CN110759490A - Micro-nano aeration biological contact oxidation water body purification method and device - Google Patents
Micro-nano aeration biological contact oxidation water body purification method and device Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/308—Biological phosphorus removal
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/78—Details relating to ozone treatment devices
- C02F2201/782—Ozone generators
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/78—Details relating to ozone treatment devices
- C02F2201/784—Diffusers or nozzles for ozonation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/14—NH3-N
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2209/16—Total nitrogen (tkN-N)
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- C02F2303/02—Odour removal or prevention of malodour
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention relates to a method and a device for purifying an ozone micro-nano aeration biological contact oxidation water body, which consists of a micro-nano aeration machine, an ozone generator, a control system, a gas transmission and distribution system and a biological carrier. According to the invention, the ammonia nitrogen removal rate in the water body is 30-70%, the TP removal rate is 25-40%, the COD removal rate is 50-80%, and the algae removal rate is more than 85%. The invention is suitable for landscape water body, lake and river treatment and water ecosystem restoration, and is an energy-saving and efficient water body restoration technology.
Description
Technical Field
The invention belongs to the technical field of environmental engineering, relates to a water quality purification and water ecological restoration technology, in particular to a method for purifying and restoring water quality of urban landscape water bodies, lakes, riverways and the like, and more particularly relates to a method and a device for purifying water bodies by ozone micro-nano aeration biological contact oxidation.
Background
With the continuous acceleration of the pace of ecological civilization construction and the continuous improvement of the requirements of the public on the quality of the ecological environment, the problem that the water environment quality does not reach the standard becomes urgent to solve. The problems of unbalanced ecological systems of river channels, lakes and landscape water bodies, poor water body self-purification capacity, serious exogenous pollution and the like are prominent, so that the outbreak of algae in the water bodies is caused, the water quality is deteriorated, the taste sense and the smell sense are deteriorated, the dissolved oxygen is exhausted, the transparency is reduced, the fishery production is reduced, a channel is blocked, the toxicity is generated to people and animals, and the ecological landscape function of the water bodies is lost, therefore, the method has important significance for adopting effective measures to inhibit the growth of the algae, improving the water quality of the water bodies of the lakes, the lakes and the landscape water bodies, ensuring the water conservancy safety of regions and creating a water environment harmonious with.
The water pollution indexes of lake, river and landscape water body include COD (chemical oxygen demand) and NH3The water quality improvement method comprises the steps of-N (ammonia nitrogen), TN (total nitrogen) and TP (total phosphorus), wherein the water quality improvement step is to ensure that the water quality indexes reach the standard, control the growth of algae and the like, and keep the water clear and clean and even the communication flow of the whole water system, so that a good water ecological environment can be constructed. At present, methods applied to natural and landscape water body treatment are numerous, including physical methods, chemical methods, biological methods and the like. Wherein the physical method is to separate suspended pollutants in the polluted water body by using physical action, such as gravity separation, air flotation, reverse osmosis, centrifugal separation, evaporation and the like; chemical methods are those using chemical reactionsSeparating, converting, destroying or recovering pollutants in the polluted water body and converting the pollutants into harmless substances, such as coagulation, neutralization, oxidation reduction, adsorption, electrodialysis, steam stripping, extraction and other processes, wherein the main application of a chemical method in the landscape water body comprises coagulation precipitation, a chemical agent algae killing method and the like; the biological method mainly comprises the methods of biological contact oxidation, a land treatment system, an artificial wetland, microbial agent addition and the like. The technology is applied to water purification and ecological restoration of urban landscape water bodies at home and abroad, and has good effects in production and application, but has the problems of high power consumption, high operating cost, high secondary pollution risk and the like.
