CN110902826A - Low-emission N2O water treatment system and treatment method - Google Patents
Low-emission N2O water treatment system and treatment method Download PDFInfo
- Publication number
- CN110902826A CN110902826A CN201911215598.5A CN201911215598A CN110902826A CN 110902826 A CN110902826 A CN 110902826A CN 201911215598 A CN201911215598 A CN 201911215598A CN 110902826 A CN110902826 A CN 110902826A
- Authority
- CN
- China
- Prior art keywords
- reaction tank
- central cylinder
- tank
- water treatment
- water
- 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.)
- Granted
Links
Images
Classifications
-
- 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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a low-emission nitrous oxide (N)2O), belongs to the field of sewage treatment and aims to provide a low-emission N2The water treatment system and the method creatively combine the green fiber carrier with special structure with the water treatment technology to realize high-efficiency denitrification and effectively inhibit the water treatment process N2O generation and greenhouse effect reduction. The technical scheme is as follows: comprises a main body reaction tank and a sedimentation tank; the main reaction tank is a sealed container, and the bottom of the tank is designed in a conical or arc shape; the main reaction tank is filled with microorganism carriers, an aeration device is arranged in the bottom of the main reaction tank, a water inlet, an air inlet and an evacuation port are arranged outside the main reaction tank, a water outlet is arranged outside the upper part of the main reaction tank, and an exhaust port is arranged outside the top of the main reaction tank; the upper part of the sedimentation tank is externally provided with a water outlet, and the bottom of the sedimentation tank is externally provided with a sludge outlet.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to low-emission N2O water treatment system and method.
Background
Nitrous oxide (N)2O) is a trace greenhouse gas, and is closely related to global warming and depletion of tropospheric ozone. Greenhouse gases important in the atmosphere mainly include carbon dioxide (CO)2) Ozone (O)3) Dinitrogen monoxide (N)2O), methane (CH)4) Hydrofluorocarbons (CFCs, HFCs, HCFCs), Perfluorocarbons (PFCs), sulfur hexafluoride (SF6), and the like, wherein N is2The concentration of O is far lower than that of CO2But its monomolecular warming potential is CO2296 times higher than that of the total greenhouse effect, accounting for about 5% of the total greenhouse effect. Currently, global N2O remains increasing every year, estimated and predicted from many developed countries, such as the United states, Japan, and Germany, N2The warming effect of O on global climate will become more and more significant in the future, N2The increase in the concentration of O has attracted considerable attention from scientists.
It is estimated that more than 90% of N in the atmosphere2O is derived from the nitrification and denitrification of microorganisms, which are mainly byproducts of the nitrification reaction (mainly occurring in the oxidation process of ammonia and hydroxylamine) and intermediates of the denitrification process (denitrifying bacteria do not have Nos reductase or have low activity). One of the important sources is the farmland ecosystem, caused by excessive application of nitrogen fertilizer in the farmland. Another important source is N caused by the biological denitrification of wastewater2And (4) discharging O. High organic load, low SRT, acidic condition, etc. in the nitration process, high oxidation-reduction potential, nitrate and nitrite in the denitrification processThe large accumulation of acid salts, etc. all result in N2The cause of O generation.
Therefore, from the development of the symbiosis of economy and environment, the search for more effective ways for reducing secondary pollution caused by the sewage/wastewater treatment process is one of the important issues of environmental protection at present.
Disclosure of Invention
The invention aims to reduce secondary pollution in the conventional sewage/wastewater treatment technology and provides low-emission N2The water treatment system and the method creatively combine the green fiber carrier with special structure with the water treatment technology to realize high-efficiency denitrification and effectively inhibit the water treatment process N2O generation and greenhouse effect reduction.
The technical purpose of the invention is realized by the following technical scheme:
low-emission N2The water treatment system of O comprises a main reaction tank and a sedimentation tank; the main reaction tank is a sealed container, and the bottom of the tank is designed in a conical or arc shape; the main reaction tank is filled with microorganism carriers, an aeration device is arranged in the bottom of the main reaction tank, a water inlet, an air inlet and an evacuation port are arranged outside the main reaction tank, a water outlet is arranged outside the upper part of the main reaction tank, and an exhaust port is arranged outside the top of the main reaction tank; the upper part of the sedimentation tank is externally provided with a water outlet, and the bottom of the sedimentation tank is externally provided with a sludge outlet.
Further, the microorganism carrier comprises a central cylinder and a basalt fiber bundle; the number of the basalt fiber bundles distributed around the circumference direction of the central cylinder is 4-10, and the basalt fiber bundles are distributed at equal intervals around the height direction of the central cylinder at intervals of 5-10 cm.
Furthermore, the basalt fiber bundle is formed by dispersing and fixing one end of a plurality of fiber filaments, the diameter of each fiber filament is 9-25 mu m, and the length of each fiber filament is 8-25 cm.
Furthermore, the diameter of the fiber filament is 13-22 μm, and the length of the fiber filament is 10-20 cm.
Furthermore, the central cylinder is of a circular hole or square hole net structure, and the diameter of the central cylinder is 5-20 cm.
Furthermore, the basalt fiber bundles are distributed around the central cylinder in the height direction at equal intervals of 5-10 cm.
Furthermore, the basalt fiber bundles are distributed around the central cylinder in the height direction at equal intervals of 6-8 cm.
Further, the central cylinder is laid right above the aeration device.
Furthermore, the water outlet pipeline adopts a U-shaped liquid seal design and is connected with the sedimentation tank.
Further, a low emission N2The water treatment method of O comprises the following operation steps:
s1, feeding domesticated activated sludge to the bottom of a main reaction tank, simultaneously injecting sewage to be treated until a carrier support is completely immersed, wherein the sludge concentration is 3-5 g/L, starting aeration and stuffy aeration for 24-48 h, stopping aeration for 30min, pumping supernatant, injecting the same amount of sewage to be treated, and continuing aeration; taking 6-10 h as a period, and carrying out acclimatization culture for 5-10 days;
s2, continuously pumping sewage into the main reaction tank from the water inlet, continuously aerating, wherein the sewage mainly rises along the height direction of the central cylinder under the action of aeration force, a small part of the sewage is diffused to the periphery through the grids of the central cylinder, the rising water flow reaches the top end of the central cylinder, is dispersed and then falls along the longitudinal arrangement direction of the basalt fibers, is fully contacted with the basalt fibers, the interior and free area of the central cylinder are aerobic environments, and the nitrification effect is generated to accumulate NOX-N; the inner area of the basalt fiber carrier forms an anoxic or anaerobic environment, and the denitrification takes place to synchronously remove NOX-N, reduction of N2Generation of O; and (4) enabling overflow water at the water outlet to enter a sedimentation tank for solid-liquid separation, discharging supernate and discharging residual sludge for disposal.
Further, the normal temperature operation of the main reaction tank is controlled, the pH range of the main reaction tank is controlled to be 6-7.5, the concentration range of dissolved oxygen is controlled to be 0.5-1.5 mg/L, and the hydraulic retention time is 24-40 h.
In conclusion, the invention has the following beneficial effects:
1. microorganisms in water are enriched and grown in the basalt fiber carrier cage-shaped structure, high-concentration biomass is kept, the residual sludge in the sedimentation tank is less, the residual sludge in the backflow sedimentation tank is not needed to adjust the sludge concentration in the reaction tank, power and energy consumption are saved, and operation and management are simple;
2. the basalt fiber carrier and the central cylinder are innovative and integrally designed, so that the aeration impact force can be effectively prevented from directly acting on the fiber filaments to cause the non-generational update and shedding of microorganisms, and the complex process that a common suspended filler needs to be independently woven and welded into a filler support is simplified.
3. The low dissolved oxygen concentration is controlled in the reaction tank, so that the accumulation of nitrate can be effectively inhibited, the nitration reaction and the denitrification reaction are simultaneously carried out, the high-efficiency denitrification is realized, and the intermediate product N is effectively inhibited2And (4) O production.
Drawings
FIG. 1 is a diagram of a water treatment system according to the present invention.
Wherein, 1-main body reaction tank; 2-a sedimentation tank; 3-a microbial carrier; 4-an aeration device; 5-U-shaped liquid seal pipeline; 11-a water inlet; 12-an air inlet; 13-a vent; 14-a water outlet; 15-an exhaust port; 21-a water outlet; 22-a sludge discharge port; 31-a central cylinder; 32-basalt fiber.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in FIG. 1, a low emission N2The water treatment system of O mainly comprises a main body reaction tank 1 and a sedimentation tank 2. The main reaction tank is a sealed container, and the bottom of the tank is designed in an arc shape; the reaction tank 1 is filled with microorganism carriers 3, the bottom of the reaction tank is internally provided with an aeration device 4, the reaction tank is externally provided with a water inlet 11, an air inlet 12 and a drain port 13, the upper part of the reaction tank is externally provided with a water outlet 14, and the top of the reaction tank is externally provided with an exhaust port 15; the microorganism carrier comprises a central cylinder 31 and a basalt fiber bundle 32; the central cylinder 31 is of a circular hole net structure, is made of plastic and has the diameter of 10 cm; the basalt fiber bundle 32 is formed by dispersing and fixing one end of a plurality of fiber filaments, the diameter of each fiber filament is 13-15 mu m, and the length of each fiber filament is 10 cm; the fixed end of the basalt fiber bundle 32 is glued with the central cylinder 31 in the normal direction; the basalt fiber bundles 32 are distributed in 8 bundles around the circumference of the central cylinder 31, and are distributed at equal intervals of 8cm around the height of the central cylinder 31. The aeration device 4 is laid right under the central cylinder 31. The water outlet 14 pipeline of the main reaction tank 1 is designed by a U-shaped liquid seal 5 and is connected with the sedimentation tank 2, a water outlet 21 is arranged outside the upper part of the sedimentation tank 2, and a sludge discharge port 22 is arranged outside the bottom of the sedimentation tank.
Example 1
The water treatment system is used for treating the pig farm sewage after pretreatment (primary sedimentation, hydrolytic acidification), and a contrast experiment is carried out by a synchronous conventional activated sludge method:
1. adding activated sludge of an aerobic pool of a domesticated municipal sewage treatment plant into the bottom of the main reaction tank 1, simultaneously injecting pig farm sewage until basalt fibers 3 are completely soaked, the sludge concentration is 4g/L, starting aeration and stuffy aeration for 36h, stopping aeration for 30min, pumping supernatant, injecting sewage of an equivalent pig farm, and continuing aeration; domesticating and culturing for 10 days with a period of 8 h.
2. The sewage is continuously pumped into the main reaction tank from the water inlet 11 and continuously aerated. Under the action of aeration, the sewage mainly rises along the height direction of the central cylinder 31, a small part of the sewage diffuses to the periphery through the grid of the central cylinder, and the rising water flow reaches the top end of the central cylinder, is dispersed and then falls along the longitudinal arrangement direction of the basalt fibers 32 and is fully contacted with the basalt fibers. The inside and free area of the central cylinder 31 are mostly aerobic environment, mainly generating nitrification and accumulating NOxN, forming an anoxic or anaerobic environment in the internal area of the basalt fiber carrier, mainly performing denitrification and synchronously removing NOx-N, reduction of N2And (4) generation of O. And the overflow water at the water outlet 14 enters the sedimentation tank 2 for solid-liquid separation, the supernatant is discharged, and the residual sludge is discharged for disposal.
Wherein the main reaction tank 1 is controlled to operate at normal temperature, the pH range of the reaction tank is controlled to be 6-7.5, the concentration of dissolved oxygen is about 1.0mg/L, and the hydraulic retention time is 36 h.
After the continuous operation for four months, the treatment effect of the water treatment system and the conventional activated sludge method is shown in the table 1.
TABLE 1 comparison of the treatment effect of the water treatment system of the present invention and the conventional activated sludge process
And judging according to the effluent quality effect, when the system is in a stable operation stage, collecting gas from the exhaust port every 2 days for 8 hours once, wherein the time duration of each time is 2 min. By means of butt-mixingN in the gas2The analysis of the result obtained by detecting the concentration of O shows that the N of the water treatment system of the invention2Average generation amount of O is about 2mg/g TN, and N of conventional activated sludge method2The average occurrence of O was about 20 mg/gTN. It can be seen that the system of the present invention is useful for reducing the greenhouse gas N2The emission of O has a significant effect.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (10)
1. Low-emission N2O, which is characterized by comprising a main reaction tank (1) and a sedimentation tank (2); the main reaction tank (1) is a sealed container, and the bottom of the tank is designed to be conical or arc-shaped; the main body reaction tank (1) is internally filled with a microorganism carrier (3), the bottom of the main body reaction tank is internally provided with an aeration device (4), a water inlet (11), an air inlet (12) and a drain opening (13) are arranged outside the main body reaction tank, the upper part of the main body reaction tank is externally provided with a water outlet (14), and the top of the main body reaction tank is externally provided with an exhaust port (; a water outlet (21) is arranged at the upper part of the sedimentation tank (2), and a sludge discharge port (22) is arranged at the bottom.
2. Low emissions N according to claim 12O, characterized in that the microbial carrier (3) comprises a central cylinder (31) and a basalt fiber bundle (32); the number of the basalt fiber bundles (32) is 4-10 bundles distributed around the circumference direction of the central cylinder (31), and the distance between the basalt fiber bundles and the central cylinder is 5-10 cm distributed at equal intervals around the height direction (31).
3. Low emissions N according to claim 22The water treatment system of O is characterized in that the basalt fiber bundle (32) is formed by dispersing and fixing one end of a plurality of fiber filaments, the diameter of each fiber filament is 9-25 mu m, and the length of each fiber filament is 8-25 cm.
4. Low emissions N according to claim 32The O water treatment system is characterized in that the diameter of the fiber yarn is 13-22 mu m, and the length of the fiber yarn is 10-20 cm.
5. Low emissions N according to claim 22O's water treatment system, characterized in that, central drum (31) is round hole or square hole network structure, diameter 5~20 cm.
6. Low emissions N according to claim 22The water treatment system of O is characterized in that the basalt fiber bundles (32) are equidistantly distributed around the central cylinder (31) in the height direction at intervals of 5-10 cm.
7. Low emissions N according to claim 22O, characterized in that said central cylinder (32) is laid directly above said aeration means (4).
8. Low emissions N according to claim 12O's water treatment system, characterized in that, delivery port pipeline (14) adopts U-shaped liquid seal design, with sedimentation tank (2) are connected.
9. Low-emission N2O, characterized by comprising the following operating steps:
s1, feeding domesticated activated sludge to the bottom of a main reaction tank (1), simultaneously injecting sewage to be treated until a carrier support is completely immersed, wherein the sludge concentration is 3-5 g/L, starting aeration and stuffy aeration for 24-48 h, stopping aeration for 30min, pumping supernatant, injecting the same amount of sewage to be treated, and continuing aeration; taking 6-10 h as a period, and carrying out acclimatization culture for 5-10 days;
s2, continuously pumping the sewage into the main body reaction tank from the water inlet, continuously aerating, wherein the sewage mainly rises along the height direction of the central cylinder (3) under the action of aeration force, a small part of the sewage is diffused to the periphery through grids of the central cylinder (3), and the rising water flow reaches the top (3) end of the central cylinder and is dispersed along the longitudinal direction of the basalt fibersThe arrangement direction is lowered, the basalt fibers are fully contacted, the inner part and the free area of the central cylinder (3) are in an aerobic environment, and NO is accumulated by nitrificationX-N; the inner area of the basalt fiber carrier forms an anoxic or anaerobic environment, and the denitrification takes place to synchronously remove NOX-N, reduction of N2Generation of O; and (3) enabling overflow water at a water outlet (14) to enter a sedimentation tank for solid-liquid separation, discharging supernate and discharging residual sludge for disposal.
10. Low emissions N according to claim 92The water treatment method of O is characterized in that the normal temperature operation of the main reaction tank (1) is controlled, the pH range of the main reaction tank (1) is controlled to be 6-7.5, the concentration of dissolved oxygen is about 0.5-1.0 mg/L, and the hydraulic retention time is 24-40 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911215598.5A CN110902826B (en) | 2019-12-02 | 2019-12-02 | Low-emission N2O water treatment system and treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911215598.5A CN110902826B (en) | 2019-12-02 | 2019-12-02 | Low-emission N2O water treatment system and treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110902826A true CN110902826A (en) | 2020-03-24 |
| CN110902826B CN110902826B (en) | 2022-07-05 |
Family
ID=69821769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911215598.5A Active CN110902826B (en) | 2019-12-02 | 2019-12-02 | Low-emission N2O water treatment system and treatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110902826B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111402697A (en) * | 2020-03-25 | 2020-07-10 | 湖北大学 | Activated sludge culture demonstration device and use method thereof |
| CN112028242A (en) * | 2020-07-29 | 2020-12-04 | 江苏大学 | Inhibition of N2Apparatus and method for O-bleed |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1850656A (en) * | 2006-05-31 | 2006-10-25 | 清华大学 | Method for treating phenol-contained waste water by anaerobic-aerobic coupled biological fluidizing bed |
| CN203639230U (en) * | 2013-12-25 | 2014-06-11 | 徐州工程学院 | Air-lift inner circulation combined filler bioreactor |
| WO2015062613A1 (en) * | 2013-11-04 | 2015-05-07 | Unisense Environment A/S | Control system for a wastewater treatment facility |
| CN104609566A (en) * | 2013-11-05 | 2015-05-13 | 中国石油化工股份有限公司 | Method for processing ammonia-containing wastewater by synchronous nitrification and denitrification |
| CN105600927A (en) * | 2015-12-30 | 2016-05-25 | 江苏艾特克环境工程设计研究院有限公司 | Wastewater simultaneous nitrification and denitrification denitrifying method and device |
-
2019
- 2019-12-02 CN CN201911215598.5A patent/CN110902826B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1850656A (en) * | 2006-05-31 | 2006-10-25 | 清华大学 | Method for treating phenol-contained waste water by anaerobic-aerobic coupled biological fluidizing bed |
| WO2015062613A1 (en) * | 2013-11-04 | 2015-05-07 | Unisense Environment A/S | Control system for a wastewater treatment facility |
| CN104609566A (en) * | 2013-11-05 | 2015-05-13 | 中国石油化工股份有限公司 | Method for processing ammonia-containing wastewater by synchronous nitrification and denitrification |
| CN203639230U (en) * | 2013-12-25 | 2014-06-11 | 徐州工程学院 | Air-lift inner circulation combined filler bioreactor |
| CN105600927A (en) * | 2015-12-30 | 2016-05-25 | 江苏艾特克环境工程设计研究院有限公司 | Wastewater simultaneous nitrification and denitrification denitrifying method and device |
Non-Patent Citations (2)
| Title |
|---|
| 冯晓西等主编: "《精细化工废水治理技术》", 31 March 2000, 化学工业出版社 * |
| 吕锡武等: "同步硝化反硝化脱氮及处理过程中N2O的控制研究", 《东南大学学报（自然科学版）》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111402697A (en) * | 2020-03-25 | 2020-07-10 | 湖北大学 | Activated sludge culture demonstration device and use method thereof |
| CN112028242A (en) * | 2020-07-29 | 2020-12-04 | 江苏大学 | Inhibition of N2Apparatus and method for O-bleed |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110902826B (en) | 2022-07-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101759323B (en) | Treatment combined process for pig farm waste water with high nitrogen content | |
| CN101767902B (en) | Method for treating rural wastewater | |
| CN102627353B (en) | Nitration denitrificatoin and filter method for double-sludge series-connection aeration biofilter, and nitration denitrification and filter device | |
| CN102730914B (en) | Method for processing livestock breeding wastewater by using anoxic membrane bioreactor | |
| CN101817615A (en) | Anaerobic-sequencing batch biofilm reactor-artificial wetland method for treating piggery wastewater | |
| CN102503033A (en) | Technique for treating pig raising liquid waste by circular anaerobic reactor, sequencing batch biofilm, constructed wetland and facultative lagoon | |
| CN103183447A (en) | Treatment method of piggery wastewater | |
| CN110902826B (en) | Low-emission N2O water treatment system and treatment method | |
| CN103332788B (en) | Multi-stage anaerobic-aerobic combined nitrogen and phosphorus removing device and method for rural domestic sewage | |
| CN104355500B (en) | A kind of Process for Treatment of Swine Wastewater and circulation reuse method | |
| CN204661509U (en) | A kind of portable totally-enclosed hospital sewage treating apparatus | |
| CN202658051U (en) | Aquaculture wastewater biochemical treatment system | |
| EP3907195A1 (en) | A phototrophic organism wastewater treatment apparatus, and the process thereof | |
| CN112919736A (en) | Anaerobic denitrification and methane removal device and method, sewage treatment system and method | |
| CN102101722B (en) | Novel membrane bioreactor for treating pig farm wastewater | |
| CN106277312B (en) | A kind of municipal sewage nitrogen rejection facility and its application | |
| KR100989106B1 (en) | Waste water treatment apparatus using immersion rotating biological contactor | |
| CN112551801B (en) | Breeding wastewater treatment method and system based on combined advanced oxidation technology | |
| CN212954721U (en) | Livestock and poultry breeding wastewater purification system | |
| CN101913702A (en) | Treatment system and treatment method for rural domestic sewage | |
| CN111675450A (en) | Biological aerated filter and ultraviolet disinfection equipment integrated system | |
| CN205676225U (en) | A kind of anaerobism processing percolate is held concurrently oxygen up-flow reactor | |
| CN210103667U (en) | Pig farm solid-liquid separation and processing system | |
| CN204138493U (en) | A kind of ecology water-culture device | |
| CN214167698U (en) | Aquaculture wastewater treatment system based on combined advanced oxidation technology |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |