KR100638319B1 - Ds-gr-hcs - Google Patents

Abstract

A wastewater recycling system that improves economic efficiency, suppresses water shortage phenomena and contributes to environmental improvement by retreating wastewater discharged through a primary treatment only and recycling the retreated wastewater as reusing water, thereby recycling resources is provided. A hybrid compound system for recycling reusing water comprises a flow equalization tank, an anoxic tank, a biofilm tank, an MBR(membrane bioreactor)(40), an ozone treatment tank and a discharge tank, wherein the MBR comprises: an inflow pipe through which wastewater treated in the biofilm tank flows into; a screen(401) which is constructed in a mesh structure with an opening of 0.3 to 0.4 mm and spaced from the membrane module to filter adulterations from wastewater; a membrane module(402) which is installed within the MBR, and through which adulteration removed wastewater passes to filter suspended solids; and an air diffuser(200) which is installed under the membrane module, and in which air flown in an diffusion pipe(201) through an air supply pipe(202) is ejected through an ejection pipe(203), wherein the ejection pipe is bent to an acute angle of 30 to 85 degrees of an angle and has a diameter of 0.1 to 3 mm so as to efficiently remove cake on the surface of the membrane module by forming a turbulent flow.

Description

Hybrid compound system for heavy water reuse {DS-GR-HCS}

1 is a wastewater recycling treatment flow chart according to the present invention.

2 is a schematic diagram of a wastewater recycling system according to the present invention.

3 is a schematic view showing an MBR tank according to the present invention.

4 is a schematic view showing a polyethylene carrier according to the present invention.

Explanation of the main symbols in the drawings

Reference Signs List 10 flow rate adjusting tank 20 anoxic tank 30 biofilm tank

40: MBR tank 60: discharge tank 200: diffuser

201: air diffuser 202: air supply pipe 203: injection pipe

301: inlet pipe 401: screen 402: membrane module

The present invention provides a flow control tank (10) for recycling sewage, such as sewage that does not contain rainwater (rainwater), drainage in buildings, drainage (manure sewage) in toilets and toilets of flush toilets, and household sewage including kitchen drainage. ), An anoxic tank 20, a biofilm tank 30, an MBR tank 40, an ozone treatment tank 50, and a discharge water tank 60. It is very economical in that it uses heavy water recycled from various wastewaters to prevent water shortages in large cities and ultimately recycles resources.

Water is an indispensable resource for people to maintain their lives, and it is very difficult to secure water resources that are practically available due to current water shortages and pollution of the world. In Korea, two-thirds of annual precipitation is summer. As the seasonal and regional concentration of water resources is the highest in the world, it is very difficult to secure stable water resources, which can lead to severe water shortages if prolonged droughts occur.

In spite of such concerns, even though it is sufficiently recyclable at present, there are many water resources that are discarded as they are, so proper recycling of resources is not achieved, causing environmental pollution as well as lack of water resources.

In order to solve the above problems, in the present invention, by reprocessing the sewage discharged only by the primary treatment and recycling to heavy water, not only economics due to resource recycling, but also to reduce the water shortage phenomenon and to improve the environment The aim is to provide a recycling system.

In order to achieve the above object, in the present invention, while controlling the sharp increase and decrease of the amount of introduced sewage, while supplying a certain amount of air to the air dispersing device provided at the bottom to induce sludge settling and corruption prevention of sludge Wow,

Nitrogen in the wastewater introduced from the flow rate adjustment tank, an oxygen-free tank for phosphorus treatment,

A biofilm tank for decomposing organic matter using PE carriers after the anoxic tank,

MBR tank for water treatment by passing the sewage through the biofilm tank through the separation membrane,

An ozone treatment tank that treats sewage in which organic matter has been processed by microorganisms in contact with ozone,

Wherein the treated water in the ozone treatment tank is made of a discharge tank for maintaining for a certain time to release to the outside,

The MBR tank introduces the sewage treated in the biofilm tank through the inlet pipe, and passes the introduced sewage through a 0.3 ~ 0.4mm mesh structure screen separated from the membrane module installed inside the MBR tank to process the contaminants. , Where wastewater treated with contaminants is passed through the membrane module to process fine materials. The separator module includes an acid pipe at the bottom of the membrane module to inject air introduced into the acid flow pipe through an air supply pipe through an injection pipe. The main pipe is a hybrid compound system for reuse of heavy water, which is formed to have a diameter of 0.1 to 3 mm at an acute angle of 30 to 85 ° to form a turbulent flow to efficiently remove the cake on the surface of the membrane module. do.

The flow regulating tank controls a sudden increase and decrease of the amount of introduced sewage, while supplying a predetermined amount of air to an air diffuser provided at the bottom thereof, inducing sludge settling and preventing corruption.

