KR20050012875A - A water reclamation and reuse system with an equipment for removing TDS - Google Patents

Abstract

PURPOSE: To provide a wastewater reusing system in which an equipment for removing TDS(total dissolved solid) is installed to maximize a utilization range of the treated wastewater for reusing by utilizing treated wastewater for reusing as water for boilers or sprinklers having a relatively long retention time in pipes. CONSTITUTION: The wastewater reusing system with an equipment for removing TDS(total dissolved solid) comprises a storage tank(10) for collecting and storing supply raw water; a biofilter(20) in which a media(21) for adhesion and inhabitation of microorganisms is filled to simultaneously remove nitrogen, phosphorus, organic matter of low concentration, some turbidity constituents and suspended solid from the supply raw water flown in from the storage tank; a flow equalization tank(30) for constantly maintaining a flow amount of the treated water even when treated water passing through the biofilter is excessively produced and controlling a load variation of contaminants to smoothly treat water afterward; an activated carbon adsorber(40) for adsorbing and removing recalcitrant dissolved organic matter, residual chlorine, color, smell and a trace of harmful inorganic matter remained in treated water of which flow amount and quality are homogenized by the flow equalization tank; a microfilter(50) for removing fine suspended solid, polymeric substance and colloidal substance from the treated water passing through the activated carbon adsorber; an electrodialysis equipment(60) for concentrating and removing ionic TDS from the treated water passing through the microfilter by selective permeation; a chlorination equipment(70) for preventing the propagation of microorganisms and disinfecting the microorganisms by injecting chlorine into the treated water passing through the electrodialysis equipment; and a treated wastewater detention basin(80) for detaining the treated wastewater for reusing.

Description

A water reclamation and reuse system with an equipment for removing TDS}

The present invention relates to a sewage water system for treating wastewater or sewage treatment effluent (hereinafter, referred to as source water) containing low concentrations of organic matter and hardly degradable dissolved water and recycling it into heavy water, and more specifically, an electrodialysis apparatus. Alternatively, a reverse osmosis filtration device is provided to selectively remove dissolved solids (TDS) in the feed water, so that the treated heavy water has a long residence time in the pipe in addition to the usual use of heavy water such as cleaning water and toilet water. The present invention relates to a heavy water system in which dissolved solids removal devices are combined to maximize the scope of heavy water use and ultimately contribute to the securement of water resources.

In general, the water system refers to a system that makes heavy water originating from the meaning of being disposed between water and sewage by treating waste water or rainwater. As it is used as toilet water, cleaning water, car wash water, landscaping water, firefighting water, etc. that are not needed, it replaces a large part of the total tap water consumption. It can also contribute to protection.

In particular, in the modern society, water consumption is rapidly increasing due to changes in living patterns, rapid industrialization and urbanization, and the shortage of water due to the depletion of water resources is intensifying. In addition, the government is trying to meet the public's awareness of water pollution. Emission allowance standards have also been strengthened gradually, and the cost of water and water treatment has also increased significantly. Recently, the government recommended the dissemination of a sewage water system to reuse wastewater and sewage treatment effluent with low concentrations of pollutants. It is a situation that provides the benefits, such as, according to the prior art, the dewatering water systems having various configurations and functions are devised and implemented,

However, since the conventional water supply system does not have a separate device mainly intended for the removal of dissolved solids (TDS), the treated heavy water still has a high content of dissolved solids, which is a major cause of scale generation in pipes. There was a problem that it is not suitable for water having a relatively long residence time in the piping, such as boiler water such as apartments or multi-family houses occupying the ratio, or cooling water for cooling in industrial sites.

The present invention has been made in view of the above problems, by providing a device for the removal of dissolved solids in the system, so that the treated heavy water can be utilized as boiler water or sprinkling water with a relatively long residence time in the pipe. The purpose of the present invention is to provide a sewage water system that combines dissolved solids removal device that maximizes the utilization of heavy water.

