KR101014870B1 - Advanced wastewater treatment apparatus - Google Patents

Abstract

PURPOSE: An advanced waste water treatment apparatus is provided to obtain high efficiency by combining with biological treatment. CONSTITUTION: An advanced waste water treatment apparatus(10) comprises: a first flow control tank(20) having an inlet(21); a batch sludge reaction tank(30) having air diffuser(32) which maintains the concentration of supply dissolved oxygen of air pressed by a fan(31); a second flow control tank(40) with a function of mixing unit and coagulation unit; a settling tank(60) having an overflow part(61); and a sterilizing tank(70) having an outlet(71).

Description

Advanced Wastewater Treatment Apparatus

 The present invention is to improve the efficiency of advanced biological treatment system in sewage treatment system, especially in sewage treatment system, and it is a biological and chemical combined sewage altitude that can efficiently remove nitrogen, phosphorus and heavy metals. It relates to a processing device.

In general, the management of water pollution is the best way to manage the source, but due to the factors of daily life or industrial activities, the life rhythm is formed to be discharged after the final purification treatment. Medium and large sewage treatment facilities are installed and in operation. Most sewage treatment facilities are biological treatments, and there are BOD (bio-oxygen demand) and SS (floating substances) of high-purity items of pollutant, while TN (total nitrogen) and TP (total phosphorus) ) Reaches the limit of not achieving very high efficiency. The removal rate of T-N and T-P is in the range of 60 ~ 70% on average, and when it tries to maintain the efficiency above, it encounters the limitation of biological characteristics.

However, current environmental concerns and environmental needs of natural ecosystems require higher rates of purification than current rates of cleansing, and the demands continue to be raised.

In order to meet the demands of the times like this, many public methods have been developed and implemented, but many trials and errors and unexpected problems have not produced much effect.

In order to solve this problem, various methods such as secondary biological treatment and filtration after primary biological treatment have been developed and used. However, the removal of contaminants formed or ionized by compounds has a small removal rate. Unexpectedly, rivers and ecosystems around large cities are exposed to many pollutant loads, reaching a level of danger just before the ecosystem is disturbed or destroyed.

Especially, in case of total phosphorus (TP) among pollutants, it is one of the urgent items to remove green phosphorus and red tide because it causes tremendous eutrophication when it enters natural ecosystem, and it is urgent to remove total phosphorus. The development of public methods is urgent.

The present invention has been made to solve the above problems, and its object is to provide a chemical treatment system that can obtain high efficiency by combining with biological treatment in the sewage treatment apparatus.

Another object is to provide a further increase in the removal efficiency of the total phosphorus by further incorporating the chemical treatment system having the high efficiency to the rear of the existing sewage treatment system.

The present invention for achieving the above object is dissolved in the amount of dissolved oxygen by supplying the air flow compressed by the first flow rate adjustment tank 20 and the blower 31 having the inlet port 21, the sewage introduced from the outside A second flow rate adjusting tank including a batch sludge reaction tank 30 having an acid device 32 for maintaining a concentration of oxygen, and an acid device 41 for dissolving compressed air supply bubbles to maintain the concentration of dissolved oxygen ( 40), a mixed agglomeration tank 50 having an upper mixing and a lower agglomeration function to increase efficiency with a mixed function of mixed agglomeration, a settling tank 60 having a overflow portion 61 at the top, and the final treated water can be discharged. In the sewage advanced treatment apparatus 10 having a sterilization discharge tank 70 having an outlet 71 formed so that

The first flow rate adjusting tank 20 at the tip of the sewage treatment system 10 is irregularly controlled by a stirrer 22 for stirring the sediment of organic matter introduced into the sewage and a water level controller 23 for sensing the level of the flow rate. The feed pump 24 for uniformly distributing the inflow flow rate is introduced into the next process and the batch sludge reaction tank 30, the agitator 33 for stirring the sludge reaction induction of the introduced sewage, and for oxygen supply A blower 31 to be installed, an air diffuser 32 for increasing the oxygen transfer rate, a primary treated water transfer pump 30a for transferring primary treated water, and a supernatant water control pipe 30b for suctioning the treated supernatant. It is composed of a batch sludge reaction tank 30 that can effectively remove nitrogen and phosphorus as well as organic matter, and a batch sludge reaction controller 34 for controlling the reactor, and the precipitated excess sludge outside the concentrated dehydration tank ( With 100) It consists of the excess sludge drawing pipe (35) for transmission.

