KR20030003206A - Coagulation method of sewage and waste water by using magnetite powder - Google Patents
Coagulation method of sewage and waste water by using magnetite powder Download PDFInfo
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- KR20030003206A KR20030003206A KR1020020079398A KR20020079398A KR20030003206A KR 20030003206 A KR20030003206 A KR 20030003206A KR 1020020079398 A KR1020020079398 A KR 1020020079398A KR 20020079398 A KR20020079398 A KR 20020079398A KR 20030003206 A KR20030003206 A KR 20030003206A
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- South Korea
- Prior art keywords
- tank
- sludge
- magnetite
- flocculation
- treatment
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- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 239000002351 wastewater Substances 0.000 title claims abstract description 18
- 239000000843 powder Substances 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000010865 sewage Substances 0.000 title claims abstract description 13
- 238000005345 coagulation Methods 0.000 title claims abstract description 12
- 230000015271 coagulation Effects 0.000 title claims abstract description 12
- 239000010802 sludge Substances 0.000 claims abstract description 28
- 239000007787 solid Substances 0.000 claims abstract description 25
- 238000005189 flocculation Methods 0.000 claims abstract description 18
- 230000016615 flocculation Effects 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 229920000642 polymer Polymers 0.000 claims abstract description 5
- 238000011084 recovery Methods 0.000 claims abstract description 5
- 238000004062 sedimentation Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims 1
- 239000008394 flocculating agent Substances 0.000 abstract description 5
- 238000001556 precipitation Methods 0.000 abstract description 5
- 229940037003 alum Drugs 0.000 abstract description 4
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 abstract description 4
- 239000000701 coagulant Substances 0.000 abstract description 4
- 150000004679 hydroxides Chemical class 0.000 abstract description 3
- LCPUDZUWZDSKMX-UHFFFAOYSA-K azane;hydrogen sulfate;iron(3+);sulfate;dodecahydrate Chemical compound [NH4+].O.O.O.O.O.O.O.O.O.O.O.O.[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O LCPUDZUWZDSKMX-UHFFFAOYSA-K 0.000 abstract description 2
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 abstract description 2
- 229910000358 iron sulfate Inorganic materials 0.000 abstract description 2
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 2
- 238000007599 discharging Methods 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 230000003472 neutralizing effect Effects 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 241000238366 Cephalopoda Species 0.000 description 1
- 208000005156 Dehydration Diseases 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000004523 agglutinating effect Effects 0.000 description 1
- 210000000170 cell membrane Anatomy 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000002503 metabolic effect Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
본 발명은 하 ·폐수에 함유된 부유고형물질(SS ; Suspended solid)의 제거를 배출 슬러지(Sludge) 양을 적게 배출하면서 효율적으로 제거할 수 있는 방법을 제시하는 것이 목적이다.It is an object of the present invention to propose a method for efficiently removing the suspended solids (SS) contained in sewage and waste water while discharging a small amount of discharge sludge.
이를 위하여 본 발명은, 자화(磁化)자철광(磁銑鑛)의 분말을 폐수와 함께 응집반응조(1)에 주입하고 교반하면 자화자철광분말이 응집의 핵(核)이 되어 폐수중 고형물과 응집시킨 후 응집조(2)로 보내어 고분자응집제를 주입하면서 완속 교반을 하여 침전조((5)에서 침전이 용이하도록 플록(Floc)을 형성시킨 후 침전조(5)로 이송하여 자철광분말과 응집된 고형물은 침전조(5) 하부에 침전되고, 청등수는 침전조(5)상부의 웨어(Weir)를 익류(Overflow)하여 처리수조(8)로 보낸 후 처리수이송펌프(9)에 의해서 후처리공정으로 보내며, 침전된 슬러지는 침전슬러지이송펌프(7)에 의해서 자철광회수공정의 슬러지호퍼(Sludge Hopper : 10)로 보내어 자성자철광분말은 상부에 설치된 회전자석롤러(Roller 11)에 부착된 자성자철광분말은 스크래퍼(Scrapper)에 의해서 분리하여 회수자철광이송컨베이어(Conveyor : 12)에 의해서 응집반응조(1)로 반송하여 재사용하며, 자철광이 제거된 슬러지는 슬러지저장조로 보낸다.To this end, the present invention, when the magnetized magnetite powder is injected into the coagulation reaction tank 1 together with the waste water and stirred, the magnetized magnetite powder becomes a nucleus of the coagulation and aggregates with the solids in the waste water. After passing to the flocculation tank (2) and injecting a polymer coagulant to form a floc (Floc) to facilitate the precipitation in the precipitation tank (5), and then transferred to the precipitation tank (5), the solid matter aggregated with the magnetite powder is precipitated tank (5) It is settled in the lower part, the blue water is overflowed the weir (Weir) in the upper part of the settling tank (5) and sent to the treatment water tank (8), and then sent to the after-treatment process by the treatment water transfer pump (9) The precipitated sludge is sent to the sludge hopper (Sludge Hopper: 10) of the magnetite recovery process by the settling sludge transfer pump (7), and the magnetic magnetite powder is attached to the rotating magnet roller (Roller 11) installed at the top of the scraper ( Recover by separating by Iron transfer conveyor (Conveyor: 12) and re-conveyed to the flocculation reaction tank (1) by, a magnetite sludge is removed, is sent to a sludge storage tank.
