KR20160134337A - System for treating wastewater with high concentrations of phosphorus and suspended solid - Google Patents

Abstract

Application No. 10-2013-0128612, filed by the present applicant of the present invention, discloses an improved hybrid system for mixing and sedimentation and filtration for treating wastewater with high concentration of phosphorus and suspended substances, and a method for treating waste water and wastewater using the same When the wastewater is introduced into the slow stirring sedimentation tank, the air is introduced into the wastewater tank, so that the flow rate of the wastewater is maintained at a constant level regardless of the inflow rate of the wastewater. Thus, And a new type of high concentration phosphorus and suspended solids-containing wastewater treatment system for allowing suspended matter to separate and discharge from the wastewater. The present invention relates to a storage tank (10) for storing a high concentration phosphorus and a bottom / wastewater containing suspended substances, which have been preliminarily set in time; An in-line mixer 20 for mixing the flocculant into the wastewater discharged from the storage tank 10; A fiber filter (50) for filtering immature agglomerated flocs of pre-set coagulation floc (floc) to perform a filtration function; Line mixer 20 and the front end of the fiber filter 50 in order to simultaneously perform agitation and precipitation functions to form a coagulated floc of a predetermined diameter or less and to form a fiber filter 50), and a slow stirring sedimentation tank (30) functioning as a sedimentation tank for discharging the precipitated sludge to the dewatering tank (40). The high concentration and suspended solids / wastewater treatment system The suspended stirring and sedimentation tank 30 maintains the swirling flow when the lower and wastewater flows, and the high-concentration phosphorus and suspended matters contained in the lower and wastewater are separated from the lower and wastewater by centrifugal force and gravity, And then discharged.

Description

[0001] The present invention relates to a system for treating a high concentration of phosphorus and suspended solid,

More particularly, the present invention relates to a system for treating waste water and wastewater containing a high concentration of phosphorus and suspended matter generated in a sewage, sewage, sewage or wastewater treatment plant or construction site, And more particularly, to a high concentration phosphorus and suspended solids / wastewater treatment system so that the treatment for agitation, precipitation and filtration are performed integrally in a smaller space than in the prior art.

Particularly, when submerged / wastewater flows into the slow stirring sedimentation tank, air flows together, thereby maintaining the flow rate of the submerged / wastewater at a certain level regardless of the flow rate of the submerged / wastewater, And a suspended solids / wastewater treatment system containing suspended solids and suspended solids such that the suspended solids are separated and discharged after settling.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a view showing a treatment system for a waste water / wastewater containing phosphorus at a high concentration according to a conventional technique. Referring to Fig. 1, the treatment system for the bottom / wastewater containing phosphorus at a high concentration includes a storage tank 1, a rapid stirring tank 2, a slow stirring tank 3 and a settling tank 4.

The storage tank (1) collects and supplies collected and supplied wastewater containing high-concentration mixed waste water and high-concentration phosphorus and suspended substances resulting from the sludge concentration filtrate and sludge dehydration filtrate corresponding to influent water. On the other hand, the storage tank 1 may be subjected to a pretreatment process for passing the waste water containing high-concentration phosphorus, which corresponds to the influent water, through the silt or screen.

The rapid stirring tank (2) and the slow stirring tank (3) each agitate the bottom and wastewater containing the high-purity phosphorus stored in the storage tank (1) using a coagulant at a rapid rate and a slow rate, respectively, , Agglomerated on the settler (4), and other substances are deposited on the floor.

Thus, the treated water can be taken out to the outside.

The system for treating waste water and wastewater containing phosphorus at a high concentration according to the prior art has a problem that the rapid stirring tank 2 takes up a large volume and the space required for mixing the chemicals is excessive.

In addition, when operating with the slow stirring tank 3 and the settling tank 4, there is a disadvantage that a large space is required for each operation.

Due to the above-mentioned problems, the applicant of the present invention has proposed a hybrid system with stirring, sedimentation and filtration for treatment of waste water and wastewater containing high concentration phosphorus and suspended substances, and a wastewater treatment Method ", it is understood that stirring, sedimentation, and filtration for treatment of waste water and wastewater containing high concentrations of phosphorus and suspended substances occurring in sewage, sewage, sewage and wastewater treatment plants or construction sites, To be performed.

When the flow rate is increased in order to increase the flow rate of the influent water flowing into the slow stirring sedimentation tank, the time for residence of the bottom and the wastewater is short and it is difficult to secure a high sedimentation rate of the high concentration phosphorus and suspended matters contained in the wastewater.

Patent Document 1: Korean Patent Registration No. 10-0999369 entitled " Integrated Water Treatment Device for Treatment of Wastewater, Patent Document 2: Korean Patent Registration No. 10-1161801 'Advanced Treatment System of O / Wastewater with High Pollutant Load Fluctuation and Advanced Treatment Method' Patent Document 3: Korean Patent Laid-Open No. 10-2008-0010909 'Water treatment apparatus and water treatment method in which an immersion membrane module is integrated in a fiber filter' Patent Document 4: Korean Patent Application No. 10-2013-0128612 'Integrated Hybrid System for Agitation, Precipitation and Filtration for Treatment of Substrate and Suspended Wastewater Containing High Phosphorus and Suspended Substance,

Therefore, the present invention has been proposed in order to overcome such a conventional problem, and it is an object of the present invention to provide an apparatus and a method for producing a high-concentration phosphorus- This is an improvement of the integrated hybrid system and the method of treating wastewater by using it. When the wastewater is introduced into the slow stirring sedimentation tank, the air flows in together, so that the flow rate of the wastewater is regulated regardless of the flow rate of the wastewater. And a new type of high concentration phosphorus and suspended solids-containing wastewater treatment system which is maintained at a predetermined level or higher and which allows high-concentration phosphorus and suspended matters contained in the lower and wastewater to be separated from the lower and wastewater by centrifugal force, The purpose.

According to an aspect of the present invention for achieving the above-mentioned object, there is provided a storage tank, comprising: a storage tank (10) storing a high concentration phosphorus and a bottom / wastewater containing suspended substances; An in-line mixer 20 for mixing the flocculant into the wastewater discharged from the storage tank 10; A fiber filter (50) for filtering immature agglomerated flocs of pre-set coagulation floc (floc) to perform a filtration function; Line mixer 20 and the front end of the fiber filter 50 in order to simultaneously perform agitation and precipitation functions to form a coagulated floc of a predetermined diameter or less and to form a fiber filter 50), and a slow stirring sedimentation tank (30) functioning as a sedimentation tank for discharging the precipitated sludge to the dewatering tank (40). The high concentration and suspended solids / wastewater treatment system The suspended stirring and sedimentation tank 30 maintains the swirling flow when the lower and wastewater flows, and the high-concentration phosphorus and suspended matters contained in the lower and wastewater are separated from the lower and wastewater by centrifugal force and gravity, And then discharged.

In the submerged sedimentation tank 30 having a high concentration of phosphorus and suspended solids according to the present invention, the slow stirring sedimentation tank 30 allows the submerged sedimentation tank 30 to flow together with the air when the submerged wastewater flows therein, The flow rate of the wastewater is maintained at a predetermined level or higher so that the high concentration phosphorus and suspended matters contained in the wastewater and the wastewater are separated from the wastewater by the centrifugal force and are discharged after being precipitated.

In the highly concentrated phosphorus and suspended solids / wastewater treatment system according to the present invention, the slow stirring settling tank 30 has a cylindrical shape and is connected to the in-line mixer 20 to form an inlet port 32a And an outlet 32b connected to the fiber filter 50 for discharging fine particles or immature flocs which are not precipitated and connected to the dewatering tank 40 at a lower portion to discharge sedimented sludge, An outer tube 32 having an inner tube 32c; An air blowing blower 34 installed on the side of the inlet 32a of the outer cylinder 32 for injecting air into the inside of the outer cylinder 32 together with the wastewater flowing into the inline mixer 20, ; An inner cylinder (36) located inside the outer cylinder (32) and formed in a cylindrical shape; The lower and wastewater flows into the upper and lower wastewater flow paths 32 and 32 so as to increase the sedimentation rate of the high concentration and suspended matters contained in the wastewater flowing into the inflow port 32a. And a prevention plate 38 for maintaining the swirling flow.

In the high-concentration phosphorus and suspended-material-containing wastewater treatment system according to the present invention, the prevention plate 38 has one surface corresponding to the outer circumferential surface of the inner tube 36, and the other surface corresponding to the inner circumferential surface of the outer tube 32 A plurality of guards 33 adjacent to each other and formed of a plurality of guards 33 having a flat plate shape are installed spirally so as to have a predetermined inclination between the outer cylinder 32 and the inner cylinder 36.

In the high concentration phosphorus and suspended solids-containing wastewater treatment system according to the present invention, the guard 33 adjacent to each other is overlapped by the setting area to form the prevention plate 38. [

The guard 33 adjacent to each other in the high-phosphorous and suspended-material-containing wastewater treatment system according to the present invention is installed at a predetermined height.

In the high-phosphorous and suspended-material-containing wastewater treatment system according to the present invention, the prevention plate 38 is installed in a plurality of rows in the vertical direction.

As described above, according to the present invention, it is possible to provide a high-concentration phosphorus-containing and wastewater-containing wastewater treatment system for sewage, wastewater, and sewage and wastewater treatment Stirring, precipitation and filtration can be carried out in a small space as compared with the conventional one. Particularly, when submerged wastewater flows into the slow stirring settling tank, air can be introduced together with the wastewater, The sedimentation rate of the precipitated sludge can be increased because the flow velocity is maintained at a certain level and the high concentration phosphorus and suspended matters contained in the waste water and wastewater are separated and discharged from the waste water and wastewater by the centrifugal force.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a system for treating waste water and wastewater containing phosphorus at a high concentration according to the prior art,
FIG. 2 is a diagram for comparing a conventional wastewater treatment system containing a high concentration phosphorus and a suspended substance, and a conventional wastewater treatment system containing phosphorus at a high concentration according to a preferred embodiment of the present invention,
3 is a view for explaining the constituent elements and operation concept of a high concentration phosphorus and suspended solids-containing wastewater treatment system according to a preferred embodiment of the present invention,
4 is a view for explaining a slow stirring settling tank in a high concentration phosphorus and suspended solids / wastewater treatment system according to a preferred embodiment of the present invention,
FIG. 5 is a plan view of a prevention plate in a high concentration phosphorus and suspended solids / wastewater treatment system according to a preferred embodiment of the present invention.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to FIGS. 2 to 5, and the same reference numerals are used for components that perform the same functions in FIGS. 2 to 5. In the drawings and the detailed description, detailed description of specific elements and functions of elements not directly related to the technical features of the present invention will be omitted. .

2 to 5, a high concentration phosphorus and suspended solids / wastewater treatment system according to a preferred embodiment of the present invention includes a storage tank 10, an in-line mixer 20, By including the settling tank 30, the dehydrating tank 40, the fiber filter 50, and the aeration tank 60, excellent phosphorus removal performance can be obtained in a smaller space.

The storage tank 10 is formed at the front end of the in-line mixer 20 in order to mitigate the fluctuation of the flow rate and the phosphorus concentration at the time of inflow into the high-concentration phosphorus and suspended- do.

That is, the storage tank 10 functions to store the lowered wastewater that has been introduced for a predetermined time in order to mitigate the influence of agitation, sedimentation, and deterioration of the efficiency of the filtration process due to fluctuation of the load due to the incoming wastewater. do.

The in-line mixer 20 is formed in the in-line type in the passage between the storage tank 10 and the slow stirring settling tank 30 so as to achieve high-speed mixing of the flocculant without requiring a site. That is, the in-line mixer 20 is connected to the conventional rapid stirring tank 2 (see FIG. 1 (a)) at the rear end of the storage tank 10 in order to apply the same to inflow water, ), It is possible to reduce the space required for mixing the drug using the coagulant.

The slow stirring settling tank 30 simultaneously performs the functions of slow mixing and precipitation on a smaller scale than the conventional technique. That is, the slow stirring settling tank 30 performs the slow mixing reaction and the sludge settling in a single batch in the coagulation reaction process. The slow stirring settling tank 30 is formed in a small capacity in place of the conventional operation mode using the slow stirring vessel 3 (see FIG. 1) and the settling tank 4 (see FIG. 1), and is connected to the fiber filter 50 .

In other words, the slow stirring settling tank 30 compensates for the disadvantage that a large space is required when the conventional slow stirring tank 3 and the settling tank 4 are operated separately. Thus, an in-line mixer 20 to reduce the residence time of the wastewater or wastewater, thereby providing a function of forming cohesive flocs in a smaller space.

When the submerged sedimentation tank 30 flows into the submerged sedimentation tank 30, the swirling flow is maintained. The high-concentration phosphorus and suspended substances contained in the submerged and wastewater are separated from the submerged wastewater by centrifugal force and gravity, To be discharged.

That is, in order to obtain the effect of centrifugal force, the slow stirring sedimentation tank (30) allows the lower and wastewater to flow together with the air when the wastewater is introduced, thereby maintaining the flow rate of the wastewater and the wastewater constant, So that the high phosphorus and suspended matters contained in the waste water are separated and discharged from the waste water.

In the meantime, in the present invention, when the lower and wastewater are introduced, air is injected together to maintain the flow rate at a certain level. However, the lower and wastewater in the slow stirring settling tank 30 can be circulated and flowed to maintain the flow rate.

As described above, when the submerged sedimentation tank 30 is introduced with the air, the residence time of the submerged and wastewater can be ensured, and the effect of agitation and sedimentation can be enhanced. Thus, the high concentration Phosphorus and suspended solids can be separated.

The slow stirring settling tank 30 includes the outer cylinder 32, the air injection blower 34, the inner cylinder 36, and the prevention plate 38. [

The outer tube 32 has a cylindrical shape and is connected to the in-line mixer 20 and has an inlet port 32a through which the lower and the wastewater flows. The outer tube 32 is connected to the fiber filter 50 to form fine particles or immature cohesive flocs And an outlet port 32c connected to the dewatering tank 40 at a lower portion thereof for discharging the precipitated sludge. An air outlet 32d is formed on the upper side so that the air introduced through the air introducing blower 34 to be described later turns along the prevention plate 38 and is discharged to the outside.

The air blowing blower 34 is provided on the side of the inlet 32a of the outer cylinder 32 to inject air into the outer cylinder 32 together with the wastewater flowing from the in-line mixer 20, The inner cylinder 36 is located inside the outer cylinder 32 and is formed in a cylindrical shape.

In this way, by providing the air-introducing blower 34 in the slow stirring settling tank 30, air can be injected together with the lower and the wastewater, and the flow rate necessary for securing the centrifugal force can be maintained even if the inflow rate of the lower and wastewater is not large .

The prevention plate 38 is provided between the outer cylinder 32 and the inner cylinder 36 and is provided on the upper side of the inlet 32a of the outer cylinder 32. The prevention plate 38 is provided on the lower side of the outer cylinder 32, The swirling flow of the wastewater is maintained to prevent the sedimentation rate of the high concentration phosphorus and suspended matters contained in the wastewater and wastewater from being reduced and to prevent the inflow air along with the wastewater from being discharged vertically.

The guard plate 38 is composed of a plurality of guards 33 whose one surface corresponds to the outer circumferential surface of the inner cylinder 36 and whose other surface corresponds to the inner circumferential surface of the outer cylinder 32 and a plurality of adjacent guards 33 And is provided spirally so as to have a predetermined inclination between the outer cylinder 32 and the inner cylinder 36. Here, it is preferable that the adjacent guards 33 are composed of eight, and the inner tube 36 is turned one turn, and the inclination is preferably set between 10 and 20 degrees.

By providing the prevention plate 38 with a predetermined inclination in this way, the wastewater flowing into the inlet port 3a of the outer cylinder 32 is kept in a spiral shape by the prevention plate 38, The settling rate of precipitated sludge of high concentration phosphorus and suspended solids contained in wastewater is increased.

On the other hand, the guard 33 guides the flow of the lower and wastewater, and superimposes the wastewater and the wastewater flowing through the inlet 32a of the outer barrel 32, Preferably, the guard 33 is rotated by 90 degrees in order to induce the flow of the waste water and wastewater. The guard 33 is installed between the guard 33 and the guard 33, That is, as shown in FIG. 5, the guards 33, which are installed so as to overlap the guards 33 by rotating the guards 33 by 45 degrees, are spaced apart by a height difference of 10 mm to 20 mm.

As described above, a plurality of guards 33 formed of flat plates are adjacent to each other. The guard 33 adjacent to the guards 33 is installed in a plurality of rows in the vertical direction, .

In the present invention, the protection plates 38 are provided in two rows, and the height of the first row and the second row are set to be different from each other by 30 mm to 40 mm. However, this is merely an example of the prevention plate 38, It will be understood by those of ordinary skill in the art that various changes and modifications may be made.

On the other hand, the anti-blocking plate 38 provided at the lowermost part of the anti-blocking plate 38 provided at a plurality of rows is installed behind the anti-blocking plate 38 provided immediately above by a predetermined angle. Here, it is preferable that the predetermined angle is 45 degrees, because the guards 33 are arranged so as to overlap each other by the degree of overlapping, that is, by 45 degrees, so that they correspond to the overlap.

As shown in FIG. 5, the 'starting point of one row' is installed at the rear side (45 ° difference) when viewed from a plane than the 'starting point of two rows', and flows along with the inflow and outflow water flowing through the inlet port 32a of the outer cylinder 32 So that the air can be prevented from being directly discharged vertically.

By providing the prevention plate 38 between the outer cylinder 32 and the inner cylinder 36 as described above, the waste water / wastewater flowing through the inlet 32a of the outer cylinder 32 is maintained in the swirling flow along the prevention plate 38 Therefore, it is possible to prevent the settling rate of precipitated sludge from decreasing due to an increase in the residence time in the slow stirring sedimentation tank (30).

Such a slow stirring settling tank 30 forms a coagulated floc up to about 50 탆 and not only discharges immature coagulated floc to the fiber filter 50 but also precipitates the sludge, And the sludge is discharged to the dewatering tank (40).

On the other hand, since the fiber filter 50 to be described later can be removed at a high efficiency of 90% or more even if it is only about 50 탆 based on the particle size, the slow stirring settling tank 30 can prevent the size of the coagulated floc 50 탆) or less, and the capacity can be greatly reduced.

In addition, the effect of the sedimentation tank, as well as the effect of slow stirring on the slow stirring settling tank 30, together with the effect of the sedimentation tank reduces the load of the solid material flowing into the fiber filter 50, In order to further reduce the capacity of the battery.

The dewatering tank 40 receives and stores the sludge generated by the precipitation from the slow stirring settling tank 30.

The fiber filter 50 is formed at the rear end of the slow stirring settling tank 30 to filter the immature flocculated floc in the slow stirring settling tank 30 and the immature flocculated floc is separated from the filtered bottom wastewater To the aeration tank (60). That is, the fiber filter 50 is formed at the rear end of the slow stirring settling tank 30, so that the coagulated floc formed in the slow stirring settling tank 30 is removed. More specifically, the fiber filter 50 has the effect of allowing complete immersion of fine agglomerated particles in the slow stirring settling tank 30 even if the agglomerated microaggregated particles do not settle out, and at the same time, the capacity of the slow stirring settling tank 30 is reduced And the like.

The fiber filter 50 has the function of being able to filter the immature flocculated floc so that the wastewater containing high phosphorus and suspended matters is mixed with the flocculant used before the in- Thereby reducing the amount of medicine used, thereby providing a medicine cost saving effect.

The fiber filter 50 allows the treated wastewater to flow into the aeration tank 60, thereby reducing the influent load factor of the aeration tank 60 in the entire wastewater treatment process, unlike the case of the conventional wastewater treatment plant Provides an effect. Particularly, in the case of the reflux water, since the reflux water pretreated with the air is introduced into the reflux furnace 60, the influent load ratio of the phosphorus and suspended solids in the entire waste water treatment process can be greatly reduced.

With this configuration, when treating waste water and wastewater containing high concentrations of phosphorus and suspended matter generated in the sewage and wastewater treatment plants using a high-concentration phosphorus and wastewater treatment system, it is possible to reduce the phosphorus concentration in the effluent of the wastewater treatment plant It can be expected that the size of the in-line mixer 20, the slow stirring settling tank 30 and the fiber filter 50 can be reduced, Wastewater treatment is possible.

Particularly, when the wastewater flows into the slow stirring settling tank (30), air is introduced into the wastewater by the centrifugal force by keeping the flow rate of the wastewater and the wastewater equal to or above a certain level irrespective of the flow rate of the wastewater. And the sedimentation rate of the precipitated sludge can be increased because the high concentration phosphorus and suspended matters are separated and separated from the bottom and wastewater.

Although a high concentration phosphorus and suspended solids / wastewater treatment system according to a preferred embodiment of the present invention as described above has been illustrated in accordance with the above description and drawings, it is merely illustrative and not limitative of the present invention It will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the present invention.

1: Storage tank 2: Rapid stirring tank
3: Slowly stirred tank 4: Settling tank
10: Storage tank 20: In-line mixer
30: Slow stirring tank 32:
34: air blowing blower 36: inner cylinder
38: preventing plate 40: dehydrating tank
50: fiber filter 60: aeration tank

Claims (7)

A storage tank (10) for storing a high concentration phosphorus and a bottom / wastewater containing suspended substances, which have been introduced for a predetermined time; An in-line mixer 20 for mixing the flocculant into the wastewater discharged from the storage tank 10; A fiber filter (50) for filtering immature agglomerated flocs of pre-set coagulation floc (floc) to perform a filtration function; Line mixer 20 and the front end of the fiber filter 50 in order to simultaneously perform agitation and precipitation functions to form a coagulated floc of a predetermined diameter or less and to form a fiber filter 50), and a slow stirring sedimentation tank (30) functioning as a sedimentation tank for discharging the precipitated sludge to the dewatering tank (40). The high concentration and suspended solids / wastewater treatment system In this case,
The high-concentration phosphorus and suspended matters contained in the bottom and wastewater are separated from the bottom and the wastewater by the action of centrifugal force and gravity, and then precipitated and discharged Wherein the high concentration phosphorus and suspended solids-containing bottom wastewater treatment system is characterized in that
The method according to claim 1,
The slow stirring settling tank 30 is configured to allow the lower stirring waters to flow together with the air when the lower wastewater flows in and maintain the flow rate of the lower wastewater equal to or above a certain level irrespective of the inflow rate of the wastewater, Wherein the high phosphorus and suspended solids are separated from the bottom and the wastewater and are discharged after being precipitated.
3. The method according to any one of claims 1 to 3,
The slow stirring settling tank 30 has a cylindrical shape and is connected to the in-line mixer 20 and has an inlet port 32a through which the lower and wastewater flows. The slow stirring settling tank 30 is connected to the fiber filter 50, (32) having an outlet (32b) for discharging immature flocs and an outlet (32c) connected to the dewatering tank (40) at the bottom for discharging the precipitated sludge;
An air blowing blower 34 installed on the side of the inlet 32a of the outer cylinder 32 for injecting air into the inside of the outer cylinder 32 together with the wastewater flowing into the inline mixer 20, ;
An inner cylinder (36) located inside the outer cylinder (32) and formed in a cylindrical shape;
The lower and wastewater flows into the upper and lower wastewater flow paths 32 and 32 so as to increase the sedimentation rate of the high concentration and suspended matters contained in the wastewater flowing into the inflow port 32a. And a blocking plate (38) for maintaining the swirling flow. ≪ Desc / Clms Page number 19 >
The method of claim 3,
The prevention plate 38 is composed of a plurality of guards 33 having one surface corresponding to the outer circumferential surface of the inner cylinder 36 and the other surface having a flat plate shape corresponding to the inner circumferential surface of the outer cylinder 32, 33) is installed spirally so as to have a predetermined inclination between the outer cylinder (32) and the inner cylinder (36).
5. The method of claim 4,
So that the guard (33) adjacent to each other is overlapped by the setting area to form the prevention plate (38).
6. The method of claim 5,
Wherein the guard (33) adjacent to each other is spaced apart from the guard (33) by a predetermined height.
The method of claim 3,
Wherein the prevention plate (38) is installed in a plurality of rows in a vertical direction.

Images