two stages, but it goes without saying that the bottom wall 73b can be integrated with the lower end level of the internal cylindrical wall 74. It is also possible to provide the inner cylindrical wall 74 in an eccentric manner to such an extent that the flow path 75 is formed so that the cylindrical walls do not contact each other and the flow cross section does not change much. Furthermore, the casing outer wall 73a and the inner cylindrical wall 74 can partially have a curvature changing portion such as a flat portion, or a vertically long slit can be formed in the inner cylindrical wall 74. It can be configured to increase the shear force.

  As shown in FIG. 3, the treated water supply apparatus 80 according to the second embodiment forms an outer wall 83a of a casing 83 in a cylindrical shape, and concentrically forms an intermediate cylindrical wall 84A and an inner cylindrical wall 84B inside the casing. The upper end of the intermediate cylindrical wall 84A is coupled to the casing ceiling wall 83c, the lower end is coupled to the casing bottom wall 83b to form an outer annular flow path 85A, and the lower end of the inner cylindrical wall 84B is coupled to the casing bottom wall 83b. In addition, by forming a gap C with respect to the casing ceiling wall 83c, the intermediate annular channel 85B formed by the intermediate cylindrical wall 84A and the inner cylindrical wall 83B and the inner cylindrical wall interior 86 are communicated with each other via the gap C. ing. Moreover, in the 1st water introduction part 81 of the water introduction parts, the 1st high speed water flow which generate | occur | produced by attracting the sludge containing waste water w inside the processing tank 71 with the 1st high pressure pump 1P arrange | positioned near the apparatus 80 is carried out. W0 is supplied to the ejector 82 of the air introduction section, where air A is introduced as bubbles into the first high-speed water flow W0, and the high-speed water flow W1 into which the bubbles are introduced is supplied to the intermediate annular channel 85B from the tangential direction. Then, it is suddenly dropped from the upper end of the inner cylindrical wall 84B to the inner part 86 to collide with the casing bottom wall 83b, and is sucked from the inner cylindrical wall part 86 by the second high-pressure pump 2P and discharged at a high speed. The formed second high-speed water flow W2 is supplied from the tangential direction to the outer annular flow path 85A by the second introduction portion 87. The apparatus 80 further causes the water flows W1 and W2 to flow repeatedly in a circulation path formed by connecting the outer annular flow path 85A to the suction side of the first pump 1P via the pipe line p. The water cluster is refined and the sludge and organic matter in the stream are refined by shearing action and cavitation work in the intermediate annular flow path 85B and the outer annular flow path 85A and the collision with the casing bottom wall 83b. Then, the treated water W3 containing ultrafine bubbles is partially removed from the outer annular channel 85A in the water discharge part 89 and returned to the treatment tank 71.

  In addition, the degree to which the water flows W1 and W2 are repeatedly circulated increases the gap C, reduces the water discharge amount in the water discharge portion 89, increases the water introduction amount in the first water introduction portion 81, and the first pump 1P. When the valve V1 on the suction side is throttled and the valve V2 of the pipe line p is opened wide, and they can be combined and increased, and the degree of repeated circulation is reduced, the reverse adjustment is performed. The casing 83 separates the bottom wall 83b into two stages, but it goes without saying that the bottom wall 33b can be integrated with the lower end levels of the intermediate and inner cylindrical walls 84A and 84B. The intermediate and inner cylindrical walls 84A and 84B can be provided eccentrically so that the flow paths 85A and 85B are formed without contacting the cylindrical walls. The casing outer wall 83a and the intermediate and inner cylindrical walls 84A and 84B can partially have a curvature changing portion such as a flat portion, or can form a vertically long slit in the intermediate and inner cylindrical walls 84A and 84B. It can comprise so that the impact force and shear force in the said part may be raised.

