KR19990054942A - Recovery method of salt from Kimchi pickled wastewater - Google Patents
Recovery method of salt from Kimchi pickled wastewater Download PDFInfo
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- KR19990054942A KR19990054942A KR1019970074830A KR19970074830A KR19990054942A KR 19990054942 A KR19990054942 A KR 19990054942A KR 1019970074830 A KR1019970074830 A KR 1019970074830A KR 19970074830 A KR19970074830 A KR 19970074830A KR 19990054942 A KR19990054942 A KR 19990054942A
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- Prior art keywords
- electrodialysis
- wastewater
- salt
- kimchi
- pickled
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- 238000000034 method Methods 0.000 title abstract description 46
- 239000002351 wastewater Substances 0.000 title abstract description 18
- 150000003839 salts Chemical class 0.000 title abstract description 16
- 235000021109 kimchi Nutrition 0.000 title abstract description 14
- 238000011084 recovery Methods 0.000 title description 6
- 238000000909 electrodialysis Methods 0.000 abstract description 23
- 238000001471 micro-filtration Methods 0.000 abstract description 19
- 238000004065 wastewater treatment Methods 0.000 abstract description 12
- 239000010802 sludge Substances 0.000 abstract description 10
- 238000001914 filtration Methods 0.000 abstract description 8
- 239000002699 waste material Substances 0.000 abstract description 5
- 239000000706 filtrate Substances 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 238000011112 process operation Methods 0.000 abstract description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract 1
- 229910052698 phosphorus Inorganic materials 0.000 abstract 1
- 239000011574 phosphorus Substances 0.000 abstract 1
- 239000012528 membrane Substances 0.000 description 12
- 239000007787 solid Substances 0.000 description 7
- 238000005554 pickling Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 239000003011 anion exchange membrane Substances 0.000 description 4
- 238000005341 cation exchange Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000012267 brine Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- WRCICOQZCXGSSW-UHFFFAOYSA-M C([Al](O)C)(=O)O Chemical compound C([Al](O)C)(=O)O WRCICOQZCXGSSW-UHFFFAOYSA-M 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000012510 hollow fiber Substances 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 239000003014 ion exchange membrane Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000009287 sand filtration Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
본 발명은 정밀여과(Microfiltration)와 전기투석(Electrodialysis)을 순차적으로 거쳐 김치공장의 절임 폐수에서 염을 회수하여 절임수로 재이용하는 방법에 관한 것이다. 기존의 김치공자 폐수처리시설에서 폐수를 직접 활성 슬러지 공정으로 처리함으로써 폐수처리 공정의 문제점과 유가자원의 낭비를 초래하던 것을 정밀여과와 전기투석을 연결한 공정으로 전환시켜 유가자원의 회수와 환경친화적인 공정운전을 제공하였다.The present invention relates to a method of recovering salt from pickled wastewater in a Kimchi factory through microfiltration and electrodialysis in sequence, and reusing it as pickled water. In the Kimchi Confucius Wastewater Treatment Facility, wastewater is directly treated with activated sludge process, which converts the problems of wastewater treatment process and waste of valuable resources into a process connecting precision filtration and electrodialysis. Phosphorus process operation was provided.
본 발명은 전기투석을 이용한 염의 회수방법에 있어서 1) 정밀여과 장치를 이용하여 김치절임 폐수중의 부유물을 제거하는 정밀여과 공정 및 2) 상기 공정에서 수득된 여과액을 전기투석 장치에 투입하여 염을 회수하는 전기투석 공정으로 이루어진 김장 절임 폐수로부터 염을 회수하는 방법이다.The present invention relates to a method for recovering salts using electrodialysis, which comprises: 1) a fine filtration process for removing suspended matter in kimchi pickled wastewater using a microfiltration device, and 2) adding the filtrate obtained in the process to an electrodialysis device. It is a method of recovering the salt from the pickled waste water made of electrodialysis process to recover the.
