KR101758594B1 - Select operation possible type rise and precipitation integrated waste water treatment system - Google Patents

Select operation possible type rise and precipitation integrated waste water treatment system Download PDF

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Publication number
KR101758594B1
KR101758594B1 KR1020150124814A KR20150124814A KR101758594B1 KR 101758594 B1 KR101758594 B1 KR 101758594B1 KR 1020150124814 A KR1020150124814 A KR 1020150124814A KR 20150124814 A KR20150124814 A KR 20150124814A KR 101758594 B1 KR101758594 B1 KR 101758594B1
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South Korea
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tank
wastewater
sludge
pressurized water
settling
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KR1020150124814A
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Korean (ko)
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KR20170028039A (en
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박찬홍
홍성민
임형욱
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(주)티에스이엔씨
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/003—Sedimentation tanks provided with a plurality of compartments separated by a partition wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/0039—Settling tanks provided with contact surfaces, e.g. baffles, particles
    • B01D21/0048—Plurality of plates inclined in alternating directions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/2433—Discharge mechanisms for floating particles
    • B01D21/2438—Discharge mechanisms for floating particles provided with scrapers on the liquid surface for removing floating particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/2444—Discharge mechanisms for the classified liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/245—Discharge mechanisms for the sediments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/28—Mechanical auxiliary equipment for acceleration of sedimentation, e.g. by vibrators or the like
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/24—Treatment of water, waste water, or sewage by flotation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Physical Water Treatments (AREA)

Abstract

The present invention relates to a neutralization tank for neutralizing wastewater; An agglomeration tank for agglomerating the wastewater passing through the neutralization tank; A pressurized water spraying tank which pressurizes the wastewater passing through the flocculation tank by using a pressurized water spray nozzle; A floatation tank for removing scum that is a floating matter generated from the wastewater via the pressurized water spray; A slope plate settling tank for settling the sludge remaining in the wastewater flowing along the passage connected to the lower end of the floating separation tank; And a bypass conduit connected from the lower end of the swash plate sedimentation tank and returning the sludge to the neutralization tank side by the sludge return pump.
Flocs agglomerated by sludge in a neutralization tank and an agglomeration tank are injected under pressure in a pressurized water spray tank and are floated by fine air bubbles, the scum is removed, and the untreated sludge settled in the slab plate settler is recycled The present invention provides an integrated wastewater treatment system for highly oxidizing treatment, which is capable of remarkably lowering the pollution degree of wastewater by repeatedly performing a series of processes of coagulating after flocculation by neutralization tank, .

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an integrated wastewater treatment system,

The present invention relates to a system for integrated treatment of wastewater and wastewater in connection with sedimentation and floatation. The wastewater is floated in floatation tank through neutralization tank and flocculation tank to remove scum, then sludge is precipitated, The present invention relates to a flooded-sedimentation-integrated wastewater treatment system capable of performing complex and selective operation, thereby improving scum removal efficiency.

Conventional wastewater treatment processes involve mixing, coagulation, sedimentation, rapid filtration, etc. This method is a method of introducing coagulant in the mixing tank after the introduction of raw water, stirring rapidly, A float separation method and a floating separation method in which air is adhered to a floating oil phase dispersed in a dispersion medium to float to the limit surface where the dispersion medium and air are in contact,

The sedimentation separation method and the floatation separation method are selected according to the characteristics of wastewater. Generally, when wastewater contains high concentration organic material, algae, oil and grease, synthetic detergent, iron, magnesium, heavy metals, etc., Can be advantageous.

In the sedimentation separation method, it is necessary to gradually separate the suspended matters from the stagnant water or the slow-flowing water, so that it takes a long time for the treatment and a large area is required for the installation of the sedimentation bed, .

Also, water treatment by sedimentation separation method according to the precipitation method is relatively suitable for treating water having good water quality in the raw water, and mainly for removing suspended substances in water. In the treatment of waste water for sewage treatment, It is difficult to remove various contaminants only by the conventional precipitation method.

On the other hand, in the case of the float separation method, since the pollutant source is treated after being floated, the treatment time is shorter than that of the sedimentation separation method, and there is no need to increase the site area. That is, high concentration organic substances, heavy metals, ABS (Alkylbenzene sulfonates) and the like.

The above-mentioned flotation separation method can be classified into a pressurized flotation method and a reduced pressure flotation method in accordance with a method of generating bubbles. Japanese Patent Laid-Open Publication No. 2002-0092717 discloses a combination of a pressurized water generator and a rotary blade. Korean Unexamined Patent Application Publication No. 2002-0016377 discloses that a settling portion is disposed at the front portion of a pressurized floating tank. In the case of these prior patents, a combination of a pressurized floating tank and a sludge scraper performing a scum removing function, Structure.

