KR101204395B1 - The apparatus to treat municipal and industrial wastewater - Google Patents

Abstract

The present invention provides sludge and fluidized bed carriers with sludge and fluidized bed carriers for treatment of sewage or wastewater containing or without surfactants, and aeration from the bottom of the reactor to form sludge or biofilm fluidized bed and top and bottom of the reactor. The reactor treated water is discharged at the boundary of the wastewater to perform advanced treatment such as the removal of organic and inorganic wastewater and nitrogen removal, and the surfactant dissolved in the wastewater or in the micelle form is transferred to the interface between the air and the wastewater of air or oxygen bubble. In addition, as the dissolved contaminant and the like rise together with the bubble, the surfactant and the dissolved contaminant are oxidized without separate secondary treatment of the bubbles generated in the upper surface of the reactor required in the prior art and separate and collected bubbles from the reactor. Or decomposed and residual organics at the bottom of the reactor Performing the water and the inorganic oxide or decomposition treatment of, and the concentration of pollutants, including the surface active agent from the surface of the water when the aeration tank of the conventional sewage treatment plants is greater than water, the reaction vessel The present invention relates to a wastewater treatment method and a reactor apparatus to improve the inefficiency of wastewater treatment because the treated water is transferred to the next process due to overflow in the water surface .

Description

The apparatus to treat municipal and industrial wastewater

Representative cases of sewage and wastewater containing surfactants are synthetic dye wastewater discharged from the dyeing complex. The textile / dye processing industry is a labor-intensive industry compared to other industries, and the unit workplace is relatively small and medium. Therefore, there are many places where the basic infrastructure and wastewater treatment facilities of the unit workplace are very poor to support the production. To solve this problem, most dyeing and processing sites form one industrial complex and comprehensively treat the wastewater in the industrial complex. Therefore, in general, synthetic dyeing wastewater is a wastewater mixed with all kinds of wastewater discharged from the dyeing process. In other words, it is a mixed wastewater such as dyeing wastewater, weight loss wastewater, decanting, refining wastewater, etc. It contains not only various dyes but also surfactants, bleaches, salts, PVA, alkali, TPA (Terephthalic acid) -2Na salt and EG ( Ethylene Glycol) is contained in a large amount, and among them, surfactants make up a large part of BOD and COD of synthetic dye wastewater.

In the present invention, sludge and fluidized bed carriers are filled with sludge and fluidized bed carriers and aeration from the bottom of the reactor for the treatment of wastewater containing surfactants or sewage or non-surfactants, such as synthetic wastewater, The reactor treated water is discharged at the upper and lower boundary of the reactor to perform advanced treatment such as removal of organic and inorganic waste from wastewater and nitrogen, and surfactants dissolved in the wastewater or in the form of micelles are air or oxygen bubbles. As a result of the transition to the interface between air and sewage water and also the rise of dissolved pollutants and the like together with the bubble, a separate secondary for the separation and separation of the bubbles generated on the upper surface of the reactor required by the prior art at the top of the reactor is separated and collected. surface active agent and the dissolved contaminants are oxidized or decomposed without being processed In the bottom of the reactor, to a method for performing residual organic and inorganic oxidation or decomposition and treatment of the reactor apparatus.

Korean Patent Registration No. 163659 is a mixture of a surface active agent and a catcher, which artificially generates fine micro bubbles in a bubble generator, and continuously supplies these micro bubbles to a sewage treatment system, so that impurities and micro bubbles in the sewage water It is a technology that treats solids in sewage water by physically and chemically ionizing and forcibly separating them from the surface of sewage water in a single flotation tank. Similarly, U.S. Patent No. 4,203,837 discloses a method for removing suspended solids and dissolved substances in sewage using microbubbles prepared by using artificially surfactants.