특이한 사항은 하 ·폐수를 염화철, 황산철, 알럼(Alum), PAC(Poly Aluminium Chloride)과 같은 응집제를 주입하여 응집하는 경우에 비해서 이들 응집제의 수산화로 생성되는 고형물 만큼 슬럿지 배출량이 감소하면서 중화제가 필요없기 때문에 처리비용이 월등히 감소되면서 처리효율은 거의 대등하기 때문에 폐수의 응집처리방법에 널리 보급될 것으로 기대된다.Of particular note is that the sludge discharge is reduced by the amount of solids produced by the hydroxides of these flocculants compared to the flocculation of flocculants such as iron chloride, iron sulfate, alum, and poly aluminum chloride (PAC). Since it is not necessary, the treatment cost is greatly reduced and the treatment efficiency is almost the same, so it is expected to be widely used in the wastewater flocculation method.
Description
본 발명은 하 ·폐수 중에 함유되어있는 부유고형물질(SS ; Suspended solid)을 자화(磁化)된 자철광(磁銑鑛)의 분말을 이용하여 응집하여 침전조에서 침전 제거한 후 자철광분말은 회수공정에서 회수하여 재이용 하므로 발생 슬러지(Sludge)양을 최소로 하면서 운전비용이 저렴한 응집처리방법에 관한 것이다.In the present invention, suspended solids (SS; Suspended solids) contained in sewage and waste water are agglomerated using magnetized magnetite powder and precipitated in a sedimentation tank, and the magnetite powder is recovered in a recovery process. The present invention relates to a flocculation treatment method with low operating cost while minimizing sludge generated by reuse.
하 ·폐수 중에 함유되어 있는 부유고형물질의 일반적인 응집제거 방법은 염화철, 황산철, 알럼(Alum), PAC(Poly Aluminium Chloride)과 같은 응집제와 고분자응집보조제를 주입하여 응집한 다음에 침전조에서 분리제거하는 방법이 보편화되어 있으며, 이때 발생되는 슬러지의 대부분은 이들 응집제의 수산화물이 차지하고 있기 때문에 발생량이 많아 폐기물처리비용이 높으면서 이들 응집제를 중화처리하여 수산화물을 생성시키는데 중화제를 소모하기 때문에 운전비용이 높은 등의 문제점이 있다.In general, the flocculation method of suspended solids contained in sewage and waste water is coagulated by injecting flocculants such as iron chloride, iron sulfate, alum and poly aluminum chloride (PAC) and polymer flocculent aid, and then separating and removing them from the settling tank. Since the process is common, most of the sludge generated is occupied by hydroxides of these flocculants, and the amount of generated sludge is high, resulting in high waste disposal costs and high operating costs since the neutralizer is consumed to neutralize these flocculants to produce hydroxides. There is a problem.
본 발명은 상기와 같은 문제점을 해소하기 위해 슬러지발생량이 적으면서 운전비용이 저렴한 하 ·폐수 중에 함유되어 있는 부유고형물질의 응집제거를 할 수 있는 방법을 제공하는 데 본 발명의 목적이 있는 것이다.The present invention is to provide a method for coagulation removal of suspended solids contained in sewage and wastewater with low sludge generation amount and low operating cost in order to solve the above problems.
이와 같은 목적을 달성하기 위한 본 발명은, 자화자철광분말을 응집의 핵(核)으로 이용하여 하 ·폐수 중에 함유되어 있는 부유고형물질을 응집처리하여 침전조에서 침전분리한 다음에 자철광회수공정에서 자철광을 회수하여 재사용하므로 슬러지 발생량을 최소화하면서 중화제 등이 필요 없기 때문에 운전비용이 저렴한 응집처리방법을 제시한다.In order to achieve the above object, the present invention utilizes magnetite magnetite powder as a nucleus for flocculation to flocculate suspended solids contained in sewage and wastewater, and then precipitates and separates them in a sedimentation tank. Because it recovers and reuses it, it proposes a flocculation treatment method with low operating cost because it does not need neutralizer while minimizing sludge generation.