The ozone micro-nano aeration biological contact oxidation water body purification technology has the advantages that the purification process of pollutants in a water body is a comprehensive result of various physical, chemical and biological effects, and the recovery of water ecology is realized by absorbing the pollutants, improving the self-purification capacity of the water body and perfecting the ecological chain of the water area. The micro-nano aeration improves the content of dissolved oxygen in water, promotes the growth of microorganisms, eliminates organic pollutants in bottom mud and improves the self-purification capacity of water; the micro-concentration ozone aeration has strong oxidizing property and can quickly kill algae, and the micro-concentration ozone aeration can quickly eliminate the black and odorous water body and the eutrophication water body when being used for the initial treatment; the biological carrier filler has good effects of blocking, filtering, precipitating and purifying suspended matters in water, a complex ecological system consisting of a plurality of nutrition levels such as bacteria, fungi, algae, protozoa, metazoan and the like is formed by a large number of microorganisms (biomembranes) growing on the carrier in the longitudinal direction, and intermittent aeration is reasonably arranged along the flowing direction of the water in the transverse direction, so that a suspended aerobic type, an attached facultative type and an attached anaerobic type microbial system with various different activities, breathing types and nutrition types are formed, the region is a functional main body for decomposing and converting pollutants, the water microbial system and aquatic animals and plants jointly form a complex ecological chain (food chain), and the rapid and efficient purification effect on pollutants in the water is realized. The ozone micro-nano aeration biological contact oxidation water body purification device is high in host integration and bank edge, simple in structure in gas transmission and distribution system form, convenient to install, capable of selecting pipes according to water bodies and bank environments, suitable for complex and variable hydrodynamic conditions of river water bodies, and not prone to blockage of aeration holes. According to the water quality condition and the purification requirement of the water body, the density of the aeration pipes and the density of the biological carriers can be randomly increased and decreased, and the aeration pipes and the biological carriers can be flexibly arranged in river channels, lakes and landscape water bodies. The biological carrier system can provide sheltering, inhabitation, bait and spawning sites for aquatic animals, and forms a virtuous cycle water area chain with water microorganisms.
Disclosure of Invention
The invention aims to solve the problem of water ecology, overcome the defects and shortcomings of the existing method for treating water bodies in lakes, rivers and landscapes, and provide a method and a device for purifying water bodies by ozone micro-nano aeration biological contact oxidation. It can effectively reduce COD (chemical oxygen demand) and NH in water3The index concentration of pollutants such as-N (ammonia nitrogen), TN (total nitrogen), TP (total phosphorus) and the like can be used for quickly eliminating the black and odorous phenomenon of the water body at the early stage of treatment, killing and controlling the growth of algae. In order to achieve the purpose, the invention provides the following technical scheme:
an ozone micro-nano aeration biological contact oxidation water body purification method and a device thereof are characterized in that the device is composed of a micro-nano aerator 1, an ozone generator 2, a control system 3, a microorganism carrier 8, a gas transmission main pipe 5, a gas transmission branch pipe 6 and a gas distribution pipe 7; the micro-nano aerator 1 is an integrated equipment box, a bubble generator, a dissolved air tank, a water pump and a gas transmission pipeline are arranged in the micro-nano aerator, the box body is of a cubic structure, opening doors are arranged at the front and the back of the box body, debugging and maintenance are convenient, the bottom plate of the equipment box needs to be fixed on an equipment foundation, and a preformed hole at the upper part of the equipment box is connected with a gas inlet pipeline 4; the gas inlet pipeline 4 is provided with a valve and a tee joint, and other required gases of oxygen can be accessed through the tee joint by closing the valve at the end of the ozone generator 2; the ozone generator 2 is an integrated device, and can adjust the ozone generation rate through the control system 3) so as to control the concentration of the ozone in the air intake of the micro-nano aerator 1; the control system 3 belongs to integrated equipment, is connected with the micro-nano aerator 1 and the ozone generator 2 through a circuit, and realizes the control of the system by controlling the input current and voltage, so that gas-water mixed liquid with reasonable components and concentration enters the gas transmission branch pipe 6 through the gas transmission main pipe 5 and finally enters a water body through the uniform gas distribution pipe 7; the gas transmission and distribution system is composed of the gas transmission main pipe 5, the gas transmission branch pipe 6 and the gas distribution pipe 7, the pipe diameter is gradually reduced along the gas flowing direction, and the tail gas distribution pipe is arranged on the gas distribution base 9; the gas distribution base is composed of a concrete base and a steel frame, the steel frame is vertically embedded in the concrete base, a pipe hoop with adjustable height is arranged on the upper section of the steel frame, the pipe hoop is used for fixing the gas distribution pipe 7, and aeration holes 10 are uniformly formed in the gas distribution pipe; the aperture of the aeration hole is 1-10mm, and the direction of the aperture of the aeration hole can be set according to the requirement; the gas distribution pipe 7 can be provided with a microorganism carrier 8; the microbial carrier is a polypropylene biological rope, and the microbial carrier 8 is arranged on the gas distribution pipe in a tow shape.