  As shown in FIG. 1, the waste water containing ultrafine sludge and organic matter is transferred from the treatment tank 71 to the fermentation promotion tank 90 by the pump P6, and then in the fermentation promotion tank 90, the fermentation bacteria culture apparatus. A large amount of fermentative bacteria is supplied from 95, and the catalytic oxidation and aerobic fermentation are dramatically promoted against ultrafine sludge in wastewater containing a large amount of bubbles and containing a large amount of dissolved oxygen, A large amount of sludge and organic matter are processed. A batch system in which the fermentation is accelerated for 3 days is preferable, but continuous operation is also possible. The fermenter culturing apparatus 95 is supplied by an inoculum tank 96 containing a fermenter species such as Lactobacillus, an additive tank 97 containing an additive containing molasses, and clean water, and is generated by a high-pressure pump P9. The water ultrafine refiner 98 (which has the structure of the ultrafine refiners 72 and 80 described above) that refines the water cluster by the shear force due to the impact force of the high-speed water flow, the large water flow velocity difference, and the ultrasonic waves of bubble bursting. Fermenting bacteria that culture fermenting bacteria in large quantities by supplying fermenting bacterial species from the inoculating tank 96, additives from the additive tank 97, and ultra-miniaturized water from the water refining device 98, respectively. It comprises a culture tank 99 for inoculum. The cultured fermented bacteria are supplied to the fermentation promoting tank 90 by the pump P10. As fermentative bacteria, Lactobacillus bacteria, lactic acid bacteria, yeasts, butyric acid bacteria, natto bacteria, etc. collected in the field are generally added, and photosynthetic bacteria taking a symbiotic relationship are also added. The photosynthetic bacteria supply the necessary substances with the fermenting bacteria to speed up the culture.

  As is clear from the above description, in the present invention, the supplied sludge is refined to a level of several microns with a high-speed swirling flow, preferably at least 8 m / sec, more preferably about 30-50 m / sec. However, compared with the case where the above-mentioned refinement process is not performed, the present invention has the effect of finally eliminating sludge. When the conventional refinement process is not performed, a remarkable sludge volume reduction process can be realized as compared with the case where the incineration process is necessary.

The schematic explanatory drawing of the treatment facility of the wastewater containing the organic substance of typical embodiment of this invention. The rough explanatory elevation view of the partial cross section which shows the structure of the ultrafine-fabrication apparatus of the 1st form of the aeration processing equipment. The rough explanatory elevation view of the partial cross section which shows the structure of the ultrafine-fabrication apparatus of the 2nd form of the aeration processing equipment.

Explanation of symbols

1: Treatment facility for waste water containing organic substances 10: Pretreatment section (sand-sink tank)
20: Adjustment tank 21: Underwater stirrer 25: Flow meter tank 30: Aeration unit 31: First aeration tank 33: Aeration agitation device 34: Return flow rate adjustment device 35: Second aeration tank 36: Membrane filtration device 40: Water discharge Unit 41: pH meter 42: pH controller 43: Disinfectant injection device 50: Sludge tank (sludge concentration tank)
51: Blower 52: Air lift 55: Sludge storage tank 71: Treatment tank 72: Ultrafine refinement device 73b of the first form: Casing bottom wall 74: Internal cylindrical wall 75: Annular channel 76: Inside of the internal cylindrical wall 80: Second embodiment of ultrafine device 82: air introduction part 83b: casing bottom wall 84A: intermediate cylindrical wall 84B: inner cylindrical wall 85A: outer annular channel 85B: intermediate annular channel 90: fermentation promotion tank 95: fermentation bacteria culture Apparatus P1: Pump P2: Sludge extraction pump P3: Sludge extraction pump P4: Treated water extraction pump WW: Waste water W3: Treated water

Claims (13)

