CN110894123A - Deep denitrification system and method for sewage and wastewater - Google Patents
Deep denitrification system and method for sewage and wastewater Download PDFInfo
- Publication number
- CN110894123A CN110894123A CN201811062647.1A CN201811062647A CN110894123A CN 110894123 A CN110894123 A CN 110894123A CN 201811062647 A CN201811062647 A CN 201811062647A CN 110894123 A CN110894123 A CN 110894123A
- Authority
- CN
- China
- Prior art keywords
- unit
- sewage
- denitrification
- wastewater
- ozone
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- 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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention provides a deep denitrification system and a deep denitrification method for sewage and wastewater, wherein the deep denitrification system comprises an ozone catalytic oxidation reactor and a suspended filler biological deep denitrification reactor which are sequentially in fluid communication, the suspended filler biological deep denitrification reactor comprises a nitrification unit, a denitrification unit and a post-oxidation unit which are sequentially in fluid communication, and suspended fillers are arranged in the nitrification unit, the denitrification unit and the post-oxidation unit. The deep denitrification system and method for sewage and wastewater can reduce the total nitrogen to 3-5 mg/L or lower, which is far higher than the first-level A discharge standard, and reaches or approaches the four-class water quality requirements of ground level or the total nitrogen special limit requirement of industrial wastewater comprehensive discharge.
Description
Technical Field
The invention belongs to the field of industrial wastewater treatment, and particularly relates to a deep denitrification system and method for sewage and wastewater.
Background
The traditional biological nitrogen and phosphorus removal process for sewage/wastewater, such as AAO and the like, can remove most of nitrogen and can generally reach the first-level discharge standard. In order to enhance total nitrogen removal, biological nitrogen removal is preferably considered during biological sewage treatment, and chemical phosphorus removal is mainly used for phosphorus removal and biological phosphorus removal is used for auxiliary phosphorus removal so as to ensure that the total nitrogen removal reaches the first-class A or higher discharge standard. With the continuous improvement of the water quality requirements of sewage plants in China and places, the nitrogen capacity of the receiving water body in many areas is limited, and the total nitrogen of the external drainage is required to reach the four-class or quasi-three-class water quality of the ground level, namely, the concentration of the total nitrogen needs to be greatly reduced to 5mg/L or lower, so that the nitrogen of the tail water of the sewage plant needs to be effectively controlled and reduced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a deep denitrification system and a deep denitrification method for sewage and wastewater, aiming at the problems that the total nitrogen of effluent of a conventional biological denitrification system is still higher, especially the organic nitrogen which is difficult to biodegrade is higher, and the like. The deep denitrification system comprises an ozone catalytic oxidation reactor and a suspended filler biological deep denitrification reactor which are sequentially communicated by fluid, the suspended filler biological deep denitrification reactor comprises a nitrification unit, a denitrification unit and a post-oxidation unit which are sequentially communicated by fluid, and suspended filler is arranged in the nitrification unit, the denitrification unit and the post-oxidation unit. The deep denitrification method comprises the following steps: 1) under the action of ozone and a catalyst, organic nitrogen in the sewage and the wastewater is converted into ammonia nitrogen through catalytic oxidation of ozone; 2) nitrifying ammonia nitrogen into nitrite nitrogen and nitrate nitrogen under the action of nitrifying bacteria growing on the surface of the suspended filler in the sewage and wastewater treated in the step 1); 3) reducing nitrite nitrogen and nitrate nitrogen into nitrogen gas under the action of denitrifying bacteria on the surface of the suspended filler and an external carbon source in the sewage and wastewater treated in the step 2); 4) oxidizing the residual external carbon source of the sewage and wastewater treated in the step 3) into carbon dioxide under the action of heterotrophic bacteria on the surface of the suspended filler. The deep denitrification system and the deep denitrification method for the sewage and the wastewater can reduce the total nitrogen after the conventional biochemical treatment to 3-5 mg/L, which is far superior to the first-class A discharge standard and meets or approaches the four-class water quality requirements of the ground level or the special limit requirement of the total nitrogen of industrial wastewater comprehensive discharge. Compared with physical chemistry such as a breakpoint chlorination method, an ion exchange method, a membrane separation method and the like, the method has the advantages of mature technology, stable and reliable operation and low comprehensive cost. Compared with the denitrification biological filter, the method does not need to build a back washing facility and frequently back wash, greatly saves the construction cost and the running cost, and is simple to operate. Compared with the artificial wetland, the facility arrangement is compact and the occupied area is small.
The invention is realized by the following technical scheme:
the invention provides a deep denitrification system for sewage and wastewater, which comprises an ozone catalytic oxidation reactor and a suspended filler biological deep denitrification reactor which are sequentially in fluid communication, wherein the suspended filler biological deep denitrification reactor comprises a nitrification unit, a denitrification unit and a post-oxidation unit which are sequentially in fluid communication, and suspended fillers are arranged in the nitrification unit, the denitrification unit and the post-oxidation unit.
The material of the suspension filler is one of polyethylene, polypropylene or polyurethane, and the specific surface area is 500-1000 m2/m3. The shape of the suspended filler is one of a column, a wheel, a sheet and a sphere. The suspended filler is hydrophilic modified suspended filler.
If the nitrification unit, the denitrification unit and the post-oxidation unit are built together, adjacent units are separated by the baffle, the baffle is provided with holes, and sewage and wastewater of the nitrification unit sequentially passes through the denitrification unit and the post-oxidation unit through the holes on the baffle. If the nitrification unit, the denitrification unit and the post-oxidation unit are separately built, sewage and wastewater of the nitrification unit sequentially passes through the denitrification unit and the post-oxidation unit through overflow under the condition of meeting gravity flow, and sequentially passes through the denitrification unit and the post-oxidation unit through water pump lifting if the sewage and wastewater of the nitrification unit cannot meet the gravity flow.
Preferably, the ozone catalytic oxidation reactor comprises an ozone generating unit, a catalytic oxidation unit and a mixing unit for mixing ozone and sewage and wastewater, wherein the ozone generating unit, the mixing unit and the catalytic oxidation unit are communicated in sequence.
Preferably, an aeration component is arranged in the nitrification unit, and the nitrification unit is provided with dissolved oxygen by the aeration component and simultaneously mixes the suspended filler and the sewage and wastewater.
Preferably, at least one of the following technical features is also included:
1) a stirring component, such as an impeller stirrer and an underwater propulsion stirrer, is arranged in the denitrification unit for mixing and stirring;
2) the device also comprises an external carbon source adding unit, wherein the external carbon source adding unit is communicated with the denitrification unit.
Preferably, at least one of the following technical features is also included:
1) an aeration component is arranged in the post oxidation unit, the post oxidation unit provides dissolved oxygen through the aeration component, and meanwhile, the suspended filler and the sewage and wastewater are mixed.
2) And a grid is arranged in the post-oxidation unit and used for retaining the suspended filler.
The invention provides a deep denitrification method for sewage and wastewater, which comprises the following steps:
1) under the action of ozone and a catalyst, organic nitrogen in the sewage and the wastewater is converted into ammonia nitrogen through catalytic oxidation of ozone; macromolecular benzene rings of the organic matters difficult to biodegrade in the sewage and the wastewater are broken to open rings or unsaturated bonds;
2) nitrifying ammonia nitrogen into nitrite nitrogen and nitrate nitrogen under the action of nitrifying bacteria growing on the surface of the suspended filler in the sewage and wastewater treated in the step 1);
3) reducing nitrite nitrogen and nitrate nitrogen into nitrogen gas under the action of denitrifying bacteria on the surface of the suspended filler and an external carbon source in the sewage and wastewater treated in the step 2);
4) oxidizing the residual external carbon source of the sewage and wastewater treated in the step 3) into carbon dioxide under the action of heterotrophic bacteria on the surface of the suspended filler.
Preferably, step 1) further comprises at least one of the following technical features:
1) the catalyst for catalytic oxidation by ozone is a homogeneous or heterogeneous catalyst, for example, the homogeneous catalyst is a soluble transition metal (such as iron) compound, and the heterogeneous catalyst is metal-supported activated carbon or iron-based oxide, etc.;
2) the reaction time of the catalytic oxidation of the ozone is 30-60 minutes;
3) the adding amount of the ozone is 10-30 mg/L.
Preferably, step 2) further comprises at least one of the following technical features:
1) the retention time of the nitrification water power is 1-5 h;
2) the concentration of dissolved oxygen is 2-4 mg/L;
3) the adding ratio of the suspended filler is 30-60%.
Preferably, step 3) further comprises at least one of the following technical features:
1) the residence time of the denitrification water power is 1 to 4 hours
2) The dissolved oxygen concentration is less than 0.5 mg/L;
3) the adding ratio of the suspended filler is 30-60%;
4) the external carbon source is selected from at least one of methanol, ethanol, glycerol, acetic acid and sodium acetate;
6) the carbon-nitrogen ratio of the external carbon source to the matter to be denitrified is 4-6.
Preferably, step 4) further comprises at least one of the following technical features:
1) the post-oxidation hydraulic retention time is 0.5-2 h;
2) the concentration of dissolved oxygen is 2-4 mg/L;
3) the adding ratio of the suspended filler is 30-60%.
The deep denitrification system and the deep denitrification method for the sewage and the wastewater can reduce the total nitrogen after the conventional biochemical treatment to 3-5 mg/L, are far superior to the first-level A discharge standard, and meet or approach the four-class water quality requirements of the ground level or the special limit requirement of the total nitrogen of industrial wastewater comprehensive discharge. Compared with physical chemistry such as a breakpoint chlorination method, an ion exchange method, a membrane separation method and the like, the method has the advantages of mature technology, stable and reliable operation and low comprehensive cost. Compared with the denitrification biological filter, the method does not need to build a back washing facility and frequently back wash, greatly saves the construction cost and the running cost, and is simple to operate. Compared with the artificial wetland, the facility arrangement is compact and the occupied area is small.
Drawings
FIG. 1 is a schematic view of an advanced nitrogen removal system for sewage and wastewater according to the present invention.
Reference numerals:
1-an ozone catalytic oxidation reactor;
2-a suspended filler biological deep denitrification reactor;
21-a nitrification unit;
22-a denitrification unit;
221-a stirring assembly;
23-a post oxidation unit;
231-a grid;
24-suspended filler.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
It is to be understood that the processing equipment or apparatus not specifically identified in the following examples is conventional in the art.
Furthermore, it is to be understood that one or more method steps mentioned in the present invention does not exclude that other method steps may also be present before or after the combined steps or that other method steps may also be inserted between these explicitly mentioned steps, unless otherwise indicated; it is also to be understood that a combined connection between one or more devices/apparatus as referred to in the present application does not exclude that further devices/apparatus may be present before or after the combined device/apparatus or that further devices/apparatus may be interposed between two devices/apparatus explicitly referred to, unless otherwise indicated. Moreover, unless otherwise indicated, the numbering of the various method steps is merely a convenient tool for identifying the various method steps, and is not intended to limit the order in which the method steps are arranged or the scope of the invention in which the invention may be practiced, and changes or modifications in the relative relationship may be made without substantially changing the technical content.
The efficacy of the invention is illustrated below with reference to specific examples.
Example 1
The utility model provides a degree of depth denitrogenation system of dirty waste water, as shown in figure 1, including ozone catalytic oxidation reactor 1, the biological degree of depth denitrogenation reactor 2 of suspension filler that fluid intercommunication in proper order, biological degree of depth denitrogenation reactor 2 of suspension filler is including the nitrification unit 21, the denitrification unit 22 and the after-oxidation unit 23 of fluid intercommunication in proper order, all be equipped with suspension filler 24 in nitrification unit 21, denitrification unit 22 and the after-oxidation unit 23. Ozone catalytic oxidation reactor 1 includes ozone generation unit, catalytic oxidation unit and is used for the mixing unit that mixes ozone and dirty waste water, ozone generation unit, mixing unit and catalytic oxidation unit communicate in proper order. An aeration component is arranged in the nitrification unit 21, and the nitrification unit is provided with dissolved oxygen by the aeration component and simultaneously mixes the suspended filler and the sewage and wastewater. A stirring component, such as an underwater propulsion stirrer, is arranged in the denitrification unit 22 for mixing and stirring; the device also comprises an external carbon source adding unit, and the external carbon source adding unit is communicated with the denitrification unit 22. An aeration component is arranged in the post-oxidation unit 23, and the post-oxidation unit provides dissolved oxygen by the aeration component and simultaneously mixes the suspended filler and the sewage and wastewater. A grid is arranged in the post-oxidation unit 23 and used for retaining the suspended filler.
The suspension filler is made of high-density polyethylene, is in a wheel or disc shape, and has a specific surface area of 500-600 m2/m3。
The deep denitrification method for the sewage and the wastewater in a certain petrochemical company comprises the following steps:
1) under the action of ozone and a catalyst, organic nitrogen in the sewage and the wastewater is converted into ammonia nitrogen through catalytic oxidation of ozone, the catalyst is a heterogeneous manganese catalytic material, the reaction time is 30 minutes, the adding amount of the ozone is 10-15 mg/L, and nitrogen-containing heterocycles or nitrogen-containing organic matters are oxidized into ammonia nitrogen;
2) nitrifying ammonia nitrogen into nitrite nitrogen and nitrate nitrogen under the metabolic action of nitrifying bacteria growing on the surface of the suspended filler in the sewage and wastewater treated by the ozone in the step 1), controlling hydraulic retention time to be 2-5 h, controlling dissolved oxygen concentration to be 2-4 mg/L, and controlling the adding ratio of the suspended filler to be 30-50%;
3) reducing nitrite nitrogen and nitrate nitrogen into nitrogen in the sewage and wastewater treated in the step 2) under the action of denitrifying bacteria on the surface of the suspended filler and an external carbon source, wherein the hydraulic retention time is 3 hours, the dissolved oxygen concentration is 0.05-0.25 mg/L, the adding ratio of the suspended filler is 30-50%, the external carbon source is sodium acetate, and the adding ratio of the external carbon source to the nitrogen to be removed is 4-6;
4) oxidizing the residual external carbon source of the sewage and wastewater treated in the step 3) into carbon dioxide under the action of heterotrophic bacteria on the surface of the suspended filler, wherein the hydraulic retention time is 1h, the dissolved oxygen concentration is 2-4 mg/L, and the adding ratio of the suspended filler is 30-50%.
The stable deep denitrification effect is obtained by the deep denitrification system and the deep denitrification method, the total nitrogen and nitrate nitrogen removal effect is shown in table 1, the total nitrogen of effluent is kept below 3mg/L, the total nitrogen removal rate is 79.2 +/-4.3%, the nitrate removal rate is as high as 93.1 +/-1.7%, and the discharge standard that the effluent of enterprises is discharged to sensitive water bodies independently is met.
TABLE 1 Denitrification effect of chemical sewage deep denitrification pilot plant system
| Index (I) | Inflow water | Discharging water | Removal Rate (%) |
| Total nitrogen (mg/L) | 9.56±1.34 | 1.97±0.38 | 79.2±4.3 |
| Nitrate nitrogen (mg/L) | 7.59±1.18 | 0.52±0.13 | 93.1±1.7 |
Note: in the table, "+/-" indicates the standard deviation.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a degree of depth denitrogenation system of dirty waste water, its characterized in that, includes ozone catalytic oxidation reactor (1), the biological degree of depth denitrogenation reactor (2) of suspension filler of fluid intercommunication in proper order, suspension filler biological degree of depth denitrogenation reactor (2) are including nitrifying unit (21), denitrification unit (22) and back oxidation unit (23) of fluid intercommunication in proper order, all be equipped with suspension filler (24) in nitrifying unit (21), denitrification unit (22) and back oxidation unit (23).
2. The deep nitrogen removal system for sewage wastewater according to claim 1, wherein the ozone catalytic oxidation reactor (1) comprises an ozone generating unit, a catalytic oxidation unit, and a mixing unit for mixing ozone with sewage wastewater, the ozone generating unit, the mixing unit, and the catalytic oxidation unit being in communication in this order.
3. The system for deep denitrification of sewage and wastewater according to claim 1, wherein an aeration means is provided in the nitrification unit (21).
4. The system for deep denitrification of wastewater according to claim 1, further comprising at least one of the following technical features:
1) a stirring assembly (221) is arranged in the denitrification unit (22);
2) the device also comprises an external carbon source adding unit, and the external carbon source adding unit is communicated with the denitrification unit (22).
5. The system for deep denitrification of wastewater according to claim 1, further comprising at least one of the following technical features:
1) an aeration component is arranged in the post oxidation unit (23);
2) a grid (231) is arranged in the post-oxidation unit (23) and is used for retaining the suspended filler.
6. The deep denitrification method of the sewage and the wastewater is characterized by comprising the following steps:
1) under the action of ozone and a catalyst, organic nitrogen in the sewage and the wastewater is converted into ammonia nitrogen through catalytic oxidation of ozone;
2) nitrifying ammonia nitrogen into nitrite nitrogen and nitrate nitrogen under the action of nitrifying bacteria growing on the surface of the suspended filler in the sewage and wastewater treated in the step 1);
3) reducing nitrite nitrogen and nitrate nitrogen into nitrogen gas under the action of denitrifying bacteria on the surface of the suspended filler and an external carbon source in the sewage and wastewater treated in the step 2);
4) oxidizing the residual external carbon source of the sewage and wastewater treated in the step 3) into carbon dioxide under the action of heterotrophic bacteria on the surface of the suspended filler.
7. The method for deep denitrification of sewage and wastewater according to claim 6, wherein the step 1) further comprises at least one of the following technical features:
1) the catalyst for catalytic oxidation of ozone is a homogeneous or heterogeneous catalyst;
2) the reaction time of the catalytic oxidation of the ozone is 30-60 minutes;
3) the adding amount of the ozone is 10-30 mg/L.
8. The method for deep denitrification of sewage and wastewater according to claim 6, wherein the step 2) further comprises at least one of the following technical features:
1) the retention time of the nitrification water power is 1-5 h;
2) the concentration of dissolved oxygen is 2-4 mg/L;
3) the adding ratio of the suspended filler is 30-60%.
9. The method for deep denitrification of sewage and wastewater according to claim 6, wherein the step 3) further comprises at least one of the following technical features:
1) the residence time of the denitrification water power is 1-4 hours;
2) the dissolved oxygen concentration is less than 0.5 mg/L;
3) the adding ratio of the suspended filler is 30-60%;
4) the external carbon source is selected from at least one of methanol, ethanol, glycerol, acetic acid and sodium acetate;
5) the carbon-nitrogen ratio of the external carbon source to the matter to be denitrified is 4-6.
10. The method for deep denitrification of sewage and wastewater according to claim 6, wherein the step 4) further comprises at least one of the following technical features:
1) the post-oxidation hydraulic retention time is 0.5-2 h;
2) the concentration of dissolved oxygen is 2-4 mg/L;
3) the adding ratio of the suspended filler is 30-60%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811062647.1A CN110894123A (en) | 2018-09-12 | 2018-09-12 | Deep denitrification system and method for sewage and wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811062647.1A CN110894123A (en) | 2018-09-12 | 2018-09-12 | Deep denitrification system and method for sewage and wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110894123A true CN110894123A (en) | 2020-03-20 |
Family
ID=69784941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811062647.1A Pending CN110894123A (en) | 2018-09-12 | 2018-09-12 | Deep denitrification system and method for sewage and wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110894123A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111732291A (en) * | 2020-03-27 | 2020-10-02 | 华南理工大学 | Advanced treatment combined process for printing and dyeing wastewater by ozone oxidation and aerobic denitrification |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4620302B2 (en) * | 2001-09-20 | 2011-01-26 | 三菱重工環境・化学エンジニアリング株式会社 | Organic wastewater treatment method |
| CN107324614A (en) * | 2017-08-30 | 2017-11-07 | 安徽华骐环保科技股份有限公司 | A kind of mark that carries is to the technique for treating industrial wastewater for being better than the class water quality of earth's surface IV |
| CN207468401U (en) * | 2017-08-30 | 2018-06-08 | 安徽华骐环保科技股份有限公司 | A kind of mark that carries is to the industrial waste water disposal device for being better than IV class water quality of earth's surface |
-
2018
- 2018-09-12 CN CN201811062647.1A patent/CN110894123A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4620302B2 (en) * | 2001-09-20 | 2011-01-26 | 三菱重工環境・化学エンジニアリング株式会社 | Organic wastewater treatment method |
| CN107324614A (en) * | 2017-08-30 | 2017-11-07 | 安徽华骐环保科技股份有限公司 | A kind of mark that carries is to the technique for treating industrial wastewater for being better than the class water quality of earth's surface IV |
| CN207468401U (en) * | 2017-08-30 | 2018-06-08 | 安徽华骐环保科技股份有限公司 | A kind of mark that carries is to the industrial waste water disposal device for being better than IV class water quality of earth's surface |
Non-Patent Citations (1)
| Title |
|---|
| 顾莹莹 等: "《废水是如何变清的 —倾听地球的脉搏》", 30 April 2012, 冶金工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111732291A (en) * | 2020-03-27 | 2020-10-02 | 华南理工大学 | Advanced treatment combined process for printing and dyeing wastewater by ozone oxidation and aerobic denitrification |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206232564U (en) | Coal chemical industrial waste water advanced treating and recycling processing system | |
| CN103723893B (en) | A kind of remove the method for nitrate nitrogen in water | |
| CN105481177A (en) | Low-consumption nitrification and denitrification coal chemical wastewater advanced treatment device | |
| CN101386460A (en) | Multi-stage composite processing technology of high-concentration organic sewage | |
| CN107585974B (en) | Sewage treatment method based on MBBR (moving bed biofilm reactor) process | |
| CN204779148U (en) | Coking wastewater advanced treatment and recycling system | |
| CN106277555A (en) | The high efficiency, low cost processing method of a kind of coking chemical waste water and system | |
| CN210103554U (en) | Chemical industry tail water strengthens denitrification facility | |
| CN217148724U (en) | Sewage treatment integrated biological nitrogen and phosphorus removal device | |
| CN101386439B (en) | Technique for processing organic wastewater by atmospheric catalytic oxidation at low-temperature | |
| CN105585123A (en) | Integrated biological powdered activated carbon adsorption and precipitation device and application method thereof | |
| CN105481170A (en) | Treating system and method for coking waste water | |
| CN110921982A (en) | System and method for treating coal chemical industry wastewater by biological catalytic oxidation technology | |
| CN208562075U (en) | Ozone oxidation-BAC filtering-composite catalytic oxidation advanced treatment on coking wastewater system | |
| CN105541012A (en) | Sewage nitrogen and phosphorus removal device with internal circulating biological aerated filter | |
| CN211813984U (en) | System for coal chemical industry waste water is handled to biological catalytic oxidation technique | |
| CN110894123A (en) | Deep denitrification system and method for sewage and wastewater | |
| CN106865908A (en) | The processing system and processing method of a kind of waster water of alkaline residul from oil refinery | |
| CN208562049U (en) | A kind of three-dimensional rural sewage treatment equipment | |
| CN214735172U (en) | Wastewater treatment device and wastewater treatment system | |
| CN108658393A (en) | The system and its processing method of ozone oxidation-BAC filterings-composite catalytic oxidation advanced treatment on coking wastewater | |
| CN205387501U (en) | Biological powdered activated carbon adsorption of integration deposits device | |
| CN214244097U (en) | High concentration landfill leachate's processing system | |
| CN210048616U (en) | Plasma sewage purification device | |
| CN210505964U (en) | DMF and DMAC high concentration waste water biological treatment system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200320 |