JP3909793B2 - Method and apparatus for treating organic wastewater containing high-concentration salts - Google Patents

Method and apparatus for treating organic wastewater containing high-concentration salts Download PDF

Info

Publication number
JP3909793B2
JP3909793B2 JP25326699A JP25326699A JP3909793B2 JP 3909793 B2 JP3909793 B2 JP 3909793B2 JP 25326699 A JP25326699 A JP 25326699A JP 25326699 A JP25326699 A JP 25326699A JP 3909793 B2 JP3909793 B2 JP 3909793B2
Authority
JP
Japan
Prior art keywords
treatment
reverse osmosis
electrodialysis
organic wastewater
concentration
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP25326699A
Other languages
Japanese (ja)
Other versions
JP2001070989A (en
Inventor
昇 勝倉
康成 小島
Original Assignee
株式会社荏原製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社荏原製作所 filed Critical 株式会社荏原製作所
Priority to JP25326699A priority Critical patent/JP3909793B2/en
Publication of JP2001070989A publication Critical patent/JP2001070989A/en
Application granted granted Critical
Publication of JP3909793B2 publication Critical patent/JP3909793B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • Y02A20/128
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124Water desalination
    • Y02A20/131Reverse-osmosis
    • Y02A20/134

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a treatment method for desalinating organic salts from organic wastewater containing high-concentration salts to remove organic substances, and particularly organic materials having a high salt concentration such as landfill leachate and human waste. The present invention relates to a treatment method that can be used for advanced treatment of wastewater, desalination treatment, concentration and recovery of salt substances, recovery and reuse of treated water, and the like.
[0002]
[Prior art]
Organic wastewater having a high salt concentration such as waste landfill leachate generally contains a high concentration of salts such as calcium ions and pollutants such as organic matter. Often, the biochemical oxygen demand (BOD) or chemical oxygen demand (COD) is high, contains many suspended solids (SS), and has chromaticity caused by colloidal materials. For this reason, they cannot usually be reused directly for some purpose or discharged directly into rivers. As such a method for treating organic wastewater, conventionally, a treatment method mainly using removal of organic pollutants has been used. The main treatment methods include, for example, biological treatment for the purpose of removing BOD, coagulation sedimentation treatment for the purpose of removing chromaticity, COD and SS, sand filtration and microfiltration for the purpose of removing turbidity such as SS. There is a membrane (MF membrane) treatment. Furthermore, there is a method using ozone or activated carbon in general as an advanced treatment method.
[0003]
[Problems to be solved by the invention]
The organic wastewater treatment method described above has reached a technical level that allows organic components such as BOD and COD to be sufficiently removed by combining these treatments. However, organic wastewater generally contains various salts in addition to organic substances, and in some cases may contain a considerably high concentration of salts. When treating such wastewater and discharging it to rivers, etc., it is necessary to consider the protection of the water quality of the discharge water area and the effect on agricultural water. Recently, in addition to organic pollutants, especially such salts There is a growing need to remove them from wastewater together. All of the conventional methods for purifying organic wastewater are mainly intended to remove the organic pollutant components therein, so there is no effect of removing salts, and the salt concentration of the treated water is almost the same as the inflowing raw water. It is about.
[0004]
A treatment method for removing salts from an aqueous phase containing salts is a technique well known per se, and examples thereof include a reverse osmosis method, an electrodialysis method, and an evaporation method. The reverse osmosis method has a drawback that the efficiency depends on the salt concentration of the salt water. When the concentration of saline water is high, the recovery rate of demineralized water is low. For example, when desalting a 3.5 wt% NaCl aqueous solution, even if the treatment pressure is 60 kgf / cm 2 , the water recovery rate is 35 to 40% at the highest. In order to increase the water recovery rate to 50% or more, the operating pressure must be 70 kgf / cm 2 or more. However, such pressure not only increases the processing cost, but also has its limitations when considering the lifetime of the reverse osmosis processing apparatus. Furthermore, if the salt water contains calcium ions at a high concentration, there is a risk that calcium scale is deposited on the surface of the semipermeable membrane. Even if the salt concentration is relatively low, it becomes difficult to treat the treated water at a high recovery rate due to a decrease in the amount of permeated water due to precipitation of calcium scale on the semipermeable membrane surface.
[0005]
In electrodialysis, basically a high water recovery rate can be obtained. However, when the water to be electrodialyzed contains calcium ions at a high concentration, calcium scale is deposited in the apparatus. In particular, in the electrodialysis method, a calcium scale is easily generated due to a change in pH accompanying the movement of hydrogen ions from the anode and hydroxide ions from the cathode. It is the same as in the case of the reverse osmosis method that the high water recovery rate cannot be obtained if the calcium scale is deposited. Moreover, since organic substances such as COD cannot be removed by this method, it is necessary to remove organic substances by other treatment methods such as an activated carbon treatment method in order to obtain high-quality treated water. Further, since the evaporation method is a method involving phase change of the system, there is a problem that the required energy is large and the processing cost is greatly increased. Furthermore, if the waste water contains volatile organic substances, ammonia nitrogen (NH 4 -N), etc., they may be mixed in the treated water, and there is a problem that it is difficult to obtain good quality treated water.