The anoxic tank removes nitrogen by a denitrification reaction in which nitrate nitrogen (NO ₃ ⁻ ) is nitrogen gas (N ₂ ).

The biofilm tank is a water treatment using a PE carrier, the organic material is decomposed by the microorganism attached to the PE carrier.

The MBR tank introduces the sewage treated in the biofilm tank through the inlet pipe, and passes the introduced sewage through a 0.3 ~ 0.4mm mesh structure screen separated from the membrane module installed inside the MBR tank to process the contaminants. , Where wastewater treated with contaminants is passed through the membrane module to process fine materials. The separator module includes an acid pipe at the bottom of the membrane module to inject air introduced into the acid flow pipe through an air supply pipe through an injection pipe. The injection pipe is formed with a diameter of 0.1 ~ 3mm at an acute angle of 30 ~ 85 ° characterized in that it is configured to form a turbulent flow to efficiently remove the cake on the membrane module surface,

In particular, the sewage is rapidly reduced in the BOD and SS values through the MBR tank, which is formed at the bottom of the membrane module and the 0.3 ~ 0.4mm mesh structure provided inside the MBR tank. This is because the processing efficiency is increased by the diffuser which is configured to periodically clean the existing cake to increase the efficiency of the separator.

The ozone treatment tank is a water treatment using ozone introduced from the ozone generator, and is a place for removing hardly decomposable substances contained in the sewage through the MBR tank, and corresponds to a final treatment tank of sewage. The sewage treated in this way is treated with heavy water and discharged to the outside through the discharge tank.

Hereinafter, the above configuration will be described in more detail with reference to the accompanying drawings. 1 is a brief view of the drawings, the flow of the introduced wastewater control tank 10, oxygen-free tank 20, biofilm tank 30, MBR tank 40, ozone treatment tank 50, discharge tank 60 Figure 2 is a flow chart showing the treatment process reused in heavy water, Figure 2 is a schematic diagram of the wastewater recycling system according to the present invention, Figure 3 is a schematic diagram showing an MBR tank according to the present invention. 4 is a schematic view showing a polyethylene carrier according to the present invention.

As shown in Figure 1, the heavy water reuse system using the sewage according to the present invention flow rate adjustment tank 10, oxygen-free tank 20, biofilm tank 30, MBR tank 40, ozone treatment tank 50, discharge Sewage is reprocessed into heavy water via the tank 60 and used.

The flow rate adjustment tank 10 is provided with an diffuser at the bottom to supply air into the flow rate adjustment tank to prevent sedimentation and decay of the sludge contained in the sewage, and to prevent the inflow of the sewage from rapidly increasing or decreasing. It keeps the inflow to the anaerobic tank 20 constant.

In the anoxic tank 20, nitrogen is removed by a denitrification reaction in which nitrate nitrogen (NO ₃ ⁻ ) is nitrogen gas (gas, N ₂ ). The reaction mechanism is as follows.

^{_{2NO 3 - + 2 (H 2}} ) → 2NO 2 - + 2H 2 O

^{_{2NO 2 - + 3 (H 2}} ) → N 2 ↑ + 2OH - + 2H 2 O

It is contained in leachate through the process of removing nitrate nitrogen as nitrite nitrogen and nitrite nitrogen as nitrogen gas using denitrification microorganisms such as Pseudomonas and Bacillus. A process of converting nitrate nitrogen which is present into nitrogen gas using an organic material. The nitrogen is removed by a denitrification reaction in which nitrate nitrogen (NO ₃ ⁻ ) is converted to nitrogen gas (gas, N ₂ ). The aeration is transported to the biofilm tank 30 which is treated by microorganisms to be aerated. The aeration is an operation in which water and air are sufficiently contacted by blowing air into the water or spraying water into the air. It will promote digestion by the action and aerobic bacteria. Microorganisms remove carbon dioxide, hydrogen sulfide, methane gas, etc. by digestion, and are a method of aeration of sewage to make microorganisms purify water.

The inside of the biofilm tank 30 is provided with a polyethylene (PE) carrier 31, by using a biofilter formed on the polyethylene carrier 31 to remove the biomass generated by the characteristics of the microorganism and at the same time.

The microorganism is used in the same ratio of Opercularia (Opercularia), Carchesium (Carchesium), Zoothamnium (Zoothamnium). The microorganism thus constructed has a characteristic that the higher the BOD, the higher the fertility.

