KR20020022756A - Accumulation matter processing method and system for water purification of lake and reservoir - Google Patents

Abstract

PURPOSE: A sediment treatment method for purifying lake and reservoir water is provided, which can dredge sediment that is settled at the base of lake or fish-breeding pond and contain algae and plankton without recontamination the related water area by powerful suction of the sediment by pump and transferring to treatment area through pipe. The dredged area is further treated by mechanical mixing and recirculating aeration to change the stagnating water to a circulating water. CONSTITUTION: The method comprises the followings: (i) suck sediments at the base of lake or fish-breeding pond by pump equipped on a dredger(1) and transfer to bar screen(10) on ground through pipe; (ii) remove wood leaf, wood pieces and dust cloth from sediment by bar-screen(10); (iii) form fine floc by feeding coagulant to the foreign material removed sediment and agitating at 150-250 rpm for 30-90 minutes to coagulate organic and inorganic contaminants rapidly; (iv) double expand the volume of fine floc containing sediment by re-agitating at 50-70 rpm and settling for a fixed time; and (v) separate solid and liquid by settling the floc containing sediment through porous plate, partition plate and inclined plate in solid-liquid separation tank(29) and discharge supernatant after sterilizing with ozone, the solid matter being further treated by dewatering and fermentation.

Description

Accumulation matter processing method and system for water purification of lake and reservoir

The present invention relates to a method and a system for treating sedimentation for water purification of lakes and reservoirs, and more particularly, to sedimentation and sedimentation stacked on the bottom of a lake or reservoir to ground to separate water and solids, and to separate and purify. The present invention relates to a method and system for treating sedimentary sludge for purifying water quality of lakes and reservoirs by ozone treatment and returning them to lakes or reservoirs, and the sedimented solids being dehydrated and fermented and recycled as compost or soil improvers.

The inflow of living sewage, livestock waste, factory waste, and agricultural sewage due to industrial development and improvement of living standard, grow algae and plankton with high density, and the functions of lakes, reservoirs, and rivers used for water supply, agriculture and industrial water, etc. Is losing.

In order to use the contaminated lake or reservoir water as a water source, agricultural and industrial water, it is possible to purify by dredging the sedimentary silos accumulated on the bottom of the lake or reservoir.

The first method is to remove all the water from the lake or reservoir, remove excavators by using an excavator, etc., and then carry and store new water. The second installs fences on part or all of the surface of lakes and reservoirs, and blows air containing water into the lake or reservoir bottom from a large air compressor on the ground adjacent to the lake or reservoir to contaminate the fine air particles. To injure. Then narrow the fence to one side to collect and remove the injured contaminants.

However, blowing compressed air at the bottom of a lake or reservoir does not remove any thick sedimentary silts that have sunk at the bottom of the lake or reservoir and does not completely purify the water, resulting in high color and turbidity. Of course, the work time is longer.

The present invention for overcoming the problems of the present invention provides a lake and dredged by a dredging pump ship sedimentary laden, including algae and plankton stacked on the bottom of a lake, reservoir, fish farm, etc. without contaminating water and An object of the present invention is to provide a method and a system for treating sedimentation for water purification of reservoirs.

In addition, the present invention is sedimentary sewage dredged from the bottom of lakes, reservoirs, fish farms, etc. by flocculation and flocculation sedimentation by solidifying and solid-liquid separation and separated supernatant water containing color, odor, taste, pathogenic microorganisms ozone Provides a sedimentation treatment method and system for water purification of lakes and reservoirs where the solids treated and returned to lakes or reservoirs are dehydrated by geosynthetic sacks, fermented, and recycled as compost or soil improvers. It aims to do it.

In addition, the present invention mechanically mixes, circulates, and abandons the water in an identity body such as a lake, a reservoir, or a fish farm to prevent recontamination in advance, thereby improving the value of a water source, industrial or agricultural agricultural water, and a lake and reservoir. It is an object of the present invention to provide a method and a system for the treatment of sewage sludge for water purification.

1 is a schematic diagram showing a sedimentation treatment system for water purification of lakes and reservoirs according to the present invention.

FIG. 2 is a schematic diagram showing a dredging pump ship in FIG.

3 is a schematic diagram showing a bar-screen in FIG.

4 is a schematic view showing the rapid mixing tank in FIG.

FIG. 5 is a schematic view showing a solid-liquid separation tank for flocculation and sedimentation in FIG.

6A and 6B are schematic views showing the dehydration equipment in FIG.

FIG. 7 is a schematic diagram showing the solid cake fermenter in FIG. 1. FIG.

FIG. 8 is a schematic diagram showing the ozone purification equipment of FIG.

Figure 9 is a schematic diagram of the process of circulating the mixed circulation aeration device and the water according to the present invention.

※ Explanation of code about main part of drawing ※

1: Dredge Pump Ship 2: Suction Pump

3,4,20: Delivery pipe 5: Panel

6: arm 7: bucket wheel cutter head

8: booster pump 9: spud

10: bar-screen 11: screen

12 inlet port 13 outlet port

14 screen channel 15 slurry pump

16 flow meter 17 control unit

18,40: valve 19: ball valve

21: rapid mixing tank 22: flocculant feeder

23: flocculant 24,30: motor

25,55: Stirrer 28: Outlet

32, 33, 34, 35: porous membrane 26, 27, 36: diaphragm

29: solid-liquid separation tank 31: impeller

37: solids transfer pump 38, 39: drain

41: sight window 42: coagulation tank

43: sedimentation solids storage section 44: sedimentation solids liquid separation tank

45: supernatant outflow 46: dewatering equipment

47,49: Geosynthetic sack 48,50: Vinyl

51a, 51b: pressure outlet 52: solid cake fermenter

53 fermentation tank 53a: double jacket

54: inlet 56: air floor

57: filter 58: outlet

59: air heater 60: ozone purification equipment

61: contact reactor 62: water pump

63: air compressor 64: air filter

65: ozone generator 66: inverter

67: air dryer 68: mixing circulation aeration device

70a: buoyancy device 70b: agitator

The sedimentation treatment method for water purification of lakes and reservoirs according to the present invention for achieving the object as described above, the pumping action of the suction pump mounted on the dredging pump ship to the lake or reservoir, the bottom of the fish pond A first step of delivering the bar-screen to the ground through a delivery pipe; and a second step of filtering and removing impurities such as leaves, plastics, wood chips, and rags included in the delivered deposition stack using the bar-screen. And a third step of adding a flocculant to the sedimentation strip from which the contaminants have been removed, and stirring at 150 to 250 rpm for 30 to 90 seconds to rapidly coagulate fine organic, inorganic and contaminants to form a fine floc, and the fine floc The fourth step of doubling the volume of the floc by stirring again to 50 ~ 70 rpm and stagnant for a predetermined time including a through-hole in the deposition juncture containing the flocs A fifth step of sedimenting the flocs by using the plurality of formed porous diaphragms and the non-perforated diaphragm and the inclined bottom surface in the solid-liquid separation tank to form sedimented solids, and separating and discharging the clear water of the supernatant water. It is characterized by.

In the sedimentation treatment method for water quality purification of lakes and reservoirs according to the present invention, it is appropriate that the flocculant is added at 300 to 400 g per 1 ton of sedimentary Journey flowing into the rapid mixing tank.

In the sedimentation treatment method for purifying water quality of lakes and reservoirs according to the present invention, it is preferable to further include dehydrating water contained in the solid separated from the sedimentation tank to 70%.

In the sedimentation treatment method for water quality purification of lakes and reservoirs according to the present invention, the dehydrated solid cake is recycled as a compost and soil improver using microorganisms contained in the dehydrated cake while heating and stirring to 50 to 60 ° C. It is preferred to further include the step of fermentation if possible.

In the sedimentation treatment method for water quality purification of lakes and reservoirs according to the present invention, in order to remove the smell, taste, pathogenic microorganisms, etc. contained in the clear water of the supernatant of the supernatant in the fifth step and dehydration step It is preferred to further comprise the step of ozonating the clear water.