However, there are contamination sources having a relatively large specific gravity in the wastewater, and such heavy contamination sources have a problem that it is difficult to completely remove the heavy pollution sources by the conventional pressurized floating vessel and the sludge scraper alone.

That is, it is known that a bubble supplying a float force to the sludge has a size of several micrometers to several tens of nanometers, and most of the light materials such as oil, grease, magnesium and the like can float sufficiently, And materials that are not floating by bubbles can not be sufficiently separated.

Therefore, in order to prevent the sludge from being removed sufficiently by the pressurized flotation tank, additional means for sludge agglomeration and the function of the slope plate settling tank have been required. For example, Korean Patent Publication No. 2003-0079414, At the same time, the wastewater treatment system can solve the problem of the conventional pressurized floating bed, but it is necessary to use a mixed facility, which is a separate facility when administering the medicines for flocculation and sedimentation separation. There was a problem.

In view of this, Japanese Patent Laid-Open No. 10-0435586 discloses a wastewater treatment system using a pressurized float tank, which can supply water treatment chemicals to wastewater without mixing tank for flocculation and sedimentation treatment, A system is provided which enables removal of contaminants not floating in the floating tank.

However, in the above-mentioned patent, unloaded sludge is transferred to the sludge concentration tank from the sloping tank settling tank and eventually discharged, which causes a problem in that the amount of sludge is considerable, and the contamination sources removed by the scum can not be partially removed, The wastewater is supplied to the process, and the water quality of the water source may be lowered.

Korean Patent Registration No. 10-0435586 Korean Patent Publication No. 2002-0092717 Korean Patent Publication No. 2002-0016377 Korean Patent Publication No. 2003-0079414

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above circumstances and provides a treatment system for treating wastewater, After the remaining unremoved sludge has been settled, the sedimented residual sludge is reused and floated by flocculation through the neutralization tank and the flocculation tank to be repeatedly used. As a result, And to reduce the pollution level of the water as much as possible.

According to an aspect of the present invention,

A neutralization tank for neutralizing wastewater,

An agglomeration tank for agglomerating the wastewater that has passed through the neutralization tank,

A pressurized water spraying operation in which the wastewater passing through the flocculation tank is pressurized by using a pressurized water spray nozzle,

A floating separation tank for removing scum, which is a floating matter generated in the wastewater via the pressurized water spraying,

A slope slope plate settling tank for settling the sludge remaining in the wastewater that is moved along the passage connected to the lower end of the floatation tank,

And a bypass pipe connected from the lower end of the slope plate swash plate settling tank and returning the sludge to the neutralization tank side by a sludge return pump.

According to the present invention, the flocs agglomerated by the sludge in the neutralization tank and the flocculation tank are pressurized and injected in the pressurized water spraying tank and are floated by fine air bubbles. Then, the scum is removed and the untreated The sludge is recycled, bypassed and returned to the neutralization tank, and then subjected to repeated flocculation and flocculation processes. Thus, the contamination degree of wastewater can be remarkably lowered.

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
FIG. 2 is a schematic enlarged view showing an enlarged view of the pressurized water spray, the floating separation tank, and the slope plate settling tank in FIG.

It is to be understood that the words or words used in the present specification and claims are not to be construed in a conventional or dictionary sense and that the inventor can properly define the concept of the term in order to describe its invention in the best way Accordingly, the present invention should be construed as meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the specification of the present invention and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. It should be understood that various equivalents and modifications are possible or possible.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in the accompanying drawings, the present invention relates to a system for treating wastewater, comprising a neutralization tank 200 for neutralizing wastewater and a flocculation tank 210 for coagulating wastewater passing through the neutralization tank 200 A pressurized water spraying tank 300 for pressurizing the wastewater passing through the flocculation tank 210 and a floating separation tank 300 for removing scum that is a floating material generated in the wastewater via the pressurized water spraying tank 300 A slope plate settling tank 500 for settling the sludge remaining in the wastewater flowing along the passage connected to the lower end of the floatation tank 400, And a sludge bypass line 100 for returning the sludge to the sludge bypass line 100.

A known technique is applied to the neutralization tank 200 and the flocculation tank 210, and an agitator 220 is provided therein.

The wastewater passing through the neutralization tank 200 and the flocculation tank 210 is introduced into the pressurized water spraying tank 300. The pressurized water spraying nozzle 300 is provided in the pressurized water spraying tank 300 have.

The pressurized water injection nozzle 310 forms air bubbles in the form of fine particles by bubbling dissolved oxygen contained in the wastewater, so that the sludge in the wastewater flowing from the wastewater flows up in the floating tank to form a scum , Thereby maximizing the efficiency of scum floatation.

The pressurized water injection nozzle 310 according to the present invention is an injection nozzle for injecting sludge in a wastewater purification apparatus, which is a domestic patent registration No. 10-1467206 (2014.11.25) Nozzle ', and the detailed configuration of the pressurized water injection nozzle 310 can be understood with reference to the previously registered patent documents of the above-mentioned cause.

