KR19990008677A - Air supply device for wastewater treatment - Google Patents

Abstract

The present invention relates to an air supply device for a wastewater purification treatment device for treating wastewater and wastewater.

The air supply apparatus of the waste water purification treatment apparatus of the present invention is connected to the first T-shaped connector, one side is connected to the first L-shaped connector, and the other side is connected to the first T-shaped connector. The first cylindrical pipes, the second cylindrical pipes respectively connected to both ends of the T-shaped first connecting pipe, and the air supplied to the second cylindrical pipes so as to flow downward. A second L-shaped connecting tube connected to an end of the second cylindrical pipe of the second tube, a T-shaped second connecting tube connected to the second L-shaped connecting tube via a nipple, and the T-shaped connecting member 2nd to 4th cylindrical pipes respectively connected to both ends of the connection pipe, and first to fourth connected to both ends of the fourth cylindrical pipe to blow air into the aeration tank so that organic sludge does not accumulate on the bottom of the retaining wall of the aeration tank.A diffuser engine is provided.

The air supply device of the waste water purification treatment apparatus according to the present invention configured as described above supplies air to the waste water introduced into the aeration tank with only one air supply pipe, and supplies the dissolved oxygen in the aeration tank to the aeration tank by four air supply pipes. It can maintain more, maintain the angle and direction of diffuser in a certain direction, keep dissolved oxygen in the aeration tank above a certain level, and improve the angle and direction of diffuser and installation location of outlet By greatly increasing the aeration time than the conventional aeration tank of capacity, the purification treatment capacity can be significantly improved, and the installation cost can be greatly reduced.

Description

Air supply device for wastewater treatment

The present invention relates to an air supply device for a wastewater purification treatment system according to an activated sludge method for removing contaminants by metabolism of microorganisms that survive in organic nutrients contained in livestock and domestic wastewater.

In general, in order to purify sewage and wastewater, anaerobic fermentation alone cannot be expected to have a sufficient purification effect. Therefore, aerobic treatment must be performed.

In the aerobic treatment, the aerobic microorganisms that survive in the wastewater at the time of treatment are aerated in the aeration tank to maintain a high dissolved oxygen level (DO) of the wastewater.

When the inside of the aeration tank is formed in aerobic conditions as described above, microorganisms are active, and organic contaminants are used as food chains to completely decompose organic contaminants to promote purification.

In order to promote and increase the purification capacity of the wastewater through this series of processes, the dissolved oxygen (DO) in the aeration tank must be increased for the microorganisms to be active, so the piping facilities for supplying air or oxygen must be well-equipped.

The activated sludge method is widely used in various wastewater treatments because the purification ability can be greatly improved by maximizing the microbial reaction among biological treatment methods.

The activated sludge process is generally divided into three stages: pretreatment, main treatment, and sludge treatment. The composition of the purification device is largely divided into the introduction tank, the aeration tank, and the sedimentation tank. It is discharged to treated water.

In particular, in each stage of the purification apparatus, the part which plays an essential role of maximizing the reaction of aerobic microorganisms and promoting the wastewater purification treatment is an aeration tank, and the amount of dissolved oxygen required for the aerobic microorganism to grow in the aeration tank (DO Aeration is carried out continuously to increase).

At this time, the amount of dissolved oxygen (DO) in the aeration tank is different depending on the piping system for inducing the air generated by the blower installed in the outside into the aeration tank and the installation method of the diffuser which uniformly distributes the inflowed air. Noticeably different.

As a typical air supply device for a wastewater and wastewater purifier, there is shown in FIGS. 1A and 1B. In Figs. 1A and 1B, reference numeral 1 denotes an aeration tank for decomposing contaminants by aeration of introduced wastewater, and the aeration tank 1 retains the retaining wall 2 so as to temporarily store the incoming wastewater for purification. )

An inlet 3 is formed in the upper portion of the retaining wall 2 constituting the aeration tank 1, and an inlet 3 for introducing wastewater and wastewater is formed on the retaining wall 2 of the aeration tank 1. The retaining wall 2 is provided with a discharge port 4 for discharging the wastewater and wastewater purified by the aeration tank 1.

The outer side of the aeration tank (1) is provided with a blower (5) for generating air to aeration, the fresh air generated in the blower (5) is diffuser (7a-7c) through the cylindrical pipe (6a-6c) (7a'-7c 'in FIG. 1b), oxygen is supplied into the aeration tank 1 from the diffuser 7a-7c (7a'-7c') and the dissolved oxygen amount DO in the aeration tank 1 is reached. By increasing), aerobic microorganisms actively proliferate. The aerobic microorganisms combine with organic solids in the waste water to form activated sludge.