1 is a schematic system diagram of a water-based water system combined with a dissolved solids removing device according to a first embodiment of the present invention

Figure 2 is a schematic system diagram of a water system combined with dissolved solids removal apparatus according to a second embodiment of the present invention

Figure 3 is a perspective view of the media used for filling and using the biofilter of the water system with the dissolved solids removal device of the present invention

<Description of the symbols for the main parts of the drawings>

10: reservoir 20: biofilter

21: Media 22: Internal support

23: tube 24: culture plate

25: external support 26: partition

27: water hole 30: flow rate adjustment tank

40: activated carbon adsorber 50: precision filter

60: electrodialysis device 70: chlorine disinfection device

80: heavy water storage tank 90: reverse osmosis filtration device

100: blower 110: pump

Hereinafter, with reference to the accompanying drawings, the water-based water system combined with the dissolved solids removal apparatus according to an embodiment of the present invention for achieving the above object is as follows.

1 is a schematic system diagram of a combined water removal system according to a first embodiment of the present invention with a dissolved solids removal device, and FIG. 2 is a schematic diagram of a water supply system with a dissolved solids removal device according to a second embodiment of the present invention. 3 is a perspective view of a media used for filling and used in a biofilter of a water system in which the dissolved solids removing device of the present invention is combined.

The water purification system combined with the dissolved solids removal device according to the first embodiment of the present invention is a wastewater system for treating wastewater or sewage treatment effluent, which is a feed water containing low concentrations of organic matter and hardly decomposable dissolved matter, with heavy water for recycling. ,

A storage tank 10 for collecting and storing supply water; The biofilter 20 is filled with a media 21 for attaching and culturing microorganisms and simultaneously removing nitrogen, phosphorus, and low concentrations of organic matter and a certain amount of turbidity components and suspended solids from the feedwater introduced from the reservoir 10. Wow; A flow rate adjustment tank 30 which maintains a constant flow rate even when excessively generated water passing through the biofilter 20 and adjusts load variation of contaminants for smooth after-treatment; An activated carbon adsorber (40) for adsorbing and removing hardly decomposable dissolved organic matter, residual chlorine, color, odor and trace amounts of harmful inorganic substances remaining from the treated water in which the flow rate and water quality are homogenized by the flow rate adjusting tank 30; A precision filter (50) for removing fine suspended solids, polymer materials, and colloidal materials from the treated water passing through the activated carbon adsorber (40); An electrodialysis apparatus (60) for concentrating and removing ionic dissolved solids by selective permeation from the treated water passing through the precision filter (50); A chlorine disinfection device 70 for putting chlorine into the treated water passing through the electrodialysis device 60 to prevent the growth of microorganisms and to sterilize it; Characterized in that consisting of; heavy water storage tank (80) for storing the treated heavy water.

In addition, in the water-based water system combined with the dissolved solids removal device according to the second embodiment of the present invention, in the water-based water system according to the first embodiment, the precision filter 50 and the electrodialysis apparatus 60 are fine suspended solids. , It is characterized by consisting of a reverse osmosis filtration device 90 to remove the polymer material, colloidal material and dissolved solids at the same time.

On the other hand, the media 21 is a plurality of culture plates 24 are attached to the outer peripheral surface of the tubular body 23 is firmly supported by the inner support 22 crossed in a '+' shape, the outer support 25, A circular ring-shaped partition 26 is formed in the middle of the tubular body 23 in the middle of the culture plate 24, and a water hole 27 is drilled between the outer wall of the tubular body 23 and the partition 26. It is characterized by the pore quality.

Looking at the water treatment process of the water system in combination with the dissolved solids removal apparatus according to the first embodiment of the present invention as described above are as follows.

First, the wastewater treatment effluent, which is first treated from the wastewater treatment plant and contains low concentrations of organic matter and hardly decomposable dissolved matter, is collected and stored in the reservoir 10 to be supplied to the biofilter 20 which is a device for subsequent treatment. .

The biofilter 20 is a media 21 for the attachment and habitat of microorganisms is filled so that the decomposition of nitrogen, phosphorus and organics from the source water by the formation of a biofilm, wherein the media 21 is By using a special structure having a large specific surface area, excellent microbial adhesion ability, and filtration function as disclosed in the Korean Utility Model Utility Model Publication No. 20-0289920, filed by the applicant, and registered in Korean Registered Utility Model Publication No. 20-0289920, In addition to the decomposition of nitrogen, phosphorus and organic matter in the feed water by the microorganisms attached to the media 21 in the filter 20, the media 21 of the special structure removes a considerable amount of turbidity components and suspended solids in the feed water. This reduces the load on the post-treatment units, thus improving the life of the units as well as compacting the entire system. So that it is easy to screen are preferred. The structure of the media 21 is shown in FIG.

Inside the biofilter 20 may be aeration by the blower 110 to maintain a constant oxygen concentration as needed and to actively grow and activity aerobic bacteria.

The treated water that has passed through the biofilter 20 is equalized in flow rate and water quality by the flow rate adjusting tank 30 to be introduced into the activated carbon adsorber 40 for the next treatment. That is, the flow rate adjustment tank 30 serves to prevent a decrease in processing efficiency of the water supply system, which may occur due to the flow rate of the inflow water and the water quality, and to reduce the operating cost.

Treated water in which the flow rate and water quality are equalized by the flow rate adjusting tank 30 is introduced into the activated carbon adsorber 40, and the remaining hardly decomposable dissolved organic matter, residual chlorine, taste, color, odor and trace amount of the activated carbon having strong adsorption power. Hazardous minerals and the like will be adsorbed and removed.

The water to be treated passing through the activated carbon adsorber 40 flows into the precision filter 50 after the fine suspended matter, the polymer material, and the colloidal material are removed.

Most of the dissolved solids (TDS), which are the main factors for the formation of scale in the pipe, are present in the treated water passing through the precision filter 50 in the state in which suspended substances and fine particles are mostly removed or in an ionic state such as calcium and magnesium. Since it passes through the filtration membrane of the microfilter 50 still remains in the water to be treated, the water to be passed through the microfilter 50 is introduced into the electrodialysis apparatus 60 and these dissolved solids selectively permeate Concentrated and removed.

Here, the electrodialysis apparatus 60 is a device for selectively permeating cations or anions using an ion exchange membrane to classify and concentrate ion species, and a plurality of cation exchange membranes and anions alternately arranged between an anode and a cathode. The separation membrane was separated into dilute water and concentrated concentrated water from which ions were removed.

The treated water that has passed through the electrodialysis apparatus 60 is sterilized by the microorganisms contained therein by the chlorine introduced from the chlorine disinfection device 70 provided in the pipeline during the flow along the water pipe.

The treated water that has completed the above process becomes heavy water having suitable water from which contaminants such as nitrogen, phosphorus, low concentration organics, turbidity components, hardly decomposable dissolved organics, and other dissolved solids are removed, and are stored in the heavy water storage tank 80. .

As described above, in the present embodiment, when the water to be treated passes through the electrodialysis apparatus 60, the dissolved ionic solids, which are the main cause of the generation of scale in the pipes existing in the water to be treated, are concentrated and removed. The heavy water treated by is able to be used as boiler water or sprinkling water, which is not suitable for use in the heavy water treated by the conventional method, and consequently, the use of heavy water can be further expanded.

Meanwhile, in the second embodiment of the present invention, the precision filter 50 and the electrodialysis apparatus 60 are replaced by the reverse osmosis filtration apparatus 90 as shown in FIG. 2, and the reverse osmosis filtration apparatus 90 is configured. ) Is based on the principle of reverse osmosis by applying pressure to the osmotic phenomena existing in nature.The semi-permeable membrane with fine pores of about 5 ~ 15Å (Angstrom) In addition to the material is removed more than 99% of the solid matter (including ionic material) in the source water, and thus serves as both the above-described precision filter 50 and the electrodialysis device (60).

Therefore, even when the reverse osmosis filtration device 90 is provided as in the present embodiment, it is possible to obtain heavy water that can be utilized as boiler water or sprinkling water, as in the above-described first embodiment, thereby increasing the application range of heavy water. Not only will this be maximized, but it will also simplify the system even further.

However, the reverse osmosis filtration device 90 has a disadvantage that the equipment cost is high, and the reverse osmosis pressure must be applied during operation, and a lot of cost is consumed even in the operation such as frequent cleaning due to the contamination of the semi-permeable membrane. In the case of mainly treating feed water having an initial content of suspended solids (SS) in the range of 50 to 150 ppm, the second embodiment of the present invention having a reverse osmosis filtration device 90 having a relatively high effect of removing suspended solids is applied. In the case of mainly processing the feed water in the initial content of the suspended solids range of 5 to 100 ppm, the precision filter 50 and the electrodialysis apparatus 60 of the present invention are provided with more emphasis on equipment and operating costs. It is more preferable to apply the first embodiment. In the case where the initial content of the suspended solids is in the range of 50 to 100 ppm, the first embodiment or the second embodiment may be applied.

The present invention as described above is able to obtain a suitable target water quality as a system of a minimized scale, so that the cost required for installation and maintenance can be reduced as much as possible, and furthermore, by excellent removal ability and high efficiency for various contaminants, In addition to the purpose of heavy water treatment as described above, it can be utilized for advanced treatment of purified water treatment or for advanced treatment of industrial water.

Thus, the heavy water system combined with the dissolved solids removing device according to the present invention is equipped with a device for removing the dissolved solids so that the dissolved solids can be removed from the feed water, thereby utilizing the conventional heavy water. In addition to the use, it is possible to be utilized as boiler water or cooling water for cooling water, which has a relatively long residence time in the pipe, thereby maximizing the utilization of heavy water and thereby contributing to the stable securing of water resources.

Claims (2)

In the sewage water system for recycling waste water or sewage effluent, which is a feed water containing low concentration of organic matter and hardly decomposable dissolved water, into heavy water, A storage tank 10 for collecting and storing supply water; Media filter 21 for the attachment and habitat of microorganisms is filled and the biofilter 20 to simultaneously remove nitrogen, phosphorus, low concentration of organic matter and some turbidity components and suspended solids from the feed water introduced from the reservoir 10 and ; A flow rate adjusting tank 30 which maintains a constant flow rate even when excessively generated water passing through the biofilter 20 and adjusts load variation of contaminants for smooth after-treatment; An activated carbon adsorber (40) for adsorbing and removing hardly decomposable dissolved organic matter, residual chlorine, color, odor and trace amounts of harmful inorganic substances remaining from the treated water having a uniform flow rate and water quality by the flow rate adjusting tank 30; A precision filter (50) for removing fine suspended solids, polymers, and colloidal substances from the water to be treated which has passed through the activated carbon adsorber (40); An electrodialysis apparatus (60) for concentrating and removing ionic dissolved solids by selective permeation from the water to be treated which has passed through the precision filter (50); A chlorine disinfection device 70 for putting chlorine into the treated water passing through the electrodialysis device 60 to prevent the growth of microorganisms and to sterilize it; A heavy water storage system comprising a dissolved solids removal device comprising: a heavy water storage tank (80) for storing the treated heavy water; In the sewage water system for recycling waste water or sewage effluent, which is a feed water containing low concentration of organic matter and hardly decomposable dissolved water, into heavy water, A storage tank 10 for collecting and storing supply water; A biofilter 20 which is filled with a media 21 having a special structure and simultaneously removes low concentrations of organic matter, turbidity components, and suspended solids from the feedwater introduced from the reservoir 10; A flow rate adjusting tank 30 which maintains a constant flow rate even when excessively generated water passing through the biofilter 20 and adjusts load variation of contaminants for smooth after-treatment; An activated carbon adsorber (40) for adsorbing and removing hardly decomposable dissolved organic matter, residual chlorine, color, odor and trace amounts of harmful inorganic substances remaining from the treated water having a uniform flow rate and water quality by the flow rate adjusting tank 30; A reverse osmosis filtration device 90 for removing fine suspended solids, polymer materials, colloidal substances and dissolved solids from the water to be treated which has passed through the activated carbon adsorber 40; A chlorine disinfection device 70 for putting chlorine into the water to be treated that has passed through the reverse osmosis filtration device 90 to prevent the growth of microorganisms and to sterilize it; The heavy water storage tank (80) for storing the treated heavy water by passing through the chlorine disinfection device (70).