KR101688800B1 - Treatment system for reverse osmosis concentrate and method thereof - Google Patents

Abstract

According to an embodiment of the present invention, a treatment system for reverse osmosis concentrates comprises: an optical monitoring unit monitoring conditions of an organic material in reverse osmosis concentrates; a bioreactor storing the concentrates; biomass reacting with the concentrates stored in the bioreactor; a separation membrane filtering unit releasing the concentrates stored in the bioreactor; and an ozone contact tank selectively used according to fraction of easily decomposable organic materials and fraction of non-degradable organic materials in the monitored concentrates through the monitoring unit. The treatment system can be simplified.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reverse osmosis concentrate,

The present invention relates to a reverse osmosis concentrated water treatment system and method, and more particularly, to a system and method for treating reverse osmosis concentrated water, which can simultaneously remove total nitrogen and total phosphorus contained in concentrated water in a single biological reactor using biomass, The present invention relates to a reverse osmosis concentrated water treatment system and method configured to convert concentrated refractory organic substances into degradable organic materials to treat concentrated water.

As one of the most realistic alternative to mitigate water shortages due to recent climate change, reuse of municipal wastewater is regarded as a promising alternative to future water supply.

Reverse osmosis membrane-based process operation is essential for ensuring stable water quality in urban sewage treatment plant reused water, but reverse osmosis treatment, which exceeds the water quality standards of sewage treatment effluent including COD (Organic Substance), TN (Total Nitrogen) and TP As the concentrated water is inevitably generated, a means for separately purifying the reverse osmosis concentrated water is required.

In addition, since the composition of the inorganic nitrogen component in the reverse osmosis concentrated water depends on the characteristics, efficiency, and stability of the municipal sewage treatment process, the concentrated water treatment method using conventional biological processes must achieve both nitrification and denitrification It was possible.

In addition, the low C / N ratio (carbon / nitrogen ratio) in the concentrated water and the organic fraction easily available by the heterotrophic microorganism group are significantly lower than that of the municipal sewage inflow, There is a disadvantage that injection of an organic carbon source is required and operation costs are accordingly increased.

In addition, conventional TP removal method through chemical application technology can expect stable treatment efficiency compared with biological treatment, but separate chemical injection and agitation facilities should be established, and addition of medicines and sludge treatment costs There is a disadvantage that operation cost and inorganic waste are generated.

Furthermore, the salt concentration of the reverse osmosis concentrated water is greatly increased due to the chlorine chemical used by the operator of the treatment facility including most of the reverse osmosis process to prevent membrane contamination, Degradation and degradation of biomass precipitation, thereby increasing COD outflow.

Therefore, the applicant of the present invention has proposed the present invention in order to solve the above-mentioned problems, and related prior art documents include 'Reverse Osmosis Concentrated Water Treatment Apparatus and its Processing Method' of Korea Registered Patent Registration No. 10-1017006, .

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made to solve the above-mentioned problems and it is an object of the present invention to provide a reverse osmosis concentrated water treatment system and method capable of simultaneously removing total nitrogen, total phosphorus and biodegradable organic substances contained in reverse osmosis- Can be provided.

According to an aspect of the present invention, there is provided a reverse osmosis condensed water processing system including an optical monitor unit for monitoring an organic material state in reverse osmosis concentrated water; A bioreactor in which the concentrated water is stored; Biomass reacting with the concentrated water stored in the bioreactor; A separation membrane filtration unit for discharging the concentrated water stored in the bioreactor; And an ozone contact tank selectively used according to the fraction of the degradable organic material and the fraction of the refractory organic material in the concentrated water monitored by the optical monitor unit.

When the fraction of the biodegradable biodegradable organic material in the reverse osmosis concentrated water is larger than the fraction of the biodegradable organic material, the bioreactor intermittently uses artificial light converted into natural sunlight or sunrise time electrical energy, TN, TP and COD can be simultaneously removed using the injected carbon dioxide and the biomass.

Wherein when the refractory organic material in the concentrated water is relatively larger than the degradable organic material, the bioreactor removes radicals from the concentrated water while the natural or artificial light is irradiated to the bioreactor including the concentrated water and the biomass The substance can be removed and the pH of the concentrated water can be increased.

When the biodegradable organic material in the concentrated water is relatively larger than the degradable organic material, the bioreactor stops the flow of the turbid solution in the bioreactor to precipitate the biomass, .

The ozone contact tank may receive the concentrated water from the bioreactor and increase the fraction of the biodegradable organic material by performing an oxidation treatment on the ozone when the refractory organic material in the concentrated water is relatively larger than the degradable organic material.