If the aeration continues in this activated sludge, the pollutant that becomes the nutrient substrate of the activated sludge microorganisms begins to decompose and gradually decreases. Repeated passage of such a series of purification processes in a plurality of aeration tanks (1) installed in the first aeration tank (1) of the high concentration of contaminant nutrient concentration is gradually reduced to the low concentration that the active onyx microorganisms can not reproduce. At this time, the activated sludge microorganism also enters the self oxidizer in the state of self-breathing and decreases, and the waste water is purified to a level that does not adversely affect the environment.

In the above description, between the cylindrical pipe 6a and the cylindrical pipe 6b, air introduced from the air valve 8 in accordance with the operation of the blower 5 receives the diffusers 7a-7c ( 7a '-7c') are connected by an L-shaped connecting pipe 9a, and an L-shaped connecting pipe 9b is formed between the cylindrical pipe 6b and the cylindrical pipe 6c. It connects to the diffuser 7c (7c in FIG. 1A) by the L-shaped connecting pipe 9c (9c 'in FIG. 1A) at the end of the said cylindrical pipe 6c. .

The cylindrical pipe 6c has T-shaped connecting pipes 10a and 10b for blowing air introduced through the cylindrical pipe 9b and the L-shaped pipes 9b and 9b '. Diffuser (7a, 7b) (7a ', 7b') is connected via (10a ', 10b')

In the above-mentioned purification process of wastewater and waste water, in the conventional single-shaped pipe shown in FIG. 1, high pressure air is supplied to the first diffuser 7a, 7a 'installed on the blower 5 side. Since low pressure air is supplied to final diffuser 7c (7c '), it is not possible to supply air evenly to the whole aeration tank 1.

Therefore, the organic soiled material around the diffuser 7a (7a´), which is close to the blower 5, has a high aeration capacity, so that the particles are broken up and rise to the surface of the aeration tank 1 by buoyancy. Active sludge, which is essential for the decomposition of (contaminated turbid material), is not formed, which prevents the growth of aerobic microorganisms.

On the other hand, soil material around the diffuser (7b, 7c) (7b ', 7c') far from the blower (5) is sufficient dissolved oxygen (DO) required for the growth of the active oni microorganisms even if activated sludge is formed Without the supply, organic fouling material is incompletely decomposed, and as time passes, the polluting material decays, impairing the viability of active sludge organisms, making the purification process difficult.

In addition, in the conventional wastewater and wastewater treatment apparatus, as shown in FIG. 1A, the installation direction of the diffuser 7a-7c is directed toward the bottom of the aeration tank 1, or as shown in FIG. 1B. ´) is installed so as to face the water, and the inlet 3 and the outlet 4 are also installed on the opposite side of the retaining wall 2 constituting the aeration tank 1 so as to be opposite to each other. Aeration time in the head is short.

Therefore, in order to completely purify the organic pollutants contained in the waste water, it is necessary to additionally install several sets of aeration tanks, and there is a problem in that facility costs and operating expenses are high because the operation is difficult.

In particular, the aeration tank 1 has a problem that it is difficult to completely purify nitrogen (N) and phosphorus (P), which causes water quality eutrophication which adversely affects the environment due to short residence time of wastewater.

Accordingly, the present invention has been made to solve the above problems, the object of the present invention is the amount of dissolved oxygen that increases the viability of the aerobic microorganisms to decompose the organic contaminants of the waste water introduced into the aeration tank and the viability by regeneration ( The present invention provides an air supply device for a wastewater and wastewater treatment processor that can uniformly supply DO) in aeration tank at a constant rate.

Another object of the present invention is to provide an air supply apparatus for a wastewater and wastewater treatment processor which can prevent the organic soiling material from being broken or decayed in the aeration tank.

It is still another object of the present invention to provide an air supply device for an aeration tank for a wastewater purification treatment apparatus that can significantly prolong the residence time of the organic pollutant in the aeration tank and promote the wastewater purification treatment even with a small capacity aeration tank. It is.

In order to achieve the above object, an air supply device for a wastewater purification treatment machine according to the present invention includes a T-shaped first connector, one side of which is connected to the L-shaped first connector, and the other side of the T-shaped connector. Air supplied to the first cylindrical pipe connected to the first connecting pipe of the second cylindrical pipe connected to both ends of the T-shaped first connecting pipe, and the second cylindrical pipe. A second L-shaped connecting pipe connected to an end of each of the second cylindrical pipes so as to flow in a downward direction, and a T-shaped second connecting pipe respectively connected to the second L-shaped connecting pipe via a nipple. And four fourth cylindrical pipes respectively connected to both ends of the T-shaped second connecting pipe, and the fourth cylindrical pipes are connected to both ends of the fourth cylindrical pipe so that air is not accumulated on the bottom of the retaining wall of the aeration tank. It is characterized by including the 1st-4th diffuser which blows in an aeration tank.