The polyethylene (PE) carrier 301 is manufactured by discharging a polymer formed by heating and melting a high-density polyethylene resin at 120 to 150 ° C. by an electric heater. As shown in FIG. 4, a polyethylene carrier formed in a cylindrical shape ( The inner and outer circumferential surface of the 301 to form a pleated jaw portion 302 is configured to facilitate the fixing and propagation of microorganisms, characterized in that configured to increase the water treatment efficiency. The sewage aerated in the biofilm tank 30 is introduced into the MBR tank 40 for water treatment through the separation membrane.

 The polyethylene carrier 301 heats and melts the polyethylene resin to produce a polymer by heating and melting in the range of 120 to 150 ° C. as the heating temperature is lower than 120 ° C. or 150 ° C. when the discharge is not performed well. It is preferable.

The MBR tank 40 forms turbulence in the MBR tank 40 by the strong air emitted from the sludge (cake) attached to the surface of the membrane module 402 from the acid engine 200 to efficiently use the membrane. In order to maintain the concentration of oxygen in the MBR tank 40 by the strong air emitted from the diffuser 200, the membrane contaminant of the membrane module 402 is efficiently removed to treat the wastewater containing organic matter as a whole. In order to efficiently proceed, the removal of membrane fouling material formed in the separator is generated not only by the air rising from the diffuser 200 but also by the rising water flow generated by the air.

Looking at the configuration of the MBR tank 40, the screen 401 of the mesh structure to maintain a gap of 0.3 ~ 0.4mm in the inner outer circumference of the MBR tank 40 is formed in a cylindrical shape, the cylindrical screen of such a mesh structure ( 401 removes contaminants contained in the wastewater, and primarily prevents the water treatment function of the separation membrane module 402 from deteriorating.

In addition to the screen 401, the diffuser 200 is formed at the inner bottom of the MBR tank 40 to blow out strong air to the membrane module 402 to clean the surface of the membrane, thereby increasing the lifetime and water treatment efficiency of the membrane. .

The diffuser 200 is manufactured by injection molding and assembling using a synthetic resin material resistant to chemicals, and has strong oxidation corrosion resistance, and the air supplied from the blower (not shown) is passed through the air supply pipe 202 to FIG. 3. It is composed of a spray pipe 203 having a diameter of 0.1 ~ 3mm, formed while forming an acute angle (θ) of 30 ~ 85 ° with the acid cylinder tube 201, as shown in the function of the diffuser is the oxygen The amount of oxygen delivered depends on the amount of oxygen delivered, which indicates the amount of dissolved water. It depends on the installation method and flow rate of the diffuser.

When the acute angle θ is 35 ° or less, the strength of the air blown through the membrane module is very small, so that it is difficult to efficiently remove the cake layer. When the angle is greater than 85 °, vortices and turbulence are difficult to form. It is desirable to air at an angle of 85 degrees.

This diffuser is configured to induce maximum effect to remove the cake layer accumulated on the membrane. Merging the sludge adhering to the membrane by transferring the reaction water to the reverse side and efficiently removing the sludge adhering to the membrane by the strong air emitted from the air dispersing device to maximize the treatment efficiency of the waste water by the membrane. By extending the life of the membrane according to the overall treatment efficiency and treatment cost reduction effect. In addition, the treatment process is simple and has the advantage that it can be easily installed and utilized.

The ozone treatment tank 50 is a place where the sewage that has passed through the MBR tank 40 is finally treated through ozone contact. The ozone treatment tank 50 comes into contact with the ozone introduced from the ozone generator 31. The degradable material is treated to finally regenerate sewage into heavy water.

Water treatment using ozone utilizes the properties of ozone, and ozone exists in the form of three oxygen atoms combined in four shape resonance structures, and OH radicals generated when ozone self-decomposes have a strong oxidizing power and pollutant organic matter. The material is oxidized, reacts with heavy metals, and the like to be converted into a harmless compound. The ozone can be used for the purpose of removing color, reducing molecular weight of a high molecular compound, and reducing micro-pollutants such as COD and BOD.

This direct reaction of ozone causes the organic and ozone molecules to react directly to form a primary intermediate product, which in turn reacts slowly with ozone to convert to other oxidation products or end products. In addition, the indirect reaction of ozone is a self-decomposition prior to the reaction with the organic material above the threshold pH value, in which the ozone decomposing intermediates such as the generated OH radicals become an important oxidant and react with the organic material.

The sewage treatment system as described above enables the recycling of sewage into heavy water, and most of the sewage discharged from large businesses, amusement facilities, and homes is made up of kitchen oil, foreign substances, soap, etc. Sewage treated by conventional conventional treatment methods, such as biological treatment methods, are contained in large quantities, but they generally meet the effluent water quality standards, but contain micro-contaminants, so additional treatment is required for reuse.

The discharge tank 60 is disinfected in the reprocessed heavy water by the final treatment of sewage and discharged to the outside.

Hereinafter, the heavy water reprocessing process of the wastewater through the hybrid compound system for heavy water reuse will be described.

As shown in FIG. 1 or FIG. 2, the introduced sewage is controlled to rapidly increase or decrease the amount of sewage in the flow regulating tank 10, and a predetermined amount of air is supplied to the diffuser provided at the bottom of the flow regulating tank 10. By supplying the sedimentation and decay prevention of the sludge is transported to the anaerobic tank 20. (S10)

Subsequently, the sewage transferred to the anoxic tank 20 is removed by using denitrification microorganisms such as Pseudomonas and Bacillus, and denitrifying nitrogen as nitrite nitrogen and nitrite nitrogen as nitrogen gas. After passing through the nitrogen treatment process to convert the nitrate nitrogen contained in the leachate to nitrogen gas using organic matter is transferred to the biofilm tank (30).

Subsequently, the sewage that is transferred to the biofilm tank 30 is aerobic microorganisms in which 1: 1 mixture of Opercularia, Carchesium, and Zoothamnium is added to polyethylene (PE). While inhabiting the carrier, the organic matter is decomposed and transferred to the MBR tank 40 through the inlet pipe 31. (S30)

Subsequently, the sewage transferred to the MBR tank 40 firstly removes large particles of contaminants through the cylindrical screen 401, and the firstly removed sewage is separated through the membrane module 402 to separate the discharge pipe 41. It is conveyed to the ozone treatment tank 50 through the air supply pipe 202 and is sprayed from the injection pipe 203 having a diameter of 0.1 ~ 3mm, formed while forming an acute angle of 30 ~ 85 ° with the acid cylinder pipe 201 through the air supply pipe 202 By forming the vortex and turbulence through the air coming out to remove the cake of the membrane module 402. (S40)

Subsequently, the sewage transferred to the ozone treatment tank 50 is transferred to the discharge tank 60 by inducing color removal, low molecular weight of the polymer compound, reduction of COD, BOD, and micro-pollutants through contact with ozone. )

Subsequently, the sewage transferred to the discharge tank 60 is discharged after staying, thereby finishing the heavy water recycling process of the sewage. (S60)

The heavy water recycled by reprocessing the sewage in this way has a BOD of 10 mg / l or less and meets the water treatment standard, and no E. coli or residual chlorine is detected.

As described above, a sewage treatment system for reprocessing sewage according to the present invention and recycling it into heavy water suggests a solution for the water shortage problem that is currently emerging as a problem, and by using heavy water where it is not necessary to use a constant This results in saving water and improving the environment.

Claims (3)

A flow rate adjusting tank 10 for supplying a predetermined amount of air to an air diffuser provided at the bottom of the sludge to prevent sedimentation and rot prevention while controlling the amount of introduced sewage to rapidly increase or decrease; Oxygen-free tank 20 for the treatment of nitrogen, phosphorus introduced from the flow rate adjustment tank 10, Biofilm tank 30 for decomposing organic matter using a PE carrier to the wastewater passed through the oxygen-free tank 20, MBR tank 40 for water treatment by passing the sewage through the biofilm tank 30, the separation membrane, An ozone treatment tank 50 which treats sewage in which organic matter has been processed by microorganisms in contact with ozone; In the discharge tank 60 for maintaining the treated water treated in the ozone treatment tank 50 for a predetermined time to discharge to the outside, The MBR tank 40 is introduced into the sewage treated in the biofilm tank 30 through the inlet pipe 301, and the introduced sewage is spaced apart from the separation membrane module 402 installed in the MBR tank 40 Through the screen 401 having a mesh structure of 0.3 ~ 0.4mm to process the contaminants, and the sewage treated with the contaminants passes through the membrane module 402 to process fine materials, the bottom of the membrane module 402 The spray pipe 203 is provided with an diffuser 200 to inject air introduced into the diffuser tube 201 through the air supply pipe 202 through the spray pipe 203, and the spray pipe 203 is 30 to 85 It is formed with a diameter of 0.1 ~ 3mm at an acute angle of ˚ hybrid compound device for heavy water reuse, characterized in that configured to efficiently remove the cake on the surface of the membrane module by forming a turbulent flow. The method of claim 1, wherein the PE carrier is produced by discharging a polymer formed by heating and melting a high-density polyethylene resin by an electric heater at 120 ~ 150 ℃, microbial by forming a pleated jaw on the inner and outer peripheral surfaces of the polyethylene carrier formed in a cylindrical shape Hybrid compound device for heavy water reuse, characterized in that configured to facilitate the fastening and propagation of. delete

Images