The bioreactor further includes an agitator and the agitator may remove the radical scavenging substance of the concentrated water stored in the bioreactor and increase the pH in order to increase the efficiency of ozone oxidation treatment of the concentrated water in the ozone contact tank .

The radical scavenging material is removed and the pH is increased to make the alkaline concentrated water flow into the ozone contact tank and the fraction of the biodegradable organic material can be increased by oxidation of the ozone.

Wherein the bioreactor simultaneously removes TN, TP and COD from the concentrated water flowing into the bioreactor through the ozone contact tank, and the alkaline concentrated water by the carbon dioxide mixed with the air maintains a neutral pH . ≪ / RTI >

Under the condition that air is mixed into the bioreactor including the reverse osmosis concentrated water and the biomass and natural light or artificial light is not irradiated or a light shielding phenomenon occurs due to inter-biomass interferences or the light transmittance is restricted for other reasons , The biomass can simultaneously remove COD, TN and TP using the biodegradable organic material from the reverse osmosis concentrated water as an energy source and carbon source.

Also, under the condition that air and carbon dioxide are mixed in the bioreactor including the reverse osmosis concentrated water and the biomass, and the natural light or artificial light is irradiated, the biomass is mixed with the air and used as the carbon source TN and TP can be removed at the same time.

The biomass may comprise one or more algae selected from the group consisting of Scenedesmus, Acutodesmus and Chlorella.

According to another aspect of the present invention, there is provided a reverse osmosis condensed water treatment method using the reverse osmosis concentrated water treatment system, comprising: monitoring a state of an organic substance in the concentrated water; Injecting the concentrated water into the bioreactor; Reacting the biomass with the concentrated water in the bioreactor; Removing TN, TP and COD from the concentrated water reacted with the biomass and adjusting the pH of the concentrated water; Precipitating the biomass; And a step of filtering / discharging the concentrated water in the bioreactor.

Injecting the concentrated water into the bioreactor when the concentration of the composted organic material in the concentrated water is greater than that of the degradable organic material; Removing the radical scavenging material from the concentrated water injected into the bioreactor and increasing the pH; Precipitating the biomass in the bioreactor; And injecting the concentrated water into the ozone contact tank in the bioreactor.

The reverse osmosis concentrated water treatment system and method according to an embodiment of the present invention can simultaneously remove total nitrogen, total phosphorus, and biodegradable organic substances contained in reverse osmosis concentrated water in a single biological reactor, The system can be simplified and the process can be simplified.

In addition, the reverse osmosis concentrated water treatment system and method in accordance with one embodiment of the present invention, by using a biomass with _{NH 4 -N, NO 2 -N,} NO 3 -N in the form of inorganic nitrogen contained in the reverse osmosis concentrated It is not necessary to use an external organic carbon source for denitrification.

Also, the reverse osmosis concentrated water treatment system and method according to one embodiment of the present invention does not require the use of separate chemicals or high-output electrical energy unlike the phosphorus removal method using chemical or electrochemical application techniques.

Also, the system and method for treating reverse osmosis-treated water according to an embodiment of the present invention is different from the conventional oxidation treatment for improving the biodegradability of a decomposable organic material. In addition to ozone treatment, a separate process combination (O ₃ + UV), chemical pH adjustment + O ₃ , O ₃ + H ₂ O ₂ .

1 is a view showing a configuration of a reverse osmosis concentrated water treatment system according to an embodiment of the present invention.
FIG. 2 is a view showing a process of a concentrated water containing a decomposable organic material according to an embodiment of the present invention. FIG.
FIG. 3 is a view illustrating a process of a concentrated water containing a refractory organic material according to an embodiment of the present invention. FIG.
FIG. 4 is a graph showing changes in total phosphorus, total nitrogen, and organic substances included in the concentrated water by the reverse osmosis concentrated water treatment system according to an embodiment of the present invention. FIG.
5 is a flowchart of a reverse osmosis concentrated water treatment method according to an embodiment of the present invention.
FIG. 6 is a graph showing experimental data showing changes in radical consumption and pH when artificial light or natural light is irradiated to a biological reactor according to an embodiment of the present invention. FIG.
FIG. 7 is a graph showing experimental data showing that the COD, TN, and TP included in the concentrated water are simultaneously removed by the reverse osmosis concentrated water treatment system according to an embodiment of the present invention.
FIG. 8 is a graph of experimental data showing the amount of sedimentation change of biomass stored in a bioreactor according to an embodiment of the present invention. FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings.

It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

Hereinafter, a reverse osmosis concentrated water treatment system and method according to an embodiment of the present invention will be described in detail with reference to Figs. 1 to 5. In describing the present invention, a detailed description of known functions and configurations incorporated herein will be omitted so as not to obscure the gist of the invention.