[0006]
In addition, metals such as heavy metals cannot be removed effectively by any of the softening treatment, biological treatment, agglomeration treatment, sand filtration treatment, and microfiltration membrane treatment. To remove heavy metals effectively, There is a problem in that heavy metals are contained in the recovered salt concentrated by reverse osmosis membrane treatment or electroosmosis treatment, which must be performed by adsorption with a chelate resin, which selectively forms a strong complex with ions. there were.
[0007]
The present invention has been made in view of such conventional problems, and is efficient to such an extent that organic wastewater containing a high concentration of salts can be treated and reused or directly discharged into a river or the like. When purifying well, not only organic components can be removed sufficiently, but also salts can be removed sufficiently, and purification can be performed without causing problems such as precipitation of calcium scale during the treatment. It is an object of the present invention to provide a method that can obtain treated water that does not contain heavy metals having a low salt concentration with high efficiency and can also recover the recovered salt content.
[0008]
[Means for Solving the Problems]
As described above, chelate resins are widely used as the most advanced tertiary treatment technique in the heavy metal-containing wastewater treatment field.
The present inventors have examined the combination of such heavy metal adsorption technology and various separation technologies used in conventional methods for treating organic wastewater containing high-concentration salts, and conducted reverse osmosis membranes and electrodialysis. It has been found that heavy metals can be effectively adsorbed and separated by arranging heavy metal adsorption means either before or after the membrane separation means using a membrane, and the present invention has been completed.
[0009]
That is, this invention solved the said subject with the processing method and apparatus of the following organic wastewater.
(1) Organic wastewater containing high-concentration salt is softened to reduce the calcium concentration therein, then selected from the group consisting of biological treatment, coagulation treatment, sand filtration treatment, and microfiltration membrane treatment One or more treatments or a combination of two or more treatments are performed, followed by desalting with a reverse osmosis membrane and / or an electrodialysis membrane, and further evaporating and drying the remaining reverse osmosis membrane concentrated water or electrodialysis membrane concentrated water In the method for treating organic wastewater recovered as a solid matter, the heavy metal is removed before or after the desalting treatment by the reverse osmosis membrane and / or the electrodialysis membrane, A method for treating organic wastewater containing high-concentration salts, characterized in that salt content not contained is recovered as a solid.
(2) The method for treating organic wastewater containing high-concentration salts as described in (1) above, wherein adsorption treatment with a chelate resin is performed as the heavy metal removal treatment.
[0010]
(3) In a wastewater treatment apparatus that treats organic wastewater containing high-concentration salts and collects salt content that does not contain heavy metals as solids, a softening treatment apparatus connected to a treated water inflow pipe 1 that supplies organic wastewater 2, biological treatment device 3 on its discharge side, then agglomeration microfiltration device 4, further heavy metal removal device 5, reverse osmosis treatment device 6 provided with reverse osmosis treatment permeate drainage pipe 7 on its discharge side, and its concentration An electrodialysis treatment device 8 provided with an electrodialysis desalination treatment water return pipe 9 to the reverse osmosis treatment device 6 on the water discharge side, and evaporation drying for converting a salt content not containing heavy metals into a solid matter on the concentrated water discharge side A wastewater treatment apparatus for recovering salinity, comprising a treatment apparatus 10.
(4) A softening treatment apparatus connected to a treated water inflow pipe 11 for supplying organic wastewater in a wastewater treatment apparatus that treats organic wastewater containing high-concentration salts and collects salt content that does not contain heavy metals as solids. 12, a biological treatment device 13 on the discharge side, a coagulation microfiltration device 14, a reverse osmosis treatment device 15 provided with a reverse osmosis treatment permeate drainage pipe 16 on the discharge side, and a reverse osmosis on the concentrated water discharge side An electrodialysis treatment device 17 provided with an electrodialysis desalination treatment water return pipe 18 to the treatment device 15, a heavy metal removal device 19 on the concentrated water discharge side, and evaporative drying for converting a salt content not containing heavy metal into a solid matter. A wastewater treatment apparatus for recovering salinity, comprising a treatment apparatus 20.