KR101163100B1 - Method and apparatus for purifying polluted sediments in river - Google Patents

Abstract

The present invention can reduce the enormous cost of dredging contaminated sediments by continuously or periodically spraying a mixture of dissolved oxygen-rich surface water and microorganisms capable of degrading contaminants in the stream. It is an object of the present invention to provide a method and apparatus for preventing secondary pollution from occurring.

In the method for purifying a river sediment according to the present invention, after mixing with a microbial culture medium containing aerobic microorganisms that take in surface waters of a river and decompose organic substances, spraying the mixture on the sediments of the stream, the organic matter contained in the sediment It is characterized by decomposing and purifying the substance.

Rivers, Methods of Purification, Sediments

Description

Method and apparatus for purification of contaminated river sediment {METHOD AND APPARATUS FOR PURIFYING POLLUTED SEDIMENTS IN RIVER}

The present invention relates to a purification method and apparatus for restoring an ecosystem by removing river pollution issued by sediments deposited with a large amount of organic components in the bottom of a river, and more specifically, surface water of a river rich in dissolved oxygen. And by spraying a mixture of aerobic microbial culture solution that can decompose pollutants into the sediment in the stream continuously or intermittently to decompose and remove organic components, it can reduce dredging of contaminated sediments and the enormous cost of treating them. The present invention relates to a purification method and a device that can prevent secondary pollution from dredging treatment.

Rainfall, such as rain and snow, enters the rivers through the streams along with various organic matters, pollutants, and soils on the surface of the earth, of which particulate matter tends to settle on the bottom of the rivers. And such a precipitate often contains a large amount of organic substances.

As such, sediment containing a large amount of organic material consumes dissolved oxygen in the water as organic material is decomposed by microorganisms in the water, thereby increasing the biological oxygen demand (BOD) and making the vicinity of the sediment anaerobic to generate a large amount of odor components. This makes it difficult to inhabit aquatic life.

In order to solve this problem, a method of dredging contaminated river sediments and removing contaminants has been widely used. However, not only large dredging equipment is needed for dredging rivers, but also because the accumulation occurs again after dredging, repetitive dredging work is required, which requires enormous costs. In addition, when dredged sediments are buried directly on the ground, odorous components are generated by anaerobic decomposition of organic substances in sediments, and secondary environmental pollution is caused by the outflow of nitrogen and phosphorus.

In order to prevent secondary environmental pollution by dredging of dredged water, a flocculant is added to the dredged water containing a large amount of water, and the sediment is sedimented and separated from water. Incineration is not a fundamental solution because it generates air pollutants, and it is not economical because of the high cost.

The present invention has been made to solve various problems that occur in the conventional landfill or dredging purification process after purging the river sediment contaminated with the above-mentioned organic material, without dredging the contaminated river sediment It is an object of the present invention to provide a method for treating stream sediments which can be treated and at the same time does not cause secondary pollution.

In addition, another object of the present invention is to provide a purification apparatus for performing the above purification method.

In order to solve the above problems, the present invention, by spraying the sediment of the river with a microbial culture medium containing aerobic microorganisms to take the surface water of the river to decompose organic substances by a method of purifying the sediment of the contaminated river, And dissolving the organic matter contained in the deposit through dissolved oxygen contained in the surface water.

In the purification method according to the present invention, 'surface surface water' refers to water flowing within a depth of 10 meters from the surface of a stream rich in dissolved oxygen, and more preferably, water within a depth of 5 meters.

In addition, in the purification method according to the present invention, 'aerobic microorganisms' Bacillus sp., Pseudomonas sp., And Acinetobactor sp. One or more selected from among them may be used.

In addition, in the purification method according to the present invention, the content of dissolved oxygen may be increased by forcibly injecting oxygen or air into the microbial culture solution or surface water in advance. Through this, the activity of aerobic microorganisms is more active than simply using dissolved oxygen naturally contained in surface water, which can further increase the decomposition capacity of contaminated sediments.

In addition, in the purifying method according to the present invention, oxygen or air may be injected into the microbial culture solution or the mixture of surface water. When oxygen or air contained in the liquid is injected into the contaminated sediment, dissolved oxygen around the contaminant is removed. The height acts to make the aerobic microbe more active.

In addition, the present invention as a means for solving the other problems, the present invention, a device for purifying the sediment of the contaminated river, microbial culture means for culturing aerobic microorganisms, water intake means for taking in the surface water of the stream, and the surface water And at least one pump for making the microbial culture liquid at a pressure higher than the water pressure at the bottom of the river, and transfer means for transferring the surface water and the microbial culture liquid having a pressure higher than the water pressure by the pump to the bottom of the river. A main feed pipe connected to the discharge port of the pump, a plurality of branch pipes branched from the main transport pipe in the bottom direction of the stream, and a blow pipe formed to extend in the longitudinal direction along the bottom of the stream from the lower end of the branch pipe; It is made, the spout pipe is formed with a plurality of spouts in the longitudinal direction It provides a device characterized by.