FIG. 1 is a view illustrating a configuration of a reverse osmosis-treated water treatment system according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of a reverse osmosis-treated water treatment system according to an embodiment of the present invention. FIG. 3 is a view showing a process of a concentrated water containing a decomposable organic material according to an embodiment of the present invention, and FIG. 4 is a view showing a process of a reverse osmosis- FIG. 5 is a graph showing changes in total phosphorus, total nitrogen, and organic substances included in the concentrated water by the reverse osmosis concentrated water treatment system according to an exemplary embodiment of the present invention. It is a flowchart.

As shown in FIGS. 1 and 2, the reverse osmosis concentrated water treatment system 100 according to an embodiment of the present invention includes an optical monitor unit 101 for monitoring the state of organic substances in reverse osmosis concentrated water, A biomass 120 that is supplied to the biosubstance 110 and reacts with the concentrated water stored in the biosubstrate 110; And a membrane filtration unit 150 for filtering and discharging the concentrated water stored in the bioreactor 110.

The optical monitor unit 101 may monitor the biological organic material in the reverse osmosis concentrated water supplied to and stored in the biological reaction tank 110 to detect the degradation fraction or the degradation fraction of the organic material contained in the concentrated water .

The optical monitor unit 101 is configured to measure the COD (chemical oxygen demand) of the reverse osmosis concentrated water before the reverse osmosis concentrated water generated in the sewage treatment effluent water reuse system (not shown) is first introduced into the biological reaction tank 110 The degree of biodegradation of the material can be monitored. At this time, it is preferable that the optical monitoring unit 101 uses an optical analysis method for relative quantitative analysis of the degradation fraction of COD and the degradation fraction of COD in the reverse osmosis concentrated water.

The optical monitor unit 101 may include a container (not shown) for keeping the backwashed concentrated water flowing for analyzing the degree of biodegradation of the organic material in the reverse osmosis concentrated water for a certain period of time. In addition, by analyzing the degree of biodegradation of the organic material, a control unit (not shown) for storing whether the fractions of the biodegradable organic material or the refractory organic material is large and controlling the operation of the bioreactor 110 according to the result Time).

The bioreactor 110 may be supplied with reverse osmosis concentrated water from a reverse osmotic pressure purification device (not shown) or a municipal wastewater treatment effluent recycling system. That is, the reverse osmosis concentrated water generated in the reverse osmotic pressure purification device or the municipal sewage treatment effluent water reuse system (not shown) passes through the optical monitor unit 101 and then passes through the bio-reaction tank 110, regardless of the degree of biodegradation of organic materials in the reverse osmosis- Respectively.

The bioreactor 110 is configured to open the upper part of the reverse osmosis concentrated water and the biomass 120 such that the biomass 120 is exposed to the light source unit 104 including the artificial light illumination unit 102 or the natural light 103 Lt; / RTI > The light source unit 104 can intermittently use the artificial light illumination means 102 that has been converted into natural daylight or sunrise time electrical energy.

Here, the bioreactor 110 is preferably in the form of a sludge blanket reactor (SBR).

A first diffuser 114 may be provided at a lower portion of the biological reaction tank 110 and a stirring portion 116 may be provided at an intermediate portion of the biological reaction tank 110. Air and carbon dioxide can be supplied into the bioreactor 110 through the first diffuser 114. The agitation unit 116 is an immersion agitating apparatus in which the biomass 120 having been subjected to the reaction by stirring the reverse osmosis concentrated water in the bioreactor 110 and the biomass 120 in order to facilitate the biological reaction, Can be precipitated to the lower part of the bioreactor (110).

The biomass 120 cultivated in the bioreactor 110 is discharged through a discharge port 112 (see FIG. 1) formed at the lower end of the bioreactor 110, And may be discharged to the biomass collection unit.

Meanwhile, the biomass 120 may be biologically reacted with the reverse osmosis concentrated water supplied to the biological reaction tank 110 from the reverse osmosis purification device or the like.

Here, the biomass 120 may be one or more birds selected from the group consisting of Scenedesmus, Acutodesmus, and Chlorella. The Scenedesmus species may include S. quadricauda, acutus, obliquus, and bijuga. The Acutodesmus species may include obliquus, and the Chlorella species Chlorella speices may include vulgaris.

The biomass 120 may be formed of a mixture of the light emitted from the light source unit 104 and the first diffuser 114 provided in the bioreactor 110, , And can be cultured in the bioreactor (110).

As the amount of biomass increases during the cultivation of the biomass 120, total nitrogen (TN) and total phosphorus (TP) contained in the concentrated water can be removed.

