KR20010027426A - Device for reclaiming waste water - Google Patents

Abstract

PURPOSE: An apparatus is provided which is appropriate for waste water reclamation and reusing system in local and wide areas by promptly treating a large amount of sewage and waste water near to clean water for reusing as life water, and protects water resource and preserves natural ecosystems by completely treating various sewage and waste water of individual building and area, excrements and animal waste water to less than 10 PPM based on BOD for reusing. CONSTITUTION: The apparatus comprises a sewage and waste water collecting vessel (1) in which the inflow of raw water is oxidized, dissolved and aerated by an ultrasonic oxidizing unit (27); a rapid settling separation unit (7), wherein the raw water supplied from the sewage and waste water collecting vessel (1) is chemically treated, foreign substances contained in the raw water are coagulated and settling separated, and the concentrated sludge is discharged; an oil/water separator (8) separating coagulated floats contained in the treated water first treated in the rapid settling separation unit (7); and an ozone reaction vessel (32) discharging the finally treated water after ozone oxidation treating the second treated water supplied from the oil/water separator (8).

Description

Device for reclaiming waste water {Device for reclaiming waste water}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to treatment of sewage and wastewater, and more particularly, to an apparatus for dewatering wastewater.

The water resources absolutely necessary for the animals and plants of nature and nature were reduced to the original clean water by the self-cleaning effect of the natural cycle, and were supplied to the animals and plants of nature and nature. With the improvement of living standards, the problem of water pollution is getting worse day by day, which is absolutely lacking even in our human life as well as the destruction of some ecosystems.

Even in the realities of lack of water resources, various wastewaters, livestock and manure wastes, fish farms, and fisherman's waters can be drained into rivers and seas, or they can be discharged by insufficient treatment and discharge. It is destroying the ecosystem.

In general, there are various methods of treating wastewater, including physical, chemical, and biological treatments. However, in Korea, biological (active sludge) treatment is the basic process, but biological treatment has a large area, space, and prolonged treatment time. In addition, the management of microorganisms according to the quality of the wastewater requires not only specialty but also the management of the microorganisms is not very efficient.

As a result, wastewater treatment until now has been relied upon only by the standards of the Environmental Conservation Act (Water Pollution Prevention Act) to discharge the wastewater according to the standards.

Recently, the concept of heavy water was reintroduced in Korea between the water supply to use water and the sewage to discharge used wastewater. There are two ways of using the water system: individual circulation method, regional circulation method, and regional circulation method, depending on the raw water used and the range of use.In our country, about 6 buildings, including Lotte World, Jamsil, The system is adopted.

The individual circulation type of water system is mainly composed of membrane separators. The membrane separators can be compactly configured, which is suitable for the treatment of heavy water in a unit building, but requires a large amount of treatment in areas and wide areas. The circulation method is difficult to adopt.

As a result, the biological treatment method used in the conventional wastewater treatment is inevitably used as a large-scale heavy water system such as region and wide area, which takes up a large area, a long treatment period, and a complicated treatment and management problem. have.

The present invention was created in order to solve such a problem, so that a large amount of waste water can be quickly treated to clean water to be reused as living water, which is not only suitable for local or wide-area heavy water systems, but also small in size to individual circulation systems. It is to provide a small-capacity dewatering device that can be implemented.

In particular, the present invention seeks to protect our water resources and further preserve natural ecosystems by completely treating and repeatedly reusing BOD standards below 10PPM to recycle not only various wastewater in individual buildings or areas, but also manure and livestock wastewater. Has a purpose.

1 is a block diagram showing the configuration of the wastewater treatment apparatus of the present invention,

FIG. 2 is a block diagram illustrating in detail a portion of the rapid sedimentation separator and the oil / water separator.

<Description of the code | symbol about the principal part of drawing>

1: wastewater sump 2: wastewater inlet

3: screen 4: pressurized pump

5: chemical mixing device 6: chemical feeder

7: Rapid sedimentation separator 8: Oil-water separator

9: flow control valve 10: wastewater supply pipe

11: Primary treatment water feed pipe 12: Second treatment water feed pipe

13: Concentrated sludge discharge valve 14: Flocculation flotation discharge valve

15,30: Residual sludge discharge valve 16: ozone generator

17: oxygen supply unit 18: treated water storage tank

19: ozone detonator 20: residual ozone destroyer

21,22: final treatment water transfer pipe 23: dewatering device

24: solid sludge 25: degreasing liquid delivery pipe

26: ultrasonic generator 27, 28, 29: ultrasonic oxidizer

31: sludge discharge pump 32: ozone reactor

33: condensation plate 34: flocculation floating plate

In order to achieve the above object, the present invention is to increase the utility value by allowing the dewatered water, such as domestic sewage, livestock, and manure waste water, to be treated first, and to be dewatered and recycled into household water.

A foreign substance removal and oxidation contact means which removes harmful foreign substances in the raw water introduced into the wastewater collection tank by the screen and oxidizes, decomposes and aerators by ultrasonic oxidizer in the wastewater collection tank,

Chemical mixing means for condensing sludge by mixing the chemicals in the chemical mixing device,

Sedimentation separation means for sedimenting and discharging the concentrated sludge agglomerated in the rapid sedimentation separator with a dehydrator,

A flocculation flotation treatment means which is a secondary treatment step of reprocessing flocculation flotations in the primary treated water in the oil / water separator and sending the flocculation flotations to the dehydrator;

It is characterized in that it comprises a final ozone reaction means for sending the secondary treated water to the ozone reactor, the ozone advanced treatment to completely purify the waste water through the ozone detonator for safe reuse.

Example

It looks at the specific configuration and operation of the present invention by the description of the preferred embodiment with reference to the drawings.

Figure 1 is a schematic block diagram showing the wastewater and livestock, manure wastewater treatment apparatus of the present invention, Figure 2 is a detailed block diagram showing a quick sedimentation separator and oil and water separation apparatus that performs an important role of the present invention in Figure 1 It is also.

Reference numeral 1 denotes a wastewater collection tank temporarily storing untreated raw water and performing oxidation and aeration. Waste water is introduced into the waste water collection tank (1) through the waste water inlet (2) installed in the front of the waste water collection tank (1), and removes harmful impurities through the screen (3). The screen 3 has a structure similar to that of a general sieve, and has a large particle foreign matter (10 mm or more foreign matter, stone, plastic) that causes various harmful impurities to flow along with the raw water and prevent the load and smooth operation of the machine in the next process. , Glass pieces, etc.) and the screen 3 is connected to a wastewater sump 1.

An ultrasonic oxidizer 27 connected to the pneumatic ultrasonic generator 26 is installed below the wastewater collection tank 1, and the ultrasonic oxidizer 27 generates high frequency at high pressure to generate oxygen in raw water. As a device for supplying, oxidizing and aeration, ultrasonic waves are generated by compressed air, not vibration method using electrodes.

As a result, in the wastewater collection tank 1, continuous oxidation, decomposition, and aeration occur simultaneously to maximize the sedimentation and flocculation injuries that can be separated and processed in the rapid sedimentation separator 7 and the oil-water separator 8 of the next stage. Its role is to make it work.

The raw water of the wastewater collection tank 1 is connected to the chemical mixing device 5 through a wastewater supply pipe 10 including a pressurized pump 4 and a flow control valve 9. The flow control valve (9) regulates the flow rate of the raw water to be efficiently processed in the next process and the chemical mixing device (5) is connected to the chemical quantity feeder (6) of the appropriate amount of chemical required for chemical treatment of raw water By supplying continuously, the sludge contained in the raw water is agglomerated to function as a pretreatment operation for sedimentation separation and flocculation flotation treatment in the next process. This chemical mixing device 5 is a device capable of continuous mixing operation on the line with high efficiency without the need for a separate chemical stirring tank and stirrer.

In addition, the chemical mixing device (5) is connected to the rapid sedimentation separator (7), the rapid sedimentation separator (7) is a condensation means and condensation to agglomerate the liquid foreign matter contained in the raw water close to solidification At the same time, it consists of an oxidation means by the ultrasonic oxidizer 29, sedimentation separation means for sedimentation, separation and discharge of condensed foreign matter. The raw water introduced at high pressure into the rapid sedimentation separator 7 primarily passes through the condensation plate 33 and condenses the foreign matter in the liquid contained in the raw water close to solidification. At this time, the ultrasonic oxidizer 29 serves to accelerate the separation of foreign matter by oxidizing at the same time as the condensation. The primary condensed water moves to the bottom of the rapid sedimentation separator (7) and is sedimented and separated, and the concentrated sludge is discharged to the dewatering device (24) through the concentrated sludge discharge valve (13). The primary treatment water is transferred to the oil and water separator 8 through the primary treatment water feed pipe 11 connected to the oil and water separator 8.

The oil-water separator 8 is a device for separating and treating the floating matters contained in the primary treated water which has been sedimented and treated first, and the primary treated water introduced into the oil-water separator 8 is aggregated. The flocculation flotation is separated and passed through the flotation plate 34 to discharge the flocculation flocculation through the flocculation flotation discharge valve 14 at the upper portion and to be transferred to the dehydration apparatus 23. Separation is carried out to the dehydration device 23 through the valve 15. At this time, oxidation and aeration by the ultrasonic oxidizer 28 occur simultaneously to promote flocculation and oxidation, and the secondary treated water from which flocculated flotation and residual sludge is removed is transferred to the secondary treated water conveying pipe 12. Through the ozone reactor 32 to be introduced.

Since the ozone reactor 32 is composed of compartments of several stages connected to each other, the treated water passes through multiple stages, and an ozone detonator 19 connected to the ozone generator 16 is provided at the lower portion of each stage. The ozone generator 16 is installed in connection with the oxygen supply device 7.

In addition, in the final stage of the ozone reactor 32, the treatment water storage tank 18 is installed and the residual ozone destructor 20 is installed on the treatment water storage tank 18, which may cause serious environmental problems. It is a device that destroys residual ozone to prevent the discharge of ozone.

In addition, since the secondary treated water introduced into the ozone reactor 32 includes hardly decomposable and untreated organic and inorganic substances, the ozone reactor 32 is hardly decomposable and untreated using an ozone oxidizer, which is a highly oxidizing method. Dispose of used minerals and minerals.

That is, ozone supplied from the ozone generator 16 to the ozone reactor 32 causes harmful chemical reactions in the material to form OH radicals. OH radicals are hardly decomposable and have an affinity with untreated organic and inorganic substances in stages faster than ozone alone, and they are oxidatively decomposed and treated so that we can reuse the wastewater. The water can be processed and reused the fastest.

And a residual sludge discharge valve 30 for discharging the residual sludge is connected to the lower portion of the ozone reaction tank 32 to discharge the residual sludge to the dewatering device (23). The sludge discharged through the sludge discharge valves 13, 15, and 30 is sent to the dewatering device 23 by the sludge discharge pump 31, and the dewatering device 23 dehydrates the various sludge discharged by containing water. It is discharged to the solid sludge 24, and the desorption liquid generated here is sent to the wastewater collection tank through the desorption liquid conveying pipe 25 and is reprocessed through the process.

In addition, the treated water that has undergone the ozone oxidation treatment in the ozone reactor 32 is recycled or discharged to the heavy water through the treated water storage tank 18 through the final treated water transfer pipes 21 and 22.

Looking at the method of treating wastewater using the apparatus for the dewatering of wastewater, livestock and manure wastewater of the configuration as described above are as follows.

Firstly, various harmful foreign substances are removed from the screen (3) and raw water is sent to the wastewater collection tank (1) to remove, remove and oxidize the foreign matters which are oxidized, decomposed, and aerated by the ultrasonic oxidizer (27) in the wastewater collection tank (1). In this step, by oxidizing, decomposing and aeration of various organic substances contained in the water by the ultrasonic oxidizer to increase the efficiency of condensation and flocculation injury to be achieved in the next step to increase the treatment efficiency.

The next step is to transfer the raw water to the chemical mixing device (5) using a pressure pump (4) through the chemical mixing step of mixing the medicine by the chemical metering supply (6) to the liquid phase in the rapid sedimentation separator (7) The sludge is condensed by sedimentation and sedimentation is carried out through the settling separation step of discharging the concentrated sludge to the dewatering device 23 through the thickened sludge discharge valve 13, and the first treatment water is transferred to the oil / water separator 8. After the flocculation flotation contained in the primary treatment water is separated and discharged to the dewatering device 23 through the flocculation flotation treatment valve 14, the flocculation flotation treatment step is performed. By sending ozone to the ozone oxidation process, the wastewater is completely purified and safely reused for the final stage of production. This final treatment step sterilizes various pathogens and Escherichia coli contained in water and has an effect of removing odors.

In addition, the concentrated sludge sent to the dewatering device 23 is dewatered and discharged to the solid sludge 24, and the desorption liquid generated at this time is sent to a wastewater collection tank to go through the above steps again.

The treatment method of the present invention causes many problems in terms of efficiency, such as physical + chemistry, which has various advantages over conventional physical, chemical, and biological treatments. Although there are problems such as difficulty in managing due to various complexities, high initial investment cost, high maintenance cost, etc., the processing method of the present invention has no problem according to the characteristics and can be easily managed by anyone. Not only is the investment and maintenance cost low, it is automatically operated only when the waste water is generated, so that the machine does not need to be operated 24 hours, and the waste water can be quickly recycled to heavy water.

Therefore, the present invention is a small-capacity dewatering device that can be implemented as a separate circulation system because it is not only suitable for a regional or wide-area water supply system by rapidly treating a large amount of waste water close to clean water and reusing it as living water. In particular, we can protect our water resources by further treating and repeatedly reusing the BOD standard below 10PPM to recycle not only various wastewaters of individual buildings or areas, but also manure and livestock wastewater. It can be preserved.

Claims (4)

A wastewater collection tank which oxidizes, decomposes and aerations the incoming raw water by an ultrasonic oxidizer, A rapid sedimentation separator for supplying raw water from the wastewater collection tank and chemical treatment, and condensation and sedimentation of foreign substances contained in the raw water to discharge concentrated sludge; The oil-water separator which separates and processes the flocculant contained in this process by supplying the treated water primary-processed by this rapid sedimentation separator, The ozone reactor for supplying the secondary treated water from the oil / water separator and passing through the ozonation treatment to discharge the final treated water, A dewatering device for wastewater, characterized in that it is provided. The method of claim 1, The dewatering device of the wastewater, characterized in that the rapid sedimentation device comprises a condensation plate for condensation sedimentation separation process of the foreign matter of the liquid. The method of claim 1, The dewatering device of the wastewater, characterized in that the oil-water separation apparatus comprises a flocculation flotation plate for separating flocculation flotation and oil lumps contained in the water. The method according to claim 2 or 3, At least one of the rapid sedimentation separator or the oil-water separator is an ultrasonic oxidizer for promoting oxidation, characterized in that the dewatering device for waste water.