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic view showing an embodiment of a treatment apparatus for performing the wastewater treatment method of claim 1 according to the present invention. The organic wastewater treatment apparatus shown in FIG. 1 is provided with a softening treatment apparatus 2 connected to a treated water inflow pipe 1 for supplying the organic wastewater, and a biological treatment apparatus 3 and a coagulation microfiltration apparatus 4 ( In the figure, “aggregated MF filtration device 4” is provided). The agglomeration microfiltration device 4 is a device that filters the water produced by adding an inorganic flocculant or the like to the biologically treated water discharged from or within the biotreatment device 3 through a microfiltration membrane (MF membrane). is there. The outlet of the filtration treated water pipe of the coagulation microfiltration device 4 is connected to a chelate resin tower which is a heavy metal removing device 5, and the outlet of the treated water pipe is opened to the reverse osmosis treatment device 6.
[0012]
From this reverse osmosis treatment device 6, a reverse osmosis concentrated water pipe and a reverse osmosis treatment permeated water drain pipe 7 are separately provided. The reverse osmosis concentrated water piping from the reverse osmosis treatment device 6 extends to the electrodialysis treatment device 8. From this electrodialysis treatment device 8, an electrodialysis concentrated water pipe and an electrodialysis desalination treatment water return pipe extend separately, and the electrodialysis desalination treatment water return pipe 9 has its outlet connected to the reverse osmosis treatment device 6. The electrodialysis concentrated water pipe is connected to the pipe and reaches the evaporative drying treatment apparatus 10.
[0013]
Moreover, FIG. 2 is the schematic which shows one embodiment of the processing apparatus which performs the wastewater treatment method of Claim 4 concerning this invention. The organic wastewater treatment apparatus shown in FIG. 2 is different from the apparatus shown in FIG. 1 in that the heavy metal removal device is arranged in a reverse arrangement before and after membrane separation processing including reverse osmosis treatment and electrodialysis treatment. Therefore, the repeated explanation is omitted.
[0014]
In the present invention, the organic wastewater to be treated can be treated even if it is not so high as an organic component, and when the organic component enters the electrodialysis treatment, it has an adverse effect. Can be removed in a reverse osmosis process. Moreover, the salt concentration in the organic wastewater is not necessarily intended to have a significantly high concentration, and as described above, the salt concentration is high enough to hinder the release, or higher than that. It is suitable for targeting high concentrations. The organic wastewater treatment method of the present invention may be carried out, for example, as follows using such an apparatus. Organic wastewater containing salts at a high concentration is introduced into the softening treatment device 2 from the treated water inflow pipe 1 to perform the softening treatment. The softening treatment is performed by a method in which the hard water component (slightly soluble salt forming component) of calcium or magnesium in water is replaced with a readily soluble forming component such as sodium by, for example, lime soda softening method or ion exchange hard water softening method. Can do. By this softening treatment, it is possible to effectively prevent the calcium scale from being generated in the reverse osmosis treatment device 6 or the electrodialysis treatment device 8.
[0015]
The wastewater from which calcium ions have been removed in this way is then introduced into the biological treatment device 3 and the coagulation microfiltration device 4 to remove most of the organic contaminants. Specific examples of the biological treatment method performed by the biological treatment apparatus 3 include a biological digestion denitrification method in addition to a standard activated sludge method. BOD can be reduced by using these methods. Specifically, the aggregation microfiltration (aggregation MF membrane filtration) treatment method performed by the aggregation microfiltration device 4 is performed by filtering the aggregate obtained by adding an inorganic coagulant to biologically treated water as described above. You can give a way to do. When such a method is used, particularly turbidity such as SS can be removed from waste water.
[0016]
The wastewater that has been subjected to the organic matter removal treatment is then led to the heavy metal removal device 5, then the reverse osmosis treatment device 6, and further to the electrodialysis treatment device 8 for salt removal treatment. In the electrodialysis treatment apparatus 8, the treatment can be performed batchwise or continuously. Then, the agglomerated microfiltration device 4 leads to the heavy metal removal device 5 to remove heavy metals harmful to industrial salt and snow melting agent, and from there to the reverse osmosis treatment device 6, where reverse osmosis treatment is performed. In the reverse osmosis treatment, a mechanical pressure of 3 Mpa or more is applied to separate the reverse osmosis concentrated water and the reverse osmosis treated water, and the desalted reverse osmosis treated water is discharged through the reverse osmosis treated water pipe 7.
[0017]
When this reverse osmosis treatment is performed, the reverse osmosis concentrated water can be a highly concentrated salt water having a high concentration of evaporation residue components, and the salt in the wastewater can be concentrated, which is efficient. The reverse osmosis concentrated water is introduced from the reverse osmosis treatment device 6 to the electrodialysis treatment device 8.
[0018]
In electrodialysis treatment (also called “ED treatment”), a large number of electrodialysis membranes are arranged, reverse osmosis concentrated water is supplied to alternately formed concentration chambers and dilution chambers, energized, and high concentration is supplied to the concentration chambers. Electrodialyzed concentrated water is obtained, and low-concentration electrodialyzed water is obtained in the dilution chamber. The electrodialysis treatment may be performed batchwise. When carried out batchwise, the salt concentration ratio between the desalted low-concentration electrodialysis treatment and the electrodialyzed concentrated water can be made 150 or more, and the evaporation residue component concentration is 13% or more (130,000 mg / liter or more). Dialysis concentrated water can be obtained. Both the desalination rate and the treatment efficiency are higher than when the batch treatment is a continuous treatment. In this case, 99% or more of salts are usually removed from the electrodialysis desalted water separated from the electrodialyzed concentrated water, and the salt concentration is reduced to 1000 mg / liter or less.
[0019]
The electrodialysis desalted water is returned to the pipe to the reverse osmosis treatment device 6 through the electrodialysis desalted water return pipe 9. Any remaining organic matter is filtered by the reverse osmosis treatment device 6. The electrodialyzed concentrated water is led from the electrodialyzed concentrated water pipe to the evaporative drying treatment apparatus 10 and separated into water and salts by evaporating and drying, and the salts are isolated. As described above, reverse osmosis concentrated water having a high concentration can be recovered in a reduced volume. Next, the electrodialysis treatment is performed on such a reduced volume reverse osmosis concentrate.
[0020]
Therefore, the quantitative burden of the electrodialysis treatment is not large, and the amount of water to be treated is further reduced even in the subsequent evaporation drying treatment. Even an evaporation drying process requiring a large amount of energy with a phase change can be carried out efficiently, and the salt component can be easily isolated as a solid component. The low-concentration electrodialysis desalted water generated by the electrodialysis treatment is refluxed to the reverse osmosis treatment device 6, and the reverse osmosis treatment water is treated by the reverse osmosis treatment. Even if it remains, it hardly flows into the reverse osmosis treated water. In the above embodiment, the biological treatment method and the coagulation microfiltration membrane treatment method are adopted for the removal of the organic matter, but other methods are actually adopted if the organic matter can be sufficiently removed. May be. For example, a coagulation sedimentation method or a sand filtration method may be employed. According to the coagulation sedimentation processing method, chromaticity, SS, etc. can be removed and COD can be lowered. According to the sand filtration method, turbidity such as SS can be removed.
Although FIG. 1 shows a case where both the reverse osmosis treatment device 6 and the electrodialysis treatment device 8 are provided, the concentration of organic substances is low in the previous stage of the reverse osmosis treatment device 6, or the electrodialysis treatment device. If it is not necessary to use both devices together because the salt concentration is not so high in the previous stage of 8, only one of them may be used.
[0021]
In the above description, the process shown in FIG. 1 was described in detail. However, as described above, in the process shown in FIG. 2, whether the heavy metal removing device is placed before or after the membrane separation process. Therefore, the detailed description will not be repeated.
[0022]
Next, as described above, the present invention not only obtains high-efficiency treated water having a low salt concentration, but also aims to recycle the recovered salt content. Will be described in detail.
Industrial salt and snow-melting agent can be considered as the reuse of the recovered salt. At that time, if heavy metal is contained, it cannot be reused as it is because it is harmful. Therefore, removal of heavy metals has become an indispensable problem.
[0023]
By the way, the feature of the chelate resin is that it has a high selective capture performance with respect to a specific metal including a heavy metal, and exhibits a good capture performance even from a low concentration solution.
Thus, in a method for treating organic wastewater containing high-concentration salts, if pretreated water is concentrated by reverse osmosis treatment and electrodialysis treatment, and further solidified by evaporation and drying treatment, A trace amount of heavy metal contained in the solid matter is contained in the solid matter, and it is difficult to reuse the solid matter.
For this reason, the salt content which does not contain a heavy metal can be obtained as a solid substance by carrying out the concentration after removing the heavy metal by an adsorption treatment with a chelate resin before the concentration of the salt content.
Further, after concentration by reverse osmosis treatment and electrodialysis treatment, and removal of heavy metal by evaporative drying after adsorption drying with a chelate resin before evaporation and drying, salt content not containing heavy metal can be obtained as a solid.