도 1은 자철광 분말을 이용한 폐수의 응집처리공정도1 is a coagulation treatment process chart of wastewater using magnetite powder
[도면의 주요부분에 대한 부호의 설명][Explanation of symbols on the main parts of the drawings]
1 : 응집반응조 2 : 응집반응조교반기1: coagulation reaction tank 2: coagulation reaction tank stirrer
3 : 응집조 4 : 응집조교반기3: flocculation tank 4: flocculation tank stirrer
5 : 침전조 6 : 침전조래이크(Rake)5: settling tank 6: settling tank (Rake)
6 : 침전슬러지(Sludge)이송펌프(Pump) 8 : 처리수조6: Sludge Transfer Pump (Pump) 8: Treatment Tank
9 : 처리수이송펌프 10 : 슬러지호퍼(Hopper)9: Treated water transfer pump 10: Sludge hopper (Hopper)
11 : 자석로러(Roller) 12 : 회수자철광 이송컨베이어(Conveyor)11: Magnet Roller 12: Recovered Magnetite Conveyor
본 발명에서 사용하는 자성을 띈 자철광이 물(유체)과 접촉을 하면 자기유체역학(MHD ; Magneto-Hydro-Dynamics)전압이 발생하면서 자철광 표면은 전하(電荷)를 띄면서 수중의 부유고형물질을 전기적인 인력에 의해서 포집되면서 응집의 핵(核) 역할을 하게되며, 또한 물이 자성을 띈 자철광의 자계(磁界)를 통과하면서 전자의 파동(波動)에 의해서 물분자의 집단채(集團休 ; Cluster)가 미세화(微細化)되면서 표면장력(法面張力)이 적어져 침투력(浸透力)이 향상되어 용해력이 향상되면서 탈취효율도 향상되고, 후단의 생물학적 처리공정에서 미생물의 세포막 투과율이 향상되어 미생물의 대사활동을 활발하게 하는 등의 효과가 있다.When the magnetized magnetite used in the present invention comes into contact with water (fluid), magneto-hydro-dynamics (MHD) voltage is generated, and the magnetite surface exhibits a charge while the floating solid material in the water. Collected by electric attraction, it acts as a nucleus of agglomeration, and water passes through a magnetic field of magnetite magnetite, and as a result of waves of electrons, a group of water molecules is collected. As the microstructure becomes smaller, the surface tension decreases, the penetration force improves, solubility improves, deodorization efficiency improves, and cell membrane permeability of microorganisms improves in the later biological treatment process. It is effective in activating the metabolic activity of microorganisms.
이하 도면을 중심으로 본 발명의 내용을 상세히 설명하면 다음과 같다.Hereinafter, the contents of the present invention will be described in detail with reference to the drawings.
하 ·폐수가 응집반응조(1)에 유입되면 가능한 자속밀도(磁束密度)가 200G(Gauss) 이상 자화(磁化)된 자철광을 40∼60㎛정도로 분쇄한 분말을 주입하여 반응조교반기(2)로 교반하면 자성을 띈 자철광의 표면에 부유고형물질이 포집되어 응집핵의 역할을 하면서 응집이 일러나게 되며, 부유고형물질이 응집된 하 ·폐수는 응집조(3)로 보내어 응집보조제로 고분자응집제를 2∼3mg/ℓ정도 주입하면서 응집조교반기(4)로 완속교반을 하면서 침전조(5)에서 침전이 용이하게 플럭(Floc)을 형성시킨 다음에 침전조(5)로 보낸다.When the sewage and wastewater flow into the flocculation tank 1, a powder obtained by pulverizing magnetite magnetized with a magnetic flux density of 200 G (Gauss) or higher to about 40 to 60 µm is injected and stirred by the reaction tank stirrer (2). In this case, suspended solids are trapped on the surface of magnetized magnetite, which acts as agglutinating nucleus, causing coagulation. The sewage and wastewater in which suspended solids are aggregated is sent to the coagulation tank (3). While slowly stirring with a flocculation tank stirrer 4 while injecting about 3 mg / L, precipitates are easily formed in the precipitation tank 5 and then sent to the precipitation tank 5.
