JP3273358B2 - Lake and swamp purification method and apparatus - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention has an object to purify lakes and marshes by separating solid and liquid sludge and the like deposited on the bottoms of lakes and marshes, treating separated solids and liquids separately. The present invention relates to a method and an apparatus for purifying a lake or swamp.

[0002]

2. Description of the Related Art Conventionally, as for purification of lakes and marshes, purification by dredging or intermittent air pumping apparatus is known (Japanese Unexamined Patent Publication No. Sho 3).
-7440).

[0003]

The above-mentioned conventional dredging is effective in recovering the water depth of lakes and swamps, but has a problem that it cannot be expected to have a sufficient effect in purifying water.

The intermittent air pumping apparatus is effective for dams, lakes, and swamps having a relatively deep water depth. However, it is difficult to purify sludge of lakes and swamps, which have a shallow depth of water and have accumulated organic and inorganic substances for many years. There was a problem of becoming.

[0005]

SUMMARY OF THE INVENTION According to the present invention, sludge deposited on lakes and swamps is collected together with water, and after adding shell fossil powder, solid and liquid are separated, thereby dredging in relatively shallow lakes and swamps. Thus, the conventional problem is solved.

[0006] That is, the invention of the method is to mix fossil shell powder with sludge water collected from the bottom of a lake or marsh, and then to separate solid and liquid into suspended solids, precipitated solids and water. This is a lake and swamp purification method characterized in that solids are separately separated and dewatered, and the separated water is discharged to lakes and swamps. The mixing of sludge water etc. with shell fossil powder is characterized by adding shell fossil powder at the time of inhalation sampling of sludge water or the like, or mixing shell fossil powder after inhalation sampling. And the like, while separating the large solids and the small solids, which have a large specific gravity, while feeding.

Next, the invention of the apparatus is intended to provide means for collecting sludge water and the like from a lake or a swamp bottom, means for transporting the collected sludge water or the like, means for mixing shell fossil powder with sludge water, and means for solid-liquid separation of a mixture. And a purification device for a lake or swamp, wherein treatment means for separating solids and liquid are sequentially connected, and the sampling means is adjusted to protrude from a water support device such as a hull and a pump is provided at a base end side of a suction pipe. Are connected to each other, and are suctioned and collected by the suction pipe. The transfer power means uses a pump or a jet fluid, and the mixing means of the shell fossil powder and the sludge water is provided by adding an injection pipe of the shell fossil powder to the suction pipe, or a shell for the mixing tank. A fossil powder supply device is provided. Further, the solid-liquid separation means is provided with a suspended matter scooping device at the upper part of the separation tank having the bottom plate obliquely connected, a drainage pipe connected to the middle upper part, and a sediment discharge device facing the lower part. The means for treating solids is a drainage device provided with a water collecting tank below the vibrating sieve.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is a repetition of adding shell fossil powder to sludge water collected from lakes and swamps, separating them into solids and liquids, treating them separately, and returning the separated purified water to lakes and swamps. In this method, dredging and water purification are performed simultaneously in parallel.

In order to carry out the above-mentioned method, a means for collecting sludge water or the like, a means for mixing with fossil shell powder, a means for separating solid and liquid, a means for treating separated solid matter and a means for treating separated liquid are connected to lakes and swamps. It is a purification device.

The above-mentioned apparatus is movable and processes a certain distance (for example, 1 km) from the shore of a lake, a swamp, etc. toward the center, and the unprocessed portion remaining in the center of the lake, a swamp, etc., is processed on board. For example, efficient means can be selected and implemented according to the location conditions of lakes and swamps.

[0011]

Embodiment 1 An embodiment of the present invention will be described with reference to FIG.

Sludge and the like precipitated from lakes and swamps are collected together with water (water content: 70-80%), and the fossil shell powder 0.1
~ 0.5% (by weight), add uniform mixing and transfer
Alternatively, the shell fossil powder is mixed while the sludge water or the like is being transferred, or the shell fossil powder is mixed by putting the sludge water or the like into a mixing tank.

After the shell fossil powder as described above is uniformly mixed, it is transferred to a sedimentation tank. The sludge water and the like are subjected to actions such as aggregation, adsorption, and oxidation by the shell fossil powder, and organic substances having a low specific gravity (e.g., blue-green algae, other algae) float,
Organic substances and inorganic substances having a high specific gravity precipitate. The separated water (purified water) is discharged to lakes and swamps, and the sediment is taken out, dehydrated, and then accumulated. The sediment contains a relatively large amount of shell fossil powder, which contributes to the supply of oxygen, adjustment of pH, and the propagation of aerobic bacteria. (Since it is in contact with air, oxygen is sufficiently supplied.) . The organic matter is rapidly decomposed by aerobic bacteria, and can be rapidly dried due to an increase in inorganic matter (such as sand). Especially when there are many organic substances, the heat of fermentation also promotes drying. The soil thus treated can be used as soil improvement soil or landfill soil.

Since the suspended matter contains many organic substances such as algae, if it is scooped out and accumulated, dehydration and fermentation proceed (depending on the effect of shell fossil powder), and if necessary, other materials (eg, calcium, etc.) Can be used as feed for livestock, or can be mixed with chicken manure to produce fertilizer.

As described above, the organic matter in the water and the sediment at the bottom of the water can be treated simultaneously and in parallel, and the purified water is discharged to the lake and the swamp. Therefore, the untreated water in the lake and the swamp is diluted by adding the purified water. The action can be expected, and the action of the shell fossil powder mixed into the purified water affects the untreated water, thereby promoting the purification treatment.

[0016]

Embodiment 2 An embodiment of the apparatus according to the present invention will be described with reference to FIGS.

A suction pipe 2 is obliquely provided on one side of the dredger 1, and the suction pipe 2 is suspended by a crane 3 and connected to a suction side of a pump 5 via a hose 4. Therefore, even when the suction end of the suction pipe 2 is moved back and forth and right and left by the crane 3, the hose 4 can be freely operated by bending and expanding and contracting.
The discharge side of the pump 5 is connected to the transfer pipe 6, which passes through the upper part of the machine room 7 and the like, is supported by the floating bodies 8, 8,
Reach Lakeshore 9. On the lake shore 9, a mixing tank 10 is installed on a frame 11, and the transfer pipe 6 is connected to one side of the mixing tank 10.
The end is opened to the injection chamber 12, and shell fossil powder (for example, 100 to 200 mesh) is injected. Mixing tank 10
Downflow guide plates 13 and 14 are obliquely provided therein, and projecting pieces 16 and 16 are provided on each of the downflow guide plates 13 and 14 and the bottom plate 15, respectively. Then, the sludge water mixed with the shell fossil powder in the spray chamber 10 is uniformly mixed by the stirring action while flowing down the flow guide plates 13 and 14 and the bottom plate 15.
7 and discharged into the sedimentation tank 18.

The sedimentation tank 18 has a bottom plate 18a which is inclined downward in the traveling direction. The discharge port 17 faces one side of the sedimentation tank 18 and the purified water discharge port 19
And the tip of the suction pipe 21 for the sediment 20 are provided.
In addition, a lower part of a net conveyor 23 for scooping up the suspended matter 22 is installed obliquely in the upper part of the sedimentation tank 18, and an upper part of the net conveyor 23 faces the unloading conveyor 24 (FIG. 7). In the figure, 50 is a hopper, 51 is a power of a net conveyor, and 52 is a water receiver.

A suction end of a suction pump 25 is connected to the suction pipe 21, and a transfer pipe 2 is connected to a discharge side of the suction pump 25.
6 are connected to each other.
7, 28 are connected in series. Separation boxes 27, 28
Are connected to the hoppers 29 and 30,
Automatic or manual opening / closing lids 31 and 32 are installed at the outlets of the hoppers 29 and 30, respectively. FIG. 8 shows automatic opening / closing lids 31 and 32. When the weight of the accumulated gravel becomes larger than the elasticity of the springs 33 and 34, the shaft 3
Rotate in the directions of arrows 37 and 38 around 5, 36,
Gravel or sand as shown by arrows 39 and 40 on conveyors 41 and 4
2 Discharge up. When the weight of the gravel or the like is reduced by the release, the opening / closing lids 31 and 32 are
With the resiliency of 34, it rotates in the opposite direction, closing the outlet of the hopper.

