CN214088173U - Water treatment system combining ozone and moving bed biofilm reactor - Google Patents
Water treatment system combining ozone and moving bed biofilm reactor Download PDFInfo
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- CN214088173U CN214088173U CN202023120852.4U CN202023120852U CN214088173U CN 214088173 U CN214088173 U CN 214088173U CN 202023120852 U CN202023120852 U CN 202023120852U CN 214088173 U CN214088173 U CN 214088173U
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- Treatment Of Water By Oxidation Or Reduction (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
A water treatment system combining ozone and a moving bed biofilm reactor is characterized by comprising an ozone treatment device (1) and a moving bed biofilm reactor (2); the water to be treated in the ozone treatment device (1) is subjected to an advanced oxidation reaction with ozone generated by the ozone treatment device; the water treated by the ozone treatment device enters the moving bed biofilm reactor (2); the moving bed biofilm reactor (2) comprises a biodegradation zone (11); the biodegradation zone is configured to remove organic matter from the water.
Description
Technical Field
The present disclosure relates to a water treatment system, and more particularly to a water treatment system combining ozone and a moving bed biofilm reactor.
Background
The non-degradable industrial wastewater refers to wastewater which is discharged in industrial production and is pretreated (including primary treatment, secondary biochemical treatment and tertiary treatment), and along with the upgrade of pollutant discharge standards of various industrial enterprises in various places, various industrial users are forced to consider further treatment of wastewater to be discharged after the tertiary treatment. The part of sewage is treated by a series of previous treatment measures, so that the treatment difficulty of various organic pollutants in the water is high, and the treatment needs to be carried out by some measures, such as strong oxidation (ozone and the like), activated carbon adsorption and the like, so as to meet the emission standard.
The actual industrial wastewater has complex components and contains various refractory organic pollutants, and a single advanced oxidation method cannot achieve ideal treatment effect on partial wastewater; meanwhile, researches show that biodegradable organic matters such as micromolecular unsaturated carboxylic acid and the like appear in oxidation products of certain advanced oxidation processes, and if the substances are selected to be continuously oxidized by hydroxyl radicals, a large amount of hydroxyl radicals are consumed, energy waste is caused, the operation cost is increased, and the actual treatment effect is not ideal. The biological treatment method has the advantages of low cost, mature process, large treatment capacity and the like.
Therefore, the advanced oxidation method and biological method coupling treatment technology takes biological treatment as the pretreatment or post-treatment process of the advanced oxidation process, shortens the advanced oxidation process with high energy consumption, such as reducing the ozone adding amount, and can realize the purpose of treating refractory organic matters with high efficiency and low cost. The combination of ozone and a biological filter is a common process of the type of combined technology, and the Oxyblue ozone biological filter combined process of Suez company is a novel sewage treatment patent technology integrating ozone oxidation and an aerobic biological filter, and is developed specially for removing refractory organic matters with poor biodegradability in industrial sewage. The process mainly utilizes the unique technical advantages of Suez in the biological filter, and is matched with different types of biological filters, such as
Upward flow biological aerated filter, or
The downward flow biological filter is used for treating refractory organic matters with different types and different concentrations. The biological filter tank has small occupied area, stable operation and larger bearing capacityImpact load and the like, but in daily operation, the head loss of the biological filter is large, and backwashing is one of the key factors for ensuring the stable operation of the filter. If the filter material is not washed sufficiently, the caking phenomenon can occur, so that the process fails in operation, and the strength and the wastewater amount of the biological filter are relatively high during backwashing.
In addition, in view of the recycling of industrial wastewater treatment generally considered at present, membrane treatment facilities are generally required to be built to further purify wastewater to achieve the purpose of recycling, the treatment demand on refractory organic matters in membrane concentrated water is increasing, the refractory organic matters in common membrane concentrated water are very high (COD is 150-200 mg/L), raw water with high pollution degree is treated in an ozone and biological filter tank mode, the treatment load requirement on a subsequent biological filter tank is high, according to the design treatment load of the biological filter tank (2-10 kgCOD/m3/d), more filter materials need to be filled to achieve higher COD removal rate, the tank capacity is large, and the investment is high. Therefore, there is a need to find an alternative biological treatment process for the treatment of high concentrations of refractory organics in combination with an ozone oxidation process.