The sedimentation treatment system for water purification of lakes and reservoirs according to the present invention includes a suction pump for forcibly delivering water to the ground by dredging the sedimentation tanks of lakes, reservoirs, and fish farms. A suction pipe extending to the bottom of the reservoir and the fish farm is connected, and a dredging pump ship connected with a delivery pipe extending to the bar-screen of the ground is connected to the discharge port of the suction pump, and a plurality of bars installed at predetermined intervals. Bar-screen to filter and remove the contaminants, such as leaves, plastic, wood chips, mop, and the like contained in the sedimentation through the delivery pipe by a screen consisting of, and a stirrer for stirring the sedimentation in which the debris is removed Is installed to be centrally coupled to the motor, and a coagulant for injecting a coagulant at the upper end of the predetermined distance An inner space having a rapid mixing tank having an indentation and an inclined bottom surface is partitioned into a coagulation flocculation tank, a solids storage part, a settling solid-liquid separation tank, and a supernatant water outlet by a plurality of porous diaphragms and diaphragms. The tank is provided with an impeller for agitating the deposition plunger including the microflux flowing from the rapid mixing tank, and a drain for discharging the clear water of the solids and the supernatant is connected to the bottom surface of the solids reservoir and the upper portion of the supernatant outlet. Characterized in that it comprises a solid-liquid separation tank.

In the sedimentation treatment system for water quality purification of lakes and reservoirs according to the present invention, the stirrer is preferably configured to stir the sedimentation jersey for 30 to 90 seconds at a rotational speed of 150 to 250 rpm.

In the sewage stacking treatment system for water quality purification of lakes and reservoirs according to the present invention, a valve is installed at an outlet of the coagulant injector, and the valve is a control unit that detects the amount of the sedimentary plunger flowing into the rapid mixing tank by a flow meter. It is preferable to add 300-400 g of flocculant per ton of the depositing journal automatically by opening and closing.

In the sedimentation treatment system for water quality purification of lakes and reservoirs according to the present invention, a diaphragm is installed at the inlet side of the rapid mixing tank so that the water flows from the bottom to the top, and on the outlet side, It is preferable that the diaphragm without a through hole is provided so as to partition to the position which becomes 2/3 of a lower end.

In the sedimentation processing system for water quality purification of lakes and reservoirs according to the present invention, the porous diaphragm is installed higher than the height of the sedimentation stored in the portion close to the bottom surface of the solid-liquid separation tank, the diaphragm is solid In the bottom of the separation tank, it is preferable that the deposition jerk is installed lower than the stored height.

In the sedimentation treatment system for water quality purification of lakes and reservoirs according to the present invention, it is preferable that a solids transfer pump for forcibly discharging solids is installed at a drain connected to the solids storage unit.

In the sedimentation treatment system for water quality purification of lakes and reservoirs according to the present invention, it is preferable that a dehydration facility is further provided for dewatering water contained in the solid discharged from the solid-liquid separation tank to 70% or less.

In the sedimentation treatment system for water quality purification of lakes and reservoirs according to the present invention, the dewatering facility is a bag or tube-shaped geotextile bag, and the bottom of the bag is bag or tube type. In order to collect the drained and dewatered water from the sack, it is preferable that the vinyl of the material which is not permeable is laid.

In the sedimentation processing system for water purification of lakes and reservoirs according to the present invention, the material of the geotextile bag is one selected from the group of geotextiles of PP (polypropylene), PE (polyethylene), and PET (polyester). It is preferable.

In the sedimentation treatment system for water quality purification of lakes and reservoirs according to the present invention, at least one agitator for agitating the solid cake at 3 to 5 rpm in a double jacketed fermenter with a thermal insulation function of 55 to 60 ° C. The bottom of the fermentation tank is equipped with an air heater and an air blower for heating and supplying air for the growth of fermentation microorganisms, and the top of the fermentation tank to filter harmful gases generated when fermentation of solids A filter for discharging is mounted, and the side of the fermentation tank is provided with an opening for discharging the finished solids to open and close, and further includes a solid cake fermenter for fermenting the solid cake with a recyclable compost and soil improver. It is desirable to be.