The air inlet pipe 4 is provided with a valve and a tee joint, wherein the tee joint is provided with a valve close to the ozone generator, and the inlet of the tee joint is provided with a standard gas flowmeter reducing valve.
The ozone generator 2 of the invention is a method for controlling the ozone aeration concentration by controlling the ozone generation rate, the ozone aeration concentration and the aeration duration are determined according to the water quality condition of the water body, and trace ozone can play a role in decoloring, deodorizing, sterilizing, killing algae, removing toxic substances such as iron, manganese, cyanide, phenols, nitrogen dioxide, sulfur dioxide and the like, reducing COD (chemical oxygen demand), BOD (biochemical oxygen demand) and the like.
According to the gas transmission and distribution system, the gas transmission main pipe 5, the gas transmission branch pipe 6 and the gas distribution pipe 7 can be made of stainless steel pipes, PVC pipes, seamless steel pipes, PU (polyurethane) hoses and other pipes according to the water environment.
The concrete base and the steel frame are characterized in that the bottom surface of the concrete base is not less than 40 x 40cm, the thickness of the concrete base is not less than 10cm, hydraulic concrete is selected for pouring, a vertical rod of the steel frame is not less than 8mm in diameter and made of a stainless steel or carbon steel belt anticorrosive coating, a pipe hoop is fixed on the upper section of the vertical rod through a double-screw sleeve, and the height of the pipe hoop is adjusted through a sleeve screw.
The aperture of the aeration hole is determined according to the depth of a water body and the water quality, the opening direction of the aeration hole can be determined according to the water body condition, the aeration hole can be selected to perform downward aeration when the sediment pollutants need to be treated to solve the problem of endogenous pollution, and the simultaneous treatment of the sediment and the water body can be realized by adjusting the aeration angle.
The biological carrier 8 of the invention is composed of a plurality of filamentous biological fillers arranged on the gas distribution pipe 7. The installation position is reserved on the gas distribution pipe, the lower end of the biological carrier filament bundle is connected with a pipe hoop on the gas distribution pipe, the upper section of the filament bundle vertically floats by the buoyancy of a water body, microorganisms in the underwater activated sludge float and rise under the disturbance of micro-nano bubbles and can quickly hang a film on the filamentous carrier, and the microorganisms float and separate and absorb organic pollutants in the water body along with water flow on the biological carrier. The gas distribution pipe 7 and the biological carrier 8 form a whole in the water body, and the whole can provide places for predation, inhabitation and reproduction of aquatic animals such as fish and the like while promoting growth and reproduction of microorganisms in the water body.
The application method of the water body purification device is characterized in that the micro-nano aerator 1, the ozone generator 2 and the control system 3 are installed in a shoreside equipment room in a centralized mode during implementation, the air distribution pipe 7 and the biological carrier 8 are installed below the water surface of a water body, the installation height of the air distribution pipe 7 is 10-30 cm from the water bottom, the length of the biological carrier 8 is determined according to the water depth, and the upper end of the biological carrier is 30-50 cm from the water surface. The method is characterized in that algae in the water body are killed within one week through ozone aeration, the black and odor phenomenon can be basically eliminated, dissolved oxygen in the water body can be maintained at more than 10mg/l after 1-3 months of micro-nano aeration and biofilm culture, meanwhile, the system can exert strong pollutant removal capacity, and through monitoring, the removal rate of ammonia nitrogen in the water body is 30-70%, the removal rate of TP is 25-40%, the removal rate of COD is 50-80%, and the removal rate of algae is more than 85%.
The invention mainly solves the problem that COD, BOD, ammonia nitrogen and total phosphorus pollutants in the landscape water body exceed the standard, mainly inspects the purification effect of the combination application of ozone, micro-nano aeration and biological fillers, and has the main difficulty that the oxygen supply efficiency of the biomembrane is effectively improved by accurately controlling the concentration of the ozone and the micro-nano aeration.