On the other hand, the wastewater flowing into the pressurized water spraying vessel 300 as described above bubbles dissolved oxygen through the generation of bubbles in accordance with the acid gas in the pressurized injection nozzle 310, and forms air bubbles, so that the wastewater adheres to the sludge So that it floats above the pressurized water spraying tank 300.

The floating matter of the sludge resulting from the bubble formation of the pressurized injection nozzle 310 is referred to as a scum.

As described above, the scum floated on the upper surface of the pressurized water spraying tank 300 is carried to the floating separation tank 400. The partition 320 is formed between the pressurized water dispersion tank 300 and the floating separation tank 400, And the sludge that has not been floated can be guided to float by bubbles generated by the pressurized injection nozzle 310 in the pressurized water spraying tank 300 again.

When the scum floated in the pressurized water spraying tank 300 flows over the partition 320 toward the floatation separating tank 400, the scum flooding is performed on the upper surface of the floatation separating tank 400 So that the scum can be discharged through the scum discharge guide 420 provided on the side surface of the floating separation tank 400. [

Reference numeral 330 denotes a pressurizing pump. Reference numeral 340 denotes a pressurizing tank. Numeral 350 denotes a pressurizing tank. Reference numeral 350 denotes a pressurized water supply source It is a compressor.

The floating separating tank 400 has a conventional structure. As shown in the drawing, the floating separating tank 400 is provided with a removal port 412 spaced equidistantly from the conveyor 411, which is repeatedly circulated in an infinite locus on the wastewater surface, Shaped scum floated on the wastewater surface by removing the scum on the surface of the tank 400. The scum is removed from the scum discharge guide 400, 420, and is discharged to the outside.

The scum discharge guide 420 is inserted into the rear end of the floating separation tank and discharged to the scum discharge pipe 430 provided on the side of the scum discharge guide 420.

On the other hand, the wastewater removed by the scum in the floatation separation tank 400 is freed by the concentration tank separately provided outside, and is dehydrated and discharged.

The float separating tank 400 and the swash plate settling tank 500 are present in one case and the pressurized water spray tank 300 described above is also present in one case 1. [

That is, as shown in the drawing, the pressurized water spraying apparatus 300, the floating separating tank 400, and the inclined plate precipitation tank 500 are provided inside a case, and the pressurized water spraying apparatus 300 and the floating separating tank 400 A partition wall 320 extending from the bottom surface of the case 1 to the upper side of the case 1 and a scam discharge guide 420 at the upper rear end of the floating separation tank 400, It is preferable to form a second partition wall 510 which extends from the upper side to the lower side of the case 1 between the settling tanks 500 and is bent inwardly of the inclined plate precipitation tank 500.

The swash plate settling tank 500 in the case 1 is provided with a speed reducer 520 on the upper side thereof and a swash plate settler scraper 530 rotated by the speed reducer 520 is formed to the bottom surface of the swash plate settling tank 500 And a second scattering unit 540 for removing the scum flowing into the swash plate sedimentation tank 500 again on the upper surface of the immersion tank 500.

The wastewater treated transversely to the upper end of the inclined plate sedimentation tank 500 through the treatment water rectifying pipe 550 is discharged through a treatment water discharge end 560 provided at the end of the case 1 to be flown in a subsequent process .

Meanwhile, a swash plate 570 is formed in the swash plate settling tank 500 so that the sludge contained in the swash plate settling tank 500, which has not been treated, is dropped downward, Respectively.

The swash plate 570 is borrowed from the prior art. For example, Korean Patent Registration No. 10-0781400 entitled " Method for Solid-Liquid Separation from a Settling Site of Sewage Treatment Plant and Settling Paper for the Sewage Treatment Plant " As a matter of fact, the present invention is borrowed from the known technical structure.

The sludge remaining in the wastewater in the sloping plate settling tank 500 is settled and collected by the sloping plate settler scraper 530. The sludge collected in this way passes through the settling sludge bypass line 100, And then flocculated by the flocculating agent through the flocculating tank 210 to form flocs, and thereafter, a series of processes of generating scum through the pressurized water spraying tank 300 So that it can be repeatedly performed.

In the drawings of the present invention, reference numeral 110 denotes a sludge return pump for conveying sludge and returning the sludge.

Meanwhile, as described above, the sludge remaining in the wastewater is returned by bypass, gradually discharged to the scum, and then the sludge remaining until the last time is discharged to the outside by opening the sludge discharge pipe 120 connected to the sludge bypass pipe 100 .

