CN104003527B - A kind of polluted water body in-situ prosthetic device and method thereof - Google Patents

Abstract

The invention discloses an in-situ restoration device for polluted water bodies and a method thereof. The main points of the technical solution of the present invention are: an in-situ remediation device for polluted water, including a microbial treatment system and a phytoremediation system arranged above the microbial treatment system, wherein the microbial treatment system mainly consists of a microbial reaction tank, a floating tank, a drainage pump, a suspension The phytoremediation system includes a plant fixed layer and functional plants fixed on the plant fixed layer. The invention also discloses a water purification method using the in-situ restoration device for polluted water. The invention utilizes microorganisms to degrade pollutants in water and plants to absorb elements such as nitrogen and phosphorus in water to realize the purpose of in-situ restoration of polluted water bodies.

Description

Device and method for in-situ remediation of polluted water

technical field

The invention belongs to the technical field of water pollution treatment in environmental protection, and in particular relates to an in-situ restoration device for polluted water and a method thereof.

Background technique

With the progress of society and the development of science and technology, the number of various industrial factories is increasing day by day. While promoting economic development, these factories have also brought threats to the living environment. Environmental problems have developed from local to global threats. Water is the source of life, and a large number of pollutants enter the water body, resulting in eutrophication of the water body, a serious drop in water environment indicators, and an extremely serious threat to the survival of organisms, such as the Huaihe River Basin in my country. All countries in the world are paying more and more attention to sewage treatment and reuse technology, realizing the sustainable use of water resources and curbing the aggravation of water pollution are imminent.

At present, there are three main methods to improve water quality: physical methods, chemical methods and biological methods. The physical method is to use structures such as grids, screens, grit chambers, sedimentation tanks and grease traps to remove suspended solids and slick oil in wastewater, and initially reduce the degree of corrosion of wastewater. This method often fails to completely eradicate Effect. The chemical method is to add certain chemical substances, change the chemical properties of the pollutants in the wastewater through chemical reactions such as neutralization, oxidation, reduction, decomposition, flocculation and chemical precipitation, so as to change their chemical or physical state, and then remove them from the water. This method may introduce new pollutants, which is not conducive to its promotion and use. The biological method is to use the metabolism of microorganisms to oxidize and degrade the organic pollutants in the wastewater into harmless substances. This method is also called biochemical treatment and is the most important method for treating organic wastewater. Among them, the biological treatment method of wastewater is based on the method that microorganisms convert complex organic matter into simple substances and toxic substances into non-toxic substances through the action of enzymes. Compared with the three methods, the biological method has obvious advantages, the investment of the biological method is small, the effect is obvious, and it does not produce secondary pollution, so the biological method has been widely used in water environment treatment.

Biological methods also include ectopic repair and in situ repair. Among them, ex-situ remediation is a technology that pumps out the polluted water body and then treats it. This technology has a large amount of treatment in a short period of time and a high treatment effect. However, long-term application generally has phenomena such as tailing and rebound, which ultimately reduces the treatment efficiency. Increased processing costs. In-situ remediation technology has been widely used in the field of water pollution remediation due to its advantages of thorough remediation, various types of pollutants, relatively short time and relatively low cost.

Chinese patent application number 200610076417.1, authorized announcement date is March 5, 2008, the name of the invention is ecological reactor for in-situ restoration of water body. In-situ restoration of water body can not only improve the efficiency of water body restoration and purification without secondary pollution, but also reduce the cost. However, due to the constraints of natural weather factors, the purification effect of the in-situ restoration of water body ecological reactor will be affected. Chinese Patent Application No. 200310103050.4, published on October 27, 2004, the invention is called a horizontal swirl suspension carrier biofilm reactor and its in-situ repair method for water body. The invention starts from the characteristics of the in-situ repair reactor for water body. The structure of the reactor, carrier selection and dosage are optimized, so that when the reactor is in normal operation, the carrier particles can be fully suspended under the condition of higher carrier dosage and lower aeration, and Maintain the state of horizontal swirling flow, thereby effectively improving the removal rate of organic pollutants and ammonia nitrogen in the reactor, but this device is greatly affected by water flow, it is difficult to control its position in rivers and lakes, and there are many manual operations and complicated management. In addition, the technical solutions of other patents also have various shortcomings and deficiencies.

Contents of the invention

The purpose of the present invention is to provide an in-situ repairing device and method for polluted water in combination with microbial treatment technology and water phytoremediation, aiming at the current situation of polluted water in my country.

The technical solution of the present invention is: an in-situ restoration device for polluted water, which is characterized in that it includes a microbial treatment system and a phytoremediation system arranged above the microbial treatment system, wherein the microbial treatment system is mainly composed of a microbial reaction tank, a floating tank, and a drainage pump. , suspended filler, air duct, blower fan, aeration head and automatic water inlet valve, the floating tank is fixed around the top of the microbial reaction tank through a tripod, the drainage pump is fixed on the floating tank, and the inlet of the drainage pump The water outlet is connected to the drainage pipe extending into the microbial reaction box, the outlet of the drainage pump is connected to the outside world, the suspended filler is suspended in the water in the microbial reaction box, and the air duct is laid at the bottom of the entire microbial reaction box. The end is connected to the air outlet of the fan installed on the floating tank, the fan and the drainage pump are respectively connected to the external cables, the aeration head is fixed on the air pipe at the bottom of the microbial reaction tank, and the automatic water inlet valve is set on the microbial reactor. The bottom of the reaction tank, the automatic water inlet valve includes a valve body and an inlet pipe and an outlet pipe arranged on the valve body, wherein the inlet pipe communicates with the outside world, and the outlet pipe communicates with the microbial reaction tank; the phytoremediation system includes a plant The fixed layer and the functional plants fixed on the plant fixed layer, wherein the plant fixed layer is fixed on the upper quarter of the microbial reaction box through a tripod, and the plant fixed layer is mainly composed of perforated plastic plates and pebbles distributed above the perforated plastic plates , sand, peat or rock wool, and the functional plants are fixed on the plant fixing layer, and the functional plants are one or more of reeds, cannas, water hyacinths or rushes.

The in-situ remediation method of polluted water body according to the present invention is characterized in that the specific steps are as follows: first, the in-situ remediation device for polluted water body is fixed in the polluted water body, and the water level in the microbial reaction tank is controlled by an automatic water inlet valve. When the water level in the microbial reaction tank is lower than the set position, the automatic water inlet valve will automatically open and start water intake. When the water level in the microbial reaction tank is higher than the set position, the automatic water intake valve will automatically close and stop water intake. When the height is set, it enters the aeration stage, the fan is automatically turned on for aeration, and after 3-8 hours of aeration, it enters the sedimentation stage. After 0.5-2 hours of sedimentation, the drainage pump automatically starts to drain water, and the drainage pump is automatically controlled by the set liquid level to stop. When the liquid level reaches the set position, the drainage pump stops running, and then the automatic water inlet valve automatically opens to start water intake, and enters the next cycle.

Compared with the prior art, the present invention has the following beneficial effects: (1) Utilize microorganisms to degrade pollutants in water and plants absorb nitrogen, phosphorus and other elements in water to achieve the purpose of in situ repairing polluted water bodies; (2) materials are easy to obtain , low cost, in line with the economic requirements of water pollution treatment; (3) The treatment effect is remarkable, no secondary pollution, this technology uses the joint action of microorganisms and plants to treat polluted water, economical and environmentally friendly, in line with sustainable development; ( 4) Good stability, the floating box can keep the whole device stable on the water surface, ensuring the smooth progress of each link; (5) The whole repair operation process is highly automated, saving manpower and material resources for operation management; (6) The ecological landscape effect is good , Functional plants can form a water landscape and beautify the water environment.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Drawing description: 1. Microbial reaction box, 2. Floating box, 3. Drainage pump, 4. Suspended filler, 5. Air duct, 6. Fan, 7. Aeration head, 8. Mechanical automatic water inlet pump, 9. Plant Fixed layer, 10, functional plants.

detailed description

Embodiments are described in detail with reference to the accompanying drawings. An in-situ remediation device for polluted water, including a microbial treatment system and a phytoremediation system arranged above the microbial treatment system, wherein the microbial treatment system mainly consists of a microbial reaction tank 1, a floating tank 2, a drainage pump 3, a suspended filler 4, and an air duct 5. Composed of fan 6, aeration head 7 and automatic water inlet valve 8, the floating box 2 is fixed around the top of the microbial reaction box 1 through a tripod, and the floating box 2 makes the whole device under the action of gravity and buoyancy To achieve balance, in order to maintain the stability in the water, the floating box 2 adopts a clinker floating box with a size of 0.5m*0.5m*5m, the microbial reaction box 1 adopts a cast iron box with a size of 5m*5m*2m, and the drainage pump 3 is fixed on Above the floating tank 2, the water inlet of the drainage pump 3 is connected to the drainage pipe extending into the microbial reaction tank 1, and the water outlet of the drainage pump 3 communicates with the outside world, and the drainage pump 3 is used to discharge the treated water to make the microorganisms react The water level in the box 1 drops to half of the height of the box body, and the suspended filler 4 is suspended in the water in the microbial reaction box 1. The suspended filler 4 is made of an organic copolymer material and a hollow circular three-dimensional structure. It can float freely, and the suspended filler 4 increases the surface area of microorganisms, which can achieve good results in sewage treatment. The air duct 5 is laid at the bottom of the entire microbial reaction box 1, and the air duct 5 can be galvanized steel pipe or clinker The outer end of the air pipe 5 is connected to the air outlet of the fan 6 arranged on the floating tank 2, and the fan 6 and the drainage pump 3 are connected to the external cables respectively, and the fan 6 is used to run the microbial reaction tank 1 The aeration stage in the process provides pressure air, which is transported to the aeration head 7 through the air duct 5 to generate tiny air bubbles to increase the dissolved oxygen in the water in the microbial reaction tank 1, thereby improving the efficiency of the biochemical reaction. The aeration head 7 is fixed on the microorganism On the air duct 5 at the bottom of the reaction box 1, an automatic water inlet valve 8 is arranged on the bottom of the microbial reaction box 1, and the automatic water inlet valve 8 includes a valve body and an inlet pipe and an outlet pipe arranged on the valve body, wherein the water inlet pipe and the outlet pipe The outside is connected, and the outlet pipe is connected with the microbial reaction box 1. The automatic water inlet valve 8 is used to control the opening and closing of the water inlet. When the water level in the microbial reaction box 1 is lower than the set position, it will automatically open and start water intake. When the water level in the microbial reaction box 1 is higher than the set position, it is automatically closed to stop the water intake. The operation of the microbial reaction box 1 is divided into four stages: water intake-aeration-sedimentation-drainage, and the water intake stage is automatically controlled by the automatic water inlet valve 8. Control, the water intake time is 10-30min, the aeration stage is automatically controlled by the liquid level, when the liquid level in the microbial reaction tank 1 reaches the set position, the fan 6 is automatically turned on, the aeration time can be set according to the water quality, the setting range 3-8h, enter the sedimentation stage after the aeration is over, the time is 0.5-2h, after the sedimentation stage is over, the drainage pump 3 will automatically start to start drainage, the drainage pump 3 will be automatically controlled by the liquid level to stop, and the water will be drained when the liquid level reaches the set position The pump 3 stops running, and then the automatic water inlet valve 8 automatically opens and starts to enter the next cycle; the phytoremediation system includes a plant fixation layer 9 and a functional plant 10 fixed on the plant fixation layer 9, wherein the plant fixation The layer 9 is fixed on the upper quarter of the microbial reaction box 1 through a tripod, and the plant fixing layer 9 is mainly composed of perforated plastic plates and pebbles, sandstone, peat or rock wool distributed above the perforated plastic plates. The functional plant 10 is fixed on the plant fixing layer 9, and the functional plant 10 is one or more of reed, canna, water hyacinth or rush. The functional plant 10 can not only effectively remove nutrients such as nitrogen and phosphorus in the polluted water body, but also purify Water quality, and can form water landscape, beautify the water environment.

