JP2011072982A - Sewage treatment system and fine air bubble generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sewage treatment system and a fine air bubble generator capable of purifying sewage water favorably. <P>SOLUTION: The sewage water is stored in a purification tank (1) placed outdoors with its upper part open, the sewage water is purified by providing fine air bubbles for the purification tank (1) by means of fine air bubble generators (7, 25, 37), the water after purification is stored in a sedimentation tank (11) for sedimentation and separation, the separated solid matter is reduced to the purification tank (1), and meanwhile, the separated liquid matter is stored in an ultrasonic treatment tank (15) and the liquid matter is purified by providing fine air bubbles to which ultrasonic vibration is applied for the ultrasonic treatment tank (15) by using an ultrasonic generator (18). The fine air bubble generators (25, 37) are configured in such a manner that they blow compressed air toward inclined collision plates (28, 39) which freely rock back and forth, they cause the collision plates (28, 39) to vibrate by the pulsation of the compressed air, they generate fine air bubbles on the surface of the collision plates (28, 39), and they supply vibrated fine air bubbles. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a sewage treatment system and a fine bubble generator.

  Conventionally, factory wastewater and domestic wastewater have been treated by sewage treatment and purified, and then discharged into rivers and the like.

  Various sewage treatment systems for this purpose have been considered. For example, in the sewage treatment system disclosed in Patent Document 1, fine bubbles are supplied to a treatment tank in which sewage is stored and ultrasonic vibrations are simultaneously applied. The sewage was purified by the energy of the fine bubbles and the ultrasonic waves.

JP 2007-275694 A

  However, in the conventional sewage treatment system, since the ultrasonic vibrations are simultaneously given to the treatment tank together with the fine bubbles, even bacteria having an action of purifying the sewage inside the treatment tank are killed. On the other hand, the processing efficiency of sewage purification is reduced, and this increases the time and cost required for sewage treatment.

Therefore, in the present invention according to claim 1, in the sewage treatment system, the sewage is stored in a septic tank opened outdoors and the sewage is purified by supplying fine bubbles to the septic tank. It is stored in a sedimentation tank and separated by precipitation, and the separated solid is reduced to the septic tank, while the separated liquid is stored in an ultrasonic treatment tank and ultrasonic vibration is generated in the ultrasonic treatment tank by an ultrasonic generator. We decided to purify the liquid by supplying the fine bubbles.
Further, in the present invention according to claim 2, in the present invention according to claim 1, the ultrasonic generator blows compressed air toward an inclined collision plate that can swing back and forth to compress the collision plate. The ultrasonic vibration is generated by the pulsation of the air, the fine bubbles are generated on the surface of the collision plate, and the fine bubbles that are ultrasonically vibrated are supplied.
Further, in the present invention according to claim 3, in the fine bubble generator for generating fine bubbles, the compressed air is blown toward the inclined collision plate that can swing back and forth, and the collision plate is pulsated by the compressed air. It was decided to generate the fine bubbles on the surface of the collision plate and to supply the vibrated fine bubbles.

  And in this invention, there exists an effect described below.

That is, in the present invention, in the sewage treatment system, the sewage is stored in a septic tank that is opened outdoors and the sewage is purified by supplying fine bubbles to the septic tank with a fine bubble generator. It is stored in a sedimentation tank and separated by precipitation, and the separated solid matter is reduced to the septic tank, while the separated liquid substance is stored in an ultrasonic treatment tank, and fine bubbles that are ultrasonically vibrated in the ultrasonic treatment tank are collected. Since it is decided to purify the liquid by supplying it, it is possible to purify the sewage by effectively functioning without killing the bacteria inside the septic tank. Since the oil content of the water can be decomposed satisfactorily, the sewage can be purified well.
In particular, the fine bubble generator is blown with compressed air toward an inclined collision plate that can swing back and forth, and the collision plate is vibrated by the pulsation of the compressed air, and fine bubbles are generated and vibrated on the surface of the collision plate. In the case where the fine bubbles are supplied, not only purification of sewage but also deodorization, sterilization, hydrogenation and the like can be performed.

Explanatory drawing which shows the sewage treatment system which concerns on this invention. Plan sectional drawing (a) and side sectional view (b) showing a fine bubble generator. Plan sectional drawing (a), side sectional view (b), and rear view (c) showing a fine bubble generator.

  The specific configuration of the sewage treatment system according to the present invention will be described below with reference to the drawings.

  The sewage treatment system according to the present invention stores sewage in a septic tank with an open top installed outside, and supplies sewage by supplying fine bubbles to the septic tank, and after purifying in the sewage purification process A sedimentation separation step for storing and separating sewage in a sedimentation tank, a sewage reduction step for reducing the solids separated in the precipitation separation step to the septic tank, and a separated liquid material in an ultrasonic treatment tank, An ultrasonic treatment process for purifying a liquid substance by supplying fine bubbles which are ultrasonically vibrated into an ultrasonic treatment tank.