In addition, in the apparatus according to the present invention, the main feed pipe is installed in the bridge piers across the stream, the branch pipe may be installed in the portion facing the downstream of the bridge. In the case of using the bridge piers, the cost of installing the main transport pipe can be greatly reduced, and the cost of installing the device according to the present invention when the bridge piers are applied to rivers installed at regular intervals along rivers such as the Han River. Can be greatly reduced. In addition, when the branch pipe is installed downstream of the pier, it is possible to prevent the branch pipe from being damaged by colliding with an object floating upstream due to a flood or the like.

Further, in the device according to the invention, the power of the device can be supplied from solar power means installed on the bridge. When the solar cell installed on the bridge as an auxiliary power source as a power source for operating the purification device according to the present invention, it is possible to greatly reduce the operating cost of the device.

In addition, the apparatus according to the present invention may further include a compressor for injecting oxygen or air into the mixture of the microbial culture solution and the surface water.

In the apparatus according to the present invention, a valve is provided at the connection portion between the main feed pipe and the branch pipe, and the valve is remotely controllable. Through this configuration, the manager can supply the mixture through opening and closing of the valve by providing the operating time for each outlet pipe, which can reduce the burden of the pump and reduce the pump installation cost.

The stream sediment purification method and apparatus according to the present invention spray a mixture of microbial culture medium and surface water rich in dissolved oxygen to decompose the sediment at the bottom of the contaminated river by decomposing the organic matter contained in the sediment, so that the atmosphere around the sediment is rich in dissolved oxygen. At the same time, it decomposes and removes dissolved oxygen-containing organic matter through aerobic microorganisms, transforming the ecosystems of contaminated riverbeds into aquatic environments.

In addition, since the purification method and apparatus according to the present invention purifies the sediment of the contaminated river bottom without dredging to the ground, it can not only reduce the enormous cost required for dredging and dredging of the sediment, but also dissolved oxygen. Because of the forced circulation to the riverbed and rich aerobic microorganisms to decompose high-molecular substances into low-molecular substances that are harmless to humans, secondary environmental pollution does not occur.

Accordingly, the purification method and apparatus according to the present invention are suitable for rivers, cows and the like with many deposits containing a large amount of organic substances.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the apparatus for purifying polluted sediment of the river according to an embodiment of the present invention and a purification method using the apparatus. However, the present invention is not limited to the following examples, and it is obvious to those skilled in the art that the present invention may be variously changed without departing from the technical spirit of the present invention.

1 is a schematic view of a purifier according to an embodiment of the present invention, FIG. 2 is a partially enlarged view of FIG. 1, and FIG. 3 is a view illustrating an installation state of a transfer pipe constituting a purifier according to an embodiment of the present invention. Drawing.

Purification apparatus 10 according to an embodiment of the present invention is a microbial culture means 100 for culturing aerobic microorganisms largely to produce a microbial culture solution, a water intake pipe 200 for taking in the surface water of the river, and the surface water taken in And one or more pumps 300 for mixing the microbial culture solution and pressurizing them to a pressure higher than the water pressure at the bottom of the stream, a transfer pipe 400 for transferring the mixture pressurized by the pump to the bottom of the stream, and the mixture. Compressor 500 for injecting oxygen or air, and solar power generation means 600 for auxiliary supply of power for operating the microorganism culturing means 100, intake pipe 200, pump 300, and compressor 500. And control means 700 for controlling these means.

The microorganism culturing means 100 is a commercial microorganism incubator 110 capable of culturing aerobic microorganisms in bulk, and a microorganism storage tank 120 for storing the cultured microorganisms and a withdrawal tube for extracting the culture solution from the microorganism storage tank 120 ( 130), the outlet pipe 130 is provided with a first control valve 140 for controlling the amount of microbial culture. On the other hand, the microorganism culture means 100 is installed in the interior space of the building installed in the vicinity of the river to avoid rainfall.

The intake pipe 200 is made of stainless steel, one end is connected to communicate with the outlet pipe 130, and the other end is installed to take surface water within 5 meters of depth from the surface of the river at the periphery of the river. In addition, the intake pipe 200 is provided with a second control valve 210 for controlling the amount of surface water, it is possible to adjust the concentration of the microbial culture. On the other hand, if the capacity of the pump 300 is not sufficient, it is possible to take out the surface water using a separate intake pump, and if you want to supply dissolved oxygen to the surface water additionally to take the water in the stream and store it Equipped with a water tank, and after injecting air or oxygen into the water tank for a predetermined time, it may be injected by inhaling it through the pump.

The pump 300 is fixedly installed on the cradle 121 formed in the cross-section "a" shaped on the top of the microorganism storage tank 120 and the suction port 310 is connected to the outlet pipe 130, microorganisms The culture solution and the surface water of the river can be sucked, and the discharge port 320 is connected to the transfer pipe 400.