The biomass 120 of the above kind is mixed with air through the first diffuser 114 into the bioreactor 110 including the reverse osmosis concentrated water and the biomass 120, Biodegradable organic materials from the reverse osmosis concentrated water as an energy source and a carbon source under the condition that natural light or artificial light is not irradiated or the light shielding phenomenon occurs due to interferences between biomass or the light transmittance is restricted for other reasons COD, TN and TP can be removed at the same time.

For reference, the first diffuser 114 is connected to an air supply device (not shown) to inject oxygen and carbon dioxide into the bioreactor 110.

Meanwhile, a membrane filtration unit 150 may be provided on one side of the bioreactor 110. The separation membrane filtration unit 150 can receive the concentrated water with reduced total nitrogen, total phosphorus, and organic substances from the bioreactor 110 through the first transfer pump 152 and finally discharge the same. At this time, a concentrated water conveyance pipe (not shown) for connecting the first conveyance pump 152 and the separation membrane filtration unit 150 may be provided with a first valve 157 for controlling the conveyance amount of the concentrated water.

The reverse osmosis concentrated water treated in the bioreactor 110 flows into the membrane filtration unit 150 through the first transfer pump 152 and the treated water passed through the membrane filtration unit 150 is discharged, Can be introduced into the supply part 156. The backwash water supply unit 156 may include a third transfer pump 154 for transferring backwash water to the membrane filtration unit 150. At this time, the backwash water supply pipe (not shown) connecting the third transfer pump 154 and the membrane filtration unit 150 may be provided with a second valve 158 for controlling the amount of backwash water.

Therefore, under the condition that the first transfer pump 152 is stopped and the first valve 157 is closed, the water in the backwash water supply unit 156 is discharged through the third transfer pump 154, (Not shown) connected to the separation membrane filtration unit 150 and the bioreactor 110 through the separation membrane filtration unit 150 in a direction opposite to the concentrated water flow, And may be introduced into the reaction tank 110 again.

Since the structure for cleaning the membrane filtration unit 150 using the treated water in the backwashing water supply unit 156 is a well known structure that can be easily carried out by those skilled in the art, A detailed description thereof will be omitted.

In addition, an ozone contact tank 130 may be provided on one side of the bioreactor 110. 1 and 3, the reverse osmosis concentrated water treatment system 100 according to the embodiment of the present invention includes the decomposable organic material (not shown) in the concentrated water monitored by the optical monitor unit 101, And an ozone contact tank 130 selectively used depending on the fraction of the refractory organic material.

Between the bioreactor 110 and the ozone contact tank 130, the concentrated water stored in the bioreactor 110 is transferred to the ozone contact tank 130 or the concentrated water stored in the ozone contact tank 130 is stored And a second transfer pump 136 for transferring the biomass to the bioreactor 110 may be provided.

The ozone contact tank 130 includes a second diffuser 134 connected to the ozone generator 137 for generating ozone by using oxygen or air and injecting ozone into the ozone contact tank 130, And an ozone flue gas removing unit 132 for destroying or removing the ozone flue gas formed inside the ozone contact tank 130.

When the fraction of the biodegradable organic material in the reverse osmosis concentrated water detected by the optical monitor unit 101 is large, the concentrated water is treated using only the bioreactor 110, Same as.

As shown in FIG. 2 (a), when the organic matter in the reverse osmosis-concentrated water has a large fraction of the biodegradable organic material, the natural light 103 or the artificial light 102 converted into electric energy is supplied (5 ~ 10% v / v) is mixed with air through the first diffuser 114 to grow the biomass 120 and the biomass 120 is stirred with concentrated water It makes enough reaction. In other words, the biomass 120 uses light as an energy source and carbon dioxide as a carbon source during the daylight hours when the natural light 103 or the artificial light 102 is irradiated, (TP) can be removed. At this time, if a light shielding phenomenon occurs, the organic material (COD) can be removed as described below.

Also, at the sunset time, air can be injected into the bioreactor 110 by using the first diffuser 114 connected to the air supply device as shown in FIG. 2 (b). In other words, as shown in Figs. 2A and 2B, when the light is not irradiated by the natural light 103 or the artificial light illuminating means 102, or the light shielding phenomenon occurs due to interference between biomass Biomass 120 is used to convert biomass 120 to total nitrogen (TN), total phosphorus (TP), and organic (TP), which are contained in concentrated water, by using biodegradable organic materials from reverse osmosis concentrated water as an energy source and carbon source, The substance (COD) can be removed. At this time, since the biomass 120 uses oxygen to oxidize and decompose the organic material, only air is injected into the bioreactor 110.

The biomass 120 removes total nitrogen (TN), total phosphorus (TP) and organic matter (COD) contained in the concentrated water by repeating the processes of FIGS. 2 (a) and 2 (b) Lt; / RTI > For reference, FIG. 8 is an experimental data graph showing that sedimentation of biomass (algae) does not deteriorate even after treatment with concentrated water of high salinity (8000 mg / L as Cl < ^- >). Referring to FIG. 8, it can be seen that the settleability of the biomass before the concentrated water treatment and the sedimentation of the biomass after the concentrated water treatment did not change significantly.

In the concentrated water treatment system 100 according to an embodiment of the present invention, when the fraction of the biodegradable organic material in the reverse osmosis concentrated water is large, the amount of (NH ₄ -N, NO ₂ -N, in the form of NO ₃ -N), it is possible to achieve the total nitrogen and total phosphorus and biodegradation process simplified by eliminating at the same time the organic material in a single bioreactor (110).

For reference, Fig. 7 is in the form of inorganic nitrogen contained in the concentrated water by using the reverse osmosis concentrated water treatment system 100 in accordance with one embodiment of the present invention _{(NH 4 -N, NO 2 -N} , NO 3 - N), COD, TN and TP in the concentrated water are removed almost simultaneously. Referring to FIG. 7, it can be seen that COD, TN, and TP decrease at the same time as time elapses.

In addition, there is no need for an external organic carbon source used for denitrification in a conventional biological treatment process, and there is no need to use a separate chemical agent or high-output electrical energy unlike the TP removal method using chemical or electrochemical application techniques. If necessary, radicals such as bicarbonate may be removed from the biological reaction tank 110 by biological treatment without injecting a separate chemical, and an alkaline intermediate treated water may be produced.

If the fraction of the biodegradable organic material in the reverse osmosis concentrated water is large, the bio degradable fraction of the organic material is increased by the process of FIG. 3, and then the process of FIG. 2 is performed.

3 (a) and 3 (b), when the ozone contact tank 130 has a relatively large amount of the degradable organic material in the concentrated water supplied to the bioreactor 110, The concentration of the biodegradable organic material can be increased by receiving the concentrated water from the bioreactor 110 as shown in FIG. That is, when the concentrated water supplied to the bioreactor 110 contains more refractory organic material than the biodegradable organic material, the ozone contact tank 130 transfers the concentrated water from the bioreactor 110 Ozone oxidation treatment can be performed.

When the fraction of the refractory organic matter in the reverse osmosis concentrated water is large, the flow of the turbid solution in the bioreactor 110 is blocked as shown in FIG. 3 (a), so that the biomass 120, And the concentrated water obtained by solid-liquid separation as shown in FIG. 3 (c) is transferred to the ozone contact tank 130 and treated with an ozone oxidation apparatus, whereby the biological degradable fraction can be increased.

3 (a) and 3 (b), by reacting the biomass 120 and the reverse osmosis concentrated water containing an organic substance having a high refractory fraction, it is possible to perform reverse osmosis enrichment The biomass 120 and the concentrated water can be sufficiently reacted by the agitator 116 while the natural light 103 or the artificial light 102 is irradiated to the bioreactor 110 including the water and the biomass 120 An alkaline concentrated water can be obtained by reducing the radical consuming substance (for example, HCO ₃ ^- ) from the concentrated water and increasing the pH of the concentrated water.

3 (c), ozone is supplied to the concentrated water flowing into the ozone contact tank 130 through the second diffuser 134 to perform the ozone altitude oxidation process. Such an ozone-enhanced oxidation process results in an increase in the biodegradable organic material in the concentrated water.

3 (c), the ozone-treated reverse osmosis-concentrated water is transferred to the bioreactor 110 containing the biomass 120, and is subjected to the processes of (a) to (c) The number can be processed.

Removal of residual TN and TP, as well as organic matter that has been converted to biodegradable material in the concentrated water by ozone oxidation, and alkaline concentrated water by the carbon dioxide incorporated with the air can be removed from the alkaline pH, pH can be adjusted. At this time, when the fraction of the refractory organic material in the reverse osmosis concentrated water is large, the pH is adjusted or lowered so that the concentrated water can be neutralized in the process of FIG. 2 (a) 2 (a), which is performed when the fraction of the biodegradable organic material is large.

The concentrated water withdrawn from the bioreactor 120 by the flow of the turbid liquid in the bioreactor 110 may be discharged as it is or may be finally discharged through a conventional separation membrane filtration unit 150 configured separately .

3 (a), the concentrated water containing the refractory organic material stored in the bioreactor 110 is supplied to the agitator 116 provided in the bioreactor 110 The biomass 120 may be agitated.

The agitator 116 can increase the pH of the concentrated water stored in the bioreactor 110 to obtain the concentrated water of alkaline water and reduce the amount of the radical consumed. That is, the concentrated water stored in the bioreactor 110 can be changed to an alkali property to promote the radical reaction. In other words, the agitator 116 may increase the ozone oxidation efficiency of the concentrated water in the ozone contact tank 130.

The stirrer 116 is operated until the concentrated water stored in the bioreactor 110 has a predetermined pH. The bioreactor 110 is provided with a pH monitor (not shown) for monitoring the pH of the concentrated water City) can be provided. Accordingly, when the pH of the concentrated water is received from the pH monitor unit, the stirring unit 116 stops operating when the desired pH is concentrated.

When the pH of the concentrated water is increased to a predetermined value by the stirring unit 116, the stirring unit 116 stops driving, as shown in FIG. 3 (b), and the biomass 120 Can be precipitated to the lower part of the bioreactor (110). The alkaline concentrated water whose pH is increased in the bioreactor 110 may be transferred to the ozone contact tank 130 through the second transfer pump 136.

The concentrated water transferred to the ozone contact tank 130 may be subjected to ozone oxidation treatment by ozone to increase the biodegradable fraction. Accordingly, the concentrated water, in which most of the refractory organic material is occupied, can be changed to the concentrated water in which the degradable organic material occupies the most part in the ozone contact tank 130.

The concentrated water subjected to the ozone oxidation treatment in the ozone contact tank 130 may be transferred to the bioreactor 110 again.

The concentrated water conveyed to the bioreactor 110 is supplied to the bioreactor 110 in the natural light 103 or in the daylight hour, The total nitrogen (TN) and total phosphorus (TP) can be removed by the light energy irradiated by the artificial light illuminating means 102 converted into the first diffuser 114 and the carbon dioxide injected with the air from the first diffuser 114. Here, the concentrated water conveyed to the bioreactor 110 has alkalinity and can be adjusted to a neutral pH that can be discharged by the carbon dioxide injected from the first diffuser 114 with air.

The biomass 120 precipitated in the lower portion of the bioreactor 110 is separated from the bioreactor 110 by the light energy provided from the light source unit 104 and the air and carbon dioxide discharged from the first diffuser 114, And react with the concentrated water.

Next, as shown in FIG. 2 (b), in the condition that light is not irradiated by the natural light 103 or the artificial light illuminating means 102, or light shielding phenomenon occurs due to interference between biomass, reverse osmosis enrichment Total nitrogen (TN), total phosphorus (TP) and organic matter (COD) contained in the concentrated water can be simultaneously removed by using biodegradable organic materials from water as an energy source and carbon source.

2 (c), the concentrated water from which total nitrogen, total phosphorus, and organic substances have been removed from the bioreactor 110 is transferred to the separation membrane filtration unit 150 to be discharged into a river or a river can do.

As described above, the reverse osmosis concentrated water treatment system 100 according to an embodiment of the present invention includes a bioreactor 110 including the reverse osmosis concentrated water and the biomass 120 prior to the ozone oxidation treatment of the reverse osmosis concentrated water, (For example, HCO ₃ ^- ) is reduced from concentrated water while the pH of the concentrated water is increased while natural or artificial light is irradiated under the condition that air and carbon dioxide are not injected into the concentrated water, thereby obtaining an alkaline concentrated water. Further, under the condition that natural or artificial light is irradiated to the bioreactor 110 containing the reverse osmosis concentrated water and the biomass, and at the same time, the biomass is maintained under the condition that the carbon dioxide is mixed, thereby removing TN and TP from the reverse osmosis concentrated water Can be achieved at the same time.

6, when the artificial light or the natural light is irradiated for 24 hours or 48 hours under the condition that no air and carbon dioxide are injected into the bioreactor 110 including the concentrated water and the biomass, ≪ / RTI > is shown. As shown in FIG. 6, as the irradiation time of artificial light or natural light is increased, the amount of radical consuming material is decreased and the pH is increased.

Accordingly, the reverse osmosis concentrated water treatment system 100 according to an embodiment of the present invention monitors the decomposable organic substance and the refractory organic substance contained in the concentrated water and, according to the result, The biodegradable fraction of the concentrated water can be increased by selectively using the portion 116 so that the radical consuming material can be removed without injecting a separate chemical into the bioreactor 110 only by the biological treatment, It is possible to generate a process number.

In addition, in addition to the non-degradable organic substances contained in the reverse osmosis concentrated water itself, the organic matter substances secreted due to the growth of the biomass are decomposed with a lower oxidizing agent amount compared to the conventional high-level oxidation process, .

4 is experimental data showing that COD, TN, and TP in the reverse osmosis concentrated water in the single bioreactor 110 are almost simultaneously removed using the reverse osmosis concentrated water treatment system 100 according to an embodiment of the present invention . Referring to FIGS. 4 (a) to 4 (c), it can be seen that COD, TN and TP decrease simultaneously until 40 hours.

Hereinafter, a reverse osmosis concentrated water treatment method according to an embodiment of the present invention will be described with reference to FIG.

The method for treating reverse osmosis concentrated water according to an embodiment of the present invention includes the steps of monitoring 1000 organic substances in concentrated water, injecting the concentrated water into the bioreactor 110, A step 1210 of reacting the biomass 120 and the concentrated water in the bioreactor 110 and removing TN, TP and COD from the concentrated water reacted with the biomass 120 and adjusting the pH of the concentrated water A step 1230 of precipitating the biomass 120 and a step 1240 of filtering / discharging the concentrated water in the bioreactor 110.

In the step 1000 of monitoring the state of the organic material in the concentrated water, the organic material state of the concentrated water supplied to the biological reaction tank 110 may be monitored using the optical monitor unit 101. If the concentrated water contains more degradable organic material (i.e., biodegradable organic material) than the degradable organic material, step 1200 of injecting the concentrated water into the bioreactor 110 and mixing the biomass 120 And a step 1210 of reacting the concentrated water.

In the step 1220 of removing TN, TP, and COD from the concentrated water reacted with the biomass 120 and adjusting the pH of the concentrated water, the light energy from the light source unit 104 and the first diffuser The biomass 120 can be cultivated using air and carbon dioxide injected into the bioreactor 110 at a predetermined time. Therefore, in step 1220 of removing total nitrogen, total phosphorus, and organic substances from the concentrated water reacted with the biomass 120 and adjusting the pH of the concentrated water, the biomass 120 is cultured, Total nitrogen (TN), total phosphorus (TP) and organic matter (COD) are removed.

Next, in the step 1230 of precipitating the biomass 120, light energy, air, and carbon dioxide are not supplied to the bioreactor 110 as shown in FIG. 2 (c). In such a state, the biomass 120 may be precipitated in the lower part of the bioreactor 110.

In step 1240 of filtering / discharging the concentrated water in the bioreactor 110, the total nitrogen (TN), total phosphorus (TP) and organic matter (COD) are removed by the separation membrane filtration unit 150 Concentrated water may ultimately be discharged to rivers or rivers.

Meanwhile, in the method for treating reverse osmosis-treated water according to an embodiment of the present invention, when the concentration of the hardly decomposable organic substance in the concentrated water is greater than the amount of the decomposable organic substance in the step 1000 of monitoring the state of the organic substance in the concentrated water A step 1300 of injecting the concentrated water into the biological reaction tank 110, and a step 1310 of removing the radical waste material from the concentrated water injected into the biological reaction tank 110 and increasing the pH thereof. A step 1320 of precipitating the biomass 120 in the bioreactor 110 and a step 1330 of injecting concentrated water into the ozone contactor 130 in the bioreactor 110.

(1300) injecting the concentrated water into the bioreactor (110) when the concentrated water contains more of the biodegradable organic material than the biodegradable organic material; (Step 1200) of injecting the concentrated water into the bioreactor 110 when the concentration of the biodegradable organic material in the concentrated water is greater than that of the biodegradable organic material, (Step 1230) of precipitating the biomass 120 in the first reactor 110, detailed description thereof will be omitted below.

In the step 1310 of removing the radical scavenging material from the concentrated water injected into the biological reaction tank 110 and increasing the pH thereof, the biomass 120, The concentrated water can be stirred.

Then, the pH of the concentrated water stored in the bioreactor 110 is increased and the radical scavenging substance can be removed. That is, in step 1310, the concentrated water stored in the bioreactor 110 may be changed to alkaline.

In the step 1330 of injecting the concentrated water into the ozone contact tank 130, radical waste materials are removed from the bioreactor 110 and the concentrated water having increased pH may be transferred to the ozone contact tank 130 . That is, in the step 1330, the concentrated water stored in the ozone contact tank 130 is subjected to ozone oxidation treatment to increase the biodegradable fraction. Accordingly, the concentrate water, which occupies most of the refractory organic material, The substance can be changed to a concentrated water which occupies the most part.

Further, the step 1330 may be connected to the steps 1200, 1210, 1220, 1230, and 1240 that were performed when the degradable organic material is larger in the concentrated water than the degradable organic material. That is, the concentrated water that has been subjected to the ozone oxidation treatment in the step 1330, that is, the concentrated water more than the degradable organic material is returned to the bioreactor 110, , 1230, and 1240 can be sequentially discharged to a stream or a river.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments.

Therefore, the scope of the present invention should not be limited by the described embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

100: Reverse Osmosis Concentrated Water Treatment System
101: Optical monitor part 104: Light source part
110: Bioreactor 114: First diffuser
120: Biomass 130: Ozone contact tank
132: ozone flue gas removing unit 134: second diffuser
150:

Claims (13)

An optical monitor unit for monitoring the state of organic substances in the reverse osmosis concentrated water;
A bioreactor in which the concentrated water is stored;
Biomass reacting with the concentrated water stored in the bioreactor;
A separation membrane filtration unit for discharging the concentrated water stored in the bioreactor; And
An ozone contact tank selectively used depending on the fraction of the degradable organic material and the fraction of the refractory organic material in the concentrated water monitored by the optical monitor unit;
, ≪ / RTI &
When the fraction of the biodegradable biodegradable organic material in the reverse osmosis concentrated water is larger than the fraction of the biodegradable organic material, the bioreactor intermittently uses artificial light converted into natural sunlight or sunrise time electrical energy, TN, TP and COD are simultaneously removed using the injected carbon dioxide and the biomass,
Wherein when the refractory organic material in the concentrated water is relatively larger than the degradable organic material, the bioreactor removes radicals from the concentrated water while the natural or artificial light is irradiated to the bioreactor including the concentrated water and the biomass Removing the substance and increasing the pH of the concentrated water.
delete delete The method according to claim 1,
When the biodegradable organic material in the concentrated water is relatively larger than the degradable organic material, the bioreactor stops the flow of the turbid solution in the bioreactor to precipitate the biomass, Wherein the reverse osmosis concentrated water treatment system comprises:
5. The method of claim 4,
The ozone-
Wherein when the degradable organic material in the concentrated water is relatively larger than the degradable organic material, concentrated water is received from the bioreactor and the ozone is oxidized to increase the fraction of the biodegradable organic material system.
6. The method of claim 5,
The bioreactor further includes a stirring part,
Wherein the agitator removes radical scavenging substances of the concentrated water stored in the bioreactor and increases the pH of the concentrated water to increase the efficiency of ozone oxidation treatment of the concentrated water in the ozone contact tank.
6. The method of claim 5,
Wherein the concentration of the biodegradable organic material is increased by oxidation of the ozone by introducing the concentrated water that has become alkaline due to the removal of the radical wastes and the pH thereof into the ozone contact tank.
8. The method of claim 7,
Wherein the bioreactor simultaneously removes TN, TP and COD from the concentrated water flowing into the bioreactor via the ozone contact tank,
Characterized in that the alkaline concentrated water is regulated to have a neutral pH during the treatment by the carbon dioxide incorporated with the air.
The method according to claim 1,
Under the condition that air is mixed into the bioreactor including the reverse osmosis concentrated water and the biomass and natural light or artificial light is not irradiated or a light shielding phenomenon occurs due to inter-biomass interferences or the light transmittance is restricted for other reasons Wherein the biomass removes COD, TN and TP simultaneously using a biodegradable organic material from the reverse osmosis concentrated water as an energy source and a carbon source.
10. The method of claim 9,
Wherein the biomass comprises:
Characterized in that it comprises at least one algae selected from the group consisting of Scenedesmus, Acutodesmus and Chlorella.
10. The method of claim 9,
Under the condition that air and carbon dioxide are mixed into the bioreactor including the reverse osmosis concentrated water and the biomass and natural light or artificial light is irradiated at the same time, the biomass is mixed with the air, And the TP are removed at the same time.
11. A reverse osmosis concentrated water treatment method using the reverse osmosis concentrated water treatment system according to any one of claims 1 and 4 to 11,
Monitoring the state of the organic material in the concentrated water;
Injecting the concentrated water into the bioreactor;
Reacting the biomass with the concentrated water in the bioreactor;
Removing TN, TP and COD from the concentrated water reacted with the biomass and adjusting the pH of the concentrated water;
Precipitating the biomass; And
And filtering / discharging the concentrated water in the bioreactor.
13. The method of claim 12,
In the step of monitoring the state of the organic material in the concentrated water, when the concentrated water contains more of the degradable organic material than the degradable organic material,
Injecting the concentrated water into the bioreactor;
Removing the radical scavenging material from the concentrated water injected into the bioreactor and increasing the pH;
Precipitating the biomass in the bioreactor; And
(1330) injecting the concentrated water into the ozone contact tank in the bioreactor.

Images