In addition, the second flow rate adjusting tank 40 includes a transfer pump 43 for transferring the flow rate to the next step by controlling the water level controller 42 for detecting the level of the flow rate, and the inflow water above the mixing coagulation tank 50. It is divided into a mixing chamber 51 into which the coagulant is introduced and the coagulant chamber 52 at the bottom, an agitator 53 capable of stirring the inflow water and the coagulant at the center, and a drug supply unit 54 to supply the coagulant to the outside. Is disposed, the settling tank (60) has a multistage flocculation induction rectifier (62) having a flocculation induction function of flocculating water, and a sludge collecting part (63) for collecting agglomeration sludge at the center of the lower part and the center. Agglomeration sludge drawing pipe 64 for transferring the coagulated sludge collected to the concentrated dehydration tank 100, and the sterilization discharge tank 70 is achieved by installing a UV sterilizer 72 for sterilizing the final monthly water.

The present invention is a system that can effectively remove contaminants by each treatment characteristics by merging sewage altitude treatment with the first stage biological treatment and the second stage chemical treatment. It removes heavy metals such as TP, Fe, and Mn in a two-step chemical treatment. In addition, by removing more than 95% of the glass system by the one-step biological treatment, it has the effect of reducing the operating load of the two-step chemical reaction process, and also maintains a lot of maintenance costs. As a result, in the first stage, the removal rate of BOD and SS by the main treatment process is more than 95, and TN is more than 70%, and TP is more than 60%. It can be removed.

1 is a side cross-sectional view of the overall process of the present invention.
2 is a plan sectional view of the whole process of the present invention.
3 to 4 are side and plan views of the mixing flocculation tank of the present invention.
5 to 6 is a side view and a plan view of the sedimentation tank of the present invention.
7 to 8 is a side view of the lower flocculation induction wing of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

First, the present invention, as shown in Figures 1 to 2 of the accompanying drawings, the first flow rate adjustment tank 20 having an inlet 21 through which the sewage introduced from the outside flows, and the air compressed by the blower 31 A second flow rate adjustment tank including a batch sludge reaction tank 30 having an acidizer device 32 for maintaining a concentration of dissolved oxygen in a supply amount, and an acidizer device 41 for maintaining a concentration of dissolved oxygen in a bubbled air ( 40), a mixed agglomeration tank 50 which simultaneously performs the functions of the mixing part and the flocculating part, and a settling tank 60 having a overflow portion 61 thereon, and an outlet 71 formed to discharge the final treated water. In the high sewage treatment apparatus 10 having a sterilization discharge tank having a,

In the first flow rate adjustment tank 20 at the tip of the sewage treatment system 10, a stirrer 22 for agitating the sediment of suspended sewage flowing into the bottom and a water level controller 23 for sensing the level of the flow rate are used for control. Thereby, the transfer pump 24 for controlling the irregular inflow of effluent to the required amount of the temporary storage and the next process is installed, respectively, the pump transfer pipe 24a of the transfer pump 24 is connected to the next process.

Here, the water level controller 23 may automatically detect the water level between the upper and lower by a relay switch, it is also possible to use a water level sensor, such as a temperature sensor, LDR or the like.

The batch type sludge reaction tank 30 is provided with a stirrer 33 for agitating the sediment of suspended sewage introduced into the bottom, and a blower 31 and a primary unit for supplying air to an air disperser 32 for supplying dissolved oxygen. The primary treatment water transfer pump 30a for transferring the water to the next process and the supernatant water control pipe 30b connected to the pump are installed so that all processes are operated by the batch sludge reaction controller 34. Then, the lower portion is connected to the excess sludge drawing pipe 35 for transferring the precipitated excess sludge to the external concentrated dehydration tank (100).

At the bottom of the second flow adjusting tank 40, a feed pump 43 for transferring a controlled flow rate to the next process by an indication value while controlling whether the water level controller 42 detects operation of the flow rate based on a control value. Is installed, the pump transfer pipe 43a of the transfer pump 43 is connected to the next process.

In addition, all the machinery is controlled by the ash sludge reaction controller 34 and the blower 31 is connected to the diffuser device 41 to perform the dissolved oxygen retention function.

The upper part of the mixing agglomeration tank 50 is divided by the mixing chamber 51 in which the inflow water and the coagulant drops and the mixing agglomeration separator 52a installed at an inclined surface in the center of the mixing chamber 51 and the lower agglomeration chamber. An agitator 53 capable of stirring the flocculating chemicals and a chemical supply part 54 for supplying the flocculating chemicals are disposed outside.

In the mixing chamber 51, as shown in FIG. 3, an inflow water induction plate 51a through which inflow water falls is disposed at the left end, and a chemical induction plate 51b in which flocculated chemicals are degraded is disposed at the left rear end. Each of which is connected to the mixing chamber 51, a plurality of agglomeration water separation plate 51c is arranged in connection with the lower agglomeration chamber 52 on the right side, the agglomeration of the agglomeration water is discharged in the upper part of the agglomeration water separation plate 51c The water discharge pipe 55 is formed.

Here, the inflow water induction plate 51a, the chemical induction plate 51b, and the flocculation water separation plate 41c are vertically or horizontally mixed with each other, and the mixed agglomeration separation plate 52a is composed of an inclined surface.

In addition, in the stirrer 53, as shown in FIG. 4, the rapid stirring blade 53b, the slave stirring blade 53c, and the slow stirring blade 53d are sequentially laid on the rotating shaft 53a in different sizes and shapes. It is.

Here, the slow stirring blade 53d may be a paddle form.

In addition, the chemical supply unit 54 is provided with a chemical stirrer 54b for diluting the flocculant in the chemical tank 54a in which the chemical is stored, and is disposed between the chemical tank 54a and the mixing coagulation tank 50. In the chemical supply pipe 54c, a chemical supply pump 54d for pumping chemicals is disposed.

A multistage agglomeration induction rectifier 62 is disposed at the central upper end of the settling tank 60, and the sludge collection part 63 is disposed at the center of the multistage agglomeration induction rectifier 62 so as to collect the agglomeration sludge at the lower center. It is disposed, the flocculation sludge drawing pipe 64 for transferring the flocculation sludge collected in the lower center to the concentrated dewatering tank 100 is installed at the bottom.

The multi-stage flocculation induction rectifier 62 has an end portion of the flocculation water discharge pipe 55 of the mixing flocculation tank 50 such that the flocculation water aggregated by the chemical reaction rotates clockwise as shown in FIGS. 5 to 6. The induction guide ben (55a) is coupled to the outer lower end of the cylindrical multi-stage coagulation induction rectifier 62, the reverse "Y" type of the upper coagulation induction pipe (62a) is installed, the coagulation is caused by vortex Flocculation is induced by flocculation prevention and repair flow control function, and the lower flocculation guide vane 62b of the structure having a rotary wing shape is fixed to the rotation axis of the sludge collecting part 63 and rotated in a clockwise direction so that the flocculation water is prevented. The lower flocculation guide vane 62b having a function of inducing the sedimentation direction by sludge separation and induction of hydraulic flow of the settling tank 60 is formed.

Here, the multistage flocculation induction rectifier 62 is formed in a circular shape.

The lower part of the rotary shaft 63a of the sludge collecting part 63 is provided with a scraper 63b for collecting the coagulated sludge, and a driving motor 63c for decelerating the movement based on the same rotational force as the repair flow rate. It is.

The sludge overflow prevention device 65 for blocking the overflow of the sedimentation by-product is attached to the wall inner circumferential surface in the center of the settling tank 60 in an inclined form.

In addition, the overflow portion 61 blocks the skim by-product blocking bart 61a and the moving fine float, and an inclined surface hop bar 61b for increasing sedimentation is integrally formed, and the water surface is provided on the inner wall of the upper wall of the settling tank 60. The overflow channel 61c is formed at a position where the repair load is reduced while safely protecting against vortices and flow rates generated at the lower portion.

The sterilization discharge tank 70 is a UV sterilizer 72 is installed to sterilize the final monthly water.

Referring to the operation of the present invention can be configured as follows.

First, sewage introduced from the outside into the first flow rate adjustment tank 20 is introduced through the inlet 21. In this case, if a large flow rate and a small flow rate are introduced without restriction according to the characteristics of the inflow time of the flow rate, the sediment contained in the sewage is prevented from settling, and the stirrer 22 for the intermixing function is operated. As such, when the sewage is continuously introduced in the situation, the water level of the first flow adjustment tank 20 is increased, and the water level controller 23 detects this and processes the batch sludge reaction tank 30 by the inflow signal originated in the next process. The flow rate required in the process is transferred to the transfer pump 24.

In the batch sludge reaction tank 30, the sewage and microorganisms are reacted, and the function of removing organic matters by the microorganisms in order is supply, anaerobic, aerobic, and discharge. At this time, the transfer pump 24 is controlled by the batch sludge reaction controller 34 around the batch sludge reaction tank 30 to satisfy the operating conditions for completion of metabolism of microorganisms such as F / M ratio, SRT, HRT, MLSS, and the like. The stirrer 22, 23, blower 31, and transfer pump 43 are connected and controlled by the designated values, and the operation sequence is (supply → anaerobic process → aerobic process → sedimentation process → discharge). Periodically operated in series, they form a stepwise operation of biological treatment.

In addition, in the anaerobic process to increase the reactivity with the suspended sewage of the introduced sewage was allowed to agitate with a stirrer (33), the precipitated excess sludge to the excess sludge drawing pipe (35) to the concentrated dehydration tank (100) outside the passage Will be transferred.

The second flow adjusting tank 40 temporarily stores the primary effluent sewage treated in the first biological treatment step, which is the first flow adjusting tank 20 and the batch sludge reaction tank 30, and controls the flow rate for the post-treatment process. While adjusting the flow rate by the transfer by the transfer pump 43, by the diffuser device 41 connected to the blower 31 to maintain the concentration of dissolved oxygen supply air, buffer the flow rate to the transfer pump 43 Transfer to the next process.

The chemical reaction of the mixed agglomeration tank 50 is a reaction process for inducing the chemical reaction between the flocculating agent and the sewage, and classifying TP and heavy metals present in the sewage into the flocculant. The fire chamber 51 is located at the top.

After mixing, inducing sedimentation due to the increase of gravity and providing a cohesion chamber 52 at the lower portion thereof, the composition is composed of two stages while efficiently inducing aggregation of T-P and the like by chemical reaction. At this time, the inflow water induction plate 51a and the chemical induction plate 51b are separated and installed for increasing the reactivity of the aggregates, and the openings of the induction plates are located in the range of 1/3 of the side wall depth of the mixing chamber, In order to induce reactivity by arranging the inflow water induction plate 51a and the chemical induction plate 51b in order, the effect of the aggregation reaction is increased and the cohesion force is increased by entering the cohesion chamber 52 with the lower induction due to the gravity increase of the mixed aggregates. Cohesion is increased by slow stirring.

Then, the flocculation water check for checking the flocculation state and the floc strength before the precipitation process is performed by the flocculation water separating plate 51c connected to the lower flocculation chamber 52. In addition, the mixing chamber 51 and the lower agglomeration chamber 52 are divided by the mixing agglomeration separation plate 52a, and the inflow water induction plate 51a, the chemical induction plate 51b, and the agglomeration water separation plate 51c are The vertical or mixed flocculation separator 52a is inclined from the horizontal to the center, and the central portion has an opening so that most of the upper and lower mixing chambers 51 are arranged.

On the other hand, on the rotating shaft (53a) of the stirrer (53) for stirring chemicals and sewage, the rapid stirring blade (53b) at the top and the slave stirring blade (53c) at the center, and the slow stirring blade (53d) in the lower part The three-stage agitation can reduce power costs.

In addition, the chemical aggregating tank 50 is supplied to the chemical tank 54a installed outside the mixing agglomeration tank 50 by pumping the chemical supply pump 54d.