Description
본 발명은 정밀여과와 전기투석을 이용하여 김치 절임 폐수로부터 염화나트륨(이하 염이라 함)을 회수하여 절임 공정에 다시 재이용하는 방법에 관한 것이다.The present invention relates to a method for recovering sodium chloride (hereinafter referred to as salt) from kimchi pickled wastewater using microfiltration and electrodialysis and reusing it in the pickling process.
기존의 김치공장 폐수처리 공정에서는 발생한 폐 염적수와 폐 세척수를 미생물에 의한 처리방법인 활성 슬러지 공정을 이용하였다. 이러한 종래의 김치 공장폐수의 처리공정을 좀 더 상세히 설명하면 제 1 도에 나타낸 바와 같이 절임공정과 세척공정을 좀 더 상세히 설명하면 제 1 도에 나타낸 바와 같이 절임공정과 세척공정에서 나온 폐수는 각각 저정된 후 균등조(1)에서 균등화하여 활성슬러지(2)로 처리하였다. 활성슬러지 처리 후 1차 침전(3)을 거치고 황산알루미늄과 유산반토 등의 응집제(4)를 첨가하여 2차 침전(5)을 수행한 후 모래여과(6)와 활성탄여과(7)를 거쳐서 방류하게 된다. 그러나 이러한 기존의 폐수처리 공정에서는 활성슬러지로 유입되는 폐수의 염농도가 매우 높아 활성슬러지내 미생물의 세포파괴와 그로 인한 유기물 제거의 감소, 질산화 효율 감소 등의 부작용의 나타나며 플록의 형성에도 어려움이 생기게 된다. 따라서 기존의 폐수 처리공정만으로는 부유물질이나 유기물의 방류수 기준을 안정적으로 맞추기 어려운 실정이다. 또한 폐수를 처리하여 방류하는 경우 천일염과 공업용수 등의 유가지원을 낭비하게 되며 폐수처리에 추가적인 비용이 요구되므로 전체적인 생산성의 저하를 가져오게 된다.In the existing Kimchi plant wastewater treatment process, the activated sludge process, which is a treatment method using microorganisms, generated waste brine and wastewater. If the conventional kimchi plant wastewater treatment process will be described in more detail, as shown in FIG. 1, the pickling process and the washing process will be described in more detail. As shown in FIG. After storage, the mixture was equalized in an equalization tank (1) and treated with activated sludge (2). After activated sludge treatment, it is subjected to the first precipitation (3), followed by secondary precipitation (5) by addition of flocculant (4) such as aluminum sulfate and alumina lactic acid, and then discharged through sand filtration (6) and activated carbon filtration (7). Done. However, in such a conventional wastewater treatment process, the salt concentration of wastewater flowing into activated sludge is very high, resulting in side effects such as cell destruction of microorganisms in activated sludge, reduction of organic matters, reduction of nitrification efficiency, and difficulty in forming flocs. . Therefore, the existing wastewater treatment process alone is difficult to meet the effluent standard of suspended substances or organic matter reliably. In addition, when wastewater is treated and discharged, waste oil support such as natural salt and industrial water is wasted, and additional costs are required for wastewater treatment, resulting in lower overall productivity.
본 발명자들은 이러한 종래의 폐수처리 공정의 단점을 개선하기 위하여 방류수의 규제치를 맞추기 위한 기존의 발생 후 처리기술(End-of-pipe)을 대치하여 정밀여과(Microfiltration)와 전기투석(Electrodialysis)을 사용하여 폐수로부터 염을 회수함으로써 원료 절감과 오염물질의 발생량을 감소시킬 수 있음을 알아내고 본 발명을 완성하였다.The present inventors have used microfiltration and electrodialysis to replace the existing end-of-pipe to meet the regulation of effluent to improve the disadvantages of the conventional wastewater treatment process. By recovering the salt from the waste water was found to reduce the amount of raw materials and the generation of pollutants and completed the present invention.
따라서 본 발명의 목적은 활성슬러지공정으로 처리하던 기존의 김치공장 폐수처리의 문제점을 줄이고 유가자원의 낭비를 없애기 위하여 기존의 폐수처리 공정을 정밀여과와 전기투석을 연결한 공정으로 전환시켜 유가지원의 회수와 환경친화적인 공정운전을 제공하는데 있다.Therefore, an object of the present invention is to convert the existing wastewater treatment process into a process connecting precision filtration and electrodialysis in order to reduce the problems of the existing Kimchi plant wastewater treatment and eliminate the waste of valuable resources, which was treated by the activated sludge process. To provide recovery and environmentally friendly process operation.
본 발명은 전기투석을 이용한 염의 회수방법에 있어서 1) 정밀여과 장치를 이용하여 김치 절임 폐수중의 부유물을 제거하는 정밀요과 공정 및 2) 상기 공정에서 수득된 여과액을 전기투석 장치에 투입하여 염을 회수하는 전기투석 공정으로 이루어진 김장 절임 폐수로부터 염을 회수하는 방법임을 특징으로 한다.The present invention relates to a method for recovering salts using electrodialysis, which comprises: 1) a fine confinement process for removing suspended matter in kimchi pickled wastewater using a fine filtration device, and 2) adding the filtrate obtained in the above process to an electrodialysis device. Characterized in that the method for recovering the salt from the pickled waste water made of electrodialysis process to recover the.
제 1 도는 활성슬러지공정을 이용하는 종래의 김치공장 폐수처리 공정의 계통도1 is a schematic diagram of a conventional Kimchi plant wastewater treatment process using an activated sludge process.
제 2 도는 본 발명에 따른 정밀여과와 전기투석을 순차적으로 연결하여 염을 회수하는 공정의 계통도2 is a flow diagram of a process for recovering salts by sequentially connecting microfiltration and electrodialysis according to the present invention.
제 3 도는 본 발명에 사용된 정밀여과 장치에 대한 상세도3 is a detailed view of the microfiltration device used in the present invention.
제 4 도는 본 발명에 사용된 전기투석 장치에 대한 상세도4 is a detailed view of the electrodialysis apparatus used in the present invention.
이하 첨부 도면에 의하여 본 발명을 상세히 설명한다. 제 2 도는 본 발명에 따른 단순화된 공정을 나타내고 있다. 김치 제조 과정중 절임 공정과 세척공정에서 배출된 폐수가 합져진 균등조(1)의 폐염수가 부유물질을 제거하기 위하여 정밀여과 장치(8)로 보내어 진다. 정밀여과 공정을 거쳐 부유물질이 제거된 여과액(11)은 바로 전기투석(9 공정에 투입되며 정밀여과 후 남은 농축액(10)은 공정 밖으로 내보내게 된다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. 2 shows a simplified process according to the invention. The waste brine from the equalization tank (1), which combines the wastewater discharged from the pickling process and the washing process during the kimchi manufacturing process, is sent to the microfiltration device (8) to remove suspended matter. The filtrate (11) from which the suspended solids is removed through the microfiltration process is directly introduced into the electrodialysis process (9), and the concentrated solution (10) remaining after the microfiltration is discharged out of the process.