That is, according to the present invention, the heavy metal removal of the recovered salt is achieved by utilizing the above-mentioned characteristics of the chelate resin, and the recovered salt solid is successfully reused.
[0024]
In addition, as a removal method of the heavy metal by chelate resin, the adsorption process in a chelate resin tower and the aggregation precipitation process by liquid chelate resin can be considered.
It is known that the removable concentration (mg / liter) of various metals by the chelate resin is as follows.
[0025]
In addition to the use in the soda industry, the industrial salt as an application of the recovered salt solids includes uses such as ceramic waggles, soap salting out, and cryogen.
The recovered salt used in the soda industry is required to have high purity as NaCl. The target composition value of industrial salt is shown as follows (content is expressed in mg / kg).
Composition component Content Na 378,000-389,000
K 100-300
Ca 200-1200
Mg 100-500
Cl 586,000-599,000
SO 4 1,000-3,200
[0026]
【Example】
EXAMPLES Hereinafter, although this invention is demonstrated concretely based on an Example, this invention is not restrict | limited by these Examples.
[0027]
Example 1
The organic wastewater treatment apparatus shown in FIG. 1 was used to treat organic wastewater containing high-concentration salts. That is, waste landfill leachate wastewater was treated and the soluble substances contained were separated as solids. Each component analysis of the treated water ("heavy metal treated water") after adsorption in the chelate resin tower as a heavy metal treatment apparatus and the solid after the evaporative drying treatment was performed. The measurement results are shown in Table 1.
From the results in Table 1, it can be seen that the content of heavy metals such as copper, chromium, lead, cadmium and zinc is reduced, and the recovered salt can be reused as industrial salt.
[0028]
[Table 1]
[0029]
Comparative Example 1
In the processing apparatus shown in FIG. 1, waste landfill leachate wastewater was processed without passing through the chelate resin tower, and the dissolved biomaterials contained were separated as solids.
The concentrations of the components in the solid are shown in Table 2.
According to Table 2, it can be seen that the content of heavy metals such as copper, chromium, lead, zinc and the like is large as compared with Example 1, and it is difficult to reuse the recovered salt as an industrial salt.
[0030]
[Table 2]
[0031]
Example 2
Using the organic wastewater treatment apparatus shown in FIG. 2, the same waste landfill leach wastewater as in Example 1 was treated, and the contained soluble substances were separated as solids. The components of the treated water after adsorption in the chelate resin tower (“heavy metal treated water”) and the solid after the evaporative drying treatment were analyzed. The measurement results are shown in Table 3.
From the results in Table 3, it can be seen that the content of heavy metal is reduced as in Example 1, and the recovered salt can be reused as an industrial salt.
[0032]
[Table 3]
[0033]
【The invention's effect】
According to the present invention, organic wastewater containing high-concentration salts is subjected to softening treatment in advance to lower the calcium dissolution concentration, remove organic matter, and then perform reverse osmosis treatment and / or electrodialysis treatment to remove it. When salt treatment is performed and the reverse osmosis membrane concentrated water or electrodialysis concentrated water is evaporated to dryness and the salt content is recovered as a solid, the heavy metal removal treatment is performed before or after the desalting treatment. A recovered salt with a very low content can be obtained and reused as a raw material for industrial salts.
In particular, when a reverse osmosis treatment and an electrodialysis treatment are combined, high efficiency can be obtained in both treatments, and salts can be collected effectively.
Since the reverse osmosis treated water is collected by the reverse osmosis treatment, even if an organic component is contained, it is filtered out and hardly leaks into the treated water. Moreover, since the softening treatment is performed, there is no trouble of calcium scale precipitation in the treatment using both membranes. According to this method, organic wastewater containing a high concentration of salts is efficiently desalted and reused. And can be discharged directly into rivers.
[Brief description of the drawings]
FIG. 1 is a schematic view of an organic wastewater treatment apparatus according to the present invention in which a heavy metal removal apparatus is provided in front of a reverse osmosis treatment apparatus.
FIG. 2 is a schematic view of an organic wastewater treatment apparatus according to the present invention in which a heavy metal removal apparatus is provided after an electrodialysis treatment apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Water to be treated inflow pipe 2 Softening treatment device 3 Biological treatment device 4 Coagulation precision membrane filtration device 5 Heavy metal removal device 6 Reverse osmosis treatment device 7 Reverse osmosis treatment permeate drainage pipe 8 Electrodialysis treatment device 9 Electrodialysis desalination treatment water return pipe DESCRIPTION OF SYMBOLS 10 Evaporation drying processing apparatus 11 To-be-processed water inflow pipe 12 Softening processing apparatus 13 Biological processing apparatus 14 Aggregation precision membrane filtration apparatus 15 Reverse osmosis processing apparatus 16 Reverse osmosis processing permeated water drain pipe 17 Electrodialysis processing apparatus 18 Electrodialysis desalination processing water return Tube 19 Heavy metal removal device 20 Evaporation drying processing device

