CN203890204U - Comprehensive treatment system of medical wastewater - Google Patents

Comprehensive treatment system of medical wastewater Download PDF

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Publication number
CN203890204U
CN203890204U CN201420330585.9U CN201420330585U CN203890204U CN 203890204 U CN203890204 U CN 203890204U CN 201420330585 U CN201420330585 U CN 201420330585U CN 203890204 U CN203890204 U CN 203890204U
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China
Prior art keywords
tank
water
pool
comprehensive treatment
treatment
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Expired - Fee Related
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CN201420330585.9U
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Chinese (zh)
Inventor
黄鑫宗
李绍森
黄文科
陈桂红
王洪艳
谢冠文
贺琦
林芳敏
莫晓晴
黄小惠
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ZHUHAI LEAGUER ENVIRONMENT ENGINEERING Co Ltd
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ZHUHAI LEAGUER ENVIRONMENT ENGINEERING Co Ltd
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Abstract

The utility model discloses a comprehensive treatment system of medical wastewater. The comprehensive treatment system comprises a treatment tank which is buried in the ground, wherein the treatment tank respectively comprises a water collection tank, a regulation tank, a hydrolytic acidification tank, a contact oxidation tank, a sedimentation tank and a disinfecting tank, wherein sealing covers are arranged at the upper ends of the water collection tank, the regulation tank, the hydrolytic acidification tank, the contact oxidation tank, the sedimentation tank and the disinfecting tank; a mechanical grid is arranged at a water outlet end of the water collection tank; the upper end and the lower end of the mechanical grid are respectively connected with the water collection tank. Through the comprehensive treatment system of medical wastewater, the hospital wastewater is treated by using combination of a hydrolytic acidification process, a contact oxidation process and a chlorine dioxide disinfecting process; in order to improve the biodegradability of the wastewater, the hydrolytic acidification process is used; the comprehensive treatment system is capable of solving the problem of biodegradability and has the characteristics of high efficiency and low cost, and is convenient to manage; the wastewater is treated by using the biological contact oxidation process after the biodegradability of the wastewater is improved, so that the microbial degradation efficiency is improved, and the occupied area is reduced; finally the chlorine dioxide is used for disinfecting the wastewater, so that the comprehensive treatment system is efficient and free of other pollutions.

Description

A kind of medical wastewater comprehensive treatment system
Technical field
The utility model relates to a kind of medical wastewater comprehensive treatment system.
Background technology
Hospital sewage belongs to sanitary sewage in broad terms, but pharmaceutical wastewater complicated component, concentration and salinity are high, colourity and toxicity large, often contain miscellaneous organic pollution materials, in these materials, there is the material that much belongs to bio-refractory, can within considerable time, retain in environment.Particularly to greatly " three cause " (carcinogenic, teratogenesis, mutagenesis) organic pollutant of human health risk, even if human health that still can serious harm when concentration is lower than 10-9 level in water body adopts traditional treatment process to be difficult to qualified discharge.And hospital sewage contains pathogenic bacteria.Therefore, when the emphasis that hospital sewage is administered is removed organic pollutant in addition, hold sterilization, therefore, remain difficult point and the focus of water treatment both at home and abroad at present.
The character of hospital wastewater:
1) hospital wastewater is subject to the pathogenic microbes pollutions such as ight soil, infective bacterial and virus, has infectivity, can induce an illness or damage;
2) in hospital wastewater, contain acid, alkali, suspended solids, BOD, COD and animals and plants wet goods poisonous and harmful substances;
3) process such as dental treatment, developing and printing and chemical examination produces sewage and contains heavy metal, sterilizing agent, organic solvent etc., and that part has is carcinogenic, teratogenesis or mutagenicity, is detrimental to health and environment is had to long-range impact;
4) isotope therapy and diagnosis produce radioactive dirty water.Radio isotope produces a-, β-and γ-radioactivity in decay process, is detrimental to health at people's cylinder accumulation.
The domestic technique to Medical waste water treatment mainly contains at present: simple biochemical processing process, conventional process method, AB method, SBR method, CASS method etc. are all the methods of taking for removing hospital wastewater.
1. simple and easy biochemical processing process
The flow process of simple and easy biochemical processing process is " marsh gas purifying pond → sterilization ".Marsh gas purifying pond is divided into solid-liquid displacement zone, anaerobic filter and sedimentation and filtration district.The major function in 3rd district is respectively removal suspended solids, and absorption colloid and dissolved matter are further removed and degradable organic pollutant, finally remove remaining suspension thing and degradable organic pollutant by precipitation and filtering unit, ensure effluent characteristics.The biogas that produces is done different processing according to tolerance size, when 1m3 mud Biogas reaches 15m3 when above, collects and utilizes; In the time of the not enough 15m3 of 1m3 mud Biogas, collect burn processing.Marsh gas purifying pond utilizes anaerobic digestion principle to carry out solid organic matters degraded.The processing efficiency in marsh gas purifying pond is better than septic tank and methane-generating pit, and cost is low, power consumption is low, and management is simple.It is up to standard that but the physical and chemical indexs such as water outlet COD, BOD can not ensure, can only be as the interim measure to outlying mountain area, economically underdeveloped area's Hospital Sewage Treatment.
2. conventional process method
Utilize the method such as mechanical aeration, blast aeration to oxygenation in sewage, make the microbial reproduction such as thread fungus and fungi in sewage, these microorganisms have absorption, oxidation, organism in degradation water and the ability of toxic substance, thus make the COD in sewage, and BOD index reduces.The general occupation of land of biological tank that traditional biological oxidation style adopts is larger, in aeration process, air is produced to secondary pollution, and construction investment is larger, and professionalization of management degree is high, and overheads and running cost are high.
3. AB method
AB method and traditional activated sludge process comparison: initial cost is saved 15%-20%, economize on electricity 20%-25%; Treatment effect is good, stable effluent quality, and BOD5 clearance is 90%-95%, and dephosphorization is 50%-70%, and denitrogenation is 30%-40%; A section surplus sludge volume large (approximately 20%), increases sludge treatment and takes, and has 2 cover sludge reflux systems, complex management; It is main and the high hospital sewage of concentration that AB method is applicable to sanitary sewage.
4. SBR method
SBR method is sequencing batch active sludge or intermittent activated sludge process, by water inlet, reaction (aeration), quiet heavy, draining, the sequence period operation such as idle.
SBR method is that the treatment facilities such as anaerobic digestion, aerobic decomposition and precipitation are placed in to one reaction pool, utilizes and controls each stage running time-program(me), reaches the result of expection.SBR method can be used for processing has inhibiting high concentration organic sewage to anaerobion.SBR method, because water inlet is interim in SBR pond, high concentration water mixes with low concentration of water in pond, dissolved oxygen in aeration waste water in fill phase for the highest, along with the carrying out of reaction, dissolved oxygen becomes Gradient Descent, then through processes such as digestion, decomposition, precipitations, in sewage, organic concentration is also diluted very soon, degrades.SBR method can be processed COD>10000mg/L, the sewage of high COD volumetric loading 6-10kg/ (m3d), and clearance is 80-90%.SBR method also can dephosphorization denitrogenation.
The technical characterstic of SBR method is that Sludge Property is good, anti impulsion load, and effluent quality is good and stable, and sludge creation rate is low, and the utilization ratio of dissolved oxygen is high; Though economic aspect capital cost and one-time investment expense are high, be easy to management, working cost is low, and floor space is little, comparatively suitable for hospital; Shortcoming be aeration use to charge and discharge pipe easily blocked, affect aeration effect, must often keep in repair.
5. CASS method
CASS (circulating active sludge method) is a kind of modified version of SBR, than SBR fado a biochemical zone, be to strain except cycles of operation of composition stage such as, water-fillings-idle by water-filling-aeration, water-filling-mud-water separation, supernatant liquor.Different operation phase and time can be adjusted according to handled sewage quality.The cycle of operation moves in circles; In reaction, the useful volume of sewage is a variate.This method is intake continuously, and main reaction region is divided into oxygen-starved area and aerobic zone.Order in reactor is criticized operation scheme: anaerobic-anoxic-oxic-anoxic-anaerobism.
Biochemical zone is located at the front end of CASS reactor, its volume accounts for 10% of cubic capacity, the sewage residence time is therein that 0.5-1.0h, sewage mix with the active sludge refluxing in main reaction region in biochemical zone, under the environment of anaerobism and double oxygen, quick adsorption organism, accelerates the oxygenolysis to organism and nuisance; Simultaneously for the de-Gas of dephosphorization creates conditions; And improved the degradation property of mud, and prevent sludge bulking, can reduce the generation of sludge quantity, for dehydration, the drying treatment of mud provide favourable condition.
But CASS also has shortcoming, the complex relationship between microbial population requires study, and decarburization dephosphorization efficiency by using is difficult to improve, and control mode is comparatively single, has limited applying of CASS.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of microbiological deterioration efficiency that improves, and reduces and takes up an area, and finally adopts disinfection by chlorine dioxide, the efficient medical wastewater comprehensive treatment system of other pollutions that do not produce simultaneously.
The utility model is achieved through the following technical solutions: a kind of medical wastewater comprehensive treatment system, it is characterized in that: comprise the treating pond being embedded in ground, described treating pond is respectively water collecting basin, equalizing tank, hydrolysis acidification pool, contact-oxidation pool, settling tank and sterilization pool, described water collecting basin, equalizing tank, hydrolysis acidification pool, contact-oxidation pool, the upper end of settling tank and sterilization pool is equipped with a sealing cover, realize the encapsulation process for the treatment of pond, the water outlet end of described water collecting basin is provided with a mechanical grille, the upper and lower ends of described mechanical grille is connected with water collecting basin respectively, described water collecting basin, equalizing tank, hydrolysis acidification pool, contact-oxidation pool, between settling tank and sterilization pool, be connected by a rising pipe respectively, between described water collecting basin and equalizing tank, be provided with a lift pump.
As preferred technical scheme, in described contact-oxidation pool, be provided with the three leaf roots blowers that an employing aeration provides oxygen, reduces organic content in water.
As preferred technical scheme, a dephosphorization medicine system is installed on the rising pipe of described contact-oxidation pool.
As preferred technical scheme, a sludge sump is installed in the bottom of described settling tank, and this sludge sump communicates with upper end settling tank, and the clear water of sludge sump is back to equalizing tank.
As preferred technical scheme, the inlet end of described sterilization pool is provided with a chlorine dioxide generator for generation of disinfection by chlorine dioxide, reduction Inactivation of Enteric Viruses In Water, bacterium equal size.
As preferred technical scheme, the water outlet of described sterilization pool connects a chlorine purifier for place to go water chlorine element.
As preferred technical scheme, one end of described water collecting basin taps into the mouth of a river, water outlet termination one rising pipe of described sterilization pool.
The beneficial effects of the utility model are: the utility model adds with acidication the combination that catalytic oxidation adds disinfection by chlorine dioxide technique to be processed hospital wastewater, for improving the biodegradability of waste water, select acidication technology, not only solving can biochemical problems, also keep efficient, cost is low, the feature of convenient management, after wastewater biodegradability improves, adopt again biological contact oxidation process to process, improve microbiological deterioration efficiency, reduce and take up an area, finally adopt disinfection by chlorine dioxide, the efficient while does not produce other pollutions.
Brief description of the drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is one-piece construction schematic diagram of the present utility model.
Embodiment
Disclosed all features in this specification sheets, or step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
Disclosed arbitrary feature in this specification sheets (comprising any accessory claim, summary and accompanying drawing), unless narration especially all can be replaced by other equivalences or the alternative features with similar object.,, unless narration especially, each feature is an example in a series of equivalences or similar characteristics.
As shown in Figure 1, the medical wastewater comprehensive treatment system of one of the present utility model, comprise the treating pond being embedded in ground, described treating pond is respectively water collecting basin 2, equalizing tank 6, hydrolysis acidification pool 7, contact-oxidation pool 9, settling tank 11 and sterilization pool 12, described water collecting basin 2, equalizing tank 6, hydrolysis acidification pool 7, contact-oxidation pool 9, the upper end of settling tank 11 and sterilization pool 12 is equipped with a sealing cover 3, realize the encapsulation process for the treatment of pond, the water outlet end of described water collecting basin 2 is provided with a mechanical grille 5, 5 upper and lower ends of described mechanical grille are connected with water collecting basin 2 respectively, described water collecting basin 2, equalizing tank 6, hydrolysis acidification pool 7, contact-oxidation pool 9, between settling tank 11 and sterilization pool 12, be connected by a rising pipe 4 respectively, between described water collecting basin 2 and equalizing tank 6, be provided with a lift pump (not shown).
As preferred embodiment, in contact-oxidation pool 9, be provided with the three leaf roots blowers 16 that an employing aeration provides oxygen, reduces organic content in water.
As preferred embodiment, a dephosphorization medicine system 8 is installed on the rising pipe of contact-oxidation pool 9.
As preferred embodiment, a sludge sump 15 is installed in the bottom of settling tank 11, and this sludge sump 15 communicates with upper end settling tank 11, and the clear water of sludge sump is back to equalizing tank.
As preferred embodiment, the inlet end of sterilization pool 12 is provided with a chlorine dioxide generator 10 for generation of disinfection by chlorine dioxide, reduction Inactivation of Enteric Viruses In Water, bacterium equal size.
As preferred embodiment, the water outlet of sterilization pool 12 connects a chlorine purifier 13 for place to go water chlorine element.
As preferred embodiment, one end of water collecting basin taps into the mouth of a river 1, water outlet termination one rising pipe 14 of described sterilization pool.
Wherein, (1) mechanical grille, equalizing tank
Hospital sewage Jing Yuan district pipe network is collected and certainly flow to grating tank after pre-treatment separately (septic tank, oil trap etc.), and floating matter contained in sewage and suspended impurity are excluded; Enter afterwards water collecting basin, enter equalizing tank through water collecting basin lift pump, in equalizing tank, carry out the homogenizing of water quality and quantity.
(2) hydrolysis acidification pool
In equalizing tank, sewage lifting enters hydrolysis acidification pool.
Hydrolysis (acidifying) treatment process is a kind of method between aerobic and anaerobic treatment method, and other process combination can reduce processing cost raising processing efficiency.Acidication technique is different from the hydrolysis acid-producing bacteria speed of growth according to methanogen, anaerobic treatment is controlled to shorter the first and second stages of anaerobic treatment in reaction times, under a large amount of hydrolytic bacterias, the effect of acidifying bacterium, be dissolved organic matter by insoluble hydrolysis of organic matter, the macromolecular substance of difficult for biological degradation is converted into the process of the small-molecule substance of readily biodegradable, thereby improve the biodegradability of waste water, for subsequent disposal is established good basis.
Hydrolysis refers to that organism enters the biochemical reaction carrying out before microorganism cells, born of the same parents outward.Microorganism completes biocatalytic reaction by the immobilized enzyme that discharges the outer free enzyme of born of the same parents or be connected on mantle.
Acidifying is the fermenting process of a quasi-representative, and the meta-bolites of microorganism is mainly various organic acids.
From mechanism, hydrolysis and acidifying are two stages of anaerobic digestion process, but the processing intent difference of different technique acidications.Hydrolysis object in acidication-aerobic biological treatment process is mainly to change the non-solubility organism in original waste water into dissolved organic matter, particularly trade effluent, mainly the organism of difficult for biological degradation is wherein changed into the organism of readily biodegradable, the biodegradability that improves waste water, is beneficial to follow-up aerobic treatment.Consider the energy consumption problem of follow-up aerobic treatment, hydrolysis is mainly used in the pre-treatment of lower concentration used water difficult to degradate.The object of the acidication in mixing anaerobic digestion process is to provide substrate for the methane fermentation of mixing anaerobic digestive process.And product acid in TPAD technique be mutually by the product acid in mixing anaerobic digestion mutually and methanogenic phase separate, to create optimum environment separately.
The bacterium of working in Hydrolysis Acidification is hydrolytic bacteria, acid-producing bacteria, all, under oxygen free condition, does not need power aeration, thereby hydrolysis acidification pool can, by organism Partial digestion under the condition of Non-energy-consumption, reduce running cost; Acidified hydrolytic bacteria can be converted into the organism of macromolecular difficult degradation the easily organism of degraded of small molecules simultaneously, improves the treatment effect of follow-up aerobic treatment unit.
(3) contact-oxidation pool
Hydrolysis acidification pool water outlet is from flowing into contact-oxidation pool, and under the condition of three leaf roots blower oxygen supplys, organism remaining in sewage is further decomposed into CO2, H2O etc. by the aerobic microbiological on filler;
The aerobic biological process for treating of waste water both at home and abroad conventional and technique comparative maturity be activated sludge process and biomembrance process, biomembrance process is divided into again blodisc, biological filter and contact oxidation method by microbial film dirt settling difference.Along with the development of chemical industry, biologic packing material is constantly updated, and develops into soft-filler again to semi soft packing from original plastic honeycomb filler, and contact oxidation method is more and more showed its superiority.Because catalytic oxidation has abundant biophase, in sewage of low concentration is processed, contact oxidation method has replaced activated sludge process gradually especially.
The principle of work of biological catalytic oxidation is in oxidizing reaction pond, to fill organic or inorganic carrier, and in the time that system is moved, filler is all immersed in sewage, and the microorganism in sewage is held back by carrier and adsorbs, and after cultivating and taming, forms microbial film.At the bottom of the pond of contact-oxidation pool, carry out aeration, water body fully contacts with oxygen, and in the time of waste water process microbial film, microorganism utilizes the organism in waste water to carry out growth metabolism and breeding, thereby pollutent is changed into some intermediate product or is thoroughly converted into CO2 and H2O, and waste water is purified.Microorganism on microbial film has certain growth cycle, microorganism is in the time of decline phase, decontamination effect improving to waste water is poor, now the shock action of waste water and gas comes off rapidly the microbial film on filler, the microbial film coming off is discharged reactor with current, and new microbial film can upgrade in time, thereby guarantee system can both be stablized and remove efficiently the pollutent in water body in whole service process.
Biological Contact Oxidation Process can be divided into: one-stage process biological contact oxidation process, two-phase method biological contact oxidation process and multiple process biological contact oxidation process, three's the key distinction is the catalytic oxidation hop count difference of waste water process.
Sewage enters contact-oxidation pool after primary sedimentation pond precipitation, after contact-oxidation pool is processed, enters two precipitations, carries out mud-water separation at secondary sedimentation basins, and mud is discharged system, and supernatant liquor is as processing water discharge.Two-stage method comprises two contact-oxidation pools, and each contact-oxidation pool belongs to complete mixed type, combines and becomes pulling flow type.Waste water enters one-level contact-oxidation pool after precipitating by primary sedimentation pond, after processing, contact-oxidation pool carries out mud-water separation in intermediate pool, mud is discharged system, supernatant liquor is injected to two-stage biological contact oxidation pond, after process in two-stage biological contact oxidation pond, carry out mud-water separation at secondary sedimentation basins, supernatant liquor is discharged as processing water, mud discharging, two sections of contact oxidation technologies are high to the removal efficiency of NH4+-N, and effluent quality is good.
(4) disinfect system
The waste water of settling tank is due to the intestinal bacteria that contain some amount, if enter urban sewage pipeline or environment water without disinfecting to let alone to discharge, these viruses, germ and parasitic ovum will become a concentrated secondary pollution source in environment, cause the generation of various diseases and spread, the serious threat mankind's is healthy.
The conventional sterilizing agent of Hospital Sewage Treatment has: the multiple sterilizing agents such as liquid chlorine, javelle water, dioxide peroxide, ozone.Feature from these several sterilizing agents: the network minimal of liquid chlorine, but dangerous large, can produce very serious consequence once reveal, generally can not adopt in densely populated urban district.The sterilisation effect of ozone is good, can residual harmful substance yet, also there is no at home that ripe equipment and equipment price are very high, working cost is also higher, so seldom use at home ozone.Dioxide peroxide is 3 times of clorox on sterilisation effect, it can not resemble clorox and chlorine and reacts halogenide such as producing carcinogenic haloform (THMs) with the organism in waste water in addition, can not react with ammonia nitrogen and generate ammonium chloride yet, be current internationally recognized spectrum powerful disinfectants of new generation, its sterilizing ability is far longer than other chlorine-containing disinfectant.The utility model adopts dioxide peroxide to make sterilizing agent.
The beneficial effects of the utility model are: the utility model adds with acidication the combination that catalytic oxidation adds disinfection by chlorine dioxide technique to be processed hospital wastewater, for improving the biodegradability of waste water, select acidication technology, not only solving can biochemical problems, also keep efficient, cost is low, the feature of convenient management, after wastewater biodegradability improves, adopt again biological contact oxidation process to process, improve microbiological deterioration efficiency, reduce and take up an area, finally adopt disinfection by chlorine dioxide, the efficient while does not produce other pollutions.
The above, be only embodiment of the present utility model, but protection domain of the present utility model is not limited to this, and any variation of expecting without creative work or replacement, within all should being encompassed in protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain that claims were limited.

Claims (7)

1. a medical wastewater comprehensive treatment system, it is characterized in that: comprise the treating pond being embedded in ground, described treating pond is respectively water collecting basin, equalizing tank, hydrolysis acidification pool, contact-oxidation pool, settling tank and sterilization pool, described water collecting basin, equalizing tank, hydrolysis acidification pool, contact-oxidation pool, the upper end of settling tank and sterilization pool is equipped with a sealing cover, realize the encapsulation process for the treatment of pond, the water outlet end of described water collecting basin is provided with a mechanical grille, the upper and lower ends of described mechanical grille is connected with water collecting basin respectively, described water collecting basin, equalizing tank, hydrolysis acidification pool, contact-oxidation pool, between settling tank and sterilization pool, be connected by a rising pipe respectively, between described water collecting basin and equalizing tank, be provided with a lift pump.
2. medical wastewater comprehensive treatment system according to claim 1, is characterized in that: in described contact-oxidation pool, be provided with the three leaf roots blowers that an employing aeration provides oxygen, reduces organic content in water.
3. medical wastewater comprehensive treatment system according to claim 1, is characterized in that: a dephosphorization medicine system is installed on the rising pipe of described contact-oxidation pool.
4. medical wastewater comprehensive treatment system according to claim 1, is characterized in that: a sludge sump is installed in the bottom of described settling tank, this sludge sump communicates with upper end settling tank, and the clear water of sludge sump is back to equalizing tank.
5. medical wastewater comprehensive treatment system according to claim 1, is characterized in that: the inlet end of described sterilization pool is provided with a chlorine dioxide generator for generation of disinfection by chlorine dioxide, reduction Inactivation of Enteric Viruses In Water, bacterium equal size.
6. medical wastewater comprehensive treatment system according to claim 1, is characterized in that: the water outlet of described sterilization pool connects a chlorine purifier for place to go water chlorine element.
7. medical wastewater comprehensive treatment system according to claim 1, is characterized in that: one end of described water collecting basin taps into the mouth of a river, water outlet termination one rising pipe of described sterilization pool.
CN201420330585.9U 2014-06-19 2014-06-19 Comprehensive treatment system of medical wastewater Expired - Fee Related CN203890204U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104829050A (en) * 2015-04-24 2015-08-12 怀化市康宇环保科技有限公司 Fully automatic control hospital sewage treatment method and device
CN105712577A (en) * 2016-02-04 2016-06-29 广州市朔康医疗科技有限公司 Reverse control energy-saving type medical wastewater treatment method and device
CN106927634A (en) * 2017-04-10 2017-07-07 浙江省现代建筑设计研究院有限公司 Waste water treatment system for hospitals

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104829050A (en) * 2015-04-24 2015-08-12 怀化市康宇环保科技有限公司 Fully automatic control hospital sewage treatment method and device
CN105712577A (en) * 2016-02-04 2016-06-29 广州市朔康医疗科技有限公司 Reverse control energy-saving type medical wastewater treatment method and device
CN106927634A (en) * 2017-04-10 2017-07-07 浙江省现代建筑设计研究院有限公司 Waste water treatment system for hospitals

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