WO2014196151A1 - 排水処理装置 - Google Patents

排水処理装置 Download PDF

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Publication number
WO2014196151A1
WO2014196151A1 PCT/JP2014/002760 JP2014002760W WO2014196151A1 WO 2014196151 A1 WO2014196151 A1 WO 2014196151A1 JP 2014002760 W JP2014002760 W JP 2014002760W WO 2014196151 A1 WO2014196151 A1 WO 2014196151A1
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WO
WIPO (PCT)
Prior art keywords
carrier
waste water
filtration membrane
drainage
filtration
Prior art date
Application number
PCT/JP2014/002760
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
梅沢　浩之
立木　悦二
Original Assignee
パナソニックＩｐマネジメント株式会社
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 パナソニックＩｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Publication of WO2014196151A1 publication Critical patent/WO2014196151A1/ja

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/14—Ultrafiltration; Microfiltration
    • B01D61/18—Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
    • B01D65/08—Prevention of membrane fouling or of concentration polarisation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/08—Aerobic processes using moving contact bodies
    • C02F3/085—Fluidized beds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1236—Particular type of activated sludge installations
    • C02F3/1268—Membrane bioreactor systems
    • C02F3/1273—Submerged membrane bioreactors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2315/00—Details relating to the membrane module operation
    • B01D2315/06—Submerged-type; Immersion type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/18—Use of gases
    • B01D2321/185—Aeration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
    • B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
    • B01D65/04—Membrane cleaning or sterilisation ; Membrane regeneration with movable bodies, e.g. foam balls
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F2003/001—Biological treatment of water, waste water, or sewage using granular carriers or supports for the microorganisms
    • C02F2003/003—Biological treatment of water, waste water, or sewage using granular carriers or supports for the microorganisms using activated carbon or the like
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/20—Activated sludge processes using diffusers
    • C02F3/201—Perforated, resilient plastic diffusers, e.g. membranes, sheets, foils, tubes, hoses
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Definitions

  • the present invention relates to a waste water treatment apparatus for treating organic waste water using activated sludge carried on a carrier.
  • an apparatus of this type comprises an aeration tank for aeration of sewage to perform activated sludge treatment, and a filtration membrane apparatus provided in the aeration tank for solid-liquid separation of the activated sludge mixture in the tank by filtration. And a suction pump connected to the filtration membrane device for sucking the filtrate by the same member to flow out to the outside, and a suction pump provided in a suction path connecting the filtration membrane device and the suction pump And a pressure gauge for measuring suction negative pressure.
  • Patent No. 3142792 JP 2000-197895 A Japanese Patent Laid-Open No. 2002-192184
  • a resin filtration membrane made of a resin material such as polyolefin is adopted as the filtration membrane, and when the rigid one having a large specific gravity is adopted as the carrier, the carrier is a filtration membrane. There is a risk that the filter membrane may be destroyed by contacting with.
  • the resin filter membrane may be broken by the impact of the support as described above. Further, the carrier may be caught between the filtration membranes, or the carrier may be in contact with the wall surface of the treatment tank to be crushed, and the treatment of the carrier in the crushed portion may be complicated.
  • the present invention has been made in view of such problems, and an object of the present invention is to provide a waste water treatment apparatus whose treatment efficiency is improved by using a carrier.
  • the waste water treatment apparatus of the present invention comprises a treatment tank in which waste water containing activated sludge is stored, a hard filtration membrane to be immersed in the waste water, and a gas for generating a gas under the hard filtration membrane inside the waste water.
  • a hard carrier comprising a hard material having a specific gravity larger than that of water is added to the drainage contained in the treatment tank, and the activated sludge is carried on the hard carrier.
  • a small-sized hard material having a specific gravity larger than that of water is employed as a material of a carrier that carries microorganisms contained in activated sludge. Therefore, the carrier is substantially uniformly dispersed in the drainage without the carrier floating on the upper surface of the drainage, and the treatment efficiency of the drainage is improved.
  • the waste water treatment apparatus 10 of the present invention comprises a treatment tank 12 in which waste water 24 is stored, a filtration membrane 16 immersed in the waste water 24, and a diffuser 28 disposed below the treatment tank 12 to generate air 30. And a pump 18 that communicates with the filtration membrane 16 via a pipe to apply suction pressure.
  • pipes connecting the respective elements are indicated by thick solid lines.
  • the function of the waste water treatment apparatus 10 of this embodiment is to reduce the organic substances contained in the waste water 24 with the activated sludge contained in the treatment tank 12 and further to take out the filtered water 26 filtered by the filtration membrane 16 to the outside. There is. Therefore, the filtered water 26 after being treated by the waste water treatment apparatus 10 according to the present embodiment contains less organic matter as compared with the waste water 24 to be introduced, and further contains almost no organic solid matter. It is a state. Furthermore, in the present embodiment, the carrier is added to the waste water stored in the treatment tank 12, whereby the microorganisms contained in the activated sludge 32 are maintained at a high concentration, and the treatment efficiency is high.
  • the waste water 24 to be treated in the present embodiment is one in which organic substances are contained in water at a high concentration, and specifically, general sewage including manure and the like, waste water discharged from a food factory and the like, and the like.
  • the treatment tank 12 is a container made of metal or resin made of stainless steel or the like, and has a role of storing the drainage 24 to be filtered, the filtration membrane 16 and the like. Sludge treatment and filtration treatment of the drainage 24 are performed in the treatment tank 12.
  • the filtration membrane 16 is a flat membrane filtration membrane here, and is immersed in the drainage 24 stored in the processing tank 12.
  • the filtration membrane 16 is in a state in which the filtration surface that substantially performs filtration is entirely immersed in the drainage 24.
  • the internal space of the filtration membrane 16 communicates with the pump 18 via a pipe, and the drainage 18 is filtered by the filtration membrane 16 by the pump 18 applying a predetermined suction pressure to the internal space of the filtration membrane 16 .
  • filtered water which is the filtered waste water 24 is taken out of the processing tank 12.
  • a resin material, ceramic, sintered metal, a metal plate provided with fine filtration holes, or the like is employed as a material of the filtration membrane 16. Although only one filtration membrane 16 is immersed in the drainage 24 in FIG. 1A, in practice, a plurality of filtration membranes 16 separated by a predetermined distance are immersed in the drainage 24.
  • the aeration unit 28 is disposed below the filtration membrane 16 inside the treatment tank 12 and has a role of generating the air 30.
  • the specific shape of the aeration unit 28 is a tube-like shape provided with a hole at the top.
  • the role of the aeration unit 28 is to supply the oxygen to the drainage 24 by generating the air 30 inside the drainage 24 and to flow the carrier added to the drainage 24.
  • a negative pressure is applied from the pump 18 to the filtration membrane 16 so that the pressure measured by the pressure gauge 20 becomes constant, whereby the filtered water 26 in which the drainage 24 is filtered by the filtration membrane 16 is used as a pipe. It is taken out outside via.
  • the suction pressure applied from the pump 18 to the internal space of the filtration membrane 16 is, for example, about 10 kPa.
  • carrier 23 is added to drainage 24 in order to improve the efficiency of biologically treating drainage 24 stored in treatment tank 12 with activated sludge.
  • the carrier 23 is a particle for supporting useful microorganisms contained in the activated sludge 32.
  • the microbes constituting the activated sludge 32 are carried on the surface of the carrier 23, whereby a large amount of activated sludge 32 is retained inside the treatment tank 12 to increase the treatment efficiency.
  • a material having a specific gravity larger than that of water ie, a specific gravity larger than 1 is employed as the carrier 23.
  • an inorganic material having a certain hardness or more is employed as a material of the carrier 23.