The settling tank 60 introduces the introduced flocculated water into the multistage flocculation induction rectifier 62 and attaches a gentle flow rate caused by the naturally occurring flow rate to the aromatic induction guide ben 55a, so that the flocculated water of the lower scraper 63b. It was made to rotate clockwise in the same direction.

In addition, the sludge separation in the flocculation water is installed at the lower end of the multistage flocculation induction rectifier 62 to induce sludge separation and flocculation direction of the flocculation sedimentation water. As the aggregate aggregates by the lower aggregation induction blade 62b of the rotary wing shape, gravity and direction are established, and the aggregate sludge moves freely to the lower portion. At this time, as the flocculated sludge and the treated water are separated, the sludge is collected into the center of the screpa 63b and transferred to the external concentrated dehydration tank 100 through the flocculated sludge drawing pipe 64.

In addition, the flocculated water separates the mixed sludge and fine residues while spreading the upper flocculation guide plate 62a and the lower flocculation guide vane 62b at the center to the outer periphery of the diesel sedimentation tank 60, and the treated water gradually has a flow rate. It is relaxed and guided toward the outer wall of the settling tank 60.

Then, the residual fine aggregate by-products in the treated water are blocked by the sludge overflow prevention device 65 disposed on the inner circumferential surface of the central wall of the sedimentation tank 60, and moved by the scum by-product blocking baffle 61a of the overflow portion 61. The inclined surface hop bar 61b for blocking fine flotation and increasing sedimentability blocks the floating fine flotation so that only the treated water is transferred to the next process through the overflow channel 61c formed on the inner circumferential surface of the upper wall of the settling tank 60.

The sterilization discharge tank 70 sterilizes the monthly water flowing into the whole process by the UV sterilizer 62

The final treated water was to be discharged to the outlet 71.

While the invention has been described and illustrated in connection with preferred embodiments for illustrating the principles of the invention, it is not intended to be limited to the configuration and operation as such is shown and described.

In addition, those skilled in the art will appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims.

Accordingly, all such suitable changes, modifications, and equivalents should be considered to be within the scope of the present invention.

10: advanced sewage treatment apparatus 20: first flow adjustment tank
21: inlet 22, 33, 53: agitator
23, 42: level controller 24, 43: transfer pump
30: batch sludge reactor 30a: primary treated water feed pump
30b: upper water control tube 31: blower
32: diffuser 34: ash sludge reaction controller
35: excess sludge drawing pipe 40: second flow adjustment tank
41: diffuser 43a: pump feed pipe
50: mixed flocculation tank 51: mixed room
51a: influent induction plate 51b: chemical induction plate
51c: coagulated water separator 52: coagulation chamber
52a: mixed flocculation separator 53a, 63a: rotating shaft
53b: Rapid stirring wing 53c: Dependent stirring wing
53d: Slow high vane 54: Chemical supply part
54a: chemical tank 54b: chemical stirrer
54c: chemical supply pipe 54d: chemical supply pump
55: coagulated water discharge pipe 55a: aromatic induction guide ben
60: sedimentation tank 61: overflow part
61a: Skambus by-product blocking whip 61b: inclined hop bar
61c: monthly flow channel 62: multistage agglomeration induction rectifier
62a: upper flocculation guide plate 62b: lower flocculation induction blade
63: sludge collecting part 63c: drive motor
63b: Screpa 64: coagulated sludge drawing pipe
65: sludge overflow prevention device 70: sterilization discharge tank
71: outlet 72: UV sterilizer
100: concentrated dewatering tank

Claims (9)

Rotary sludge reaction tank having a first flow rate adjustment tank 20 having an inlet 21 through which the sewage introduced from the outside flows, and an air disperser 32 that maintains the concentration of dissolved oxygen supplied by the blower 31. 30, a second flow rate adjusting tank 40 including an air dispersing device 41 for maintaining the concentration of dissolved oxygen supplying compressed air, a settling tank 60 having an upstream portion 61 at the top, and In the sewage altitude treatment apparatus 10 having a sterilization discharge tank 70 having an outlet 71 formed to discharge treated water,
In the first flow rate adjustment tank 20 at the tip of the sewage altitude treatment apparatus 10, the average water level is controlled by a stirrer 22 for agitating the sediment of the sewage flowed in, and a water level controller 23 for sensing the level of the flow rate. Transfer pump 24 for transferring the required flow rate of the next step when the abnormality;
The batch sludge reaction tank 30 has a stirrer 33 for agitating the sediment of the introduced sewage suspended matter, and
A ash sludge reaction controller 34 having a unit operation operation and an interlock operation operation function of the processing step; Excess sludge drawing pipe (35) for transferring the precipitated excess sludge to an external concentrated dehydration tank (100);
The second flow rate adjusting tank 40 includes a transfer pump 43 for transferring the flow rate to the next step by controlling the water level controller 42 for detecting the level of the flow rate;
The upper part of the mixing coagulation tank 50 is divided into the mixing coagulation separation plate 52a into the mixing chamber 51 and the lower coagulation chamber 52 in which the inflow water and the coagulant are dropped, and the inflow water and the coagulant chemical can be stirred in the center. A stirrer 53 and a drug supply unit 54 for supplying agglomerated drugs to the outside;
The settling tank (60) is a multistage flocculation induction rectifier (62) into which coagulated water is introduced, and a sludge collector (63) for collecting coagulated sludge in the lower center at the center thereof, and a concentrated dewatering tank for coagulated sludge collected at the center. A sludge drawing pipe 64 for transferring to 100;
The sterilization discharge tank 70 is a sewage treatment apparatus, characterized in that the UV sterilizer 72 is installed to sterilize the monthly water. The method according to claim 1,
In the mixing chamber 51, an inflow water induction plate 51a through which the inflow water falls is disposed at the front end from the rotational direction on the upper left side, and the chemical induction plate 51b in which the coagulated chemical is degraded is in the inflow water induction plate 51a on the left side. Agglomeration water discharge pipe 55 is disposed at the rear end of the flow rate rotation direction, and a plurality of agglomeration water separation plates 51c connected to the agglomeration chamber 52 are disposed on the right side, and the agglomeration water is discharged to an upper part of the agglomeration water separation plate 51c. Sewage advanced treatment apparatus, characterized in that formed. The method according to claim 2,
The inflow water induction plate 51a, the chemical induction plate 51b, and the flocculation water separation plate 51c are vertically installed at respective corners, and a central portion of the mixed agglomeration separation plate 52a formed with a horizontal inclined surface is horn. An advanced sewage treatment apparatus, characterized in that the opening is formed to move the cargo. The method according to claim 1,
Sewage 53 is characterized in that the stirrer 53 of the mixing agglomeration tank 50, the rapid stirring blade 53b, the slave stirring blade 53c, the slow stirring blade 53d around the rotating shaft 53a is sequentially built up Advanced processing unit. The method according to claim 1,
The chemical supply unit 54 and the chemical tank (54a) is stored the drug;
A chemical stirrer 54b for diluting the coagulant stored in the chemical tank 54a;
Chemical supply pipe (54c) disposed between the chemical tank (54a) and the mixing coagulation tank 50, the sewage altitude treatment apparatus, characterized in that the chemical pump 55d for pumping the chemicals into the mixing coagulation tank (50) . The method according to claim 1,
An upper agglomeration guide plate 62a is formed at a lower end of the multi-stage agglomeration induction rectifier 62, and a lower agglomeration guide vane 62b spaced apart from the upper agglomeration guide plate 62a is formed. . The method according to claim 1,
A drive motor 63c is installed on the sludge collection unit 63 of the settling tank 60, and a scraper 63b for stirring the coagulated sludge is installed at the lower end of the rotation shaft 63a of the drive motor 63c. Sewage treatment system. The method according to claim 1,
Sludge overflow prevention device 65 is attached to the inner circumferential surface of the center of the sedimentation tank 60, characterized in that attached to the inclined form. The method according to claim 1,
The overflow portion 61 is a Sewage by-product blocking bart (61a) and the inclined surface hop bar (61b) for blocking the floating bubbles, characterized in that the integrated sewage treatment apparatus.

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