KR20220040717A - The separation discharge device of low-density sludge, the system including it, and the operation method thereof - Google Patents

Abstract

The present invention relates to water treatment, and more particularly, to a device for separating and discharging low specific gravity sludge from a mixed liquid in a bioreactor, a system including the same, and an operation method thereof. To this end, a device for separating and discharging low specific gravity sludge includes: a sludge separation tank (100) in which a bioreactor mixture (210) is accommodated; a plurality of inclined plates (180) which defines an inclined surface (157) at a predetermined height from a bottom of the sludge separation tank (100), and is installed on the inclined surface (157) to separate the low specific gravity sludge (220) and high specific gravity sludge (230) vertically; a rotating unit which rotates the inclined plates (180); and a low specific gravity sludge pipe (160) which is installed on one side of the inclined plates (180) to discharge the low specific gravity sludge (220).

Description

The separation discharge device of low-density sludge, the system including it, and the operation method thereof

The present invention relates to water treatment, and more particularly, to a device for separating and discharging low specific gravity sludge from a mixed solution of a bioreactor, a system including the same, and an operating method thereof.

In general, in sewage and wastewater treatment processes, suspended solids (SS) are removed to facilitate subsequent biological treatment, or microbial flocs after biological treatment are finally precipitated and removed. In addition, the precipitation process may be employed to remove phosphorus in wastewater, which is a eutrophication causative material, by a coagulation sedimentation method or to perform advanced treatment for reuse of sewage.

The main design elements of a gravity sedimentation basin are the sedimentation speed of the flocs to be removed and the sedimentation distance in the sedimentation basin, that is, the water depth and residence time. The concept of surface loading or overflow rate considering the sedimentation speed and sedimentation distance is applied. Sedimentation basins are largely divided into cross-flow sedimentation basins and high-speed coagulation sedimentation basins, and cross-flow sedimentation basins are classified into single-layered, multi-layered, and inclined plate sedimentation basins.

In addition, a batch biological water treatment method that can be classified into an intermittent inflow continuous batch reactor represented by SBR (Sequencing Batch Reactor) and a continuous inflow batch reactor represented by ICEAS (Intermittent Cycle Extended Aeration System) is disclosed.

The biological treatment process using microorganisms includes an anaerobic method, an aerobic method, and an anaerobic method. In particular, the biological methods mainly used in the secondary treatment of sewage include the standard activated sludge method in an aerobic state and the biofilm method. In most sewage treatment plants, the standard activated sludge method for suspended microorganisms is used, and in foreign countries, the trickling filter bed method, which is one of the biofilm methods that applies adherent microorganisms, is mainly used. In the advanced treatment process to remove nitrogen and phosphorus, biological methods of anaerobic, anaerobic, and aerobic conditions are used individually or in combination. In particular, the aerobic method removes nitrogen and phosphorus components in water by determining the air supply time to achieve aerobic conditions and air blocking time to achieve anoxic conditions. The SBR process has the characteristic of being able to control the process more efficiently by using time such as air supply time, blocking time, and settling time as major factors. In particular, biochemical characteristics appearing in nitrification and denitrification reactions are detected using sensors such as pH, DO, and ORP, and based on this, automatic control according to the state of the reactor is sufficiently possible.

However, in the SBR process, since each unit process has to be performed over time in a single reactor, it is difficult to continuously treat the influent because new influent cannot be introduced until the influent is completely discharged. In addition, since it is a process using microorganisms fundamentally, it is difficult to always secure stable treated water because sedimentation properties change according to changes in the operating environment such as changes in the state and temperature of microorganisms and changes in the load of pollutants.

In particular, when sludge was drawn through a sludge drawing device in the SBR process, high concentration (high specific gravity) sludge was preferentially drawn out for the purpose of reducing the capacity in the subsequent sludge treatment process. For this reason, low specific gravity and low activity sludge is retained in the bioreactor, the activity in the bioreactor is lowered, and wash out of the low specific gravity sludge occurs, thereby deteriorating the quality of the discharged water.