On the other hand, Published Patent Publication No. 2003-0024455 is similar to Korean Patent Registration No. 163659, which generates microbubbles with only surfactant and supplies them to the wastewater, and sequentially passes the wastewater and microbubbles to several independent flotation tanks and discards them. It relates to a technology for treating sewage water by collecting as a collecting device. In addition, Patent Publication No. 2002-0005864 discloses bubbles in contaminated water systems such as contaminated lakes and streams, and separates bubbles into U-shaped waterways or baffles, and transfers the separated bubbles to sewage treatment plants. The present invention relates to a method and apparatus for purifying a contaminated water system such as a contaminated lake and a river by a biofilm. Prior arts listed so far are used to separate and disperse bubbles containing surfactants and the like. Collecting device, such as a U with a separate collecting or baffle Hung Segregated There is a possibility of secondary pollution due to the disposal of cloth and additional equipment for secondary treatment is required .

The aeration by traditionally been activated sludge process by microorganisms to be employed in the aerated sewage treatment plant installed in existing The reaction vessel is typically aerated by the surface active agent dissolved in the wastewater are concentrated on the bubble source concentration including a surfactant from the surface of the water because the injury to the surface is greater than water, the reaction vessel Wastewater treatment efficiency is inefficient because the treated water is transferred to the next process due to overflow from the surface .

The prior art separates and collects bubbles containing surfactants with a waste trap collecting device, a U-water canal or a baffle, but there is a possibility of secondary pollution due to the collected waste waste. Equipment is required . On the other hand , conventionally installed aeration reactors by the activated sludge method of microbial aeration, which has been traditionally adopted in sewage treatment plants, generally use surfactants in the water because surfactants dissolved in the wastewater due to aeration are concentrated in bubbles and float to the surface. Wastewater treatment efficiency is inefficient because the pollutant concentrations included are larger than underwater and the treated water is transferred to the next process due to overflow from the surface . In addition, traditional aeration reaction tank surfactant for capture of bubbles additional facility is not only required for a collecting device and a secondary treatment of the surface active agent foam, conventional aeration tank occurs on the surface on an existing installation is a bubble portion vertically within the reaction tank On the other hand, the wastewater stream is treated horizontally, so the water surface occupies a large area. Therefore, the installation cost is high and it is very difficult to collect and treat the surfactant foam of the surfactant foam generated on the water surface.

The present invention is to treat sewage and wastewater that contains or does not contain a surfactant that occupies a part of sewage BOD and COD, and when surfactant is not contained , a surfactant is added to the sewage raw water, and the sewage raw water is Reactor treated water is discharged from the upper and lower boundary of the reactor as it enters the bottom and the wastewater stream is treated as an upflow. Surfactant bubbles are generated and accumulated on the surface of the reactor top as air or oxygen bubbles rise from the bottom of the reactor, and these accumulated bubbles are broken up by a plurality of screens having small openings, and the resulting liquid containing the surfactant is repeated. As the enemy descends due to the self-surfacing surfactant bubble weight and descends to the upper surface of the reactor, the redissolved surfactant is oxidized or decomposed at the top of the reactor. Therefore , the concentration of the reactor treated water at the upper and lower boundary of the reactor from which the reactor treated water is discharged is smaller than the concentration of the upper surface of the reactor. As described above, the present invention oxidizes the dissolved pollutant floating with the re-dissolved surfactant and the bubble at the top of the reactor , without separate secondary treatment of the bubbles generated on the upper surface of the reactor and the separate collected bubbles required in the prior art. Or decomposing treatment, while the lower part of the reactor performs oxidation or decomposition treatment of residual organic and inorganic substances, and discharges the reactor treated water having the minimum pollution concentration from the wastewater contaminant concentration distribution with respect to the reactor height from the reactor treated water outlet and passes through the mooring tank. An efficient sewage treatment method and a reactor apparatus are provided.

The effect of the present invention is to treat the sewage waste water using the surfactant , without the separate collection of the bubbles generated on the water surface of the reactor required in the prior art and separate secondary treatment for the separated collected bubbles, floating together with the surfactant and bubbles One dissolved source is oxidized or decomposed at the top of the reactor, while the bottom of the reactor is subjected to the oxidation or decomposition of residual organics and inorganics so that at the reactor treated water outlet located at the boundary of the top and bottom of the reactor, the sewage source concentration to the reactor height The wastewater can be treated efficiently by discharging the reactor treated water of the minimum pollution concentration in the distribution .

