KR200390915Y1 - Water soluble cutting oils disinfection apparatus - Google Patents

Water soluble cutting oils disinfection apparatus Download PDF

Info

Publication number
KR200390915Y1
KR200390915Y1 KR20-2005-0011605U KR20050011605U KR200390915Y1 KR 200390915 Y1 KR200390915 Y1 KR 200390915Y1 KR 20050011605 U KR20050011605 U KR 20050011605U KR 200390915 Y1 KR200390915 Y1 KR 200390915Y1
Authority
KR
South Korea
Prior art keywords
water
soluble cutting
sterilization
cutting oil
tank
Prior art date
Application number
KR20-2005-0011605U
Other languages
Korean (ko)
Inventor
임동일
Original Assignee
(주)로터스엔지니어링
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 (주)로터스엔지니어링 filed Critical (주)로터스엔지니어링
Priority to KR20-2005-0011605U priority Critical patent/KR200390915Y1/en
Application granted granted Critical
Publication of KR200390915Y1 publication Critical patent/KR200390915Y1/en

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/02Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
    • A61L2/08Radiation
    • A61L2/10Ultraviolet radiation
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/02Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
    • A61L2/025Ultrasonics
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2202/00Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
    • A61L2202/10Apparatus features
    • A61L2202/11Apparatus for generating biocidal substances, e.g. vaporisers, UV lamps
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/70Soluble oils

Landscapes

  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Physical Water Treatments (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)

Abstract

본 고안은 물리적 처리방법(초음파 및 자외선)을 이용하여 수용성 절삭유의 부패를 방지함으로써, 수용성 절삭유의 교체 주기를 연장하여 비용을 절감하고 환경오염이 최소화 되도록 한 수용성 절삭유 살균장치에 관한 것이다.The present invention relates to a water-soluble cutting oil sterilization apparatus to prevent the corruption of the water-soluble cutting oil by using a physical treatment method (ultrasound and ultraviolet rays), to extend the replacement cycle of the water-soluble cutting oil to reduce the cost and minimize environmental pollution.

본 고안은 수용성 절삭유 탱크와 연결되는 유수분리조가 구비되고, 유수분리조로부터의 수용성 절삭유를 자외선램프로 1차 살균처리 하는 자외선살균조가 구비되며, 자외선살균조로부터의 수용성 절삭유를 초음파진동자의 초음파 충격파로 살균처리 하는 초음파살균조가 구비되도록 구성되어 있다.The present invention is provided with an oil-water separation tank connected to the water-soluble cutting oil tank, and an ultraviolet sterilization tank for firstly sterilizing the water-soluble cutting oil from the oil-water separation tank with an ultraviolet lamp, and converts the water-soluble cutting oil from the ultraviolet sterilization tank into the ultrasonic shock wave of the ultrasonic vibrator. It is configured to be equipped with an ultrasonic sterilization tank for sterilization.

Description

수용성 절삭유 부폐방지 살균장치{Water soluble cutting oils disinfection apparatus}Water soluble cutting oils disinfection apparatus

본 고안은 수용성 절삭유 살균장치에 관한 것으로서, 더욱 상세하게는 수용성 절삭유를 물리적 처리방법으로 살균처리 함으로써 부패방지 및 수용성 절삭유의 사용 수명을 연장하여 친환경적이고 경제적인 수용성 절삭유 부폐방지 살균장치에 관한 것이다.The present invention relates to a water-soluble cutting oil sterilization apparatus, and more particularly, to an anti-corrosion and anti-corrosion water-soluble cutting oil antiseptic device by extending the service life of the anti-corruption and water-soluble cutting oil by sterilizing the water-soluble cutting oil by a physical treatment method.

일반적으로 금속의 절삭 가공시 사용되는 수용성 절삭유는 절삭유제를 물로 희석하여 3 ~ 8% 용액으로 사용하고 있다. 이러한 수용성 절삭유는 일반적으로 3 ~ 6개월 주기로 교환하고 있으며 이때 난분해성 폐수인 폐 수용성 절삭유(COD : 80,000mg/l이상, n-H추출물질 : 2,000g/l이상)가 다량으로 배출되어 환경오염을 발생시켰다.In general, the water-soluble cutting oil used in the cutting of metal is used as a 3 ~ 8% solution by diluting the cutting oil with water. These water soluble cutting oils are generally exchanged every 3 to 6 months. At this time, waste water soluble cutting oil (COD: 80,000mg / l or more, nH extract material: 2,000g / l or more) is discharged in large quantities, resulting in environmental pollution. I was.