  • a soft resin material is employed as the material of the carrier 23
  • the carrier 23 of this embodiment is made of a hard material having high hardness, the carrier 23 is unlikely to be cracked. Further, even if a crack is generated in the carrier 23 and the microorganism enters the crack, the carrier 23 is not expanded by the generated gas, and the floating of the carrier 23 due to the expansion is prevented.
  • a specific material of the carrier 23 it is possible to adopt activated carbon, foam glass, zeolite, silica or the like.
  • the carrier 23 made of a hard material by employing the carrier 23 made of a hard material, the effect of suppressing the blocking of the filtration membrane 16 can be obtained. Specifically, since the filtration membrane 16 employed in the present embodiment has extremely fine filtration holes, there is a risk that fine particles and activated sludge contained in the waste water 24 may clog the filtration holes and the flux obtained may decrease. There is.
  • the air 30 is raised inside the drainage 24 by diffusing the air 30 from the aeration unit 28 below the filtration membrane 16 inside the drainage 24. As a result, a water flow from the lower side to the upper side is generated inside the drainage 24, and the carrier 23 is also moved upward from the lower side along this. Along with this movement, the carrier 23 with high hardness comes into contact with the filtration surface of the filtration membrane 16, and the particles adhering to the filtration surface are separated, and clogging of the filtration holes is suppressed.
  • the size of the carrier 23 is a range in which the inside of the drainage 24 can float even if the specific gravity is larger than that of water.
  • the width of the carrier 23 is preferably 0.1 ⁇ m to 0.5 ⁇ m.
  • the width of the carrier 23 is smaller than this range, the carrier 23 is too small compared to the microorganisms constituting the activated sludge, and the function of supporting the microorganisms is not exhibited.
  • the width of the carrier 23 is larger than this range, the carrier 23 to which the activated sludge 32 adheres may be precipitated near the bottom surface of the processing tank 12 and the processing efficiency of the activated sludge may be reduced.
  • the shape of the carrier 23 is not particularly limited, but a spherical shape, a hexahedron, or a shape approximating these shapes is adopted. A void may or may not be present inside the carrier 23.
  • the filtration membrane 16 is made of a hard material such as ceramic. Therefore, even if the carrier stirred by the above-described aeration treatment contacts the filter surface 16A, the filter surface 16A is not broken by the contact of the carrier 23.
  • FIG. 2 (A) It is sectional drawing which expands and shows the part enclosed with the dotted line circle in FIG. 2 (A) with reference to FIG. 2 (B).
  • a sludge layer 22 composed of a carrier 23 carrying activated sludge may be formed on the surface of the filtration surface 16A.
  • the size of the filter hole 16C provided in the filter surface 16A is smaller than that of the carrier 23. Therefore, there is little possibility that the filter holes 16C may be blocked by the filter holes 16C.
  • a plurality of filtration membranes 16D, 16E, 16F are arranged such that their filtration surfaces face the drainage 24 stored in the processing tank 12.
  • air 30 is generated in the drainage 24 from the air diffusion holes 17A and the like provided in the air diffusion portion 28, but the air diffusion holes 17A are disposed at places suitable for the stirring of the carrier 23.
  • air gaps 17A are provided in the gap between the filtration membrane 16D disposed on the leftmost side on the paper surface and the side wall of the processing tank 12 so that the air 30 intrudes. That is, the aeration holes 17A of the aeration unit 28 are disposed below the gap. As a result, the air 30 rises between the filter membrane 16D and the side wall of the processing tank, whereby the carrier 23 also moves upward with the water flow of the drainage 24 directed upward. Therefore, the effect of stirring the carrier 23 inside the drainage 24 is obtained.
  • air pores 17B and 17C are provided below the gaps between the filtration membranes 16D, 16E and 16F. Further, air-blowing pores 17D are disposed below the gap between the filtration membrane 16F disposed at the right end and the side wall of the processing tank 12.
  • the drainage 24 is introduced into the inside of the processing tank 12 from the outside.
  • the waste water to be purified and treated in the present embodiment is one in which organic matter to be removed such as sewage is contained in water. Sewage itself may be introduced into the treatment tank 12, but sewage from which large solids have been removed by precipitation treatment or the like may be introduced into the treatment tank 12.
  • the treatment tank 12 is provided with a filtration membrane 16 for filtering the sewage, and the filtration membrane 16 is entirely immersed in the drainage 24.
  • the carrier 23 is introduced into the drainage 24 so that the air 30 is generated from the aeration unit 28.
  • the amount of air 30 generated may be similar to that of a conventional membrane separation activated sludge method.
  • the air 30 rises, the drainage 24 and the activated sludge and the carrier 23 contained in the drainage 24 are agitated inside the treatment tank 12.
  • oxygen is supplied to the drainage 24 and the activity of the activated sludge 32 becomes active.
  • the activated sludge 32 is supported on the surface of the carrier 23, the activated sludge is concentrated, and the treatment efficiency is improved.
  • the carrier 23 of this embodiment is composed of fine particles having a specific gravity of greater than 1, the carrier 23 does not rise to the liquid surface of the drainage 24, and the carrier 23 is well stirred together with the flow of the drainage 24. Ru.
  • a hard material such as activated carbon is employed as the material of the carrier 23.
  • a hard ceramic is also employed as the filtration membrane 16, the filtration membrane is brought into contact with the filtration membrane. 16 is prevented from being damaged.
  • a negative pressure is applied to the internal space of the filtration membrane 16 by the pump 18 to take out the filtered water 26 filtered by the filtration membrane 16 out of the system.
  • the negative pressure provided by the pump 18 is controlled by the pressure gauge 20 to be in a predetermined range. Thereafter, the filtered water taken out is discharged to the outside through precipitation treatment, disinfection treatment and the like.
  • waste water treatment apparatus 12 treatment tank 14 pump 16 filtration membrane 16A filtration surface 16B void 16C filtration holes 16D, 16E, 16F filtration membranes 17, 17A, 17B, 17C, 17D air sparging 18 pump 20 pressure gauge 22 sludge layer 23 carrier 24 Waste water 26 Filtered water 28 Aeration unit 30 Air 32 Activated sludge

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Organic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Biological Treatment Of Waste Water (AREA)
PCT/JP2014/002760 2013-06-03 2014-05-26 排水処理装置 WO2014196151A1 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013117285A JP6151578B2 (ja) 2013-06-03 2013-06-03 排水処理装置
JP2013-117285 2013-06-03

Publications (1)

Publication Number Publication Date
WO2014196151A1 true WO2014196151A1 (ja) 2014-12-11

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JP (1) JP6151578B2 (enrdf_load_stackoverflow)
TW (1) TWI526404B (enrdf_load_stackoverflow)
WO (1) WO2014196151A1 (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9333464B1 (en) 2014-10-22 2016-05-10 Koch Membrane Systems, Inc. Membrane module system with bundle enclosures and pulsed aeration and method of operation
USD779631S1 (en) 2015-08-10 2017-02-21 Koch Membrane Systems, Inc. Gasification device

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101969522B1 (ko) * 2017-10-25 2019-04-16 (주)인바이어플랜텍 산업폐수의 중금속 처리 시스템
JP7004043B1 (ja) * 2020-08-21 2022-02-10 株式会社明電舎 セラミック平膜
JP7004042B1 (ja) 2020-08-21 2022-02-10 株式会社明電舎 セラミック平膜

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JPH0924373A (ja) * 1995-07-12 1997-01-28 Kawasaki Steel Corp 有機性物質を含む排水の処理方法および排水処理装置
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JPH0966292A (ja) * 1995-09-01 1997-03-11 Kawasaki Steel Corp 有機性物質を含む排水の処理方法
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JPH05317897A (ja) * 1992-04-08 1993-12-03 Hitachi Plant Eng & Constr Co Ltd 汚泥消化方法
JPH0924373A (ja) * 1995-07-12 1997-01-28 Kawasaki Steel Corp 有機性物質を含む排水の処理方法および排水処理装置
JPH0957292A (ja) * 1995-08-24 1997-03-04 Mitsubishi Rayon Co Ltd 廃水処理装置
JPH0957289A (ja) * 1995-08-30 1997-03-04 Mitsubishi Kakoki Kaisha Ltd 流動床式生物処理装置
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WO2011132497A1 (ja) * 2010-04-19 2011-10-27 株式会社明電舎 膜ユニット及び膜分離装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9333464B1 (en) 2014-10-22 2016-05-10 Koch Membrane Systems, Inc. Membrane module system with bundle enclosures and pulsed aeration and method of operation
US9956530B2 (en) 2014-10-22 2018-05-01 Koch Membrane Systems, Inc. Membrane module system with bundle enclosures and pulsed aeration and method of operation
US10702831B2 (en) 2014-10-22 2020-07-07 Koch Separation Solutions, Inc. Membrane module system with bundle enclosures and pulsed aeration and method of operation
USD779631S1 (en) 2015-08-10 2017-02-21 Koch Membrane Systems, Inc. Gasification device
USD779632S1 (en) 2015-08-10 2017-02-21 Koch Membrane Systems, Inc. Bundle body

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JP2014233686A (ja) 2014-12-15
TWI526404B (zh) 2016-03-21
JP6151578B2 (ja) 2017-06-21
TW201446662A (zh) 2014-12-16

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