1. Republic of Korea Patent Registration No. 10-1032318 (Sloping plate sedimentation pond for wastewater treatment and upper part with efficient sludge discharge), 2. Korean Patent Registration No. 10-1247585 (automatic sludge discharge device for inclined plate-type sedimentation device).

Therefore, the present invention has been devised to solve the above problems, and the problem to be solved by the present invention is to separate a low specific gravity slurry that lowers microbial activity in a bioreactor (or SBR process) and discharge it separately. To provide a separation and discharge device for specific gravity sludge, a system including the same, and an operating method thereof.

Another object of the present invention is to select and draw only low specific gravity sludge, not high specific gravity sludge, so that sludge with high specific gravity and activity mainly resides in the bioreactor, thereby increasing the pollutant treatment efficiency. , to provide a system including the same and an operating method thereof.

However, the technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned are clearly to those of ordinary skill in the art to which the present invention belongs from the description below. can be understood

In order to achieve the above technical problem, the sludge separation tank 100 in which the bioreactor mixed solution 210 is accommodated; A plurality of inclined plates 180 are defined at a predetermined height from the bottom of the sludge separation tank 100 and installed on the inclined surface 157 to separate the low specific gravity sludge 220 and the high specific gravity sludge 230 up and down. ); Rotating means for rotating the swash plate 180; and a low specific gravity sludge pipe 160 installed on one side of the inclined plate 180 to discharge the low specific gravity sludge 220; is provided a device for separating and discharging low specific gravity sludge, characterized in that it includes.

In addition, the low specific gravity sludge 220 is 1.07 ~ 1.085 g/cm ³ Or, the high specific gravity sludge 230 is 1.09 ~ 1.1 g/cm ³ .

In addition, an optical sensor 150 for detecting the interface 155 between the supernatant 200 and the low specific gravity sludge 220 may be further provided on the upper portion of the swash plate 180 .

In addition, the low specific gravity sludge pipe 160, the pump 165 for drawing out the low specific gravity sludge 220; Or a first valve 170 for opening and closing the low specific gravity sludge pipe 160; may further include.

In addition, the inclined surface 157 may be composed of a swash plate region 182 in which a plurality of swash plates 180 are installed and a microorganism region 185 in which the swash plate 180 is not installed.

The inclined surface 157 has an inclination angle θ of 10 to 30°.

In addition, each swash plate 180 is in the form of a panel that can be installed adjacently, and may further include a rotation shaft 190 connected to the rotation means.

In addition, the rotating means is a motor connected to the rotating shaft (190).

In addition, a high specific gravity sludge pipe 130 for discharging the high specific gravity sludge 230 may be further provided at the lower portion of the sludge separation tank 100 .

In addition, a supernatant pipe 110 for discharging the supernatant 200 separated from the bioreactor mixture 210 may be further provided at the upper portion of the sludge separation tank 100 .

In addition, it may further include a plurality of swash plates 180 and a lifting means for elevating the rotating means, the lifting means is installed on the inclined surface 157, the lifting frame 300 including a plurality of swash plates (180) ; Lifting cable 320 connected to the lifting frame 300; It may include a; elevating roller 310 for guiding the elevating frame 300 with respect to the sludge separation tank 100 .

In addition, it further includes a drawing pump 330 installed on the lifting frame 300 , and the low specific gravity sludge pipe 160 is connected to the drawing pump 330 .

The object of the present invention as described above, as another embodiment, the separation and discharge device of the low specific gravity sludge described above; a bioreactor 20 for introducing the bioreactor mixture into the sludge separation tank 100 of the separation and discharge device; a sludge storage tank 50 connected to the bioreactor 20 and into which the low specific gravity sludge 220 separated from the sludge separation tank 100 is put; and a supernatant pipe 110 connected between the upper part of the sludge separation tank 100 and the bioreactor 20 and returning the supernatant 200 separated from the bioreactor mixed solution 210; It can also be achieved by a system comprising a device for separating and discharging specific gravity sludge.