Since the inside of the separation boxes 27 and 28 has a larger cross-sectional area than the cross-sectional area of the transfer pipe 26 and the flow velocity decreases,
Relatively large gravel, sand, etc. settle down one after another and hopper 2
The small soil particles and the like that are deposited in the sifters 9 and 30 are sent as indicated by arrows 43 and discharged into the vibrating sieve 44. The solid and liquid are separated by the vibrating sieve 44, the water is discharged to the lake or swamp through the drain pipe 45 as shown by arrow 49, and the soil and the like are carried by the conveyor 46 as shown by arrow 47, and the soil is deposited on the accumulation area. 48. When organic matter is mixed in the soil or the like, it is fermented and decomposed by microorganisms during deposition to promote drying of the soil or the like. This dried soil has a water content of 30% or less and is useful soil for landfill or soil improvement soil. It has no odor and is easy to handle. Can be used.

The above-mentioned embodiment shows an example of the treatment of sludge water and the like, and the treatment of water, suspended organic matter, other solid matter and the like after solid-liquid separation can employ a conventionally known technique. . The point is to add and mix shell fossil powder to sludge water, etc., and to efficiently treat sludge water, etc. by the excellent properties of shell fossil powder, and to convert it into purified water, useful organic matter (feed, fertilizer) and useful soil. Purification of lakes and marshes and utilization of sludge water are the most important objectives.

The gravel or sand separated during the transfer of the sediment is an excellent coarse aggregate of concrete used for civil engineering and construction,
It can be used as fine aggregate.

[0023]

Embodiment 3 Another embodiment of the present invention will be described with reference to FIG. In Example 2, the inhaled mixture of mud, soil, and water was mixed with shell fossil powder in a mixing tank. In this example, mixing was attempted during transfer.

That is, the suction pipe 2 is obliquely provided on one side of the dredger 1,
The suction pipe 2 is suspended by a crane 3 and connected to a suction side of a pump 5 via a hose 4. An injection box 50 for shell fossil powder is provided at an appropriate position of the suction pipe 2, and a nozzle (not shown) for blowing shell fossil powder with air.
Project into the suction pipe 2. The discharge side of the pump 5 is connected to a transfer pipe 6. The transfer pipe 6 passes through an upper portion such as a machine room 7, is supported by floating bodies 8, 8 and reaches a lake shore 9. When the transfer pipe 6 passes through the upper part of the machine room 7 and descends, a certain water pressure is applied, and the mixture moves smoothly and easily in the transfer pipe after that. In the figure, reference numeral 60 denotes a jet box for blowing pressurized air to accelerate the mixture.

The transfer pipe 6 reaching the lake shore 9 is supported at a high level by a supporting leg 51, and separation casings 52, 53 and 54 are connected in series at predetermined intervals. Therefore, the mixture of mud, soil, and water separates large sand particles in the separation box 52, and then separates the
In 3, the medium sand is separated, and the small sand is further separated in the separation box 54. Then, the fine soil is taken out from the discharge pipe 56 to the outside world, and dried to be used as fertilizer (a fertilizer effect because it is a mixture of aoko and other organic matter and shell fossil powder) and used as soil improvement soil. The supernatant 59 is returned to the lake via the drain pipe 57.

According to the above embodiment, the shell fossil powder is supplied during the transfer of the mixture of mud, soil and water, so that the mixture can be uniformly mixed during the transfer. Therefore, a mixing tank is not required, and the apparatus can be simplified. Separate boxes 52, 53, 5
Since 4 were installed in series, gravel and the like can be separated according to particle size. Therefore, separated materials such as sand and gravel can be separately collected and sold as aggregates such as concrete.

[0027]

[Experimental example] A fossil shell powder was mixed into the water of a lake or a swamp, and a water purification test was carried out. The results shown in Table 1 were obtained.

[0028]

[Table 1]

* For none, the management reference value has not been examined yet.

* 1 g of powder coagulant per liter, 3 g,
5 g, 1 liter of water, 100 g of sand and 3 g of additive were tested.

As a result of the experiment, 1 the visibility was changed from 5 cm to 30 cm, and the effect of about 6 times was recognized. Chromaticity was 165, which was 165, a decrease of about 91.3%. 3 The turbidity was 93, which was 93, a decrease of about 96%. 4 The number of E. coli 17000 was 230, a decrease of about 98.6%. 5 Floating matter was changed from 110 to 3, and approximately 97% was removed. What was 6 COD 40 was 6.5, a decrease of about 84%. 7 DO Within the standard value 8 PH 9.0 was changed from 9.0 to 7.7, which is always neutral.