In the sedimentation treatment system for water purification of lakes and reservoirs according to the present invention, ozone generated in an ozone generator is supplied to a contact reactor into which the clear water of the supernatant flows, and the smell and taste contained in the clear water of the supernatant water. It is preferable that the ozone purification equipment for removing pathogenic microorganisms is further provided.

In the sedimentation treatment system for water quality purification of lakes and reservoirs according to the present invention, a buoyant device floating on the surface of a lake or reservoir and fish farm water purged dredging and water quality is immersed in the water to generate a wave, It is further equipped with a mixed circulation aeration device (also called a 'wave generator') that forcibly mixes the water at the bottom with the water at the surface of the water and circulates the air so that air is delivered to the water at the bottom of the lake, reservoir and fish farm. It is preferable.

Hereinafter, the present invention will be described in detail.

FIG. 2 shows a dredging pump ship for dredging the sedimentary silos accumulated on the bottom of a lake, reservoir, fish farm, etc. in FIG. 1, and a dredging pump ship 1 equipped with a buoyancy device that can float at a depth of 70 m or more is deposited. A suction pump 2 is installed to suck the jersey and deliver it to the bar-screen 10 on the ground through the delivery pipes 3 and 4. A delivery pipe for sucking the sedimentary juncture by combining the delivery pipe 3 immersed in the front end of the suction pump 2, that is, the bottom of a lake or reservoir and fish farm, with the arm 6 mounted on the dredging pump ship 1. The position of (3) can be moved arbitrarily. In particular, a bucket wheel cutter head (7) is mounted at the end of the arm (3) corresponding to the end of the delivery pipe (3), so that the sedimentary bottoms accumulated on the bottom of the lake, reservoir and fish farm are also sucked up. can do.

In addition, the delivery pipe 4 connecting the suction pump 2 mounted on the dredging pump ship 1 and the bar-screen 10 on the ground has a diameter of 20 cm and a length of 10 m, Consists of a combination of the delivery pipe, it is fixed to a plurality of panels 5 with buoyancy such as styropole so as not to sink in water, easy disassembly and assembly. In addition, by installing a separate booster pump (8) in the middle of the delivery pipe (4) it is possible to extend the delivery distance of the deposition jerk up to twice.

In addition, the dredging pump ship 1 is fixed by a plurality of spuds 9 operated by the control lever, and the dredging pump ship 1 is movable to the land by a separate dedicated trailer.

Preferably, dredging operation may be carried out more efficiently by using special equipment to remove large foreign substances such as waste tires, waste bicycles, waste appliances, and large stones, which hinder the dredging of the sedimentary silos.

Dredging pump ship (1) equipped with all these functions (1), ship length 7,7m (including buoyancy tank), hull width 5.0 m (including buoyancy tank), hull height 2.2 m, engine 250 hp turbo x 2,500 rpm, suction pump maximum It has specifications such as a discharge amount of 342 m 3 / h, a pump barrel with a maximum diameter of 20 cm, a pump suction discharge diameter of 20 cm, and a total weight of 7.4 tons. The dredging pump ship 1 having such a specification can dredge 70-120 m <3> per hour, without disturbing the sedimentary yard accumulated at the bottom of a lake, a reservoir, and a fish farm.

3 shows the bar-screen 10 in FIG. 1, in which a suction port 12 connected to the delivery pipe 4 is formed in the front and a delivery pipe 20 connected to the rapid mixing tank 21 in the rear. In the middle of the connected screen channel 14, a coarse screen 11 is formed inclined by a plurality of bars having a distance of 20 to 30 mm. Of course, it is preferable that the inclination direction of the screen 11 corresponds to the direction in which the water including the deposition journal flows.

Accordingly, small debris such as leaves, plastics, wood chips, and rags contained in the sedimentary silos delivered from the dredging pump ship 1 to the ground at a flow rate of 1 to 3 m / sec through the delivery pipe 4 are screened ( 11) is filtered by. By removing the small contaminants caught on the screen 11 from time to time by using separate equipment, it is possible to continuously maintain the filtering function of the bar-screen 10 to prevent the various pumps of the rear end from being blocked or broken.

At this time, by installing a separate ball valve 29 in the delivery pipe 20 can be adjusted the amount or speed of the deposition juncture flowing into the rapid mixing tank 21. In addition, due to the weight of the sedimentary storage, the sedimentary storage may be delivered through the delivery pipe 20, and a separate slurry pump 15 may be installed in the delivery pipe 20 to force delivery.

FIG. 4 shows the rapid mixing tank 21 in FIG. 1, with a diaphragm at the inlet and outlet sides of the rectangular rapid mixing tank 21 to which the deposit loggers from which the debris is removed from the bar-screen 10 are delivered. (26) (27) are provided, respectively. In particular, the diaphragm 26 is installed so as to come from the upper end of the rapid mixing tank 21 to the portion close to the bottom, so that the deposition juncture introduced through the delivery pipe 20 is sequentially separated by the rapid mixing tank 21. While passing through the bottom of the membrane plate 26 and moving to the center, the fine organic, inorganic and contaminants are condensed and aggregated to form a fine floc. In addition, the diaphragm 27 on the outlet side is provided so as to partition only the lower end of the rapid mixing tank 21, so that the finely aggregated floc is naturally discharged through the outlet 28.

In addition, a stirrer 25 connected to the motor 24 is installed at the center of the rapid mixing tank 21 so as to stir the deposition jersey for a predetermined time (30 to 90 seconds) at 150 to 250 rpm. A coagulant injector 22 for injecting a coagulant 23 (an example of a coagulant may be 'OK-floc') is provided at an upper end of the predetermined distance from 21. A separate valve 18 is provided at the outlet of the coagulant injector 22 so that the amount of coagulant introduced into the rapid mixing tank 21 can be adjusted. 20) is automatically opened and closed by the control of the control unit 17 that senses the amount of the depositing Journey flowing to the 300 to 400g of coagulant per 1 ton (toning).

5 shows a solid-liquid separation tank 29 for agglomeration and sedimentation of the sediment stack in FIG. 1, and the bottom section of the solid-liquid separation tank 29 is left and right centered on the settled solids storage part 43 as shown in the drawing. It is formed to be inclined to the inside, the condensation coagulation tank 42 and the settled solids by a plurality of porous diaphragm plate 32, 33, 34, 35 and the diaphragm plate 36 is not formed through the inside It is partitioned into the storage part 43, the sedimentation solid-liquid separation tank 44, the supernatant outflow part 45, etc.

At this time, the porous diaphragm plates 32, 33, 34, 35 are installed higher than the stored height of the deposition jerk in the portion close to the bottom surface of the solid-liquid separation tank 29, the diaphragm 36 is solid-liquid separation tank At the bottom of (29), it is preferable that the deposition jerk is installed lower than the stored height. That is, the solids through the purification process sinks down by the porous diaphragms 32, 33, 34, 35 and the diaphragm 36, and the separated water is drained from the upper portion through the diaphragm 36. It is to be overflowed to (39).

An impeller 31 interlocked with the motor 30 is installed in the coagulation flocculation tank 42 in which the coagulation agent is mixed, and the solids transfer pump 37 is provided at the bottom of the settling solid storage part 43. The hypothesized drain 38 is connected, and the solid-liquid separation tank 29 corresponding to the settling solid storage unit 43 is provided with a see-through window 41 for checking the amount of solids stored in the settling solid storage unit 43. It is. In addition, a drain 39 for discharging the supernatant separated from the sedimentation solids separation tank is connected to the upper portion of the supernatant outlet 45, and a valve 40 for controlling the discharge of the supernatant is installed on the drain 39. It is.

As a result, the deposition plunger in which fine flocks are formed by mixing with the coagulant is stirred again by the impeller 31 rotating at 50 to 70 rpm in the coagulation flocculation tank 42 to increase the flocks included in the deposition plunger. The agitated sedimentary sluice is formed in the condensation agglomeration tank 42, the solids storage part 43, and the sedimentation solid-liquid separation tank 44 while the flocculated flocs are largely agglomerated in the porous diaphragm plates 32 and 33 ( 34) (35) no longer flows and settles down rapidly. The settled flocks, that is, the settled solids are moved to the lower side along the bottom surface of the inclined solid-liquid separation tank 29 to be collected in the settled solids storage part 43. On the other hand, the clear water of the supernatant separated from the liquid-liquid is passed over the diaphragm 36 through the condensation coagulation tank 42, the solids storage unit 43, the sedimentation solid-liquid separation tank 44, etc. consisting of a single facility, the supernatant outflow portion 45 Will flow).