In addition, it is connected between the lower part of the sludge separation tank 100 and the bioreactor 20, and returns the high specific gravity sludge 230 separated from the bioreactor mixed solution 210. A high specific gravity sludge pipe 130; further includes do.

In addition, the inclined surface 157 of the sludge separation tank 100 is an inclined plate area 182 in which a plurality of inclined plates 180 are installed.

The object of the present invention as described above, the above-mentioned low specific gravity sludge separation and discharge device; a bioreactor 20 accommodating the separation and discharge device therein; and a sludge storage tank 50 connected to the bioreactor 20 and into which the low specific gravity sludge 220 separated from the sludge separation tank 100 is input; It can also be achieved by a system that

In addition, the inclined surface 157 of the sludge separation tank 100 includes a swash plate region 182 in which a plurality of swash plates 180 are installed and a microorganism region 185 in which the swash plate 180 is not installed.

As another object of the present invention as described above, the step of injecting the bioreactor mixture 210 of the bioreactor 20 into the sludge separation tank 100 as another category (S100); opening the inclined plate 180 in the sludge separation tank 100 and precipitating the bioreactor mixture 210 for a predetermined time (S110); Determining whether the optical sensor installed in the sludge separation tank 100 has received an optical signal (S120); If the optical signal is received, returning the supernatant 200 separated from the bioreactor mixture 210 to the bioreactor 20 (S130); Closing the swash plate 180 (S140); Discharging the low specific gravity sludge 220 on the swash plate 180 to the low specific gravity sludge pipe 160 along the swash plate 180 (S150); Returning the high specific gravity sludge 230 under the swash plate 180 to the bioreactor 20 (S160); also achieved by the operating method of a system including a device for separating and discharging low specific gravity sludge, characterized in that it includes can be

According to the present invention, it is possible to separate and separately discharge the low specific gravity slurry that reduces the microbial activity in the bioreactor (or SBR process). Accordingly, sludge having high specific gravity and activity is mainly retained in the bioreactor, so that the efficiency of contaminant treatment can be increased, and washing out of the low specific gravity sludge can be prevented.

However, the effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description. will be able

The following drawings attached to this specification illustrate preferred embodiments of the present invention, and serve to further understand the technical spirit of the present invention together with the detailed description of the present invention to be described later, so that the present invention is described in such drawings It should not be construed as being limited only to
1 is a schematic configuration diagram of a system including a device for separating and discharging low specific gravity sludge, according to a first embodiment of the present invention;
Figure 2 is a perspective view of the sludge separation tank 100 in Figure 1,
3 is a cross-sectional view showing a state in which the bioreactor mixture 210 is put into the sludge separation tank 100 shown in FIG. 2;
4 is a cross-sectional view showing a state after the sludge separation tank 100 shown in FIG. 2 is settling;
5 is a side cross-sectional view of the sludge separation tank 100 shown in FIG.
6 is a flowchart illustrating an operating method of a system including a device for separating and discharging low specific gravity sludge, according to a first embodiment of the present invention;
7 is a schematic configuration diagram of a system including a device for separating and discharging low specific gravity sludge, according to a second embodiment of the present invention;
8 is a perspective view of the sludge separation tank 100 serving as the bioreactor 20 in FIG. 7 ;
9 is a schematic configuration diagram of a system including a device for separating and discharging low specific gravity sludge, according to a third embodiment of the present invention;
10 is a plan view of the lifting means in FIG. 9 .

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily carry out the present invention. However, since the description of the present invention is merely an embodiment for structural or functional description, the scope of the present invention should not be construed as being limited by the embodiment described in the text. That is, since the embodiment may have various changes and may have various forms, it should be understood that the scope of the present invention includes equivalents capable of realizing the technical idea. In addition, since the object or effect presented in the present invention does not mean that a specific embodiment should include all of them or only such effects, it should not be understood that the scope of the present invention is limited thereby.

The meaning of the terms described in the present invention should be understood as follows.