Claims (4)

  1. One or more selected from the group consisting of biological treatment, flocculation treatment, sand filtration treatment, and precision membrane filtration treatment after softening treatment of organic wastewater containing high-concentration salts to lower the calcium concentration therein Treatment or a combination of two or more, followed by desalting with a reverse osmosis membrane and / or an electrodialysis membrane, and evaporating and drying the remaining reverse osmosis membrane concentrated water or electrodialysis membrane concentrated water to form a solid In the method for treating organic wastewater recovered as a product, the salt removal without heavy metal is carried out before or after the desalination treatment with a reverse osmosis membrane and / or an electrodialysis membrane. A method for treating organic wastewater containing high-concentration salts, characterized in that it is recovered as a solid.
  2. The method for treating organic wastewater containing high-concentration salts according to claim 1, wherein an adsorption treatment with a chelate resin is performed as the heavy metal removal treatment.
  3. In a wastewater treatment apparatus that treats organic wastewater containing high-concentration salts and collects salt content that does not contain heavy metals as solids, a softening treatment apparatus 2 connected to a treated water inflow pipe 1 that supplies organic wastewater; Biological treatment device 3 on its discharge side, then agglomeration precision membrane filtration device 4, further heavy metal removal device 5, reverse osmosis treatment device 6 provided with reverse osmosis treatment permeate drainage pipe 7 on its discharge side, and its concentrated water discharge An electrodialysis treatment device 8 provided with an electrodialysis desalination treatment water return pipe 9 to the reverse osmosis treatment device 6 on the side, and an evaporative drying treatment device for converting salt content not containing heavy metals into a solid on the concentrated water discharge side A wastewater treatment apparatus for recovering a salt content.
  4. In a wastewater treatment apparatus that treats organic wastewater containing high-concentration salts and collects salt content that does not contain heavy metals as solids, a softening treatment apparatus 12 connected to a treated water inflow pipe 11 that supplies organic wastewater; A biological treatment device 13 on the discharge side, a coagulation precision membrane filtration device 14, a reverse osmosis treatment device 15 provided with a reverse osmosis treatment permeate drainage pipe 16 on the discharge side, and a reverse osmosis treatment device on the concentrated water discharge side Electrodialysis treatment device 17 provided with electrodialysis desalination treatment water return pipe 18 to 15, heavy metal removal device 19 on the concentrated water discharge side, and evaporation drying treatment device for converting salt content not containing heavy metal into solid matter A wastewater treatment apparatus for recovering a salt content.
JP25326699A 1999-09-07 1999-09-07 Method and apparatus for treating organic wastewater containing high-concentration salts Expired - Fee Related JP3909793B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25326699A JP3909793B2 (en) 1999-09-07 1999-09-07 Method and apparatus for treating organic wastewater containing high-concentration salts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25326699A JP3909793B2 (en) 1999-09-07 1999-09-07 Method and apparatus for treating organic wastewater containing high-concentration salts