The transfer pipe 400 is connected to the discharge port 320 of the pump and the main transport pipe 410 is installed along the cradle 800 of the upper portion of the bridge pier is installed across the river, and the main transport pipe 410 The branch consists of a plurality of branch pipes 420 extending to the bottom of the stream along the pier, and a branch pipe 430 connected to the branch pipe 420 extending in the downstream direction of the stream. In addition, a valve 440 capable of remote control is disposed at the connection portion between the main feed pipe 410 and the branch pipe 420 so that the main feed pipe 410 and the branch pipe 420 can be opened and closed as necessary. The jet pipe 430 is formed with a plurality of jet holes 431 in the radial direction along the longitudinal direction, the mixture of the microbial culture medium and the surface water flowing inside the jet pipe 430 through the jet port 431 bottom of the river It can be ejected to

The compressor 500 is for forcibly injecting oxygen into the mixture of the microbial culture solution and the surface water, using a conventional large-capacity compressor, the discharge port is in communication with the blowout pipe 130, the discharge port of the compressor 3 control valve 510 is provided to adjust the amount when oxygen or air is injected into the mixture.

As shown in FIG. 1, the solar power generator 600 is stored with a solar panel 610 installed in a frame formed on an upper portion of a bridge and a storage battery 620 for storing electromotive force generated in each solar panel 610. The inverter 630 converts direct current electricity into alternating current electricity.

The control means 700 is a conventional personal computer equipped with a control program capable of controlling the respective means, and is connected to each other so as to transmit a control command to each means as shown in FIG.

Hereinafter, an operation relationship of the river sediment purification apparatus 10 according to the embodiment of the present invention will be described.

First, the microorganisms are cultured through the microorganism incubator 110 and stored in the microorganism storage tank 120.

Subsequently, when the pump 300 is operated, the microbial culture solution is sucked through the extraction tube 130 of the microorganism storage tank 120, and at the same time, the surface water is also sucked through the intake tube 200 communicating with the extraction tube 130. The sucked microbial culture medium and the surface water are mixed in the extraction tube 130. At this time, air or oxygen is forcibly injected through the compressor 500 connected to the blowout pipe 130.

As such, the mixture of the microbial culture medium and the surface water containing air or oxygen is supplied at a high pressure to the main transport pipe 410 through the pump 300, and the supplied mixture is blown through the branch pipes 420. It is supplied with the pressure maintained. On the other hand, in the embodiment of the present invention, the air or oxygen is injected into the mixture, if the dissolved oxygen of the surface water and the microbial culture solution is not necessary to inject air or oxygen separately. In addition, the concentration of the microbial culture medium and the amount of oxygen or air are adjusted using the first, second and third control valves according to the state of the deposit.

In addition, through the valve 440 provided between the main feed pipe 410 and each branch pipe 420, by adjusting the opening and closing time and opening and closing period of the specific branch pipe 420 to supply the mixture to each branch pipe. .

As such, the mixture supplied to the branch pipe 420 is ejected to the sediment at the bottom of the stream through the jet port 431 of the jet pipe 430 to decompose the organic material contained in the sediment. It removes the BOD of the stream and changes it to an environment where aquatic life can live.

On the other hand, the electromotive force generated through the solar cell 610 installed on the bridge is stored in the storage battery 620, the stored direct current is converted into an alternating current through the inverter 630 as an energy source such as a pump, microorganism culture means Used.

Each of the devices are controlled by a computer, as shown in FIG. 4. The computer obtains information on the status of each device through a sensor or the like installed in each means, such that the microbial culture apparatus operating time and pump operating time are obtained. In addition, it provides control commands for opening and closing of each valve installed in the main feed pipe and branch pipe. In addition, the amount of power generated by the solar power generation means provides a control instruction on whether to use the power generated by solar power or the power provided by the existing power plant.

1 is a schematic diagram of a purification apparatus according to an embodiment of the present invention.

FIG. 2 is a partially enlarged view of FIG. 1.

3 is a view showing an installation state of the transfer pipe of the purification device according to an embodiment of the present invention.

4 is a block diagram of a control device for controlling the purification device according to an embodiment of the present invention.

Claims (7)

delete delete delete Apparatus for purifying contaminated sediment in streams, Microbial culture means for culturing aerobic microorganisms, Water intake means for taking in the surface water of the river; At least one pump for pressurizing the surface water and the microbial culture to a pressure higher than the water pressure at the bottom of the river; It includes a transport means for transferring the surface water and microbial culture medium having a pressure higher than the water pressure by the pump to the bottom of the river, The conveying means is formed by a main conveying pipe connected to the discharge port of the pump, a plurality of branch pipes branched from the main transport pipe in the bottom direction of the stream, and extending in the longitudinal direction along the bottom of the stream from the lower end of the branch pipe. It is made of a spout pipe, the spout pipe is formed with a plurality of spouts in the longitudinal direction, The main transport pipe is installed along the pier of the bridge constructed in the river, the branch pipe is characterized in that installed in the portion facing the downstream of the pier. delete 5. The apparatus of claim 4, wherein the power of the apparatus is supplied from solar power means installed on the leg. 5. An apparatus according to claim 4, further comprising a compressor for injecting oxygen or air into said conveying means.

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