절삭유의 절삭기능 향상을 위해 첨가하는 유성제, 극압 첨가제와 기유 등은 미생물 번식 환경을 만드는 영양원이 되고 미생물에 의한 부패는 수용성 절삭유의 절삭기능 저하는 물론 심한 악취 발생으로 작업환경 악화를 초래하여 수용성 절삭유의 교환의 직접적인 원인을 제공하고, 수용성 절삭유는 폐 수용성 절삭유 교환에 따른 원자재 구입비용이 증가되어 대형 사업장의 경우 년간 수십억원의 비용이 소요되고 있는 실정이다.Oil additives, extreme pressure additives, and base oils added to improve the cutting function of cutting oils become nutrients to create a microbial propagation environment, and decay by microorganisms causes deterioration of the working environment due to deterioration of cutting function of cutting oils and severe odors. It provides a direct cause of cutting oil exchange, and water-soluble cutting oil is costing billions of years in large business sites due to an increase in raw material purchase cost due to waste water-soluble cutting oil exchange.

본 고안은 종래의 문제점을 감안하여 개발한 것으로서, 본 고안의 목적은 물리적 처리방법(초음파 및 자외선)을 이용하여 수용성 절삭유의 부패를 방지함으로써, 수용성 절삭유의 교체 주기를 연장하여 비용을 절감하고 환경오염이 최소화 되도록 한 수용성 절삭유 부폐방지 살균장치를 제공함에 있다.The present invention was developed in view of the conventional problems, and an object of the present invention is to prevent the corruption of the water-soluble coolant using physical treatment methods (ultrasound and ultraviolet rays), thereby extending the replacement cycle of the water-soluble coolant to reduce costs and the environment. To provide a water-soluble cutting oil anti-sterilization sterilization apparatus to minimize contamination.

상기 목적을 달성하기 위하여 본 고안은 수용성 절삭유 탱크와 연결되는 유수분리조가 구비되고, 유수분리조로부터의 수용성 절삭유를 자외선램프로 1차 살균처리 하는 자외선살균조가 구비되며, 자외선살균조로부터의 수용성 절삭유를 초음파진동자의 초음파 충격파로 살균처리 하는 초음파살균조가 구비되도록 구성되어 있다.In order to achieve the above object, the present invention is provided with an oil-water separation tank connected to a water-soluble cutting oil tank, and is provided with an ultraviolet sterilization tank for primary sterilization of the water-soluble cutting oil from the oil-water separation tank with an ultraviolet lamp, and a water-soluble cutting oil from the ultraviolet sterilization tank. Ultrasonic sterilizer for sterilization by ultrasonic shock wave of ultrasonic vibrator is configured to be provided.

이하 본 고안의 바람직한 실시예를 첨부 도면에 따라 상세히 설명하면 다음과 같다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 고안 살균장치의 사시도 이고, 도 2는 본 고안 살균장치의 정단면도 이다. 1 is a perspective view of the present invention sterilizer, Figure 2 is a front sectional view of the present invention sterilizer.

본 고안 살균장치는 공작기계와 연결된 수용성 절삭유 탱크와 호스로 연결되는 필터(1)가 구비되고 필터(1)와 연이어서 유수분리조(2)가 구비된다. 필터에서는 절삭 가공중 발생되는 칩이나 이물질을 걸러주는 것이며, 유수분리조(2)에서는 유수분리 기능과 유량조절 기능을 갖는다. 필터와 유수분리조의 사이에는 통상의 유량밸브가 설치되는데 이는 처리속도를 조절하기 위한 것이다.The present invention sterilization apparatus is provided with a filter (1) connected to the water-soluble cutting oil tank and a hose connected to the machine tool, and is connected to the filter (1) is provided with an oil and water separation tank (2). The filter filters out chips or foreign substances generated during cutting, and the oil / oil separator has an oil-water separation function and a flow control function. A normal flow valve is installed between the filter and the oil / water separation tank to adjust the processing speed.