The sedimented solid accumulated in the solid storage unit 43 is pressurized and introduced into the dehydration facility 46 in a state containing 99% of moisture through the drain 38 according to the pumping action of the solid transfer pump 37. You will be dehydrated to less than 70%.

The dehydration facility 46 for reducing moisture for the final treatment of a large amount of concentrated sediment solids is a bag-shaped geotextile bag 47 or a tube-shaped geosynthetic filament. It may have a bag 49. As a material of the geotextile bag (47) (49), PP. PE. One can be used in the PET fiber group. Preferably, it is possible to easily take out the dehydrated solid cake by attaching a zipper that is easy to open and close on the geotextile sack (47) (49).

In addition, at the bottom of the geotextile sack (47) (49), which is able to tie the inlet side to the delivery pipe (38), the water for collecting the clear water of the supernatant separated from the solids and circulating the lake, reservoir, fish farm, etc. Vinyl 48, 50, etc. of the material which has not permeated are laid.

In particular, the tubular geosynthetic sack 49 as shown in Figure 6b has a pressure discharge port (51a, 51b) for discharging the pressure generated by the solid material that is suddenly introduced into the length or length of the geosynthetic sack 49 The number corresponding to is formed.

An example of a bag-shaped geotextile bag 47 as shown in FIG. 6A is a shape similar to a conventional sandbag, and has a capacity of 1 to 5 m 3 of concentrated solids that can be injected therein. An example of the tubular geotextile hemp 49 as shown in Fig. 6B can have an outer diameter of 1 to 3 m and a length of 5 to 50 m.

In the dehydration equipment 46 as shown in FIGS. 6A and 6B, the dehydrated solid cake is organic and has a water content of 70% or less, which is uneconomical for landfilling. Therefore, the solid cake is fermented by the solid cake fermenter 52 of FIG. Recycling can not only provide economic benefits, but also prevent water pollution and soil pollution.

One example of a solid cake fermenter 52 for fermenting a solid cake using natural microorganisms present in the dehydrated solids is a double jacket 53a having a thermal insulation function of 55 to 60 ° C., as shown in FIG. In the fermentation tank 53 of the at least one stirrer 55 for stirring the solid cake introduced through the inlet 54 at 3 to 5 rpm is mounted to interlock with the drive motor. In addition, the bottom of the fermentation tank 53 is equipped with an air heater 59 and an air blower 56 for heating and supplying air at a constant temperature for propagation of fermentation microorganisms, so that the solid cake is fermented smoothly. You can.

And the upper end of the fermentation tank 53, that is, the lid is equipped with a filter 57 for filtering and discharging the gas generated when stirring the solids, the outlet of the fermentation tank 53 for taking out the finished solids (58) is provided to open and close.

When the solid cake fermenter is fermented for 24 to 48 hours by the solid cake fermenter 52, the solid is converted into a powder having a water content of 40% or less.

FIG. 8 is an ozone purification apparatus for ozone treating the clear water of the supernatant water separated from the solids in the solid-liquid separation tank 29 or the dehydration facility 46, and contacting the contact reactor 61 by a water pump 62 (water pump). The ozone generator 65 for mixing ozone with the clear water of the supernatant water supplied to the contact reaction tank 61 is connected to the delivery pipe through which the clear water of the supernatant water is supplied.

The above ozone generation is when the air in the air flows into the air compressor (63), the compressed air is purged of impurities by the air filter 64, and the purified air flows into the ozone generator (65) through the air dryer (67) do. The introduced air is electrochemically ozone generated by a constant voltage or frequency supplied from the inverter 66. The generated ozone flows into the contact reaction tank 61 together with the incoming supernatant.

In particular, a separate micro bubble generator (UMB: Ulra Micro-Bubbles) is attached to an inlet side of the contact reactor 61 into which supernatant water and ozone flow, thereby activating a reaction in the contact reactor 61. In addition, the upper part of the contact reactor 61 is equipped with an exhaust ozone decomposing device that uses activated carbon as a main component and decomposes the ozone that has been reacted, and thus can directly prevent ozone from being released into the atmosphere.

Accordingly, the clear water of the supernatant water stored in the contact reaction tank 61 may be sterilized by ozone to oxidize and remove the dark color, smell, taste, pathogenic microorganisms, residual trace substances, and the like contained in the water.

9 shows a mixed circulation aeration device 68 (also referred to as a 'wave generator') that floats on the surface of a lake, reservoir, or fish farm, and is a buoyancy device floating on the surface of a lake, reservoir, or fish farm. Equipped with an agitator 70b which can be locked below the surface of the water to 70a, the water and the surface of the bottom of the lake, reservoir, fish farm, etc. are forcibly mixed and circulated to give up to the deep air in the atmosphere. This ensures that recontamination of lakes, reservoirs and fish farms can be prevented.

Therefore, according to the present invention, by using a powerful suction pump mounted on a dredger ship, it is possible to dredge the sedimentary sills including algae and plankton accumulated on the bottom of a lake, reservoir, fish farm, etc. without contaminating the water body.

In addition, the present invention is to separate the sedimentary yard dredged from the bottom of the lake, reservoir, fish farm, etc. into dredging sites using mechanical and chemical methods at high speed to separate the water and solids, color, smell, taste, When pathogenic microorganisms are contained, they are oxidized with ozone and returned to lakes or reservoirs, and the separated solids are dehydrated and fermented at work sites and recycled as compost or soil modifiers. After quasi-setting, in order to prevent pollution again, the water of lakes, reservoirs, fish farms, etc. can be mechanically mixed and recycled to replace the identity of the water with a circular type of water to secure a large amount of water, industrial and agricultural water.

The present invention prevents secondary pollution of lakes, reservoirs, fish farms, etc. by mixing, circulating, and abandoning water such as lakes, reservoirs, and fish farms, and provides a large amount of high-quality water that can be used for drinking water, industrial and agricultural water at low cost. It can be secured.

Although the present invention has been described in detail only with respect to the specific embodiments described, it will be apparent to those skilled in the art that various modifications and variations are possible within the spirit of the present invention, and such modifications and modifications belong to the appended claims. .

Claims (14)

A first step of pumping a strong suction pump mounted on a dredging pump ship and spreading a deposition logger at the bottom of a lake, a reservoir, or a fish farm to a bar-screen on the ground through a delivery pipe; A second step of filtering and removing the contaminants such as leaves, plastic, wood chips, and rags included in the delivered deposition stack using a bar-screen; Adding a flocculant to the dredged sedimentary sills from which the contaminants have been removed and stirring for 30 to 90 seconds at 150 to 250 rpm to rapidly coagulate fine organic, inorganic and contaminants to form a fine floc; A fourth step of doubling the volume of the floc by stirring the deposition jour including the fine floc again at 50 to 70 rpm and standing for a predetermined time; And Sedimentation solids are formed by sedimenting the flocs by using a plurality of porous diaphragms formed with pores in the sedimentary Journey including the flocs, the diaphragm having no pores formed thereon, and the inclined bottom surface in the solid-liquid separation tank, and making clear water of the supernatant water. A fifth step of separating and discharging; Sedimentary treatment method for water purification of lakes and reservoirs comprising a. The method of claim 1, And a dewatering facility step for dewatering water contained in the solid separated from the sedimentary lager to 70% or less at a dredging work site. The method according to claim 1 or 2, Comprising the step of heating the dehydrated solid cake to 50 ~ 60 ℃ and using a natural microorganism contained in the dehydrated cake while stirring to allow for recycling to a compost and soil improver in the solid-liquid separation operation site Sedimentation treatment method for the purification of water quality of the lake and reservoir. The method according to claim 1 or 2, And further comprising the step of oxidizing the clear water of the supernatant water in the fifth step and dehydration step with ozone to remove odors, taste, pathogenic microorganisms, etc. contained in the clear water of the supernatant water and ozone Sedimentation treatment method for water purification of reservoir. A suction pump for dredging the sedimentary loggers of a lake, a reservoir and a fish farm is delivered to the ground, and a suction pipe connected to the suction port of the suction pump extends to the bottom of a lake, a reservoir and a fish farm, and a discharge port of the suction pump is connected to the ground. Dredging pump ship connected to the delivery pipe extending to the bar-screen of; A bar-screen for filtering and removing impurities such as leaves, plastics, wood chips, and rags included in the deposition lattice through the delivery pipe by a screen including a plurality of bars installed at predetermined intervals; A rapid mixing tank in which a stirrer for stirring the sediment journa from which the contaminants have been removed is installed to be centrally coupled to a motor, and a coagulant injector for injecting a coagulant is installed at an upper end of the predetermined distance; And An internal space having an inclined bottom surface is divided into a coagulation flocculation tank, a solids storage part, a settling solid-liquid separation tank, and an outflow part by a plurality of porous diaphragms and a diaphragm, and the flocculation tank has a fine floc flowing from the rapid mixing tank. A reducer for agitating the deposition juncture including a solid-liquid separation tank having a drain connected to the bottom surface of the solids storage unit and an upper end of the supernatant outlet, for discharging the clear water of the solids and the supernatant; Sedimentary treatment system for water purification of lakes and reservoirs comprising a. The method of claim 5, Wherein said stirrer is configured to stir the deposition jersey for 30 to 90 seconds at a rotational speed of 150 to 250 rpm. The method of claim 5, A valve is installed at the outlet of the coagulant injector, and the valve is automatically opened and closed by the control of a control unit that detects the amount of the deposition tank flowing into the rapid mixing tank by a flow meter, so that 300 to 400 g per ton Sedimentation treatment system for water purification of the lake and reservoir, characterized in that a flocculant is added. The method of claim 5, The porous diaphragm plate is installed higher than the height stored in the deposition juncture near the bottom surface of the solid-liquid separation tank, the diaphragm plate is installed lower than the height stored in the bottom of the solid-liquid separation tank Sedimentation treatment system for water purification of the lake and reservoir. The method of claim 5, And a drainage transfer pump for forcibly discharging the solids in a drain connected to the solids storage unit. The method of claim 5, A bag or tube-shaped geosynthetic bag, and the bottom of the bag is dehydrated with vinyl that is not permeable to collect water drained and dehydrated from the bag or tube bag. Sedimentation treatment system for water purification of the lake and reservoir, characterized in that the facility is further provided. The method of claim 10, The geosynthetic fiber bag is made of PP (polypropylene), PE (polyethylene), PET (polyester) material sedimentary treatment system for water purification of the lake and reservoir, characterized in that one selected from the group of geotextiles. The method of claim 5, A double jacketed fermentation tank with a thermal insulation function of 55 to 60 ° C. is equipped with one or more stirrers for stirring the solid cake at 3 to 5 rpm, and the bottom of the fermentation tank is heated and supplied with air for propagation of fermentation microorganisms. An air heater and an air blower are mounted to the upper side of the fermenter, and a filter for filtering and discharging harmful gases generated when fermenting the solid is mounted. The outlet for discharging the sewage treatment system for purifying the water quality of the lake and reservoir, characterized in that it further comprises a solid cake fermenter for fermenting the solid cake with a recyclable compost and soil improver is installed to open and close. The method of claim 5, The ozone generated in the ozone generator is supplied to the contact reaction tank into which the clear water of the supernatant is introduced, and the ozone purification equipment for removing odor, taste, pathogenic microorganisms, etc. contained in the clear water of the supernatant is further provided. Sedimentation treatment system for water purification of lakes and reservoirs. The method of claim 5, A buoyant device floating on the surface of dredged and water-purified lakes or reservoirs and fish farms is equipped with a stirrer that is immersed in water to generate waves, forcibly mixing the water at the bottom and the water at the surface. B. The sewage treatment system for water purification of the lakes and reservoirs, further comprising a mixed circulation aeration device for delivering water to the bottom of the reservoir and the fish farm.