Terms such as “first” and “second” are for distinguishing one component from another, and the scope of rights should not be limited by these terms. For example, a first component may be termed a second component, and similarly, a second component may also be termed a first component. When a component is referred to as “connected” to another component, it may be directly connected to the other component, but it should be understood that other components may exist in between. On the other hand, when it is mentioned that a certain element is "directly connected" to another element, it should be understood that the other element does not exist in the middle. Meanwhile, other expressions describing the relationship between elements, that is, "between" and "between" or "neighboring to" and "directly adjacent to", etc., should be interpreted similarly.

The singular expression is to be understood to include the plural expression unless the context clearly dictates otherwise, and terms such as "comprise" or "have" are not intended to refer to the specified feature, number, step, action, component, part or any of them. It is intended to indicate that a combination exists, and it should be understood that it does not preclude the possibility of the existence or addition of one or more other features or numbers, steps, operations, components, parts, or combinations thereof.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless otherwise defined. Terms defined in the dictionary should be interpreted as being consistent with the meaning of the context of the related art, and cannot be interpreted as having an ideal or excessively formal meaning unless explicitly defined in the present invention.

of the first embodiment composition

Hereinafter, the configuration of the first embodiment will be described in detail with reference to the accompanying drawings. 1 is a schematic configuration diagram of a system including a device for separating and discharging low specific gravity sludge according to a first embodiment of the present invention. As shown in FIG. 1 , the bioreactor mixture 210 to be treated according to the present invention includes wastewater, livestock wastewater, industrial wastewater, sewage, sewage, and the like. And, in the present invention, the low specific gravity sludge 220 is in the range of 1.07 ~ 1.085 g/cm ³ , and the high specific gravity sludge 230 is 1.09 ~ 1.1 g/cm ³ .

The settling tank 10 is connected to the bioreactor 20 and the water treatment tank 30 in a line, the bioreactor 20 is connected to the sludge separation tank 100 and the sludge storage tank 50, and the sludge storage tank 50 is It is connected to the dehydrator (60).

The settling tank 10 precipitates or pre-treats the first influent for a certain period of time.

In the bioreactor 20, a sequencing batch reactor (SBR) process is performed using microorganisms. It is introduced into the sludge separation tank 100 through the bioreactor mixture 210 in the bioreactor 20 . The sludge separation tank 100 is respectively connected to the bioreactor 20 through the supernatant liquid pipe 110 and the high specific gravity sludge pipe 130 . The sludge separation tank 100 is connected to the sludge storage tank 50 through the low specific gravity sludge pipe 160 .

FIG. 2 is a perspective view of the sludge separation tank 100 of FIG. 1 . 2, the sludge separation tank 100 may have a rectangular parallelepiped or cylindrical shape.

A plurality of inclined plates 180 and an optical sensor 150 are provided inside the sludge separation tank 100, a supernatant liquid pipe 110 and a second valve 120 are provided at the upper outer side, and the high specific gravity sludge is provided at the lower outer side. A tube 130 and a third valve 140 are provided. The supernatant pipe 110 and the high specific gravity sludge pipe 130 may optionally be provided with respective pumps.

The inclined surface 157 is defined to have a descending inclination in one direction in the sludge separation tank 100 . The inclination angle θ of the inclined surface 157 is preferably 10 to 30° with respect to the horizontal. The inclination angle (θ) can be set differently depending on the type of the bioreactor mixture (sewage, livestock wastewater, sewage, etc.), and in this embodiment, it was set to 20°. If the inclination angle θ is too small, the low-density sludge may not be drawn out smoothly, and an undrawn residual amount may remain. And, if the inclination angle θ is too large, the supernatant 200 in addition to the low-density sludge may be withdrawn.

The low specific gravity sludge pipe 160 is installed in the lowest height region of the inclined surface 157 , and includes a first valve 170 and a pump 165 .