A pre-treatment unit that receives sandwater and wastewater containing organic matter such as wastewater from food processing plants, and performs sedimentation and / or filtration;
An aeration unit that receives a supply of pretreated wastewater and performs aeration treatment;
A water discharge unit that receives the supply of aerated wastewater, discharges the water, and discharges the water;
A sludge tank in which sludge is supplied by a sludge extraction pump from at least one bottom of the pretreatment part, the aeration part and the water discharge part,
In the wastewater treatment facility containing organic matter having a residual sludge treatment section that receives residual sludge supplied from the sludge tank and processes the residual sludge,
The residual sludge treatment section is a sludge ultrafine refinement section that is supplied with sludge by a sludge extraction pump from the sludge tank and causes a high-speed swirling flow to ultrafine-fine the supplied sludge by a shearing action of the high-speed swirling flow When,
A fermentation accelerating tank that receives the supply of ultrafine sludge that has been subjected to ultrafine treatment from the sludge ultrafine refinement section and that receives the supply of fermentation bacteria to promote fermentation and supply the fermentation liquor to the aeration section Wastewater treatment equipment containing organic substances characterized by   The treatment equipment according to claim 1, wherein the supplied sludge is refined to a level of several microns by the ultra-miniaturization treatment.   The processing facility according to claim 1, wherein the high-speed swirling flow is at least 8 m / sec.   In addition, the aeration unit receives wastewater from the pretreatment unit before the aeration unit, and agitates the wastewater by an underwater agitator, and receives the regulated wastewater supply from the adjustment tank by a pump. The processing equipment according to claim 1, further comprising a flow meter tank to be supplied to the apparatus.   The aeration section has a sludge extraction pump and an aeration stirrer at the bottom and a return flow rate adjustment device outside the tank, and a first aeration tank to which the fermentation liquid is supplied from the fermentation promotion tank, and a sludge extraction at the bottom. The processing equipment according to claim 1, comprising a second aeration tank having a pump and an aeration stirring device and having a membrane filtration device at the outlet.   The water discharge unit has a treated water extraction pump at the bottom, and supplies the treated water as backwash water to the membrane filtration device and the returned water to the flow meter tank by the pump, and has a pH near the water surface. The processing facility according to claim 1, further comprising a meter, a pH control device, and a disinfectant injection device.   In the sludge tank, sludge is supplied from the first aeration tank by a sludge extraction pump, and sludge is supplied from the second aeration tank by a sludge extraction pump via the return flow rate adjusting device of the first aeration tank. A sludge concentration tank, and a sludge storage tank to which sludge is supplied from the sludge concentration tank by an air lift using air force supplied from a blower, and the sludge is extracted from the sludge storage tank by a sludge extraction pump. The processing equipment according to claim 5, wherein sludge is supplied to the ultrafine refinement section.   The sludge ultrafine refinement unit is composed of a treatment tank and an ultrafine refiner, and the ultrafine refiner forms a cylindrical outer wall of the casing and concentrically within the casing, or By separating the inner cylindrical wall eccentrically so as to form a flow path without contacting the cylindrical walls, connecting the inner cylindrical wall with the casing bottom wall and forming a gap with respect to the casing ceiling wall, An annular flow path formed by a cylindrical outer wall and an inner cylindrical wall communicates with the inside of the inner cylindrical wall through the gap, and sludge is passed from the treatment tank to the inside of the inner cylindrical wall by a first pump. The second high-speed water flow containing the sludge formed by supplying the first high-speed water flow and then sucking it from the inside of the inner cylindrical wall and discharging it at a high speed In the annular channel, The inner cylindrical wall is suddenly dropped from the upper end of the inner cylindrical wall so as to collide with the bottom wall of the casing, and in the circulation channel formed over the annular channel and the inner cylindrical wall, The treatment facility according to claim 1, wherein the treatment facility has a structure in which sludge cell membranes are destroyed, and the treated water with ultrafine sludge is partially extracted from the annular channel and supplied to the treatment tank.   The ultra-miniaturization apparatus has an outer wall of the casing formed in a cylindrical shape, and is formed concentrically inside the casing or in an eccentric shape so as to form a flow path without contact between the cylindrical walls. Two cylindrical walls are spaced apart, the intermediate cylindrical wall is joined to the casing ceiling wall and the casing bottom wall to form an outer annular flow path, the inner cylindrical wall is joined to the casing bottom wall and to the casing ceiling wall By forming the gap, the intermediate annular flow path formed by the intermediate cylindrical wall and the inner cylindrical wall communicates with the inside of the inner cylindrical wall via the gap, and the first water introduction section from the treatment tank The first high-speed water stream containing sludge generated by the first pump is supplied to the air introduction section, where air is introduced into the first high-speed water stream as bubbles, and the first high-speed water into which the bubbles have been introduced is introduced. A velocity water stream is supplied to the intermediate annular channel, Contains sludge that is suddenly dropped into the inside of the inner cylindrical wall from the upper end of the inner cylindrical wall and collides with the bottom wall of the casing, and is sucked from the inner cylindrical wall by the second pump and discharged at a high speed. The second high-speed water flow is supplied to the outer annular flow channel at the second water introduction portion, and further formed by connecting the outer annular flow channel to the suction side of the first pump via a conduit. The cell membrane of the sludge in the water is destroyed by the shearing action in the intermediate annular passage and the outer annular passage and the collision with the casing bottom wall. The treatment equipment according to claim 8, wherein the treatment water containing refined and ultrafine sludge is partially extracted from the outer annular channel and guided to the treatment tank.   The processing equipment according to claim 9, wherein the air introduction unit is configured by an ejector using a high-speed water flow.   The processing equipment according to claim 9 or 10, wherein a high-speed water flow supplied into an annular flow path defined by a cylindrical wall inside the apparatus casing is supplied to the annular flow path from a tangential direction.   The processing equipment according to claim 8 or 9, wherein the cylindrical wall partially has a curvature changing portion such as a flat portion. The processing equipment according to claim 1, wherein the fermentation accelerating tank receives supply of fermenting bacteria continuously or intermittently from a fermentation bacteria culture apparatus.

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