The design of combining the ozone micro-nano aeration with the microbial carrier provided by the invention has the advantages that the ozone micro-nano aeration integrated equipment room is arranged on the bank side, and the floor area is generally not more than 20m2The aeration pipeline is communicated to the water bottom, the water bottom aeration pipeline and the microorganism carrier filler IThe biological carrier filler is filament-shaped, the length of the biological carrier filler is determined according to the water body, and the biological carrier filler is arranged below the water surface. The system has small combination floor area, strong applicability, low energy consumption and high stability (drift resistance, overturn resistance and sink resistance); the ozone micro-nano aeration is combined with the microorganism carrier, so that a good aquatic environment can be constructed for water microorganisms, sufficient oxygen and activity space are provided for various aquatic animals, and the aquatic animals such as fishes filter and eat protozoa, swallow organic particles and small benthonic animals in the filamentous filler, so that the effects of prolonging food chains and decomposing organic matters are achieved. The fishes and other aquatic animals shuttle among the biological carrier fillers to promote the exchange of dissolved oxygen and nutrient substances of the substances in the water body. The micro-nano bubbles rise slowly, stay in the water for a long time, and various physical and chemical reactions such as dissolution, mass transfer, energy release and the like exist on the gas-water interface, so that pollutants in the water are degraded. The aeration gap is reasonably arranged, so that aerobic and anoxic environments exist in the water body, nitrification and denitrification can be simultaneously carried out in different spaces, the total nitrogen in the sewage can be favorably removed, meanwhile, the filler can effectively remove the phosphorus in the sewage, and the total phosphorus concentration in the effluent is also reduced.
The invention has the beneficial effects that:
(1) the ozone micro-nano aeration biological contact oxidation water body purification device can control the removal rate of pollutants according to the needs, has low equipment cost, simple and convenient installation and low operation cost, can effectively remove the pollutants such as nitrogen, phosphorus and the like in sewage, control the growth of algae in the water body, eliminate black and odor and restore the ecological systems of urban landscape water bodies, river channels and lakes.
(2) By adopting the purification system device, algae in the water body can be killed within one week through ozone aeration, the black and odorous phenomenon can be basically eliminated, dissolved oxygen in the water body can be maintained at more than 10mg/l after 1-3 months of micro-nano aeration and biofilm culture, meanwhile, the system can exert stronger pollutant removal capacity, and through monitoring, the removal rate of ammonia nitrogen in the water body by the system is 30-70%, the removal rate of TP is 25-40%, the removal rate of COD is 50-80%, and the removal rate of algae is more than 85%.
Drawings
FIG. 1 is a general schematic diagram of an ozone micro-nano aeration biological contact oxidation device of the present invention;
FIG. 2 is a schematic view of the installation of the biological filler and the gas distribution pipe of the present invention;
1 is a micro-nano aerator, 2 is an ozone generator, 3 is a control system, 4 is an air inlet pipeline,
5 is a main gas transmission pipe, 6 is a branch gas transmission pipe, 7 is a gas distribution pipe, 8 is a biological carrier,
9 is an air distribution base, and 10 is an aeration hole.
Detailed Description
The invention is described below by means of specific embodiments. Unless otherwise specified, the technical means used in the present invention are well known to those skilled in the art. In addition, the embodiments should be considered illustrative, and not restrictive, of the scope of the invention, which is defined solely by the claims. It will be apparent to those skilled in the art that various changes or modifications in the components and amounts of the materials used in these embodiments can be made without departing from the spirit and scope of the invention. The raw materials (commercially available polypropylene bio-ropes) and reagents used in the present invention are commercially available.
Example 1
Manufacturing and using method of ozone micro-nano aeration biological contact oxidation water body purification device
The manufacturing process of the purification device comprises the following steps:
the ozone micro-nano aeration biological contact oxidation water body purification device is composed of a micro-nano aerator 1, an oxygen generator 2, a control system 3, a microorganism carrier 8, a gas transmission main pipe 5, a gas transmission branch pipe 6 and a gas distribution pipe 7; micro-nano aeration machine 1, ozone generator 2, control system 3 install in the bank side equipment room in concentrated, on each equipment bottom plate need be fixed in the equipment foundation, the equipment power is followed the cable pit and is inserted, ozone generator 2 dissolves the gas pitcher intercommunication in with micro-nano aeration machine 1 through admission line 4, admission line 4 install valve and tee bend. The equipment room is provided with a hole to connect a gas transmission main pipe 5 to be communicated with a gas transmission branch pipe 6, the gas transmission branch pipe is arranged along the bank of a river and extends to the bottom of the river through a tee joint, a valve is arranged at the joint of the tee joint of the bank of the river, the gas transmission branch pipe 6 is communicated with a gas distribution pipe 7 after being introduced into the bottom of the river, the gas transmission main pipe 5, the gas transmission branch pipe 6 and the gas distribution pipe 7 jointly form a gas transmission and distribution system, a tail gas distribution pipe is arranged on a gas distribution base 9, the gas distribution base is composed of a concrete base and a steel frame, the upper section of the steel frame is provided with a pipe hoop with adjustable height, the gas distribution pipe 7 is fixed on the gas distribution base through. And finally, installing a microorganism carrier on the gas distribution pipe 7, wherein the microorganism carrier (8) is a polypropylene biological rope, and the lower end of the filament bundle is connected with the upper pipe hoop of the gas distribution pipe.