1 is a perspective view showing an air supply device of a conventional waste water purification treatment machine,

2 is a perspective view showing an air supply apparatus for a wastewater purification treatment system according to an embodiment of the present invention;

3 is a cross-sectional view taken along arrow A-A 'of FIG.

Explanation of symbols for the main parts of the drawings

100: aeration tank 102: retaining wall

104,107,110,111,123,124,133,134: Cylindrical piping

105: blower

106,115,116125,126,135,136: L shaped connector

108: air valve 109, 120, 121: T-shaped connecting pipe

128,129,1138,139

Hereinafter, a wastewater purification treatment apparatus according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a perspective view showing a wastewater purification treatment apparatus according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view taken along the arrow A-A 'of FIG.

As shown in FIG. 2 and FIG. 3, a blower 105 is provided outside the retaining wall 102 of the aeration tank 100 to continuously generate fresh air, and allows the generated air to flow into the aeration tank 100. For example, a cylindrical pipe 104 is connected to one side of the blower 105, and an air valve 108 for controlling the amount of air introduced into the aeration tank 100 between the blower 105 and the cylindrical pipe 104. ) Is installed.

In addition, the cylindrical pipe 107 is coupled by the L-shaped connecting pipe 1106 to bend the installation direction of the cylindrical pipe 104 at right angles into the aeration tank 100, the inside of the aeration tank 100 T-shaped connecting pipe 109 is coupled to the lower end portion of the cylindrical pipe 107 suspended vertically.

At both ends of the T-shaped connecting pipe 109, cylindrical pipes 110 and 111 of the same length are connected horizontally to a slightly higher space from the bottom of the retaining wall 102 constituting the aeration tank 100, respectively.

L-shaped connecting pipes 115 and 116 and nipples 117 and 118 are coupled to both ends of the cylindrical pipes 110 and 111 disposed in parallel with the bottom of the retaining wall 102 constituting the aeration tank 100. Horizontally connected cylindrical pipes 110 and 111 are converted to right angles.

In addition, the lower portion of the nipple 117 is coupled to the T-shaped connecting pipe 120, the two-way cylindrical pipe 123, 124 of the same length in both directions of the T-shaped connecting pipe 120 of the aeration tank 100 It is disposed to be horizontal to the bottom of the retaining wall 102, the L-shaped connecting pipes (125, 126) are coupled to each end of the cylindrical pipe (123, 124). At the ends of each of the L-shaped connecting pipes 125 and 126, the first and second diffusers 128 and 129 are 15 ° to 25 degrees from the cylindrical pipes 123 and 124 which are parallel to the bottom of the retaining wall 102 of the aeration tank 100. It is installed in the opposite direction toward the bottom of the retaining wall 102 of the aeration tank 100 inclined at an angle.

In addition, the lower portion of the nipple 118 is coupled to the T-shaped connecting pipe 121, the two-way cylindrical pipe 133, 134 of the same length in both directions of the T-shaped connecting pipe 121 of the aeration tank 100 It is disposed to be horizontal to the bottom of the retaining wall 102, the L-shaped connecting pipe (135, 136) is coupled to each end of the cylindrical pipe (133,134). At each end of each of the L-shaped connecting pipes 135 and 136, the third and fourth acid pipes 138 and 139 are 15 ° to 25 degrees from the cylindrical pipes 133 and 134 which are parallel to the bottom of the retaining wall 102 of the aeration tank 100. It is installed in the opposite direction toward the bottom of the retaining wall 102 of the aeration tank 100 inclined at an angle.

At the same time, an introduction port 103 is installed at one side of the retaining wall 102 of the aeration tank 100 so that the waste water flows into the aeration tank 100, and a discharge port is provided at the center of the retaining wall 102 opposite to the introduction port 103. 140 is formed.

Next, the action and effect on the air supply device of the waste water purification treatment apparatus of the present invention configured as described above will be described.

First, the living sewage and livestock sewage to be purged are introduced into the aeration tank 100 through an inlet 103 installed on one side of the retaining wall 102 of the aeration tank 100, and at the outside of the aeration tank 100. Blower 105 installed in the operation is operated to generate fresh air continuously.

The fresh air generated in this way is supplied to the cylindrical pipe 104 through the air valve 108 for adjusting the air volume, and the air supplied to the cylindrical pipe 104 is introduced into the cylindrical pipe 107. Inflow.

At this time, the air introduced into the cylindrical pipe 107 is the same ratio by the cylindrical pipe (110, 111) connected to the T-shaped connecting pipe 109 and the T-shaped connecting pipe 109, respectively. The air volume is divided in both directions and distributed and supplied to the cylindrical pipes 123, 124, 133 and 134 through the L-shaped pipes 115 and 116, the nipples 117 and 118 and the T-shaped connecting pipes 120 and 121, respectively. The first through fourth diffusers 128, 129, 138 and 139 are ejected into the aeration tank 100.

As such, the fresh air jetted into the aeration tank 100 through the first to fourth diffusers 128, 129, 138 and 139 is uniformly supplied with the dissolved oxygen DO in the aeration tank 100 through the first to fourth diffusers 128, 129, 138 and 139. As a result, the aerobic microorganisms are reproducibly ideally active to dramatically increase the purification treatment effect.

The first to fourth diffusers 128, 129, 138, and 139 have a lower inclination angle θ of 15 ° to 45 ° than the cylindrical pipes 123, 124, 133 and 134 which are parallel to the bottom of the retaining wall 102 of the aeration tank 100. At the same time, the first diffuser 128 and the second diffuser 129 are installed in opposite directions, and the third diffuser 138 and the fourth diffuser 139 are opposite to each other. The waste water in the aeration tank 100 is rotated along the white arrow by the air injection pressure ejected through the first to fourth diffusers 128, 129, 138 and 139, so that the amount of dissolved oxygen in the aeration tank 100 ( The distribution can be kept constant at all times.

In addition, organic sludge does not accumulate on the bottom of the retaining wall 102 of the aeration tank 100 due to the above-described rotational movement, and the outlet 140 is also installed in the middle of the retaining wall 105, so that the residence time of the waste water in the aeration tank 100 is maintained. It can significantly extend and prevent corruption and can greatly increase the purification treatment capacity.

As described above, according to the air supply device of the wastewater and wastewater treatment system of the present invention, even with one pipe line introduced into the aeration tank, four pipe lines having the same air volume and pressure can be formed, so that one supply pipe has four identical supply pipes. As it functions, it is possible to prevent the organic pollutants in the aeration tank to be cleaned or decayed due to the significant difference in the air injection pressure depending on the distance between the blower and the diffuser, and also to change the installation angle and direction of the diffuser. By forming the inlet and outlet positions opposite to each other, and installing the outlet below the inlet, organic sludge does not accumulate on the bottom of the aeration tank, and the wastewater and wastewater aeration and residence time in the aeration tank can be significantly extended. Therefore, even if the aeration tank capacity is drastically reduced, This can promote the purification process, thereby reducing the installation cost, significantly reducing the maintenance cost, and reducing the aeration time, which was not possible with the conventional waste water purification treatment apparatus. Nitrogen (N) and phosphorus (P) contained in the waste water can be effectively purified, which is very effective.

Claims (3)

In the air supply apparatus of the wastewater purification processor having a blower for generating air on one side of the aeration tank and an L-shaped connecting pipe to change the direction of excretion of the cylindrical pipe connected to the blower, A first T-shaped connecting tube 109, the first side is connected to the L-shaped first connecting tube 106, the other side is connected to the first T-shaped first connecting tube 109 Air supplied to the cylindrical pipe 107, the second cylindrical pipes 110 and 111 connected to both ends of the T-shaped first connecting pipe 109, and the second cylindrical pipes 110 and 111, respectively. Nipples 117 to the second L-shaped connecting pipes 115 and 116 connected to the ends of the respective second cylindrical pipes 110 and 111 and the second L-shaped connecting pipes 115 and 116 so as to flow downward. Second T-shaped connecting pipes 120 and 121 connected via 118, fourth cylindrical pipes 123, 124, 133 and 134 connected to both ends of the T-shaped second connecting pipes 120 and 121, respectively; 4 Organic sludge is accumulated at the bottom of the retaining wall 102 of the aeration tank 100 by being connected to both ends of the cylindrical pipes 123, 124, 133 and 134, respectively. The first to fourth aeration (128 129 138 139), and O and air supply to the waste water purification that includes a processor for ejecting prevent air into the aeration tank (100). According to claim 1, wherein the first to fourth diffuser (128,129,138,139) is 15 degrees to 45 degrees lower than the cylindrical pipes 123,124 (133,134) parallel to the bottom of the retaining wall 102 of the aeration tank 100 An air supply device for a wastewater treatment plant, characterized in that it is installed at an inclined angle. According to claim 1, wherein the first diffuser 128 and the second diffuser 129 is installed in the opposite direction to each other, the third diffuser 138 and the fourth diffuser 139 are opposite to each other Air supply device for a waste water purification treatment apparatus, characterized in that is provided in the direction of the direction.