Publications (2)

Publication Number Publication Date
JP2001070989A JP2001070989A (en) 2001-03-21
JP3909793B2 true JP3909793B2 (en) 2007-04-25

Family

ID=17248898

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25326699A Expired - Fee Related JP3909793B2 (en) 1999-09-07 1999-09-07 Method and apparatus for treating organic wastewater containing high-concentration salts

Country Status (1)

Country Link
JP (1) JP3909793B2 (en)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100463251B1 (en) * 2002-09-11 2004-12-23 웅진코웨이주식회사 Purified system having electro dialysis
EP1661863B1 (en) * 2004-11-30 2012-03-07 Grünbeck Wasseraufbereitung GmbH Method and device for treating and/or purifying of fluids containing water hardness
JP4834993B2 (en) * 2004-12-27 2011-12-14 栗田工業株式会社 Waste water treatment apparatus and treatment method
WO2007046008A1 (en) * 2005-10-17 2007-04-26 Ockert Tobias Van Niekerk Purification of water
JP2007209919A (en) * 2006-02-10 2007-08-23 Kobelco Eco-Solutions Co Ltd Salt recovery method and salt recovery apparatus
CN102167463B (en) * 2010-02-26 2014-05-14 通用电气公司 Water disposal facility and method
EP2583946B1 (en) * 2010-06-21 2017-07-12 Taiheiyo Cement Corporation Calcium removal method
CN102557324B (en) * 2010-12-07 2013-12-18 光大环保科技发展(北京)有限公司 Method for treating garbage leachate
JP5567468B2 (en) * 2010-12-24 2014-08-06 水ing株式会社 Method and apparatus for treating organic wastewater
CN102351352B (en) * 2011-07-04 2014-05-07 昆明理工大学 Electrodialysis-efficient evaporation method for treating mining and metallurgy waste water membrane filtrating concentrate
JP5712107B2 (en) * 2011-10-27 2015-05-07 株式会社神鋼環境ソリューション Water treatment method and water treatment equipment
CN102502927B (en) * 2011-12-22 2013-06-12 浙江大学 Device and method for desalinizing alkaline water and seawater as well as concentrating and recovering mineral salts
JP5901288B2 (en) 2011-12-28 2016-04-06 三菱重工メカトロシステムズ株式会社 Wastewater treatment equipment
JP5966514B2 (en) * 2012-03-29 2016-08-10 栗田工業株式会社 Method and apparatus for treating thiourea-containing water
CN103342432B (en) * 2013-07-23 2015-10-28 南京工业大学 A kind of near zero release technique of brine waste
CN104341062B (en) * 2013-08-02 2016-07-13 厦门紫金矿冶技术有限公司 A kind of process low concentration salt-containing organic wastewater the method reclaiming its ionic surfactants
CN104418472A (en) * 2013-09-11 2015-03-18 三菱丽阳株式会社 Treatment device and treatment method of wastewater containing organic matters
CN103570175B (en) * 2013-10-25 2015-03-25 浙江博世华环保科技有限公司 Method for processing percolate membrane treatment concentrated solution of waste incineration plant
CN105217751A (en) * 2014-06-19 2016-01-06 胡明成 The multiple precipitator method are removed city refuse landfill and are concentrated liquid calcium, magnesium ion
CN105293805A (en) * 2015-11-11 2016-02-03 光大环保技术研究院(深圳)有限公司 High-salinity high-hardness waste water zero-discharge processing apparatus and method thereof
CN105481178A (en) * 2015-12-28 2016-04-13 嘉园环保有限公司 Landfill leachate treatment process with softening treatment
US10669168B2 (en) * 2016-11-29 2020-06-02 China Petroleum & Chemical Corporation Method and system for treating brine waste water
KR101948185B1 (en) * 2018-10-08 2019-02-14 (주)이앤씨 Treatment of reverse osmosis concentrated water using Electro-Dialysis system and vacuum evaporation drying system