The air inlet pipe 4 is provided with a valve and a tee joint, wherein the tee joint is provided with a valve near the ozone generator end, and the inlet of the tee joint is provided with a standard gas flowmeter pressure reducing valve. The materials of the main gas transmission pipe 5, the branch gas transmission pipe 6 and the gas distribution pipe 7 in the gas transmission and gas distribution system can be selected from stainless steel pipes, PVC pipes, seamless steel pipes, PU hoses and other pipes according to the water environment, and the pipes are installed and connected according to the characteristics of various pipes. The bottom surface of a concrete base in the gas distribution base 9 is not less than 40 x 40cm, the thickness is not less than 10cm, hydraulic concrete is selected for pouring, the diameter of a steel frame upright rod is not less than 8mm, the material of the steel frame upright rod is a stainless steel or carbon steel belt anticorrosive coating, and the upright rod is embedded in the concrete base.
When the device is implemented, the micro-nano aerator 1, the ozone generator 2 and the control system 3 are installed in a shoreside equipment room in a centralized mode, the air distribution pipe 7 and the biological carrier 8 are installed below the water surface of a water body, wherein the installation height of the air distribution pipe 7 is 20cm from the water bottom, the length of the biological carrier 8 is determined according to the water depth, and the upper end of the biological carrier is 30cm from the water surface. The ozone aeration is carried out for one week to kill algae in the water body and basically eliminate black and odorous phenomena, after 2 months of micro-nano aeration and biofilm culture, dissolved oxygen in the water body can be maintained to be more than 10mg/l, meanwhile, the system can exert stronger pollutant removal capacity, and the system has the advantages that the ammonia nitrogen removal rate of 70 percent, the TP removal rate of 40 percent, the COD removal rate of 80 percent and the algae removal rate of more than 85 percent through monitoring.
Example 2
Install the micro-nano aeration biomembrane integration equipment of ozone in certain park landscape lake, aeration pipe mounting height is: the distance between the aeration pipes and the water bottom is 20cm, and the distance between the aeration pipes and the water bottom is 8 meters; the suspended biological film filler bin and the aeration pipe are arranged above the aeration pipe in parallel and are anchored by a nylon anchoring rope on the bank side.
The project is managed by park operation and maintenance company, no self-control program is set, aeration is manually started for 8 hours every day, the transparency of the water body is obviously increased after the operation for one week and reaches more than 25cm, the content of dissolved oxygen in the water body is obviously increased and can be stably maintained at more than 3mg/L, the biofilm formation of the microbial carriers is good after the operation for 1 month, the microbial metabolism of the water body is obviously increased, indexes such as COD, BOD, ammonia nitrogen and the like in the water body basically reach the V-type standard of surface water environmental quality standard (GB 3838-2002), after the continuous operation for 2 months, the transparency of the water body is more than 50cm, the water area is close to 1m, and the water quality continuously and stably reaches the V-type standard of surface water environmental quality standard (GB 3838-. The black-hand phenomenon is completely eliminated, and the green alga outbreak phenomenon does not occur during the operation of the equipment.
Example 3
The results of water quality detection in the first three months of river course treatment for certain inferior V-class water quality are shown in the table
A set of ozone micro-nano aeration biomembrane integrated equipment is installed on the bank on the left side of a river channel, a PLC automatic control system and a remote wireless digital signal transmission system are arranged, remote control is achieved, the width of the river channel is 25m on average, the length of an aeration range is 200m, an air distribution pipe is installed in the direction perpendicular to the river channel, the installation interval is 10m, the installation height is 20cm, a microorganism carrier is installed above an aeration pipe, the concentration of dissolved oxygen in a water body is obviously increased after 1 month of operation, the water quality is continuously improved, the water reaches the V-type level of the surface water environmental quality standard (GB 3838-2002) after 2 months, and the water quality is close to the IV-type level of the surface water environmental quality standard (GB 3838-2002) after 3 months. The equipment is set to operate for 8 hours every day, and intermittently operates in three periods of morning, afternoon and night, during which the river channel is affected by upstream water body pollution, green algae are erupted due to water body eutrophication, and the operating personnel starts the ozone algae removal program after finding in time, and thoroughly eliminates the green algae after intermittent micro ozone aeration for one week. The following table shows the measured removal rate of the equipment operating on the main pollutant indicators.
