KR100457383B1 - Accumulation matter processing method and system for water purification of lake and reservoir - Google Patents

Abstract

The present invention relates to a sediment treatment method and system for the water purification of lakes and reservoirs and fish farms, and mechanically and chemically And solids are separated, and the water containing the color, smell, taste, and pathogenic microorganisms of the treated water is ozonated and returned to the lake or reservoir. The separated solids are dehydrated and fermented so that they can be recycled as compost or soil improver. After dredging and purification, the identity area is converted into a circulating water to prevent contamination of lakes, reservoirs and fish farms. It can enhance its value as a water source, industrial and agricultural agricultural water.

Description

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

The present invention relates to a sediment treatment method and system for water purification of lakes and reservoirs, and more particularly, to dredge sediment, including algae, plankton, and contaminants accumulated on the bottom of the lake or reservoir to the ground without disturbing water and Sediment treatment method for water purification of lakes and reservoirs that separates the solids and ozonates the purified water and returns it to the lake or reservoir, and the sedimented solids are dehydrated and fermented to be recycled as compost or soil modifiers. It's about the system.

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.

The contaminated lake or reservoir water is dredged and purified from the bottom of the lake or reservoir so that it can be used as a water source, agricultural or industrial water. There are two ways to do this.

The first method is to remove all the water from the lake or reservoir, remove the sediment with an excavator, etc., and then transport the new water to store the 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 into the lake or reservoir bottom does not remove any thick sediment that has settled on the lake or reservoir bottom, and because the water is not completely purified, the color and turbidity are still high. Of course, the work time is longer.

The present invention for overcoming the conventional problems lakes and reservoirs that can be dredged by the dredging pump ship to the ground to deliver sediment, including algae and plankton stacked on the bottom of a lake, reservoir, fish farm, etc. without contaminating water To provide a sediment treatment method and system for water purification.

In addition, the present invention is sediment deposited from the bottom of the lake, reservoir, fish farm, etc. using a flocculant to rapidly settle the flocculation to solid-liquid separation, the water containing the color, odor, taste, pathogenic microorganisms in the separated supernatant is ozone treatment To provide sediment treatment methods and systems for water purification of lakes and reservoirs, which are returned to lakes or reservoirs, and the separated solids are dehydrated by geosynthetic sacks and fermented to be recycled as compost or soil improvers. The purpose.

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. To provide a sediment treatment method and system for water purification.

1 is a schematic diagram showing a sediment 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

Sediment 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 spread the sediment of the lake, reservoir, fish farm bottom A first step of delivering the bar-screen to the ground through a pipe; and a second step of filtering and removing impurities such as leaves, plastic, wood chips, and rags included in the delivered sediment using the bar-screen; A third step of adding a flocculant to the sediment from which the contaminants have been removed and stirring for 30 to 90 seconds at 150 to 250 rpm to rapidly agglomerate fine organic, inorganic and contaminants to form a fine floc, and a deposit including the fine floc And a fourth step of doubling the volume of the floc by stirring again at 50 to 70 rpm and stagnating for a predetermined time and a plurality of holes formed in the deposit containing the flocs. And a fifth step of sedimenting the floccules by making the settling solids by using the two porous diaphragms, the diaphragm having no openings, and the inclined bottom surface in the solid-liquid separation tank, and separating and discharging the clear water of the supernatant. It is done.

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

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

In the sediment treatment method for water purification of lakes and reservoirs according to the present invention, the dehydrated solid cake can be recycled as a compost and soil improver by using microorganisms contained in the dehydrated cake while heating and stirring to 50 to 60 ℃. It is preferable to further include the step of fermentation.

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

Sediment treatment system for water purification of lakes and reservoirs according to the present invention, the suction pump for forcibly delivering to the ground by dredging the sediment of the lake, reservoir and fish farm, and the suction port of the suction pump and the lake or reservoir and A suction pipe extending to the bottom of the fish farm is connected, and the discharge port of the suction pump is composed of a dredging pump ship connected with a delivery pipe extending to a bar-screen on the ground, and a plurality of bars installed at predetermined intervals. A bar-screen for filtering and removing impurities such as leaves, plastics, wood chips, and rags contained in the sediment through the delivery pipe by a screen, and a stirrer for stirring the sediment from which the impurities have been removed. Installed at the center, and a coagulant injector for injecting a coagulant at the upper end of the predetermined distance The inner space having a rapid mixing tank and an inclined bottom surface is partitioned into a coagulation flocculation tank, a solids storage portion, a settling solid-liquid separation tank and a supernatant water outlet by a plurality of porous diaphragms and diaphragms. An impeller for agitating the sediment containing the fine flocks flowing from the rapid mixing tank is installed, and the solid solution is connected to the bottom surface of the solids storage portion and the upper end of the supernatant outflow portion is connected to a drain for discharging clear water of the solids and the supernatant water. Characterized in that it comprises a separation tank.

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

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

In the sediment treatment system for water quality purification of lakes and reservoirs according to the present invention, the inlet side of the rapid mixing tank is provided with a diaphragm so as to come from the bottom to the top spaced apart by the width of the water flow, through the outlet side through It is preferable that it is provided so that the diaphragm plate which is not formed may be partitioned to the position which becomes 2/3 of a lower end.

In the sediment treatment system for water quality purification of lakes and reservoirs according to the present invention, the porous diaphragm is installed higher than the storage height of the sediment in the portion close to the bottom surface of the solid-liquid separation tank, the diaphragm is a solid-liquid separation tank It is preferable that the sediment be installed at a bottom lower than the stored height.

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

In the sediment treatment system for water quality purification of lakes and reservoirs according to the present invention, the dewatering equipment is a bag or tube-shaped geotextile bag, and the bottom of the bag is a bag or tubular bag. It is preferable that the vinyl is made of a material that does not permeate the water to collect the drained and dehydrated water from the bag.

In the sediment treatment system for water purification of lakes and reservoirs according to the present invention, the material of the geotextile hemp is one selected from the group of geotextiles made of PP (polypropylene), PE (polyethylene), PET (polyester) material desirable.

In the sediment treatment system for water purification of lakes and reservoirs according to the present invention, a double jacketed fermenter with a thermal insulation function of 55 to 60 ° C. is equipped with at least one stirrer for stirring the solid cake at 3 to 5 rpm. The bottom of the fermenter is equipped with an air heater and an air blower for heating and supplying air for propagation of fermentation microorganisms, and filtering the harmful gas generated when fermenting the solids at the top of the fermenter. A filter for discharging is mounted, and a side surface of the fermentation tank is provided with openings for discharging the solids that have been fermented to be opened and closed, and further includes a solid cake fermenter for fermenting the solid cake with a recyclable compost and soil improver. It is preferable.

In the sediment treatment system for water quality purification of lakes and reservoirs according to the present invention, the ozone generated in the ozone generator is supplied to the contact reaction tank into which the clear water of the supernatant flows, so that the smell, taste, It is preferable to further provide an ozone purification apparatus for removing pathogenic microorganisms.

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

Hereinafter, the present invention will be described in detail.

Figure 2 shows a dredging pump ship for dredging the sediment accumulated on the bottom of the lake, reservoir, fish farm, etc. in Figure 1, the dredging pump ship (1) equipped with a buoyancy device that can float at a depth of 70m or more A suction pump 2 for suctioning and delivering the bar-screen 10 on the ground through the delivery pipes 3 and 4 is mounted. A delivery pipe for suctioning sediment by combining the delivery pipe 3 submerged in the front 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 even sediment accumulated on the bottom of a lake or reservoir and fish farm can be sucked in. Can be.

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 deposit 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 interfere with the dredging of sediments in advance.

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 specifications can dredge 70-120 m 3 per hour without disturbing the sediment accumulated in 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, the inclination direction of the screen 11 preferably coincides with the direction in which the water including the deposit flows.

Accordingly, small debris such as leaves, plastic, wood chips, and rags contained in the sediment delivered to the ground at a flow rate of 1 to 3 m / sec from the dredging pump ship 1 through the delivery pipe 4 is 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 19 in the delivery pipe 20 can adjust the amount or speed of the sediment flowing into the rapid mixing tank 21. In addition, the sediment may be delivered through the delivery pipe 20 by the weight of the deposit, 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 the diaphragm 26 at the inlet and outlet sides of the rectangular rapid mixing tank 21 to which deposits from which the contaminants have been removed from the bar-screen 10 are delivered. (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 a portion close to the bottom, so that the sediment introduced through the delivery pipe 20 sequentially forms the diaphragm of the rapid mixing tank 21 ( 26) As it passes through the bottom and is moved to the center, the fine organic, inorganic and contaminants condense 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 that the deposit can be stirred at a predetermined time (30 to 90 seconds) at 150 to 250 rpm. At the upper end of the predetermined distance 21, a coagulant injector 22 for injecting a coagulant 23 (an example of the coagulant may be 'OK-floc') is installed. 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. It is automatically opened and closed by the control of the control unit 17 that senses the amount of the sediment flowing in 20) is configured to be able to inject a coagulant of 300 to 400 g per ton of sediment.

FIG. 5 shows a solid-liquid separation tank 29 for agglomeration and sedimentation of the deposits in FIG. 1, and the bottom cross section of the solid-liquid separation tank 29 is left and right about the settled solids storage part 43 as shown in the drawing. It is formed to be inclined, and the inside of the condensation coagulation tank 42 and the settling solids storage by a plurality of porous diaphragm plate 32, 33, 34, 35 and the diaphragm plate 36 is not formed through the hole It is partitioned into the 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 height in which deposits are stored in the portion close to the bottom surface of the solid-liquid separation tank 29, and the diaphragm 36 is the solid-liquid separation tank 29 It is preferable that the sediment at the bottom of the bottom be installed below 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 into which the sediment mixed with the coagulant flows, and a solids transfer pump 37 is installed at the bottom of the sedimented solid storage part 43. The drain 38 is connected, and the solid-liquid separation tank 29 corresponding to the settled solids storage 43 is provided with a see-through window 41 for checking the amount of solids stored in the settled solids storage 43. . 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 deposit in which the fine flocks are formed by mixing with the flocculant is stirred again by the impeller 31 rotating at 50 to 70 rpm in the flocculation flocculation tank 42, thereby increasing the flocks included in the deposit. The agitated sediment is concentrated in the condensation agglomeration tank 42, the solids storage part 43, and the sedimentation solid-liquid separation tank 44 for 4 to 6 minutes. The flocculated flocs are porous diaphragms 32, 33, and 34. By 35, no more flow and settle 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, sediment containing algae and plankton accumulated on the bottom of a lake, reservoir, fish farm, etc. can be dredged to the ground without contaminating the water body by the powerful suction pump mounted on the dredger ship.

In addition, the present invention separates the sediment dredged to the ground from the bottom of the lake, reservoir, fish farm, etc. into the water and solids at high speed by using mechanical and chemical methods in the dredging site, color, smell, taste, pathogenicity in the separated supernatant When 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 improvers, drastically reducing the cost and time for dredging. In order to prevent pollution again after purification, the water of lakes, reservoirs, fish farms, etc. can be mechanically mixed and circulated to replace the water of identity as a circular type of water, thereby securing 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 vessel to spread sediments at the bottom of a lake, a reservoir, or a fish farm to deliver the bar-screen to the ground through a delivery pipe; A second step of filtering and removing impurities such as leaves, plastic, wood chips, and rags included in the delivered sediment using a bar-screen; Adding a flocculant to the dredged sediments from which the contaminants have been removed and stirring the mixture at 150 to 250 rpm for 30 to 90 seconds to rapidly aggregate and aggregate fine organic, inorganic and contaminants to form a fine floc; A fourth step of doubling the volume of the floc by stirring the deposit containing the fine floc again at 50 to 70 rpm and standing for a predetermined time; And In the sediment containing the flocs, a plurality of porous diaphragms having pores, a diaphragm having no pores, and a slanted bottom surface in the solid-liquid separation tank settle the flocs to form a settling solid, and separates the clear water of the supernatant. A fifth step of discharging; Sediment treatment method for water purification of lakes and reservoirs comprising a. The method of claim 1, And a dehydration facility for dewatering the water contained in the solid separated from the sediment to less than 70% at a dredging 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 Sediment treatment method for water purification 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 Sediment treatment for water purification of reservoirs. A suction pump for dredging the sediments of the lake, reservoir and fish farm is delivered to the ground. A suction pipe is connected to the suction port of the suction pump and extends to the bottom of the lake or reservoir and the fish farm. Dredging pump ship connected with delivery pipe extending to bar-screen; A bar-screen for filtering and removing impurities such as leaves, plastics, wood chips, and rags included in the sediment 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 from which the contaminants have been removed is installed to be centrally coupled to the 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. A reducer for agitating the sediment comprising a solids 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; Sediment treatment system for water purification of lakes and reservoirs comprising a. The method of claim 5, And the stirrer is configured to agitate the deposit 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 under the control of a control unit that detects the amount of the sediment flowing into the rapid mixing tank by a flow meter to provide 300 to 400 g of coagulant per ton of the sediment. Sediment treatment system for water purification of the lake and reservoir, characterized in that the input. The method of claim 5, The porous diaphragm plate is installed higher than the height of the deposit stored in the portion close to the bottom surface of the solid-liquid separation tank, the diaphragm plate is installed lower than the height of the deposit is stored in the bottom surface of the solid-liquid separation tank Sediment treatment system for water purification. The method of claim 5, And a solids transfer pump for forcibly discharging 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. Sediment treatment system for water purification of the lake and reservoir, characterized in that the facility is further provided. The method of claim 10, The material of the geotextile hemp is, PP (polypropylene), PE (polyethylene), sediment treatment system for water purification of the lake and reservoir, characterized in that one selected from the group of geotextiles of polyester (polyester) material. 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. A spout treatment system for water purification of lakes and reservoirs, further comprising: a solid cake fermenter for discharging the spout to be opened and closed so that the solid cake is fermented with a recyclable compost and soil improver. 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. Sediment 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 sediment treatment system for water purification of the lake and reservoir, characterized in that it is further provided with a mixed circulation aeration device to be delivered to the bottom of the reservoir and fish farm bottom.