The in-situ restoration method of polluted water body according to the present invention, the specific steps are as follows: first, the in-situ restoration device for polluted water body is fixed in the polluted water body, and the water level in the microbial reaction box is controlled by an automatic water inlet valve to be up to one-third of the height of the box body The second place, the lowest is half of the height of the box. When the water level in the microbial reaction box is lower than one-half of the box height, the automatic water inlet valve opens to start water intake. When the water level in the microbial reaction box is higher than When the height of two-thirds of the box is high, the automatic water inlet valve is closed to stop water inflow. When the water level in the microbial reaction box reaches two-thirds of the box height, it enters the aeration stage, and the fan automatically turns on for aeration, and enters after 4 hours of aeration. In the sedimentation stage, after 0.5 hours of sedimentation, the drainage pump starts to drain automatically, and the drainage pump is automatically controlled by the liquid level to stop. When the liquid level reaches 1/2 of the height of the tank, the drainage pump stops running, and then the automatic water inlet valve automatically opens to start water intake , enter the next cycle.

The above embodiments have described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What are described in the above embodiments and description are only to illustrate the principles of the present invention. Without departing from the scope of the principle of the present invention, there will be various changes and improvements in the present invention, and these changes and improvements all fall within the protection scope of the present invention.

Claims (1)

1. a polluted water body in-situ restorative procedure, it is characterized in that concrete steps are as follows: be first fixed in polluted-water by polluted water body in-situ prosthetic device, the water level in microbial reaction case is controlled by automatic water inlet valve, when the water level in microbial reaction case lower than automatic water inlet valve during desired location automatically open start water inlet, when the water level in microbial reaction case closes stopping water inlet automatically higher than automatic water inlet valve during desired location, aeration phase is entered when the water level in microbial reaction case reaches setting height, blower fan is automatically opened and is carried out aeration, precipitate phase is entered after aeration 3-8h, after precipitation 0.5-2h, beginning draining opened automatically by wet-pit, wet-pit stops by setting liquid automatic control, when liquid level reaches desired location, wet-pit is out of service, then automatic water inlet valve is automatically opened and is started water inlet, enter next circulation, described polluted water body in-situ prosthetic device comprises microbe treatment system and is arranged at the phytoremediation system above microbe treatment system, wherein microbe treatment system is primarily of microbial reaction case, flotation tank, wet-pit, floating stuffing, airduct, blower fan, aeration head and automatic water inlet valve composition, described flotation tank is fixed on around microbial reaction case outside top by tripod, wet-pit is fixed on flotation tank, the water-in of wet-pit is connected with the water shoot extend in microbial reaction case, the water outlet of wet-pit communicates with the external world, floating stuffing is suspended in the water in microbial reaction case, airduct is layed in the bottom of whole microbial reaction case, the outer end of airduct is connected with the fan outlet be arranged on flotation tank, described blower fan and wet-pit are connected with the cable of outside respectively, aeration head is fixed on the airduct bottom microbial reaction case, automatic water inlet valve is arranged at the bottom of microbial reaction case, this automatic water inlet valve comprises valve body and the water inlet pipe be arranged on valve body and rising pipe, wherein water inlet pipe communicates with the external world, rising pipe is connected with microbial reaction case, described phytoremediation system comprises plant immovable bed and is fixed on the function plant on plant immovable bed, wherein plant immovable bed is fixed on 1/4th places of microbial reaction upper box part by tripod, plant immovable bed is primarily of perforated plastic plate and the pebbles be distributed in above perforated plastic plate, sandstone, peat or rock wool composition, described function plant is fixed on plant immovable bed, and this function plant is one or more in reed, Canna generalis Bailey, Herba Eichhorniae or Medulla Junci.