The swash plate 180 has a rectangular panel shape, and a plurality of swash plates 180 are adjacently installed to cover the entire inclined surface 157 along the inclined surface 157 . Each swash plate 180 is provided with a rotating shaft 190 , and one or both ends of the rotating shaft 190 are connected to an external motor (not shown) through the sludge separation tank 100 . The motor can be a motor capable of forward and reverse rotation, a servo motor, a stepping motor, an underwater motor, and the like. The swash plate 180 may be made of metallic stainless steel having an anti-corrosion function, or a non-metal material (FRP, PE, PP, reinforced polyamide resin, polyurethane, etc.). The swash plate may optionally be replaced with a trough, a pipe, or the like. Power is transmitted between the motor and the swash plate 180 by means of a gear, a chain, a belt, a wire, or the like.

The optical sensor 150 is installed on the wall surface of the sludge separation tank 100 from the upper part of the inclined surface 157 , and irradiates light toward the inside of the sludge separation tank 100 . That is, the optical sensor 150 is for detecting the interface 155 between the supernatant 200 and the low specific gravity sludge 220 . The photosensor 150 may use laser, infrared, visible, ultraviolet, etc., and operates based on whether it receives reflected or passed light. That is, if the bioreactor mixture in the sludge separation tank 100 is turbid, it is determined that there is no light received, so it is still precipitating, and when there is light received, it is determined that the clear supernatant 200 is layered and the precipitation is complete do.

In addition, the inclined surface 157 has a ratio of the height H1 of the high specific gravity sludge 230 to the height H2 of the low specific gravity sludge 220 from the bottom surface is 3: 2 to 2: 3 is defined within the range. For example, when the ratio of the height (H1) of the high specific gravity sludge 230 from the bottom to the height (H2) of the low specific gravity sludge 220 is 3: 2, the height of the entire sludge layer (H1 + H2 = 100cm) For the inclined surface, the inclined surface 157 is defined from a height of 60 cm.

In addition, based on the total height (H) of the bioreactor mixture 210, the slope 157 is defined at a height in the range of 40 to 50% with respect to the total height (H) to the bioreactor mixture 210. can

Operation of the first embodiment

Hereinafter, the operation of the first embodiment will be described in detail with reference to the accompanying drawings. First, FIG. 6 is a flowchart illustrating an operating method of a system including a device for separating and discharging low specific gravity sludge according to a first embodiment of the present invention.

First, the influent is first precipitated in the sedimentation tank 10, and then the bioreactor mixture 210 of the bioreactor 20 is introduced into the sludge separation tank 100 through the input pipe 22 (S100).

Next, the inclined plate 180 in the sludge separation tank 100 is opened, and the bioreactor mixture 210 is precipitated for a predetermined time (S110). 3 is a cross-sectional view showing a state in which the bioreactor mixture 210 is put into the sludge separation tank 100 shown in FIG. 2 . As shown in FIG. 3 , “opening of the swash plate 180” refers to a state in which each swash plate 180 is rotated in a vertical direction to communicate vertically. In this state, precipitation takes place for several hours to several tens of hours.

Next, it is determined whether the optical sensor 150 installed in the sludge separation tank 100 has received the optical signal (S120). If the optical signal is not received, since the interface 155 is not sufficiently formed yet, the precipitation state is further maintained.

4 is a cross-sectional view showing a state after the sludge separation tank 100 shown in FIG. 2 is settling. As shown in FIG. 4 , if it is in a state after precipitation, the photosensor 150 receives light. Then, the second valve 120 is opened to return the supernatant 200 to the bioreactor 20 . Thereby, sludge-free treated water is sent to the water treatment tank 30 .

Then, the swash plate 180 is closed by operating the motor (S140). The closing step of the swash plate 180 may be performed simultaneously with the supernatant returning step (S130), or may precede it.

Next, by opening the first valve 170 and operating the pump 165 , the low specific gravity sludge 220 accumulated on the swash plate 180 is moved along the swash plate 180 to the low specific gravity sludge pipe 160 . discharged (S150). The low specific gravity sludge 220 is collected into the sludge storage tank 50 through the low specific gravity sludge pipe 160 .