제 3 도는 본 발명에 사용된 정밀여과 장치에 대한 상세도이다. 본 발명에 사용된 정밀여과 장치는 균등조(14), 펌프(15), 정밀여과막(16)과 정밀여과막 용기(17)로 구성되어 있다. 정밀여과막으로는 중공사막이 사용되었다. 여과막 안으로 부유성 고형물들은 여과막을 통과하지 못하고 농축액 흐름(18)을 따라 다시 균등조(14)로 순환되거나 공정 밖으로 처분(10)되고, 용존된 이온성 물질들은 정밀여과막(16)을 통과하여 여과액 흐름(11)을 통하여 제 2 도의 전기투석(9) 공정으로 투입된다.3 is a detailed view of the microfiltration device used in the present invention. The microfiltration device used in the present invention is composed of an equalization tank 14, a pump 15, a microfiltration membrane 16 and a microfiltration vessel 17. The hollow fiber membrane was used as the microfiltration membrane. Suspended solids into the filtration membrane do not pass through the filtration membrane and are circulated back to the equalizer 14 along the concentrate stream 18 or disposed out of the process (10), and the dissolved ionic materials are filtered through the microfiltration membrane 16. Through the liquid flow 11 is introduced into the process of electrodialysis 9 of FIG.
제 4 도는 본 발명에 사용된 전기투석 장치(Electrodialysis)에 대한 상세도이다. 정밀여과막을 투과한 용액(11)은 염을 회수하기 위하여 전기투석 공정으로 투입된다. 전기투석 공정은 양쪽의 전극 사이에 양이온 교환막(19)과 음이온 교환막(20)을 교대로 나열한 막구조를 갖는다. 전기투석 장치에 직류 전원을 공급하면 Na+이온은 음극쪽으로 이동하면서 양이온 교환막을 통과하지만 음이온 교환막은 통과하지 못하고, Cl-이온은 양극쪽으로 이동하면서 음이온 교환막은 통과하지만 양이온 교환막은 통과할 수 없게 되어 용액 속에 있는 이온들을 분리, 농축하게 된다. 전기투석에서 얻은 농축액(12)은 다시 김치 절임공정에 재이용되고, 탈염액(13)은 활성슬러지공정(2)으로 유입되어 유기물의 산화가 진행된다. 한편, 탈염액은 농축수가 재이용됨으로써 활성슬러지공정에 유입되는 폐수량은 초기 유량의 80%정도로 줄일 수 있다. 이하 실시예를 통하여 본 발명을 좀 더 상세히 설명한다.4 is a detailed view of the electrodialysis apparatus used in the present invention. The solution 11 that has passed through the microfiltration membrane is introduced into an electrodialysis process to recover salts. The electrodialysis process has a membrane structure in which cation exchange membranes 19 and anion exchange membranes 20 are alternately arranged between both electrodes. When DC power is supplied to the electrodialysis device, Na + ions move to the cathode and pass through the cation exchange membrane, but the anion exchange membrane does not pass, and Cl − ions move toward the anode and pass through the anion exchange membrane, but the cation exchange membrane cannot pass. Ions in the solution are separated and concentrated. The concentrated solution 12 obtained by electrodialysis is reused again in the kimchi pickling process, and the desalting solution 13 is introduced into the activated sludge process 2 to proceed with oxidation of the organic material. On the other hand, the desalted liquid is reused in the concentrated water, the amount of wastewater flowing into the activated sludge process can be reduced to about 80% of the initial flow rate. Hereinafter, the present invention will be described in more detail with reference to the following examples.
(실시예1)Example 1
김치공장에서 절임과 세척을 거치고 나온 폐수를 제 3 도의 정밀여과 장치를 이용하여 총유기탄소(TOC), 총용존고형물(TDS), 부유성 고형물질(SS), 탁도의 제거율을 측정하였다. 측정결과 TOC, TDS, SS, 탁도 제거율이 각각 5.6, 5.8, 100, 97.5% 이었다. 그 측정결과를 표 1에 제시하였다.Wastewater from the Kimchi plant after pickling and washing was measured using the precision filtration system of FIG. 3 to remove total organic carbon (TOC), total dissolved solids (TDS), suspended solids (SS) and turbidity. The TOC, TDS, SS, and turbidity removal rates were 5.6, 5.8, 100, and 97.5%, respectively. The measurement results are shown in Table 1.
[표 1]. 정밀여과에 대한 TOC, TDS, SS, 탁도의 제거율 측정 결과TABLE 1 Result of measurement of removal rate of TOC, TDS, SS, and turbidity for microfiltration
(실시예2)Example 2
본 발명에 의한 정밀여과 공정과 전기투석 공정을 이용한 염의 회수공정의 가능성 및 경제성을 알아보기 위하여 정밀여과를 통해 얻은 투과수를 전기투석 공정에 투입하여 염의 회수율, 전류효율 및 에너지 소모량을 측정하였다.In order to investigate the possibility and economic feasibility of the salt recovery process using the microfiltration process and the electrodialysis process according to the present invention, the permeated water obtained through the microfiltration was introduced into the electrodialysis process, and the recovery rate of the salt, the current efficiency and the energy consumption were measured.
염회수 공정에 사용된 전기투석 장치의 이온교환막은 양이온 교환막으로 Ncosepta CM-1과 음이온 교환막으로 Neosepta AM-1이 함께 사용되었다. 그 측정 결과를 다음의 표 2에 제시하였다.The ion exchange membrane of the electrodialysis apparatus used in the salt recovery process is a cation exchange membrane, Ncosepta CM-1. Neosepta AM-1 as an anion exchange membrane This was used together. The measurement results are shown in Table 2 below.
[표 2] 전류효율 및 에너지 소모량의 측정 결과[Table 2] Measurement results of current efficiency and energy consumption
본 발명의 김치공장 폐수로부터 염회수 공정에 의하면 종래에 고농도 염폐수를 생물학적으로 처리함으로써 발생했던 폐수처리 공정상의 문제점을 획기적으로 줄임과 동시에 폐수발생량의 감소와 유가지원을 회수할 수 있어 김치생산 공정의 환경친화성을 도모할 수 있다.According to the salt recovery process from the Kimchi plant wastewater of the present invention, it is possible to remarkably reduce the problems in the wastewater treatment process conventionally caused by biologically treating the high concentration of wastewater, and to reduce the amount of wastewater generated and recover the oil price support. Environmental friendliness can be achieved.
Claims (4)
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| Application Number | Priority Date | Filing Date | Title |
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| KR1019970074830A KR19990054942A (en) | 1997-12-27 | 1997-12-27 | Recovery method of salt from Kimchi pickled wastewater |
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| KR1019970074830A KR19990054942A (en) | 1997-12-27 | 1997-12-27 | Recovery method of salt from Kimchi pickled wastewater |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020085345A (en) * | 2001-05-08 | 2002-11-16 | 김순자 | Pickles Food Collecting Process For Environment Fellowship Of The Kimchi Juice |
| KR100377542B1 (en) * | 2000-09-21 | 2003-03-26 | 한국식품개발연구원 | Recycling System and Processes of the Waste Brine and the Waste Water in Kimchi Factory |
| CN116282642A (en) * | 2023-02-02 | 2023-06-23 | 成都添益农业科学研究院(有限合伙) | A kind of processing method of kimchi wastewater |
| KR20230171664A (en) | 2022-06-14 | 2023-12-21 | 의림환경에너텍 주식회사 | Salt water recycling system for kimchi pickling process |
-
1997
- 1997-12-27 KR KR1019970074830A patent/KR19990054942A/en not_active Application Discontinuation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100377542B1 (en) * | 2000-09-21 | 2003-03-26 | 한국식품개발연구원 | Recycling System and Processes of the Waste Brine and the Waste Water in Kimchi Factory |
| KR20020085345A (en) * | 2001-05-08 | 2002-11-16 | 김순자 | Pickles Food Collecting Process For Environment Fellowship Of The Kimchi Juice |
| KR20230171664A (en) | 2022-06-14 | 2023-12-21 | 의림환경에너텍 주식회사 | Salt water recycling system for kimchi pickling process |
| CN116282642A (en) * | 2023-02-02 | 2023-06-23 | 成都添益农业科学研究院(有限合伙) | A kind of processing method of kimchi wastewater |
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