유수분리조(2)와 연이어서 자외선살균조(3)가 구비된다. 그리고 자외선살균조(3)와 호스(5)로 연결되는 초음파살균조(6)가 구비된다. 자외선살균조(3) 내부에는 자외선램프(4)가 다수개 구비되며 초음파살균조(6) 외벽에는 다수개의 초음파진동자(7)가 구비된다. 초음파살균조(6)를 거친 수용성 절삭유는 다시 수용성 절삭유 탱크로 보내진다.In succession with the oil / water separation tank 2, an ultraviolet sterilization tank 3 is provided. And the ultrasonic sterilization tank 3 and the ultrasonic sterilization tank (6) connected to the hose 5 is provided. A plurality of ultraviolet lamps 4 are provided in the ultraviolet sterilization tank 3, and a plurality of ultrasonic vibrators 7 are provided on the outer wall of the ultrasonic sterilization tank 6. The water soluble cutting oil passed through the ultrasonic sterilization tank 6 is sent to the water soluble cutting oil tank again.

초음파살균조(6)는 최소 공간으로 최대 출력을 얻을 수 있도록 다각형으로 구성되며 각 면에 다수개의 초음파진동자(7)가 장착된다.The ultrasonic sterilization tank 6 is composed of polygons so as to obtain the maximum output with the minimum space, and a plurality of ultrasonic vibrators 7 are mounted on each surface.

이처럼 구성된 본 고안의 살균원리는 다음과 같다.The sterilization principle of the present invention configured as described above is as follows.

초음파살균조(6) 내부에서 강한 초음파가 발생되면 수용성 절삭유는 부압이 걸리는 지점에서 케비테이션 버블(cavitation bubble)이 형성되며 그 내부는 진공으로 붕괴시 약 5000℃, 1000기압의 초고온,고압의 특수한 초임계 반응장이 발생되므로 이러한 조건에서 절삭유는 강한 충격파와 변형력으로 살균처리된다.When a strong ultrasonic wave is generated inside the ultrasonic sterilization tank 6, a cavitation bubble is formed at the point where the negative pressure is applied to the water-soluble cutting oil, and the inside is a special ultra high temperature and high pressure of about 5000 ° C. Under these conditions, coolant is sterilized with strong shock waves and strain forces as critical reaction fields are generated.

그리고 잘 알려진 바와 같이 자외선살균조(3) 내부의 자외선램프(4)는 소독용으로 사용되므로 수용성 절삭유를 1차적으로 살균처리하는 역할을 한다.And as is well known, the ultraviolet lamp 4 inside the ultraviolet sterilization tank (3) is used for disinfection and serves to primarily sterilize the water-soluble cutting oil.

도 4 내지 도 6은 본 고안 살균장치의 초음파진동자(7)와 자외선램프(4)의 세기를 조절하였을 때의 반응시간을 그래프로 나타낸 것이다. 초음파나 자외선의 파워가 높을수록 미생물의 살균시간은 단축되나, 수용성 절삭유의 성상 변화와 현장적용 시 경제성을 고려하여 최적의 살균조건을 도출하였다.4 to 6 is a graph showing the reaction time when the intensity of the ultrasonic vibrator 7 and the ultraviolet lamp 4 of the present invention sterilization device. The higher the power of ultrasonic or ultraviolet light, the shorter the sterilization time of microorganisms, but the optimal sterilization conditions were derived by considering the change in water soluble cutting oil properties and economic feasibility in the field application.

도 4의 그래프에서 보듯이 초음파 28kHz와 자외선 160W의 조합은 반응시간 50분에 미생물 제거효율이 나타났다. 반면에 초음파 40kHz와 자외선 160W의 조합은 반응시간 40분에 제거효율이 나타났다. As shown in the graph of FIG. 4, the combination of ultrasonic 28 kHz and ultraviolet 160 W showed microbial removal efficiency at a reaction time of 50 minutes. On the other hand, the combination of ultrasonic 40kHz and ultraviolet 160W showed removal efficiency at 40 minutes.

도 5의 그래프에서 보듯이 초음파 40kHz와 자외선 256W의 조합은 반응시간 20분에 살균반응이 일어났으며 초음파의 세기를 100, 150 및 200W가 비슷하게 20분에서 30분 사이에 살균반응을 나타냈다. 즉 105cells/㎖ 미생물 개체수는 초음파 40kHz와 자외선 256W 조합에서 20분에 90%(104cells/㎖), 40분에 99%(103cells/㎖)로 살균되며 이때의 처리속도는 2ℓ/min이다.As shown in the graph of Fig. 5, the combination of ultrasonic 40kHz and ultraviolet 256W generated a sterilization reaction at 20 minutes of reaction time, and the intensity of ultrasonic waves 100, 150, and 200W showed sterilization reaction similarly between 20 and 30 minutes. That is, 10 5 cells / mL microbial population is sterilized at 90% (10 4 cells / mL) in 20 minutes and 99% (10 3 cells / mL) in 40 minutes using a combination of 40kHz ultrasound and 256W ultraviolet. / min.