The high specific gravity sludge 230 under the swash plate 180 is optionally returned to the bioreactor 20 irregularly if necessary (S160). The returned high specific gravity sludge 230 serves to increase the microbial activity of the bioreactor 20 and increase the sedimentation property of the sludge. Accordingly, high-efficiency biological treatment is possible through high-concentration MLSS, leading to selective retention of highly active microorganisms.

5 is a side cross-sectional view of the sludge separation tank 100 shown in FIG. 2, and [Table 1] shows the contamination values of each zone by height shown in FIG.

MLSS (mg/L) MLVSS (mg/L) ρ (density)
(g/cm ³ ) SOUR
(mg-O ₂ /mg-VSS/hr) ZONE 1 5,190 4,250 1.070 15.8 ZONE 2 5,820 4,740 1.073 15.2 Zone 3 6,260 5,120 1.076 16.3 ZONE 4 6,640 5,480 1.095 16.5 Zone 5 7,800 6,320 1.095 16.4

As shown in Figure 5 and [Table 1], the low specific gravity sludge 220 of the present invention is the sludge corresponding to ZONE 1 and ZONE 2. And, the high specific gravity sludge 230 of the present invention is the sludge corresponding to ZONE 3 ~ ZONE 5. Accordingly, the inclined surface 157 is positioned between ZONE 2 and ZONE 3 .

2nd Example

7 is a schematic configuration diagram of a system including a device for separating and discharging low specific gravity sludge according to a second embodiment of the present invention, and FIG. 8 is a sludge separation tank 100 that also serves as the bioreactor 20 in FIG. ) is a perspective view. In the second embodiment, unlike the first embodiment, the sludge separation tank 100 is included in the bioreactor 20, or the bioreactor 20 and the sludge separation tank 100 are integrally formed.

7 and 8 , the sludge separation tank 100 is positioned between the settling tank 10 and the repair tank 30 .

In addition, the inclined surface 157 of the sludge separation tank 100 is divided into a swash plate region 182 in which a plurality of swash plates 180 are installed and a microorganism region 185 in which the swash plate 180 is not installed. The area of the swash plate area 182 and the area of the microbial area 185 on the inclined surface 157 may be in a ratio of 7:3 to 6:4. If the microbial region 185 is too small, the vertical activity of the microorganisms is lowered, the decomposition action of the bioreactor 20 is lowered, and the microorganisms are easily drawn along the inclined plate 180 . And, if the microbial region 185 is too large, it is easy to draw out the high specific gravity sludge together with the low specific gravity sludge.

The operation of this second embodiment is similar to the operation of the first embodiment described above. However, since it is the sludge separation tank 100 in the bioreactor 20, the return of the supernatant 200 or the return of the high specific gravity sludge 230 is omitted.

third embodiment

9 is a schematic configuration diagram of a system including a device for separating and discharging low specific gravity sludge according to a third embodiment of the present invention, and FIG. 10 is a plan view of the lifting means in FIG. 9 and 10, the sludge separation tank 100 is provided with a lifting means capable of lifting the swash plate 180 up and down.

The lifting frame 300 is a rectangular frame installed on the inclined surface 157 , and a lifting roller 310 is provided in each corner area. The elevating roller 310 performs a rolling motion on the inner surface of the slurry separation tank 100 and guides the elevating frame 300 to be stably elevated.

A plurality of swash plates 180 are arranged in a line inside the elevating frame 300 , and are rotatable about the rotation shaft 190 . The driving of the swash plate 180 and the rotating shaft 190 may transmit power using a separate motor (eg, an underwater motor).

One end of the lifting cable 320 is fixed to the elevating frame 300 , the other end extends to the outside of the slurry separation tank 100 , and a roller or a pulley is installed in the middle region. A lifting motor (not shown) is installed at the end of the lifting cable 320 to wind up or unwind the lifting cable 320 . The four lifting cables 320 are installed in each corner area of the lifting frame 3000. Therefore, the height of the swash plate 180 can be adjusted by lifting the lifting cables 320 to the height H1 of the high specific gravity sludge. This is because the height of the high specific gravity sludge (H1) may vary depending on the type, concentration, state, etc. of the bioreactor mixture solution 210 .

The drawing pump 330 may be installed on the elevating frame 300 to elevate the same. The drawing pump 330 is used when drawing out the low specific gravity sludge 220 . One end of the low specific gravity sludge pipe 160 is connected to the drawing pump 330, and the other end is extended to the outside. At this time, the low specific gravity sludge pipe 160 may be manufactured as a flexible tube. Other configurations of the third embodiment are the same as those of the first and second embodiments.

The detailed description of the preferred embodiments of the present invention disclosed as described above is provided to enable any person skilled in the art to make and practice the present invention. Although the above has been described with reference to preferred embodiments of the present invention, it will be understood by those skilled in the art that various modifications and changes can be made to the present invention without departing from the scope of the present invention. For example, those skilled in the art can use each configuration described in the above-described embodiments in a way in combination with each other. Accordingly, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The present invention may be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention. Accordingly, the above detailed description should not be construed as restrictive in all respects but as exemplary. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included in the scope of the present invention. The present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. In addition, claims that are not explicitly cited in the claims can be combined to form an embodiment or included as a new claim by amendment after filing.

10: sedimentation tank, 20: bioreactor,
22: input pipe, 30: water treatment tank,
40: discharge, 50: sludge storage tank,
60: dehydrator, 100: sludge separation tank,
110: supernatant tube, 120: second valve,
130: high specific gravity sludge pipe, 140: third valve,
150: optical sensor, 155: interface,
157: slope, 160: low specific gravity sludge pipe,
165: pump, 170: first valve;
180: inclined plate, 182: inclined plate area,
185: microbial area, 190: rotation shaft,
200: supernatant, 210: bioreactor mixture,
220: low specific gravity sludge, 230: high specific gravity sludge,
300: elevating frame, 310: elevating roller,
320: lifting cable, 330: drawing pump,
H: total height, H1: height of high specific gravity sludge,
H2: height of low specific gravity sludge, H3: height of supernatant,
θ: angle of inclination.

Claims (19)

a sludge separation tank 100 in which the bioreactor mixed solution 210 is accommodated;
A plurality of inclined plates are defined at a predetermined height from the bottom of the sludge separation tank 100 and installed on the inclined surface 157 to separate the low specific gravity sludge 220 and the high specific gravity sludge 230 up and down. (180);
a rotating means for rotating the swash plate 180; and
and a low specific gravity sludge pipe (160) installed on one side of the inclined plate (180) to discharge the low specific gravity sludge (220). The method of claim 1,
The low specific gravity sludge 220 is 1.07 ~ 1.085 g / cm ³ Or,
The high specific gravity sludge 230 is a device for separating and discharging low specific gravity sludge, characterized in that 1.09 ~ 1.1 g / cm ³ . The method of claim 1,
Separation and discharge device for low specific gravity sludge, characterized in that the optical sensor 150 for detecting the interface 155 between the supernatant 200 and the low specific gravity sludge 220 is further provided on the upper portion of the swash plate 180 . The method of claim 1,
The low specific gravity sludge pipe 160,
a pump 165 for drawing out the low specific gravity sludge 220; or
A device for separating and discharging low specific gravity sludge further comprising; a first valve 170 for opening and closing the low specific gravity sludge pipe 160. The method of claim 1,
The inclined surface 157 includes a swash plate area 182 where the plurality of swash plates 180 are installed and a microbial area 185 where the swash plate 180 is not installed. Device. The method of claim 1,
The inclined surface 157 is a device for separating and discharging low specific gravity sludge, characterized in that it has an inclination angle (θ) of 10 to 30°. The method of claim 1,
Each of the swash plates 180 is in the form of a panel that can be installed adjacently,
Separation and discharging device for low specific gravity sludge further comprising; a rotating shaft 190 connected to the rotating means. 8. The method of claim 7,
The rotating means is a device for separating and discharging low specific gravity sludge, characterized in that the motor is connected to the rotating shaft (190). The method of claim 1,
A device for separating and discharging low specific gravity sludge, characterized in that a high specific gravity sludge pipe (130) for discharging the high specific gravity sludge (230) is further provided under the sludge separation tank (100). The method of claim 1,
A device for separating and discharging low specific gravity sludge, characterized in that the supernatant pipe 110 for discharging the supernatant 200 separated from the bioreactor mixed solution 210 is further provided on the upper portion of the sludge separation tank 100 . The method of claim 1,
Separation and discharging device for low specific gravity sludge, characterized in that it further comprises a lifting means for elevating the plurality of swash plates (180) and the rotating means. 12. The method of claim 11,
The elevating means is
a lifting frame 300 installed on the inclined surface 157 and including the plurality of inclined plates 180;
a lifting cable 320 connected to the lifting frame 300;
A device for separating and discharging low specific gravity sludge, comprising: a lifting roller (310) for guiding the lifting frame (300) for lifting and lowering with respect to the sludge separation tank (100). 13. The method of claim 12,
Further comprising a drawing pump 330 installed on the lifting frame 300,
The low specific gravity sludge pipe 160 is a device for separating and discharging low specific gravity sludge, characterized in that it is connected to the drawing pump (330). A device for separating and discharging low specific gravity sludge according to any one of claims 1 to 13;
a bioreactor 20 for introducing the bioreactor mixture into the sludge separation tank 100 of the separation and discharge device;
a sludge storage tank 50 connected to the bioreactor 20 and into which the low specific gravity sludge 220 separated from the sludge separation tank 100 is put; and
A supernatant pipe 110 connected between the upper portion of the sludge separation tank 100 and the bioreactor 20 and returning the supernatant 200 separated from the bioreactor mixed solution 210; A system comprising a device for separating and discharging low specific gravity sludge. 15. The method of claim 14,
A high specific gravity sludge pipe 130 connected between the lower part of the sludge separation tank 100 and the bioreactor 20 to return the high specific gravity sludge 230 separated from the bioreactor mixed solution 210; A system comprising a device for separating and discharging low specific gravity sludge, characterized in that it comprises. 15. The method of claim 14,
The system including a device for separating and discharging low specific gravity sludge, characterized in that the inclined surface 157 of the sludge separation tank 100 is an inclined plate area 182 in which a plurality of inclined plates 180 are installed. A device for separating and discharging low specific gravity sludge according to any one of claims 1 to 13;
a bioreactor 20 for accommodating the separation and discharge device therein; and
A sludge storage tank 50 connected to the bioreactor 20 and into which the low specific gravity sludge 220 separated from the sludge separation tank 100 is input; containing system. 18. The method of claim 17,
The inclined surface 157 of the sludge separation tank 100 is composed of a swash plate region 182 in which a plurality of swash plates 180 are installed and a microorganism region 185 in which the swash plate 180 is not installed. A system comprising a device for separating and discharging low specific gravity sludge. Injecting the bioreactor mixture 210 of the bioreactor 20 into the sludge separation tank 100 (S100);
opening the inclined plate 180 in the sludge separation tank 100 and precipitating the bioreactor mixture 210 for a predetermined time (S110);
determining whether the optical sensor installed in the sludge separation tank 100 has received an optical signal (S120);
returning the supernatant 200 separated from the bioreactor mixture 210 to the bioreactor 20 when the optical signal is received (S130);
closing the swash plate 180 (S140);
discharging the low specific gravity sludge 220 on the swash plate 180 to the low specific gravity sludge pipe 160 along the swash plate 180 (S150); and
Returning the high specific gravity sludge 230 under the swash plate 180 to the bioreactor 20 (S160); an operating method of a system including a device for separating and discharging low specific gravity sludge, characterized in that it comprises a.

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