  In the sewage purification process, as shown in FIG. 1 (a), the sewage supplied from the drain pipe 2 is stored through the sand settling tank 22 in the septic tank 1 which is opened outdoors and irradiated with direct sunlight. The fine bubbles are supplied into the septic tank 1 and the sand settling tank 23 by using the fine bubble supply mechanism 3. In the sewage purification process, the septic tank 1 may be provided in a plurality of stages.

  Here, the fine bubble supply mechanism 3 connects the supply pipe 5 to the rotary blower 4, connects a plurality of branch pipes 6 to the supply pipe 5, and arranges the tip of each branch pipe 6 at the bottom of the septic tank 1. In addition, a fine bubble generator 7 is connected to the tip of each branch pipe 6.

  The fine bubble generator 7 is disposed at the bottom of the septic tank 1 with an interval from the upstream side to the downstream side, and as shown in FIG. A collision plate 9 made of zinc) is attached in an inclined shape, and compressed air compressed by the rotary blower 4 is blown toward the collision plate 9 from the nozzle 10 at the tip of the branch pipe 6, and fine bubbles are generated on the surface of the collision plate 9. The fine bubbles are supplied to the inside of the sewage generated and stored in the septic tank 1.

  In this sewage purification process, oxygen is supplied into the sewage by the action of the fine bubbles supplied using the fine bubble supply mechanism 3, and the filth in the sewage is decomposed to purify the sewage.

  Moreover, in the sewage purification process, bacteria that feed on filth are propagated inside the septic tank 1, and the filth is decomposed by the action of the bacteria. To purify.

  In the sedimentation separation process, as shown in FIG. 1 (a), purification is performed in the septic tank 1 supplied from the septic tank 1 through the communication pipe 12 to the sedimentation tank 11 that is open to the outside and irradiated with direct sunlight. The sewage after being stored is stored and allowed to stand for a predetermined time, and is separated into a liquid material composed of the supernatant and a solid material composed of the precipitate in the sedimentation tank 11.

  Here, an aeration type pump 13 using the air supplied from the supply pipe 5 is immersed in the settling tank 11, and the solid precipitated at the bottom of the settling tank 11 by the transfer pipe 14 using this pump 13. An object can be transferred to the septic tank 1.

  In the sewage reduction process, as shown in FIG. 1 (a), the sewage stored in the settling tank 11 is transferred from the settling tank 11 to the upstream side of the septic tank 1 by the transfer pipe 14 using the pump 13 while stirring. The solid matter separated in the precipitation separation step and precipitated at the bottom of the precipitation tank 11 is reduced to the septic tank 1 together with the liquid substance.

  In addition, the sewage returned to the septic tank 1 in the sewage reduction process is purified again in the sewage purification process.

  In the ultrasonic treatment step, as shown in FIG. 1 (a), by transferring a liquid material, which is the supernatant of the sewage stored in the precipitation tank 11, from the precipitation tank 11 to the ultrasonic treatment tank 15 through the communication pipe 12, The liquid substance separated in the precipitation separation step is stored in the ultrasonic treatment tank 15, and the ultrasonic supply mechanism 16 is used to supply fine bubbles that are ultrasonically vibrated into the ultrasonic treatment tank 15.

  Here, the ultrasonic supply mechanism 16 connects the supply pipe 17 to the rotary blower 4, arranges the tip of the supply pipe 17 at the bottom of the ultrasonic treatment tank 15, and sets the ultrasonic generator at the tip of the supply pipe 17. 18 is connected.

  As shown in FIG. 1 (c), the ultrasonic generator 18 is arranged at the bottom of the ultrasonic treatment tank 15, and a collision plate 20 made of a plate-like catalyst (zinc) is formed between a pair of left and right side walls 19. Is attached to the impingement plate 20 so that it can freely move back and forth, and compressed air compressed by the rotary blower 4 is blown from the nozzle 21 at the tip of the supply pipe 17 toward the impingement plate 20, and the impingement plate 20 is ultrasonically generated by pulsation of the compressed air It is configured to vibrate, generate fine bubbles on the surface of the collision plate 20, and supply the ultrasonically vibrated fine bubbles into the liquid material stored in the ultrasonic treatment tank 15.

  In this ultrasonic treatment process, oxygen is supplied into the liquid material by the action of the fine bubbles vibrated ultrasonically using the ultrasonic supply mechanism 16, and the oil in the liquid material is decomposed to purify the liquid material. Like to do.

  The sewage treated through the sewage purification process, the precipitation separation process, the sewage reduction process, and the ultrasonic treatment process is transferred from the ultrasonic treatment tank 15 to the discharge tank 24, and then from the discharge pipe 22 of the discharge tank 24 to the outside. To be released.

  As described above, in the sewage treatment system, sewage is stored in the septic tank 1 that is installed outdoors and the upper part is opened, and the sewage is purified by supplying fine bubbles to the septic tank 1 to precipitate the sewage after purification. It is stored in the tank 11 and separated by precipitation, and the separated solid matter is reduced to the septic tank 1, while the separated liquid substance is stored in the ultrasonic treatment tank 15 and ultrasonically vibrated in the ultrasonic treatment tank 15. It is configured so as to purify the liquid by supplying fine bubbles.

  Therefore, in the sewage treatment system configured as described above, the sewage can be purified by effectively functioning without killing the bacteria inside the septic tank 1, and the oil content in the sewage is excellent due to the fine bubbles generated by ultrasonic vibration. Therefore, sewage can be purified well.

  In the sewage treatment system, the fine bubble generators 25 and 37 shown in FIG. 2 or 3 can be used as the fine bubble generator 7.

  A fine bubble generator 25 shown in FIG. 2 has a collision plate 28 attached in a slanting manner so that it can swing back and forth between left and right side walls 27, 27 of a rectangular box-shaped casing 26 opened up and down. A nozzle 10 at the tip of the branch pipe 6 is attached to the side wall 29 so as to face the collision plate 28.

  The impingement plate 28 has a substrate 31 attached to a rotating shaft 30 rotatably supported on the casing 26, and a pair of porous catalyst plates (zinc and stainless steel) 32, 33 are spaced on the front and back of the substrate 31 and a hole 34 is provided. , 35 are shifted in position. Further, the collision plate 28 is supported in an inclined manner by the support rod 36 from the back side at the lower end portion.

  Further, the microbubble generator 37 shown in FIG. 3 has a collision plate 39 mounted in a cylindrical casing 38 so as to freely move up and down, and collides the nozzle 10 at the tip of the branch pipe 6 with the front end wall 40 of the casing 38. It is mounted facing the plate 39.

  In the collision plate 39, a porous zinc catalyst plate 42 and a stainless steel catalyst plate 43 are attached to a rotary shaft 41 rotatably supported by a casing 38 so as to be inclined upward and downward.

  Further, the fine bubble generator 37 has a suction port 44 formed in the upper part of the casing 38, and sewage is sucked into the inside from the suction port 44. Note that a pump may be connected to the suction port 44 to forcibly suck sewage into the interior by the action of the pump.

  Further, the fine bubble generator 37 is attached to the rear end opening of the casing 38 with a spiral blade 45 at a circumferential interval so that the purified sewage is diffused and discharged as a swirling flow from the rear end opening. ing.

  The fine bubble generators 25 and 37 generate fine bubbles on the surfaces of the collision plates 28 and 39 by blowing the compressed air compressed by the rotary blower 4 from the nozzle 10 toward the collision plates 28 and 39, and the septic tank The fine bubbles are supplied into the sewage stored in 1 and the collision plates 28 and 39 are vibrated by the pulsation of the compressed air, and the fine bubbles are generated on the surfaces of the collision plates 28 and 39 and stored in the septic tank 1. Fine bubbles that are vibrated are supplied to the inside of the object.

  In the fine bubble generators 25 and 37, not only purification of sewage but also deodorization, sterilization, and hydrogenation of sewage can be performed.

DESCRIPTION OF SYMBOLS 1 Septic tank 2 Drain pipe 3 Fine bubble supply mechanism 4 Rotary blower 5 Supply pipe 6 Branch pipe 7 Fine bubble generator 8 Side wall 9 Collision plate 10 Nozzle
11 Sedimentation tank 12 Communication pipe
13 Pump 14 Transfer pipe
15 Ultrasonic treatment tank 16 Ultrasonic feed mechanism
17 Supply pipe 18 Ultrasonic generator
19 Side wall 20 Collision plate
21 Nozzle 22 Drain pipe
23 Settling tank 24 Discharge tank
25 Microbubble generator 26 Casing
27 Side wall 28 Collision plate
29 Side wall 30 Rotating shaft
31 Substrate 32,33 Catalyst plate
34,35 hole 36 support rod
37 Fine bubble generator 38 Casing
39 Collision plate 40 Front end wall
41 Rotating shaft 42, 43 Catalyst plate
44 Suction port 45 Spiral wing

Claims (3)

  In addition to storing sewage in a septic tank with an open top installed outdoors, the microbubble generator supplies fine bubbles to the septic tank to purify the sewage, and stores the purified sewage in a sedimentation tank for precipitation separation and separation. While reducing the solid matter to the septic tank, the separated liquid substance is stored in an ultrasonic treatment tank, and the ultrasonic substance is ultrasonically vibrated into the ultrasonic treatment tank by an ultrasonic generator to supply the liquid substance. A sewage treatment system characterized by purifying.   The fine bubble generator sprays compressed air toward an inclined collision plate that can swing back and forth, vibrates the collision plate by the pulsation of the compressed air, generates fine bubbles on the surface of the collision plate, and vibrates it. The sewage treatment system according to claim 1, wherein the sewage treatment system is configured to supply fine bubbles. In a fine bubble generator for generating fine bubbles,
Compressed air is blown toward an inclined collision plate that can swing back and forth, and the collision plate is vibrated by the pulsation of the compressed air, and fine bubbles are generated on the surface of the collision plate so that the vibrated fine bubbles are supplied. A fine bubble generator characterized by comprising.

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