Example 4
A set of ozone micro-nano aeration system is installed in a certain fishpond, the circuit is manually controlled, aeration pipelines are uniformly arranged in the fishpond, the distance is 8m, the installation height is 10cm, and a microorganism carrier is installed above the air distribution pipe. According to the water quality condition of the initial fishpond, a lower ozone concentration is set for aeration, aeration is carried out for 8 hours every day, organic pollutants and germs in the water body are effectively killed after continuous aeration for one week, the ozone concentration is continuously reduced in the second week, the dissolved oxygen of the water body is maintained to be more than 3mg/L after continuous aeration for one week, the indexes of main pollutants such as COD, BOD, ammonia nitrogen, total phosphorus and the like in the water body are obviously reduced, the transparency is increased, the fish grows well, and the in-situ purification of the water body of the fishpond is basically realized.
Claims (8)
1. An ozone micro-nano aeration biological contact oxidation water body purification device is characterized by comprising a micro-nano aerator (1), an ozone generator (2), a control system (3), a microorganism carrier (8), a gas transmission main pipe (5), a gas transmission branch pipe (6) and a gas distribution pipe (7); the micro-nano aerator (1) is an integrated equipment box, a bubble generator, a dissolved air tank, a water pump and a gas transmission pipeline are arranged in the micro-nano aerator, the box body is of a cubic structure, opening doors are arranged at the front and the back of the box body, debugging and maintenance are convenient, the bottom plate of the equipment box needs to be fixed on the basis of the equipment, and a preformed hole at the upper part of the equipment box is connected with a gas inlet pipeline (4); the gas inlet pipeline (4) is provided with a valve and a tee joint, and oxygen and other required gases are accessed through the tee joint by closing the valve at the end of the ozone generator (2); the ozone generator (2) is an integrated device, and the ozone generation rate is adjusted through the control system (3), so that the concentration of the ozone in the air intake of the micro-nano aerator (1) is controlled; the control system (3) belongs to integrated equipment, is connected with the micro-nano aerator (1) and the ozone generator (2) through a circuit, and realizes the control of the system by controlling the input current and voltage, so that gas-water mixed liquid with reasonable components and concentration enters the gas transmission branch pipe (6) through the gas transmission main pipe (5) and finally enters a water body through the gas distribution pipe (7); the gas transmission and distribution system is composed of the gas transmission main pipe (5), the gas transmission branch pipe (6) and the gas distribution pipe (7), the pipe diameter is gradually reduced along the gas flowing direction, and the tail gas distribution pipe is arranged on the gas distribution base (9); the gas distribution base (9) is composed of a concrete base and a steel frame, the steel frame is vertically pre-buried in the concrete base, a pipe hoop with adjustable height is arranged on the upper section of the steel frame and used for fixing the gas distribution pipe (7), and aeration holes (10) are uniformly formed in the gas distribution pipe (7); the aperture of the aeration hole is 1-10mm, and the direction of the aperture of the aeration hole can be set according to the requirement; the gas distribution pipe (7) can be provided with a microorganism carrier (8); the microbial carrier (8) is a polypropylene biological rope, and the microbial carrier (8) is arranged on the gas distribution pipe in a tow shape.
2. The ozone micro-nano aeration biological contact oxidation water purification device according to claim 1, characterized in that the air inlet pipe (4) is provided with a valve and a tee joint, wherein the tee joint is provided with a valve near the ozone generator end, and the inlet of the tee joint is provided with a standard gas flowmeter pressure reducing valve.
3. The ozone micro-nano aeration biological contact oxidation water purification device according to claim 1, characterized in that the ozone generator (2), wherein the ozone generation rate is controlled by the method for controlling the ozone aeration concentration, the ozone aeration concentration and the aeration duration are determined according to the water quality condition of the water body, and the trace ozone can play a role in decoloring, deodorizing, sterilizing and algae removal, removing toxic substances such as iron, manganese, cyanide, phenols, nitrogen dioxide, sulfur dioxide and the like, and reducing COD, BOD and the like.