SUMMERY OF THE UTILITY MODEL
In response to the shortcomings of existing biofilters that incorporate ozone, the present disclosure combines the features of ozone and Moving Bed Biofilm Reactors (MBBR) to provide a new combined process.
Chemical Oxygen demand (cod) (chemical Oxygen demand) is a chemical method for measuring the amount of reducing substances to be oxidized in a water sample. The oxygen equivalent of a substance (typically an organic substance) that can be oxidized by a strong oxidizing agent in wastewater, wastewater treatment plant effluent, and contaminated water. In the research of river pollution and the property of industrial wastewater and the operation management of wastewater treatment plants, it is an important and relatively fast measurable organic pollution parameter, often denoted by the symbol COD. Ozone has strong oxidation performance, fast reaction speed with reducing pollutant, convenient use, self decomposition in water in short time, no secondary pollution and ideal green oxidant. Ozone has a strong capacity of removing Chemical Oxygen Demand (COD) in wastewater, and can effectively improve the biodegradability of wastewater.
The moving bed biofilm reactor has the characteristics of large specific surface area, high organic load and the like. The combined process of the ozone and the moving bed biofilm reactor utilizes the preoxidation of the ozone to partially oxidize refractory organic matters in the wastewater, change the molecular structure of the organic matters, improve the biodegradability of the wastewater, and then utilize the biodegradation of the subsequent moving bed biofilm reactor to achieve the purpose of reducing and removing the organic matters. The combination of ozone and moving bed biofilm reactor has both chemical oxidation effectiveness and biological treatment economy, and the combined process can meet the wastewater treatment requirements at lower treatment cost.
In particular, to address one or more of the deficiencies in the prior art, a water treatment system that is a water treatment system with ozone in combination with a moving bed biofilm reactor is presented according to one aspect of the present disclosure.
The water treatment system comprises an ozone treatment device and a moving bed biofilm reactor.
The water to be treated in the ozone treatment device is subjected to an advanced oxidation reaction with ozone generated by the ozone treatment device.
And the water treated by the ozone treatment device enters the moving bed biofilm reactor.
The moving bed biofilm reactor comprises a biodegradation zone.
The biodegradation zone is configured to remove organic matter from the water.
According to the above aspect of the present disclosure, the ozone treatment device includes an ozone adding device and an ozone contact tank.
The ozone adding device adopts oxygen or air as raw materials and prepares ozone through discharging.
The ozone adding device is connected with the ozone contact tank, and ozone which is emitted from the ozone adding device and comprises generated ozone is added into the ozone contact tank.
According to the above aspects of the present disclosure, a residual ozone control device is provided between the ozone treatment device and the moving bed biofilm reactor to prevent residual ozone from entering the moving bed biofilm reactor.
The residual ozone control device comprises an ozone concentration detection device and an ozone tail gas destruction device.
According to the above aspects of the present disclosure, the ozone treatment apparatus further comprises a radial aerator configured for jet aeration.
The radial flow aerator is arranged at the bottom of the ozone contact tank.
And the ozone generated by the ozone adding device enters the ozone contact tank through the radial flow aerator.
According to the above aspects of the present disclosure, the ozone treatment device further includes a water inlet pipe.
The water inlet pipe is divided into two parts, one part is directly connected to the ozone contact tank, and the other part is connected to the ozone adding device.
Ozone, oxygen and the to-be-treated water from the water inlet pipe are introduced into the gas-liquid mixture of the ozone adding device, and the gas-liquid mixture passes through the radial flow aerator, so that uniformly distributed bubbles are formed in the ozone contact tank, and the diffusion and dissolution of the ozone and the oxygen into the water are promoted.
According to the above aspects of the present disclosure, the ozone treatment apparatus may further include a porous diffuser configured for bubbling aeration.
The porous diffuser is disposed at the bottom of the ozone contact tank.
And the ozone generated by the ozone adding device enters the ozone contact tank through the porous diffuser.
According to the above aspects of the present disclosure, the biodegradation zone comprises a biofilm carrier having carriers and aerobic microorganisms attached to the carriers.
The filling rate of the carrier is 40-60%.
The carrier adopts cylindrical plastic filler, and the specific surface area of the carrier is 250m2/m3To 800m2/m3Diameter of 8mm to 30mm, height andthe ratio of the diameters is in the range of 0.3 to 1.
The plastic packing has a skeletal support structure and a pore spacing of 2mm to 5 mm.
According to the above aspects of the present disclosure, the plastic filler is polyethylene.
According to the above aspects of the present disclosure, the moving bed biofilm reactor further comprises a tank body and a feed water distribution device located at the top of the tank body.
The water discharged by the ozone treatment device enters the tank body through the inlet water distribution device.
According to the above aspects of the present disclosure, the moving bed biofilm reactor further comprises an aeration system.
The aeration system is arranged at the bottom of the tank body.
The aeration system adopts ozone tail gas aeration or air aeration.
The biodegradation area is positioned in the tank body.
According to the above aspects of the present disclosure, the moving bed biofilm reactor further comprises a water outlet grid.
After passing through the biodegradation area, the effluent passes through the water outlet grille.
The water outlet grating is arranged to intercept the biological membrane carrier in the tank body, and then the outlet water enters a water producing channel.
According to the above aspects of the present disclosure, the residual ozone control means controls a residence time or distance between the water treated by the ozone treatment means and discharged to the moving bed biofilm reactor so that ozone is naturally decomposed, the residence time being at least 10 to 20 minutes.
According to the above aspects of the present disclosure, the residual ozone control device is a mechanical stirring device.
According to the above aspects of the present disclosure, the residual ozone control device is configured to administer a reducing agent to remove ozone.
According to the above aspects of the present disclosure, the ozone concentration detection device is a residual ozone concentration meter or an oxidation-reduction potential probe.
The process combination of the ozone treatment device and the moving bed biofilm reactor according to the disclosure has the effectiveness of chemical oxidation and the economy of biological treatment, and simultaneously, a back washing system is not required, so that the water head loss is reduced, the cost is saved, the operation is simple and convenient, and the operation is stable.
So that the manner in which the disclosure is made in detail herein can be better understood, and in which the contributions to the art may be better appreciated, the disclosure has been summarized rather broadly. There are, of course, embodiments of the disclosure that will be described below and which will form the subject matter of the claims appended hereto.
As such, those skilled in the art will appreciate that the conception upon which this disclosure is based may readily be utilized as a basis for the designing of other structures, methods and systems for carrying out the several purposes of the present disclosure. It is important, therefore, that the appended claims be regarded as including such equivalent constructions insofar as they do not depart from the spirit and scope of the present disclosure.
Drawings
The present disclosure will be better understood and its advantages will become more apparent to those skilled in the art from the following drawings. The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations and are not intended to limit the scope of the present disclosure.
FIG. 1 shows a schematic view of a water treatment system according to the present disclosure, in which jet aeration is employed;
FIG. 2 shows an enlarged schematic view of the moving bed biofilm reactor of FIG. 1 according to the present disclosure;
FIG. 3 illustrates the treatment effect of wastewater treated by the water treatment system according to the present disclosure;
FIG. 4 shows a schematic diagram of a water treatment system according to the present disclosure in which a bubbling aeration approach is employed.
Detailed Description
Specific embodiments according to the present disclosure are described in detail below with reference to the accompanying drawings.
Fig. 1 shows a schematic diagram of a water treatment system according to the present disclosure, which mainly comprises an ozone treatment apparatus 1 and a moving bed biofilm reactor 2 (i.e. MBBR tank), wherein the ozone treatment apparatus 1 comprises an ozone dosing apparatus 3, an ozone contact tank 7 and a residual ozone control apparatus 6 schematically indicated by arrows in fig. 1.
The ozone adding device 3 adopts oxygen or air as a raw material, ozone is prepared through discharging, the ozone adding device 3 is connected with the ozone contact tank 7, and mixed gas which is discharged from the ozone adding device 3 and comprises generated ozone and surplus air or oxygen is directly added into the ozone contact tank 7. Wastewater to be treated, which is schematically indicated by an arrow, is also introduced into the ozone contact tank 7 through the water inlet pipe 4, and is subjected to contact reaction with ozone, so that various organic matters and other reducing substances in the wastewater are oxidized by the ozone, and are degraded. After the wastewater is further oxidized, the excess ozone is treated by the residual ozone control device 6, and the excess air and oxygen are dissolved in the wastewater.
The ozone contact tank 7 is connected with the moving bed biofilm reactor 2, the wastewater discharged from the ozone contact tank 7 is introduced into the moving bed biofilm reactor 2 after ozone treatment and absorption of excess air and oxygen, organic matters which are difficult to degrade in the wastewater are further removed by the moving bed biofilm reactor 2, the wastewater meets the final discharge requirement, and effluent 5 schematically shown by an arrow is discharged or collected.
The ozone contact tank 7 may employ a bubbling or jet process to dissolve ozone and oxygen into the wastewater for further ozone treatment and subsequent supply of sufficient oxygen to the moving bed biofilm reactor 2. As shown in fig. 1, the wastewater passing through the water inlet pipe 4 is divided into two parts, one part directly enters the ozone contact tank 7 to be treated, the other part is introduced into the ozone adding device 3 upstream of the ozone adding device 3 in an upward flow manner, the mixture of the part of the wastewater introduced into the ozone adding device 3 and the ozone and the oxygen in the ozone adding device 3 is extracted from the top through a conduit to flow into the ozone contact tank 7 and is introduced to the bottom of the ozone contact tank 7 under the combined action of the gas pressure of the ozone and the oxygen in the ozone adding device 3 and the hydraulic pressure of the part of the wastewater introduced into the ozone adding device 3. A radial aerator 8-1 is provided at the end of the conduit at the bottom of the ozone contact tank 7. The part of the gas-liquid mixture of the ozone, the oxygen and the wastewater, which is introduced into the ozone adding device 3, forms small bubbles which are uniformly distributed in the ozone contact tank 7 through the radial flow aerator 8-1 (jet aeration), so that the diffusion of the ozone and the oxygen is promoted and the ozone and the oxygen are dissolved into the wastewater. After the ozone, the oxygen and the wastewater enter the ozone contact tank 7, the ozone, the oxygen and the wastewater are communicated to the lower part of the ozone contact tank 7, so that the ozone and the oxygen can further contact the wastewater from bottom to top, and further diffuse and dissolve into the wastewater. Finally, excess ozone and oxygen are discharged from the ozone contact tank to the residual ozone control device 6. It will be understood by those skilled in the art that the ozone treatment apparatus 1 may also replace the radial flow aerator 8-1 with a porous diffuser 8-2, the porous diffuser 8-2 being configured for bubble aeration, as shown in fig. 4. The porous diffuser 8-2 is disposed at the bottom of the ozone contact tank 7. Ozone generated by the ozone adding device 3 enters the ozone contact tank 7 through the porous diffuser 8-2.
As shown in fig. 1, fig. 2 and fig. 4, the moving bed biofilm reactor 2 comprises a tank body 9, an inlet water distribution device 10 positioned at the top of the tank body 9, a biodegradation zone 11 positioned inside the tank body, an aeration system 12 positioned at the bottom of the tank body and an outlet water grid 13 for intercepting carriers.
Fig. 2 shows a specific structure of a moving bed biofilm reactor 2. The moving bed biofilm reactor 2 is divided into a water inlet distribution device 10, a biodegradation area 11 and a water producing channel 14 from left to right. The wastewater discharged by the ozone treatment device 1 enters the tank body 9 from the inlet water distribution device 10 at one side. The biodegradation zone 11 comprises biofilm carriers having carriers and aerobic microorganisms attached to the carriers. The aerobic microorganisms are used to remove COD.
The filling rate of the carrier is 40-60%.
The carrier adopts a circleA columnar plastic filler with a specific surface area of 250m2/m3To 800m2/m3A diameter of 8mm to 30mm, a height to diameter ratio in the range of 0.3 to 1.
The plastic packing has a skeletal support structure and a pore spacing of 2mm to 5 mm. This increases both the surface area and compressive strength of the filler, while also meeting the effective transfer of contaminants and dissolved oxygen in the water to the biofilm. The plastic material is usually high density polyethylene, and the filler improves the surface roughness and hydrophilicity to facilitate the attachment of microorganisms.
After passing through the biodegradation zone of the moving bed biofilm reactor 2, the effluent 5 firstly passes through the effluent grille 113 for intercepting biofilm carriers in the moving bed biofilm reactor 2, and then enters the water producing channel 114 and is discharged out of the tank body 9.
An aeration system 112 can be arranged at the bottom of the moving bed biofilm reactor 2, and the aeration system can adopt ozone tail gas for aeration or air for aeration.
In order to ensure that the concentration of residual ozone dissolved in the wastewater discharged from the ozone contact tank 7 does not influence the microorganisms in the moving bed biofilm reactor 2, a residual ozone control device is arranged between the ozone contact tank 7 and the moving bed biofilm reactor 2 and is used for inhibiting the concentration of residual ozone in the wastewater treated by ozone before being introduced into the moving bed biofilm reactor 2, so that the residual ozone in the wastewater introduced into the moving bed biofilm reactor 2 is prevented from damaging the microorganisms in the moving bed biofilm reactor 2, and the activity of the microorganisms in the moving bed biofilm reactor 2 is prevented from being reduced.
The residual ozone control device can be realized by controlling the ozone concentration in the following ways:
1. controlling the retention time or distance between the wastewater discharge port after the ozone treatment and the inlet of the moving bed biofilm reactor 2 to naturally decompose the ozone, wherein the retention time is at least 10-20 minutes;
2. the decomposition of residual ozone is accelerated by physical means, such as the provision of mechanical agitation means (not shown);
3. controlling the concentration of residual ozone by a chemical method, such as adding a reducing agent, for example, hydrogen peroxide and the like to remove ozone;
4. a measuring instrument such as a residual ozone concentration meter or an oxidation-reduction potential probe (not shown) or the like is installed to monitor the residual ozone concentration.
The water treatment system according to the present disclosure achieves a good treatment effect in practical applications. For example, the COD of the effluent of a secondary sedimentation tank of a petrochemical wastewater tank is about 80-100 mg/L. The wastewater is treated by the combined process of the ozone treatment device and the moving bed biofilm reactor according to the disclosure, and the treatment target is COD lower than 50 mg/L. The COD of the inlet and outlet water is detected after the continuous operation for 35 days, and the removal rate of the COD by the process combination according to the disclosure reaches more than 50 percent, as shown in figure 3.
The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the embodiments to the precise form disclosed. Modifications and variations are possible in light of the above disclosure or may be acquired from practice of the embodiments.
Even though particular combinations of features are recited in the claims and/or disclosed in the specification, these combinations are not intended to limit the disclosure of the various embodiments. In fact, many of these features may be combined in ways not specifically recited in the claims and/or disclosed in the specification. Although each dependent claim listed below may depend directly on only one claim, the disclosure of various embodiments includes each dependent claim in combination with every other claim in the claim set.
No element, act, or instruction used herein should be construed as critical or essential unless explicitly described as such. In addition, as used herein, the articles "a" and "an" are intended to include one or more items, and may be used interchangeably with "one or more". Further, as used herein, the article "the" is intended to include the incorporation of one or more items referenced by the article "the" and may be used interchangeably with "one or more". Further, as used herein, the term "set" is intended to include one or more items (e.g., related items, unrelated items, combinations of related and unrelated items, etc.) and may be used interchangeably with "one or more". Where only one item is intended, the phrase "only one item" or similar language is used. In addition, as used herein, the term "having," variants thereof, and the like are intended to be open-ended terms. Further, the phrase "based on" is intended to mean "based, at least in part, on" unless explicitly stated otherwise. In addition, as used herein, the term "or" when used in series is intended to be inclusive and may be used interchangeably with "and/or" unless specifically stated otherwise (e.g., if used in conjunction with "or" only one of ").
Claims (15)
1. A water treatment system combining ozone and a moving bed biofilm reactor, which is characterized in that,
the water treatment system comprises an ozone treatment device (1) and a moving bed biofilm reactor (2);
the water to be treated in the ozone treatment device (1) is subjected to an advanced oxidation reaction with ozone generated by the ozone treatment device (1);
the water treated by the ozone treatment device (1) enters the moving bed biofilm reactor (2);
the moving bed biofilm reactor (2) comprises a biodegradation zone (11);
the biodegradation zone is configured to remove organic matter from the water.
2. The water treatment system of claim 1,
the ozone treatment device (1) comprises an ozone adding device (3) and an ozone contact tank (7);
the ozone adding device (3) adopts oxygen or air as a raw material and prepares ozone through discharging;
the ozone adding device (3) is connected with the ozone contact tank (7), and ozone which is emitted from the ozone adding device (3) and comprises generated ozone is added to the ozone contact tank (7).
3. The water treatment system of claim 2,
a residual ozone control device (6) is arranged between the ozone treatment device (1) and the moving bed biofilm reactor (2) to prevent residual ozone from entering the moving bed biofilm reactor (2);
the residual ozone control device (6) comprises an ozone concentration detection device and an ozone tail gas destruction device.
4. The water treatment system of claim 3,
the ozone treatment apparatus (1) further comprises a radial aerator (8-1) configured for jet aeration;
the radial flow aerator (8-1) is arranged at the bottom of the ozone contact tank (7);
ozone generated by the ozone adding device (3) enters an ozone contact tank (7) through a radial flow aerator (8-1).
5. The water treatment system of claim 4,
the ozone treatment device (1) also comprises a water inlet pipe (4);
the water inlet pipe (4) is divided into two parts, one part is directly connected to the ozone contact tank (7), and the other part is connected to the ozone adding device (3);
the gas-liquid mixture of ozone, oxygen and the water to be treated from the water inlet pipe (4) which is introduced into the ozone adding device (3) passes through the radial flow aerator (8-1), so that uniformly distributed bubbles are formed in the ozone contact tank (7) to promote the diffusion and dissolution of the ozone and the oxygen into the water.
6. The water treatment system of claim 3,
the ozone treatment apparatus (1) further comprises a porous diffuser (8-2) configured for bubbling aeration;
the porous diffuser (8-2) is arranged at the bottom of the ozone contact tank (7);
ozone generated by the ozone adding device (3) enters the ozone contact tank (7) through the porous diffuser (8-2).
7. The water treatment system according to claim 5 or 6,
the biodegradation zone (11) comprises a biofilm carrier having carriers and aerobic microorganisms attached to the carriers;
the filling rate of the carrier is 40-60%;
the carrier adopts cylindrical plastic filler, and the specific surface area of the carrier is 250m2/m3To 800m2/m3A diameter of 8mm to 30mm, a ratio of height to diameter in the range of 0.3 to 1;
the plastic packing has a skeletal support structure and a pore spacing of 2mm to 5 mm.
8. The water treatment system of claim 7,
the plastic filler is polyethylene.
9. The water treatment system of claim 7,
the moving bed biofilm reactor (2) also comprises a tank body (9) and a water inlet distribution device (10) positioned at the top of the tank body (9);
the water discharged by the ozone treatment device (1) enters the tank body (9) through the water inlet distribution device (10).
10. The water treatment system of claim 9,
the moving bed biofilm reactor (2) also comprises an aeration system (12);
the aeration system (12) is arranged at the bottom of the tank body (9);
the aeration system (12) adopts ozone tail gas aeration or air aeration;
the biodegradation area (11) is positioned inside the tank body (9).
11. The water treatment system of claim 10,
the moving bed biofilm reactor (2) also comprises a water outlet grid (13);
after passing through the biodegradation area (11), the effluent (5) passes through the water outlet grid (13);
the water outlet grille (13) is arranged to intercept a biofilm carrier in the tank body (9), and then the outlet water (5) enters a water producing channel (14).
12. The water treatment system of claim 11,
the residual ozone control device controls the retention time or distance between the water treated by the ozone treatment device (1) and the moving bed biofilm reactor (2) so as to naturally decompose the ozone, and the retention time is at least 10-20 minutes.
13. The water treatment system of claim 11,
the residual ozone control device is a mechanical stirring device.
14. The water treatment system of claim 11,
the residual ozone control device is configured to dose a reducing agent to remove ozone.
15. The water treatment system of claim 3,
the ozone concentration detection device is a residual ozone concentration meter or an oxidation-reduction potential probe.
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| CN202023120852.4U CN214088173U (en) | 2020-12-22 | 2020-12-22 | Water treatment system combining ozone and moving bed biofilm reactor |
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| CN202023120852.4U Active CN214088173U (en) | 2020-12-22 | 2020-12-22 | Water treatment system combining ozone and moving bed biofilm reactor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117566901A (en) * | 2023-12-19 | 2024-02-20 | 上海勘测设计研究院有限公司 | Ozone and MBBR combined pretreatment equipment and pretreatment process thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117566901A (en) * | 2023-12-19 | 2024-02-20 | 上海勘测设计研究院有限公司 | Ozone and MBBR combined pretreatment equipment and pretreatment process thereof |
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Address after: 3101, 27th Floor, Building 1, Yard 38, East 3rd Ring North Road, Chaoyang District, Beijing, 100026 Patentee after: Suez Environmental Technology (Beijing) Co.,Ltd. Address before: 100026 31 / F, Taikang financial building, building 1, courtyard 38, East Third Ring Road North, Chaoyang District, Beijing Patentee before: Suez Water Treatment Co,.Ltd. |
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