In addition, the present invention is a reactor in which raw sewage water is introduced from the bottom of the reactor and treated in an upflow manner, 1) the land area occupied by the reactor is much smaller than that of the conventional aeration reactor in a wastewater treatment plant where the flow of wastewater in the reactor is horizontal; 2) The surface of the upper part of the reactor has a plurality of screens having a body opening hole of 5mm x 5mm or less, the surfactant bubbles generated on the surface of the upper part of the reactor passes through the plurality of screens, the bubbles are broken or small, The droplets containing the surfactants are lowered by the weight of the surfactant bubbles accumulated on them and recovered to the upper surface of the reactor, thereby oxidizing or decomposing the re-dissolved surfactants at the top of the reactor .

1 shows a process and apparatus for sewage treatment containing surfactants
2 is a view showing a screen support installed in the reactor

According to the present invention, when the wastewater to be treated does not contain a surfactant, the surfactant is injected into the reactor from the outside of the reactor or artificially injected into the wastewater to be treated with the appropriate amount of the surfactant. In the case of sewage and wastewater containing surfactants, which occupy part of the waste water BOD and COD, sludge and fluidized bed flow is filled with sludge and fluidized bed carrier in the reactor for sewage treatment, without artificial injection of surfactant and by aeration from the bottom of the reactor. A phase is formed and the reactor treated water outlet discharges the reactor treated water with the minimum pollutant concentration from the wastewater contaminant concentration distribution to the reactor height and discharges it through the mooring tank to perform the efficient advanced treatment such as the removal of organic matter and nitrogen removal of the wastewater. ;

Surfactants dissolved or present in micelle form in the sewage water transition to the air or oxygen bubble's interface with the waste water and the bubble rises from the bottom of the reactor, creating a surfactant bubble on the water surface above the reactor;

Above the surface of the reactor there are a plurality of screens having a body opening hole of 5mm x 5mm or less, so that the resulting surfactant bubbles are broken or small as they pass through the plurality of screens, including the generated surfactant The present invention relates to a method and a reactor apparatus for oxidizing or decomposing a re-dissolved surfactant at the top of a reactor while the droplets are dropped and recovered to the top of the reactor, and at the bottom of the reactor, for oxidizing or decomposing residual organics and inorganics. Accordingly, the present invention in that it performs the sewage treatment without separate secondary process for the separate collection and separation bubble trapping of bubbles generated in the reactor upper surface of the water, utilizing a surface active agent prior art and greatly.

The apparatus of the present invention, as shown in Figures 1 and 2 for the treatment of wastewater 1) the wastewater raw water 19 inlet (1), the air diffuser (2) to generate air or oxygen microbubble (20) and flow consultation A reactor lower part 4 composed of perforated partitions 3 through which the sieve cannot pass; 2) a reactor top 8 composed of a plurality of screens 5, screen supports 24, air outlets 6, sludge outlets 7 and perforated partitions 3 through which the fluid carrier cannot pass; 3) A reactor 26 consisting of a reactor treated water outlet 9 located at the boundary between the reactor lower part 4 and the reactor upper part 8, wherein the mooring tank inlet 11 is located above the reactor treated water outlet 9 position. Mooring tank 10, mooring tank sludge pump 12, conveying tank 13, conveying tank sludge pump 14, wastewater raw water injection pump 15, blower 16 for supplying air or oxygen to the diffuser And a vacuum suction device 18 connected to the surfactant injection device 17 and the air outlet 6. Instead of the installation method of the screen 5 as in FIG. 1, FIG. 2 shows that the droplet 22 descends on the screen support inclined surface 27 and the upper surface of the reactor 8 through the droplet lower hole 25. The screen support 24 provided in the reactor 26 which is redissolved and collect | recovered is shown.

The process of the present invention 1) in the case of raw wastewater that is introduced into the reactor does not contain a surfactant, the surfactant is injected into the reactor from the outside of the reactor, or the surfactant is added to the raw wastewater introduced into the reactor fair; 2) A surfactant dissolved in the sewage water introduced into the reactor from the bottom of the reactor or present in the form of micelles is formed at the interface between the air bubble or oxygen bubble generated from the bottom of the reactor and the waste water. Adsorption and concentration by mass transfer, a bubble in which a surfactant is adsorbed due to the density difference between air and wastewater rises to the top of the reactor; 3) a process in which the surfactant foam generated on the surface of the reactor at the top of the reactor is redissolved on the surface of the water, or the surfactant in dissolved or micelle form is oxidized or decomposed; 4) oxidizing or decomposing the remaining organics and inorganics at the bottom of the reactor; 5) discharging the reactor treated water of the minimum pollution concentration in the pollutant concentration distribution of the wastewater to the reactor height at the reactor treated water outlet installed at the boundary between the upper and lower portions of the reactor; 6) separating the microbial sludge into the lower part of the reactor by separating the suspended particles consisting of external discharge water and microbial sludge in the mooring tank connected to the reactor; 7) the air outlet of the reactor is intermittently connected with vacuum suction to intermittently remove the surfactant bubbles on the reactor top; 8) The upper surface of the reactor forms a plurality of empty stages, each separated by a screen, so that the bubbles are broken or small as the surfactant bubbles pass through the plurality of screens, and the droplets containing the surfactants generated at this time are lowered. Recovering above the surface of the reactor; 9) The sludge is discharged from the upper surface of the reactor or below the reactor, and is returned to the lower part of the reactor or flows into the tank inlet connected to the reactor and returns the sludge to the bottom of the reactor.

Meanwhile, the process and apparatus of the present invention are characterized in that 1) the reactor treated water is introduced using a water head into the mooring tank inlet connected to the reactor, which is above the height of the reactor treated water outlet; 2) the reactor comprises MLSS at a concentration of 100 to 30,000 mg / L MLSS or is charged with a fluidized bed microbial carrier; 3) the reactor consists of each stage separated by a perforated partition through which the packed fluidized bed microbial carrier cannot pass; 4) The screen is a screen having an opening of a size of 5mm x 5mm or less and the intermittent vibration movement is performed by manual or automatic vibration device.

1. Sewage raw water inlet
2. Air or oxygen bubble generating diffuser
3. Perforated divider that fluid carrier cannot pass through
4. Reactor bottom
5. Screen
6. Air outlet
7. Sludge Outlet
8. Reactor Top
9. Reactor treated water outlet
10. Mooring tanks
11. Mooring Inlet
12. Mooring Sludge Pump
13. Return tank
14. Carrier tank sludge pump
15. Sewage water supply pump
16. Blur
17. Surfactant injection device
18. Vacuum suction device
19. Wastewater Source
20. Air or oxygen bubbles
21. Surfactant Foam
22. Drops
23. Fluidized Bed Microbial Carriers
24. Screen support
25. Droplet Downhole
26. Reactor
27. Screen support slope
28. Reactor top water surface
29. Effluents
30. Air or gas containing oxygen

Claims (4)

A lower portion of the reactor including a sewage raw water inlet, an air or oxygen bubble diffuser, and a perforated partition through which the fluid carrier cannot pass;
A reactor top composed of a plurality of screens, air outlets, sludge outlets and perforated partitions through which the fluid carrier cannot pass, or wherein screen support is added;
The reactor is made to the reactor treated water outlet,
Mooring tanks, mooring tank sludge pumps, sewage raw water injection pumps and blowers having a mooring tank inlet above the reactor treated water outlet location;
Sewage water treatment device characterized in that. In addition to the wastewater treatment apparatus of claim 1;
Or a vacuum suction device connected to a conveying tank, a conveying tank sludge pump, and an air outlet;
A surfactant injection device is additionally configured;
Sewage water treatment device characterized in that. According to claim 1, wherein the screen support is composed of the screen support inclined surface and the drop down hole, the upper hole area is narrower than the lower hole area;
Sewage water treatment device The screen according to any one of claims 1 to 3, wherein the screen is configured to horizontally separate a plurality of empty stages on the upper water surface of the reactor, respectively, or a plurality of horizontally installed on the screen support;
Sewage water treatment device characterized in that.

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