침전조(5)에서는 응집된 부유고형물은 침전조 하부에 침전되고, 부유고형물이 제거된 청등수는 침전조(5) 상부의 웨어(Weir)를 익류(Overflow)하여 처리수조(8)로 보낸 다음에 처리수이송펌프(9)에 의해서 후처리공정으로 보내며, 침전된 슬러지는 침전슬러지이송펌프(7)에 의해서 자철광회수공정의 슬러지호퍼(Sludge Hopper : 10)로 보내어 자성자철광분말은 상부에 설치된 회전자석롤러(Roller 11)에 부착되면 스크래퍼(Scrapper)에 의해서 분리회수하여 회수자철광 이송컨베이어(Conveyor : 12)에 의해서 응집반응조(1)로 반송하여 재사용하며, 자철광이 제거된 슬러지는 슬러지저장조로 이송하여 탈수처리 등 후처리공정으로 보낸다.In the settling tank (5), the flocculated suspended solids are settled in the lower part of the settling tank, and the blue solid water from which the suspended solids are removed is overflowed to the weir (top) of the settling tank (5), and then treated. It is sent to the post-treatment process by the water feed pump (9), and the precipitated sludge is sent to the sludge hopper (Sludge Hopper: 10) of the magnetite recovery process by the sedimentation sludge transfer pump (7), and the magnetic magnetite powder is a rotating magnet installed on the upper part. Once attached to the roller 11, it is separated and recovered by a scraper and returned to the coagulation reaction tank 1 by a recovering magnetite conveying conveyor (Conveyor 12) for reuse, and the sludge from which the magnetite is removed is transferred to the sludge storage tank. Send to post-treatment process such as dehydration treatment.
[실시 예1]Example 1
오징어가공공장에서 배출되는 폐수 150∼200㎥/일을 자속밀도가 220G(Gauss)로 착자된 자철광을 50㎛로 분쇄한 분말을 800mg/ℓ정도 주입하여 응집한 후에 고분자응집제를 3mg/ℓ을 주입하여 침전한 다음의 상등수의 수질과 알럼(Alum)을 500mg/ℓ을 주입교반한 후에 가성소다(NaOH)로 pH를 7로 중화처리를 한 다음에 고분자응집제를 3mg/ℓ을 주입하여 침전한 다음의 상등수의 수질은 표 1의 내용과 같다.150 ~ 200㎥ / day of wastewater discharged from squid processing plant is injected with 800mg / ℓ of powder pulverized magnetite with magnetic flux density of 220G (Gauss) to 50㎛, and then 3mg / ℓ of polymer coagulant is injected. After stirring, the water of supernatant and 500mg / ℓ of Alum were stirred and neutralized, followed by neutralization treatment with caustic soda (NaOH) to 7, followed by 3mg / ℓ of polymer coagulant to precipitate. The water quality of the superior water is shown in Table 1.
이상에서 전술한 바와 같이 본 발명에서는 하 ·폐수에 함유된 부유고형물질을 자성을 띈 자철광분말에 의해서 응집한 결과 알럼과 같은 응집제를 주입한 후에 중화제로 중화하여 응집침전한 경우와 비교 할때 응집처리효율이 거의 대등하면서 자성자철광은 회수하여 재사용 하므로서 슬러지 발생량은 월등히 적으면서 중화제가 필요 없기 때문에 운전비용이 저렴하므로 앞으로 하 ·폐수의 응집처리에 널리 보급될 것으로 전망된다As described above, in the present invention, as a result of agglomeration of the suspended solids contained in the sewage and waste water by magnetizing magnetite powder, the coagulant is neutralized with a neutralizing agent after injecting a flocculant such as alum and then flocculated and precipitated. As the treatment efficiency is almost equal, the magnetic magnetite is recovered and reused, and the sludge generation amount is very small and the neutralizing agent is not required. Therefore, the operation cost is low, and it is expected to be widely used in the condensation treatment of sewage and wastewater.
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| JP2596593Y2 (en) * | 1993-02-09 | 1999-06-14 | エイテック株式会社 | Magnetized water sludge removal equipment |
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| US8869987B2 (en) | 2006-11-30 | 2014-10-28 | Palo Alto Research Center Incorporated | Serpentine structures for continuous flow particle separations |
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| US9433880B2 (en) | 2006-11-30 | 2016-09-06 | Palo Alto Research Center Incorporated | Particle separation and concentration system |
| US9486812B2 (en) | 2006-11-30 | 2016-11-08 | Palo Alto Research Center Incorporated | Fluidic structures for membraneless particle separation |
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| US10052571B2 (en) | 2007-11-07 | 2018-08-21 | Palo Alto Research Center Incorporated | Fluidic device and method for separation of neutrally buoyant particles |
| CN105776476A (en) * | 2016-04-25 | 2016-07-20 | 广饶康达环保水务有限公司 | Magnetic-coagulation water treatment device and treatment process |
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