In the present invention, the wastewater is treated by sequentially passing through the pressurized water spraying tank 300 and the slope plate settling tank 500. When the pressurized water spraying tank 300 and the slope plate settling tank 500 Or alternatively, the driving of the pressurized injection nozzle 310 in the pressurized water spraying tank 300 may be stopped in accordance with the constellation, and only the side of the inclined plate precipitation tank 500 may be used The remaining sludge may be settled and bypassed to the neutralization tank 200 side so that the wastewater can be treated by repeated cycles of neutralization, flocculation, and sedimentation.

As described above, both the pressurized water spraying tank 300 and the inclined plate settling tank 500 are simultaneously operated to treat the wastewater using both the pressurized spraying method and the settling method, or the pressurized water spraying of the pressurized water spraying tank 300 When the wastewater is treated only by the inclined plate settling tank 500 by stopping the nozzle 310, the operation of the wastewater can be controlled by the operation of the control unit.

Of course, the control operation of the control unit can be selectively switched by manual operation by observing the characteristics of the sludge contained in the wastewater by the driver (operator) by visual observation. Alternatively, the image obtained by picking up the properties of the sludge, It is possible to configure the control unit so as to be controllable by activating or deactivating the pressurizing pump 330, the pressurizing tank 340, and the air compressor 350 in the control unit after determining whether to operate the pressurized water spraying tank 300 will be.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Various modifications and changes may be made.

Accordingly, it is to be understood that the technical idea of the present invention is to be understood by the following claims, and all of its equivalents or equivalents fall within the technical scope of the present invention.

100; A sedimentation sludge bypass line 110; Sludge return pump
120; A sludge discharge pipe 200; Neutralization tank
210; Flocculation tank 220; agitator
300; Pressurized water spray 310; Pressurized water injection nozzle
320; A barrier 330; Pressure pump
340; A pressurizing tank 350; Air compressor
400; Floating separation tank 410; Refuse to squash
411; Conveyor 412; Removal port
420; Scum discharge guide 430; Scum discharge piping
500; Tilt plate sedimentation tank
510; A second bank 520; reducer
530; Swash plate settler scraper 540; Reject the second squad
550; A treated water rectifying pipe 560; Treated water discharge pipe
570; Swash plate

Claims (6)

A neutralization tank 200 for neutralizing wastewater,
An agglomeration tank 210 for agitating the wastewater passing through the neutralization tank 200,
A pressurized water spraying tank 300 for spraying sludge in a scum shape by an acid of dissolved oxygen sprayed to the wastewater passing through the flocculation tank 210 using a pressurized water spray nozzle 310,
A float separation tank 400 for removing scum, which is a float generated in the wastewater via the pressurized water spraying tank 300,
A slope plate settling tank 500 for settling the sludge remaining in the wastewater flowing along the passage connected to the lower end of the floating separation tank 400,
And a settling sludge bypass line 100 connected from the lower end of the inclined plate settler 500 and returning the sludge to the neutralization tank 200 side by the sludge return pump 110,
The pressurized water spraying tank 300 and the inclined plate settling tank 500 may be operated at the same time or the driving of the pressurized water spraying nozzle 310 in the pressurized water spraying tank 300 may be stopped in accordance with the characteristics of the sludge contained in the wastewater to be treated, Wherein the selective injection is performed by a selective injection and a settling method of the flocculation and precipitation method.
The method according to claim 1,
The pressurized water sprayer 300, the floating separator 400 and the inclined plate precipitator 500 are provided inside the case 1, and the case 300 is provided between the pressurized water sprayer 300 and the floating separator 400, A float 320 extending from the bottom to the top of the floatation separation tank 400 and a scum discharge guide 420 at the end of the floatation separation tank 400. The floating separation tank 400 and the slope plate settling tank 500 And forming a second partition wall (510) extending from the upper side to the lower side of the case (1) between the first partition wall (52) and the lower partition wall (52).
The method according to claim 1,
The swash plate settling tank 500 includes a speed reducer 520 disposed above the swash plate settling tank 500. A swash plate settler scraper 530 rotated by the speed reducer 520 is formed to a bottom surface of the swash plate settling tank 500, And a second sorting unit (540) for removing again the scum introduced into the swash plate sedimentation tank (500) on the upper surface of the swash plate sedimentation tank (500).
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KR1020150124814A 2015-09-03 2015-09-03 Select operation possible type rise and precipitation integrated waste water treatment system KR101758594B1 (en)

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KR101889517B1 (en) * 2017-10-25 2018-08-20 주식회사 라미나알앤디 Busangjo and settling culture change for waste water disposal plant

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KR101544546B1 (en) * 2015-03-31 2015-08-21 주식회사 케이디 Hybrid simple sewage treatment method and apparatus having high-speed sedimentation and floatation

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KR101889517B1 (en) * 2017-10-25 2018-08-20 주식회사 라미나알앤디 Busangjo and settling culture change for waste water disposal plant

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