As mentioned above, the addition of fossil shell powder reduces water purification , reduces E. coli and COD, and removes suspended matter.
And other remarkable effects.

[0033]

According to the present invention, since shell fossil powder is mixed into sludge water or the like collected from lakes and swamps, sludge treatment and water quality improvement are performed simultaneously in parallel , and organic substances are decomposed by aerobic bacteria. Water is discharged into lakes and swamps, sludge is used as useful gravel, sand, and soil for various purposes, and suspended organic matter is processed for feed, fertilizer,
There are various effects such as may be used for other (e.g., soil break Ryozai).

Further, since the used substance is shell fossil powder, there is no danger of causing pollution even if it is left in purified water or soil, and it has an effect of continuously exerting an effect on water purification or soil quality improvement.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of the method of the present invention.

FIG. 2 is a conceptual diagram of an embodiment of the apparatus.

FIG. 3 is an enlarged front view showing the collection and transfer device.

FIG. 4 is a plan view of the same.

FIG. 5 is an enlarged front view of the mixing tank.

FIG. 6 is a partially enlarged plan view.

FIG. 7 is an enlarged front view of the sedimentation tank.

FIG. 8 is an enlarged view of a part of the gravel separation device.

FIG. 9 is a conceptual diagram of another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dredge ship 2 Suction pipe 3 Crane 4 Hose 5 Pump 6 Transfer pipe 7 Machine room 8 Floating body 9 Lake shore 10 Mixing tank 11 Frame 12 Injection chamber 13, 14 Downflow guide plate 15 Bottom plate 16 Projection 17 Drain 18 Sedimentation tank 18a Bottom plate 19 Discharge Outlet 20 Precipitate 21 Suction pipe 22 Suspended material 23 Net conveyor 24 Unloading conveyor 25 Suction pump 26 Transfer pipe 27, 28 Separation box 29, 30 Hopper 31, 32 Opening lid 33, 34 Spring 35, 36 Shaft 41, 42 Conveyor 44 Vibration Sieve 45 drain pipe 46 conveyor 48 sedimentary soil 50 blowing box 51 supporting legs 52, 53, 54 separation box 55 sedimentation tank 56 drain pipe 57 drain pipe 58 fine soil etc. 59 supernatant liquid 60 jet box

Continuation of the front page (56) References JP-A-9-187776 (JP, A) JP-A-2-268888 (JP, A) JP-A-57-91786 (JP, A) JP-A-51-141457 (JP, A) JP-A-7-327544 (JP, A) JP-A-7-100460 (JP, A) JP-A-47-20945 (JP, A) JP-A-6-178983 (JP, A) 5-111697 (JP, A) JP-A-6-134499 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) C02F 1/52-1/56 C02F 11/00-11 / 20

Claims (2)

(57) [Claims] 1. Inhalation sampling of sludge water collected from lakes and swamp bottoms
At the time of collection or after inhalation sampling, 0.1 to 0.5 of the sludge water etc.
% (Weight) of shell fossil powder and then the sludge water etc.
During the transfer , solid-liquid separation is performed into suspended solids, precipitated solids and water, and the separated suspended solids and precipitated solids are separately taken out, and organic substances are decomposed by aerobic bacteria.
Are, together with the respective dehydrating, separation water contains aerobic bacteria
A method for purifying lakes and swamps, characterized by being discharged into lakes and swamps as they are. 2. A water support such as a hull provided on the water of a lake or swamp.
The suction pipe is adjustably protruded from the device, and the discharge of the suction pipe is performed.
On the outlet side, transfer power means by pump or jet liquid
Connected, an inlet pipe for shell fossil powder is attached to the suction pipe,
Is a mixture of fossil shell powder in a mixing tank installed on the discharge side of the suction pipe.
Provide a supply device, and mixing means of fossil shell powder and sludge water
Then, one side of the separation tank is connected to the discharge side of the mixing tank,
Separation tank is equipped with a suspended solids collection device and a sediment discharge device
And the apparatus for collecting the suspended matter and the apparatus for discharging the sediment
Characterized in that dewatering treatment means are sequentially connected to each other
Lake and swamp purification equipment.