4. The ozone micro-nano aeration biological contact oxidation water purification device according to claim 1, wherein the materials of the gas transmission main pipe (5), the gas transmission branch pipe (6) and the gas distribution pipe (7) can be stainless steel pipes, PVC pipes, seamless steel pipes and PU hose pipes according to the water environment.
5. The ozone micro-nano aeration biological contact oxidation water purification device according to claim 1, characterized in that the concrete base and the steel frame are poured by hydraulic concrete, wherein the bottom surface of the concrete base is 40 x 40cm, the thickness of the concrete base is 10cm, the diameter of the vertical rod of the steel frame is 8mm, the material of the vertical rod is a stainless steel or carbon steel strip anticorrosive coating, the upper section of the vertical rod is fixed with a pipe hoop by a double-screw sleeve, and the height of the pipe hoop is adjusted by a sleeve screw.
6. The ozone micro-nano aeration biological contact oxidation water purification device according to claim 1, characterized in that the diameter of the aeration holes is determined according to the depth of the water and the water quality, the opening direction of the aeration holes can be determined according to the water condition, the aeration holes can be selected to be aerated downwards when the sediment pollutants need to be treated to solve the problem of endogenous pollution, and the simultaneous treatment of the sediment and the water is realized by adjusting the aeration angle.
7. The ozone micro-nano aeration biological contact oxidation water body purification device according to claim 1, characterized in that the biological carrier (8) is composed of a plurality of filamentous biological fillers arranged on a gas distribution pipe (7); the installation position is reserved on the air distribution pipe (7), the lower end of the biological carrier tow is connected with a pipe hoop on the air distribution pipe (7), the upper section of the tow vertically floats by the buoyancy of a water body, microorganisms in the underwater activated sludge float and rise under the disturbance of micro-nano bubbles and can quickly hang a membrane on the filamentous carrier, and the microorganisms float and desorb organic pollutants in the water body along with water flow on the biological carrier; the gas distribution pipe (7) and the biological carrier (8) form a whole in the water body, and the whole can provide places for predation, inhabitation and reproduction of aquatic animals such as fish and the like while promoting growth and reproduction of microorganisms in the water body.
8. The use method of the ozone micro-nano aeration biological contact oxidation water body purification device disclosed by claim 1 is characterized in that the micro-nano aeration machine (1), the ozone generator (2) and the control system (3) are installed at the shore in a centralized manner, the air distribution pipe (7) and the biological carrier (8) are installed below the water surface of the water body, wherein the installation height of the air distribution pipe (7) is 10-30 cm from the water bottom, the length of the biological carrier (8) is determined according to the water depth, and the upper end of the biological carrier is 30-50 cm from the water surface; the method is characterized in that algae in the water body are killed and the black and odorous phenomenon is basically eliminated within one week of ozone aeration, dissolved oxygen in the water body can be maintained at 10mg/l after 1-3 months of micro-nano aeration and biofilm culture, meanwhile, the system can exert strong pollutant removal capacity, and through monitoring, the removal rate of ammonia nitrogen in the water body is 30-70%, the removal rate of TP is 25-40%, the removal rate of COD is 50-80%, and the removal rate of algae is 85-95%.
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| CN111320284A (en) * | 2020-03-25 | 2020-06-23 | 天津市环境保护科学研究院 | System and method for ecologically restoring water body in river/lake reservoir |
| CN111533282A (en) * | 2020-05-12 | 2020-08-14 | 上海市政工程设计研究总院（集团）有限公司 | Dredging and purifying method for drainage pipe and canal |
| CN111943370A (en) * | 2020-08-07 | 2020-11-17 | 常州环保科技开发推广中心 | Method for installing micro-nano aeration equipment |
| CN112939383A (en) * | 2021-05-06 | 2021-06-11 | 浙江大学 | Algae removal water purification device combining ozone and aeration |
| CN113880260A (en) * | 2021-11-09 | 2022-01-04 | 众心通慧(厦门)生态环保科技有限公司 | High-efficient adjustable water ecological remediation device |
| CN114835334A (en) * | 2022-03-18 | 2022-08-02 | 无锡千为科技有限公司 | Strong micro-nano biological water purification system |
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