이상에서와 같이 본 고안에 따르면 초음파 40kHz-150W와 자외선 256W 조합에서 살균효율이 90 ~ 99%(104cells/㎖ → 103cells/㎖)에 도달하는 시간이 20 ~ 30분으로 경제성을 고려한 물리적 처리에 의한 박테리아의 살균효율에 최적 조건임을 알 수 있다.As described above, according to the present invention, the time for reaching the sterilization efficiency of 90 to 99% (10 4 cells / ml → 10 3 cells / ml) in the combination of ultrasonic 40kHz-150W and ultraviolet 256W is considered to be economical with 20-30 minutes. It can be seen that the optimum conditions for the sterilization efficiency of bacteria by physical treatment.

따라서 수용성 절삭유를 주기적으로 교체하지 않더라도 공작기계의 절삭력에 무리가 없고 악취가 발생되지 않으므로 교체비용을 절감할 수 있으며, 절삭유를 폐기하는데 따르는 환경오염을 크게 줄일 수 있는 등의 효과가 있다.Therefore, even if the water-based coolant is not periodically replaced, cutting force of the machine tool is not unreasonable and no bad smell is generated, thereby reducing the replacement cost and greatly reducing the environmental pollution caused by cutting the coolant.

도 1은 본 고안 살균장치의 사시도1 is a perspective view of the present invention sterilizer

도 2는 본 고안 살균장치의 정단면도2 is a front sectional view of the present invention sterilization apparatus

도 3은 본 고안 살균장치의 평단면도3 is a plan sectional view of the present invention sterilizer

도 4 내지 도 6은 본 고안 살균장치의 살균력 비교를 나타낸 그래프4 to 6 is a graph showing the comparison of the sterilization power of the present invention sterilization device

<도면의 주요부분에 대한 부호설명><Code Description of Main Parts of Drawing>

1 : 필터 2 : 유수분리조1: filter 2: oil / water separator

3 : 자외선살균조 4 : 자외선램프3: UV sterilization tank 4: UV lamp

5 : 호스 6 : 초음파살균조5: hose 6: ultrasonic sterilization tank

7 : 초음파진동자7: ultrasonic vibrator

Claims (2)

수용성 절삭유 탱크와 연결되는 유수분리조(2)가 구비되고,Oil-water separation tank 2 is connected to the water-soluble cutting oil tank, 유수분리조(2)로부터의 수용성 절삭유를 자외선램프(4)로 1차 살균처리 하는 자외선살균조(3)가 구비되며,An ultraviolet sterilization tank 3 is provided to firstly sterilize the water-soluble cutting oil from the oil / water separation tank 2 with the ultraviolet lamp 4, 자외선살균조(3)로부터의 수용성 절삭유를 초음파진동자(7)의 초음파 충격파로 살균처리 하는 초음파살균조(6)가 구비됨을 특징으로 하는 수용성 절삭유 부폐방지 살균장치.An ultrasonic sterilization tank (6) for sterilizing the water-soluble cutting oil from the ultraviolet sterilization tank (3) by the ultrasonic shock wave of the ultrasonic vibrator (7) is provided. 제 1 항에 있어서,The method of claim 1, 초음파진동자(7)는 40kHz-150W로 구성하고, 자외선램프(4)는 256W로 구성하여 20 ~ 30분 동안 살균효율이 90 ~ 99%(104cells/㎖ → 103cells/㎖)가 되도록 함을 특징으로 하는 수용성 절삭유 부폐방지 살균장치.Ultrasonic vibrator (7) consists of 40kHz-150W, UV lamp (4) consists of 256W so that sterilization efficiency is 90 ~ 99% (10 4 cells / ml → 10 3 cells / ml) for 20-30 minutes. Water-soluble cutting oil anti-sterilization sterilization apparatus characterized in that.
KR20-2005-0011605U 2005-04-26 2005-04-26 Water soluble cutting oils disinfection apparatus KR200390915Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR20-2005-0011605U KR200390915Y1 (en) 2005-04-26 2005-04-26 Water soluble cutting oils disinfection apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR20-2005-0011605U KR200390915Y1 (en) 2005-04-26 2005-04-26 Water soluble cutting oils disinfection apparatus

Publications (1)

Publication Number Publication Date
KR200390915Y1 true KR200390915Y1 (en) 2005-07-28

Family

ID=43692152

Family Applications (1)

Application Number Title Priority Date Filing Date
KR20-2005-0011605U KR200390915Y1 (en) 2005-04-26 2005-04-26 Water soluble cutting oils disinfection apparatus

Country Status (1)

Country Link
KR (1) KR200390915Y1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100877671B1 (en) * 2007-08-31 2009-01-08 경북대학교 산학협력단 A device for recycling cutting oil using ultraviolet(uv) rays
KR101058083B1 (en) 2011-04-22 2011-08-24 황병화 Disinfecting device with ultrasonic wave vibrator
KR101058085B1 (en) * 2008-10-22 2011-08-24 황병화 Sterilizer with Ultrasonic Generator
KR101131486B1 (en) * 2011-04-22 2012-03-30 황병화 Disinfecting device with ultrasonic wave vibrator
KR101153725B1 (en) 2010-04-12 2012-06-14 한국기계연구원 Sterilization apparatus using ultrasonics sterilization apparatus using ultrasonics
KR101229797B1 (en) 2010-06-08 2013-02-05 황병화 Water supply tap with function of water purification and cavitation discharge
KR102676925B1 (en) 2023-10-24 2024-06-20 아륭기공(주) Coolant sterilizer using plasma

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100877671B1 (en) * 2007-08-31 2009-01-08 경북대학교 산학협력단 A device for recycling cutting oil using ultraviolet(uv) rays
KR101058085B1 (en) * 2008-10-22 2011-08-24 황병화 Sterilizer with Ultrasonic Generator
KR101153725B1 (en) 2010-04-12 2012-06-14 한국기계연구원 Sterilization apparatus using ultrasonics sterilization apparatus using ultrasonics
KR101229797B1 (en) 2010-06-08 2013-02-05 황병화 Water supply tap with function of water purification and cavitation discharge
KR101058083B1 (en) 2011-04-22 2011-08-24 황병화 Disinfecting device with ultrasonic wave vibrator
KR101131486B1 (en) * 2011-04-22 2012-03-30 황병화 Disinfecting device with ultrasonic wave vibrator
KR102676925B1 (en) 2023-10-24 2024-06-20 아륭기공(주) Coolant sterilizer using plasma

Similar Documents

Publication Publication Date Title
KR200390915Y1 (en) Water soluble cutting oils disinfection apparatus
CN102765785A (en) Device and method for sterilizing and disinfecting wastewater by pulsed liquid-phase discharge plasma
CN101774737B (en) Method and device for treating and recycling tobacco wastewater with double-membrane process
CN202265477U (en) Oil filed sewage sterilization device using electrochemical oxidization, ultraviolet rays and ultrasonic technology
CN201148361Y (en) Highly effective nano-sterilizing apparatus
CN102372386A (en) Method for sterilizing oil field sewage by cooperating electrochemical oxidation with ultraviolet and ultrasonic technology
RU2183197C1 (en) Water treatment apparatus
CN202297284U (en) Automatic control device for clean water treatment
CN209307099U (en) A kind of Medical Wastewater Disposal System
KR100883123B1 (en) High efficiency chamber type uv sterilizer using non-motorized vortex generator
KR102449427B1 (en) Running water disinfection device for irradiating 3d shape with uv light on flowing water pipe
CN206858373U (en) A kind of integrated sewage treating apparatus
CN1552633A (en) Running water ultraviolet technology pretreatment method
Whitby et al. The history of UV and wastewater
CN204939160U (en) Marine plankton inactivating device
CN203820502U (en) Multinomial catalytic oxidation ultraviolet treatment device for oily sewage of oil field
CN112851040A (en) Integrated sewage treatment device
CN1686851A (en) Method for treating sewage containing crude oil
CN111320296A (en) Low-cost emulsion purifies regeneration system
CN2670342Y (en) Self-generating ultraviolet wastewater flow treater
CN105152430A (en) Marine plankton inactivation device
CN208632340U (en) A kind of sewage microbiological oxidation device
CN111099761A (en) Washing wastewater recycling system
WO2007077575A3 (en) A waste water treatment plant
CN216236486U (en) Sewage circulation treatment device

Legal Events

Date Code Title Description
REGI Registration of establishment
FPAY Annual fee payment

Payment date: 20060713

Year of fee payment: 3

LAPS Lapse due to unpaid annual fee