Also Published As

Publication number Publication date
JP2001070989A (en) 2001-03-21

Similar Documents

Publication Publication Date Title
CN105540967B (en) A kind of organic wastewater minimizing, recycling processing method and processing system
CN104445788B (en) High slat-containing wastewater treatment for reuse zero-emission integrated technique
Paraskeva et al. Membrane processing for olive mill wastewater fractionation
US8506817B2 (en) Enhanced high water recovery membrane process
ES2471215T3 (en) Acid wastewater treatment procedure
US6582605B2 (en) Method of treating industrial waste waters
CN103508602B (en) Membrane and evaporation crystallization integrated process with zero discharge of high-salinity industrial wastewater
JP3883445B2 (en) Sewage treatment equipment
AU2013356476B2 (en) Water treatment process
CN100436335C (en) Methods for reducing boron concentration in high salinity liquid
Arora et al. Use of membrane technology for potable water production
EP2024066B1 (en) Method of improving performance of ultrafiltration or microfiltration membrane process in landfill leachate treatment
US8147696B1 (en) High-efficiency water-softening process
US9758394B2 (en) Treatment of contaminated water from gas wells
AU2011336553B2 (en) Method for recovering gas from shale reservoirs and purifying resulting produced water
CN103979729A (en) Desulfurization waste water recycling and zero discharge system and method
Katsou et al. Industrial wastewater pre-treatment for heavy metal reduction by employing a sorbent-assisted ultrafiltration system
JP3009535B2 (en) Method and apparatus for biologically purifying sewage
US8236178B2 (en) Reverse osmosis water recover method
KR20080109860A (en) Hybrid membrane module, system and process for treatment of industrial wastewater
KR20080045166A (en) Water clarifying apparatus and implementing method
US20110180479A1 (en) Zero liquid discharge water treatment system and method
US8101083B2 (en) Pre-treatment reverse osmosis water recovery method for brine retentate metals removal
WO2012142204A2 (en) Method of recovering oil or gas and treating the resulting produced water
KR20180011482A (en) Apparatus, systems, and methods for fluid filtration

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20050819

RD04 Notification of resignation of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7424

Effective date: 20060324

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20070117

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20070122

R150 Certificate of patent or registration of utility model

Ref document number: 3909793

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100202

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110202

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110202

Year of fee payment: 4

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313111

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110202

Year of fee payment: 4

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120202

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120202

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130202

Year of fee payment: 6

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140202

Year of fee payment: 7

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees