CN202658051U - Aquaculture wastewater biochemical treatment system - Google Patents
Aquaculture wastewater biochemical treatment system Download PDFInfo
- Publication number
- CN202658051U CN202658051U CN 201220305206 CN201220305206U CN202658051U CN 202658051 U CN202658051 U CN 202658051U CN 201220305206 CN201220305206 CN 201220305206 CN 201220305206 U CN201220305206 U CN 201220305206U CN 202658051 U CN202658051 U CN 202658051U
- Authority
- CN
- China
- Prior art keywords
- reactor
- biochemical treatment
- treatment system
- water
- wastewater biochemical
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Activated Sludge Processes (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The utility model discloses an aquaculture wastewater biochemical treatment system, which comprises a screen pool, an adjusting pool and a disinfecting pool which are orderly connected through pipelines, wherein an anaerobic expanded granular sludge bed reactor and an immersion membrane bio-reactor (MBR) reactor are orderly connected between the adjusting pool and the disinfecting pool through the pipelines. The aquaculture wastewater biochemical treatment system adopts a combined method of traditional techniques and novel techniques, degrades organic pollutant in wastewater by utilizing high volume load of an anaerobic expanded granular sludge bed (EGSB) reactor, and increases biodegradability of the wastewater. An aerobic pond enables activated sludge to do aerobic respiration, and further decomposes organics into inorganic matters to achieve the function of removing pollutant. The aquaculture wastewater biochemical treatment system further biochemically treats the wastewater by adopting advantages of the MBR reactor, separates mud and water, and achieves the purpose of removing the organics, ammonia nitrogen and phosphorus through actions which are membrane separation effect and nitrification and denitrification effects and the like. Discharged water can achieve discharge standards by adding chlorine dioxide to disinfect after the discharged water from the MBR reactor enters the disinfecting pool.
Description
Technical field
It is a kind of breeding wastewater biochemical treatment system that the utility model relates to.
Background technology
China is livestock and poultry breeding industry big country; along with greatly developing of livestock and poultry breeding industry; the quantity of mass-producing, intensive culture field constantly increases; when driving rural economic development; also brought day by day serious problem of environmental pollution; not only affect Economic development, but also jeopardize ecological safety, become the social concern of people's common concern.According to statistics, the feces of livestock and poultry generation in China every year has reached 4,500,000,000 tons, and the wastewater flow rate that produces has reached 43% of sewage total amount, and this part breeding wastewater just directly discharges without properly recycling with processing, dispose mostly, and environment is caused severe contamination.This so that livestock breeding wastewater become or become with trade effluent and sanitary sewage quite even larger source of pollution.
Make its main water quality characteristic show the characteristics of " three height " because containing feces of livestock and poultry, urine, remaining feed etc. in the breeding wastewater, be organic pollutant (CODc
rAnd BOD
5) concentration is high, suspended substance (SS) concentration is high and N, P concentration are high, contains in addition a large amount of bacteriums, and the part material is difficult to biological degradation, belongs to more unmanageable high concentrated organic wastewater.In the face of more and more stricter from now on livestock breeding wastewater emission standard, at present domestic many plants waste water adopts is the supporting ecological agriculture cultivation schemes such as multi stage precipitation-oxidation scheme and stabilization pond, artificial swamp, mainly contains three kinds of modes: solid-liquid separation+methane-generating pit+aerobic aeration pond+oxidation pond; Methane-generating pit+facultative lagoon+oxidation pond; Directly enter the fish pond or be directly used in the fruit tree woods, but take these methods generally all can not reach discharging standards, and (DB44/613-2009) area, Pearl River Delta emission standard is farther apart from Guangdong Province " livestock and poultry breeding industry pollutant emission standard ".In addition, also have plant to introduce advanced liquid dung automatic separation equipment both at home and abroad, argol direct production granular fertilizer, sewage and purifying waste water recycles, but facility investment and operation cost are too high, are not suitable for present national conditions, are difficult to apply.A kind ofly can effectively dispose breeding wastewater in the urgent need to researching and developing for this reason, can realize again reduced investment, the efficient treatment system that operation cost is low, can solve the pollution difficult problem of livestock breeding wastewater, can promote the livestock and poultry breeding industry Sustainable Healthy Development again.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art and a kind of good waste water treatment effect is provided, stable effluent quality can reach (DB44/613-2009) the breeding wastewater biochemical treatment system of Pearl River Delta regional standard of Guangdong Province's " livestock and poultry breeding industry pollutant emission standard ".
A kind of breeding wastewater biochemical treatment system comprises the screen cloth pond, equalizing tank and the sterilization pool that connect by pipeline successively, connects successively anaerobic expanded granular sludge bed reactor and immersion MBR reactor by pipeline between described equalizing tank and the sterilization pool.
In the utility model, described anaerobic expanded granular sludge bed reactor bottom is connected with described equalizing tank water outlet by the perforated pipe water distribution system, the top of described anaerobic expanded granular sludge bed reactor is provided with methane outlet, the middle part is provided with the water outlet loop exit, the middle part water outlet of described anaerobic expanded granular sludge bed reactor is connected with the buffering pond, the bottom in described buffering pond is connected with the bottom cycle water inlet of described anaerobic expanded granular sludge bed reactor by recycle pump, and the water outlet in described buffering pond is connected with the water-in of described immersion MBR reactor.
In the utility model, described immersion MBR reactor comprises aerobic exposure chamber and membrane sepn chamber, described aerobic exposure chamber is positioned at described immersion MBR reactor front end and is connected with the water outlet in described buffering pond, and described membrane sepn chamber is positioned at described immersion MBR reactor rear end and is connected with described sterilization pool.
In the utility model, described membrane sepn chamber comprises membrane module and aeration tube, and described membrane module adopts flat sheet membrane or hollow-fibre membrane.
In the utility model, the bottom of described membrane sepn chamber is provided with the mud relief outlet, described mud relief outlet is connected with an end of Y-tube by pipeline, the other end of described Y-tube is connected with described aerobic exposure chamber, the 3rd end of described Y-tube is connected with described sludge thickener, the bottom of described sludge thickener is connected with sludge drying bed, and the upper end of described sludge thickener is provided with the filtrate in the described sludge thickener and supernatant liquor are back to the equalizing tank interface that described equalizing tank is processed.
In the utility model, the water outlet of described sterilization pool is connected with described clean water basin.
In the utility model, described equalizing tank bottom is provided with aerator.
Adopt said structure, the utility model adopts anaerobic expanded granular sludge bed (EGSB) reactor and immersion MBR reactor to combine, anaerobic expanded granular sludge bed (EGSB) reactor can effectively be removed the great amount of soluble organism under lower running cost, and can kill disease carrying germ, be conducive to the epidemic prevention of plant, and its high volumetric loading so that its initial cost greatly reduce, floor space is little, and start-up period is fast, capacity of resisting impact load is strong, stable effluent quality, the biogas utilization rate is high; And immersion MBR reactor, utilize membrane separation assemblies can improve activated sludge concentration, thereby improve the decomposition efficiency of hardly degraded organic substance, saved second pond, filtering basin etc., can save floor space and civil engineering costs, this device after combining can improve the processing efficiency of administering high concentrated organic wastewater greatly, so that effluent quality is good, stable, reach Guangdong Province's " livestock and poultry breeding industry pollutant emission standard " (DB44/613-2009), and can realize wastewater zero discharge, and operation cost is lower, and operating performance is stable, is fit to the processing of livestock breeding wastewater.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is schema of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, describe a kind of embodiment of breeding wastewater biochemical treatment system in detail.
As shown in Figure 1, 2, a kind of breeding wastewater biochemical treatment system, it comprises screen cloth pond 2, equalizing tank 3, anaerobic expanded granular sludge bed (EGSB) reactor 5, buffering pond 7, immersion MBR reactor 9 and the sterilization pool 19 that connects by pipeline successively.
Wherein, the effect in described screen cloth pond 2 is to remove larger impurity, particulate matter, carries out solid-liquid separation, guarantees the normal operation of subsequent disposal structures.
Described equalizing tank 3 adopts preferably homogeneous equalizing tank of water quality regulation effect.The effect of described equalizing tank 3 is variations of regulating the influent quality water yield, for subsequent disposal is created suitable flow condition.Be provided with aerator 4 in the homogeneous equalizing tank, the pneumatic blending effect that utilizes aeration to produce homogenizes waste water, alleviates the load of subsequent disposal unit.
Described anaerobic expanded granular sludge bed (EGSB) reactor 5 is by water distribution system, reaction zone, triphase separator, settling region, outlet system and go out water circulation system and form.Waste water is evenly entered by anaerobic expanded granular sludge bed (EGSB) reactor 5 bottom perforated pipe water distribution systems, after the mud mixture of granule sludge and gas-liquid separation zone backflow mixes, in the process of Uniform Flow that makes progress, under the high concentration sludge effect, most of organism is degraded and is converted into biogas, after triphase separator carries out gas-liquid-solid separation excessively, the biogas that produces is collected by enter into the biogas air chamber from methane outlet 6, mud mixture returns reaction zone after being precipitated by the settling region voluntarily, and fully mix with the mud of reactor bottom and water inlet, realized the internal recycling of mixed solution.Processing water after the precipitation flows out from reactor top in the outer circulation mode of overflow.Most of organism in the waste water is removed like this, has improved the biodegradability of waste water.
In order to increase the hydraulic load of reactor, guarantee treatment effect, described anaerobic expanded granular sludge bed (EGSB) reactor 5 effluent collection systems are provided with recycle pump 8 and buffered water pond 7, adopt the effluent recycling technology, backflow can be strengthened the internal recycle effect, can also dilute the substrate concn and the toxic substance concentration that enter in the EGSB reactor, reduce it to inhibition and the toxic action of microorganism.
Described immersion MBR reactor 9 is the integral type membrane bioreactor, and it comprises aerobic exposure chamber 10 and membrane sepn chamber 11.Described aerobic exposure chamber 10 is positioned at the reactor front end, and described membrane sepn chamber 11 is positioned at the reactor rear end.Described membrane sepn chamber 11 is comprised of membrane module and aeration tube.Membrane module is positioned at directly over the aeration tube, utilizes the shearing force of large aeration rate that membrane module is washed.Described membrane module can adopt flat sheet membrane or hollow-fibre membrane, and membrane material adopts polyvinylidene difluoride (PVDF) (PVDF), and membrane pore size is 0.4 μ m.Membrane surface is effectively cleaned by the Hydraulic Circulation stream of bottom aeration case 12, and aeration can effectively slow down active sludge and adhere to membrane surface, thereby guarantees stable filtration.
The membrane sepn chamber 11 of immersion MBR reactor 9 enters sludge thickener 15 by mud relief outlet 13 with excess sludge, before entering sludge thickener 15, by Y-tube 14 ducted filtrate is passed back into aerobic exposure chamber 10 again, after concentrated, mud enters mummifying pool 17, draws off and sieving slag outward transport compost treatment from crossing outward transport outlet 18 through drying and other treatment.And the filtrate in the sludge thickener 15 and supernatant liquor are back to the equalizing tank processing by equalizing tank interface 16.
Described sterilization pool 19 is by adding disinfection by chlorine dioxide, but the water outlet qualified discharge.
Described clean water basin 22 mainly are exactly to play the effect that stores water.
Concrete wastewater treatment flows to: breeding wastewater enters screen cloth pond 2 through collecting, and after screen cloth was removed larger impurity, particulate matter, waste water entered equalizing tank 3, and evenly water quality and quantity is the suitable flow condition of subsequent disposal creation; Waste water after pretreatment enters anaerobic expanded granular sludge bed (EGSB) reactor 5, the larger molecular organics matter such as protein at first resolves into small-molecule substance in the waste water under the effect of anaerobic digestion bacterium, and then the small-molecule substance part is degraded into CH under the effect of methanobacteria
4Deng material; Feed liquid through the EGSB reactor enters Aerobic Pond, and further organism is removed in degraded.Then waste water enters anaerobic expanded granular sludge bed (EGSB) reactor 5, does further biochemical treatment, and carries out mud-water separation.9 water outlets of immersion MBR reactor enter sterilization pool, by adding disinfection by chlorine dioxide, but the water outlet qualified discharge.
The biogas that anaerobic expanded granular sludge bed (EGSB) reactor 5 produces can store generating or burn processing.
This device adopts anaerobic expanded granular sludge bed (EGSB) reactor 5 to combine with immersion MBR reactor 9 to have following advantage:
Owing to adopting anaerobic expanded granular sludge bed (EGSB) reactor having more advantage than other reactors aspect the control anaerobic treatment influence factor:
A, volumetric loading are high: sludge concentration is high in the reactor, and microbial biomass is large, and has internal recycle, and mass transfer effect is good, has effectively solved common short stream, dead angle and blockage problem, and its water inlet organic loading can surpass more than 3 times of common anaerobic reactor;
B, reactor volume rate of load condensate exceed about 3 times of common anaerobic reactors, and its volume is equivalent to about 1/3 of common anaerobic reactor, greatly reduce the initial cost of reactor, and its aspect ratio is very large, so floor space is economized especially;
C, capacity of resisting impact load are strong, adopt the effluent recycling technology, and during for low-concentration organic waste water, reactor internal recycle flow can reach 2 ~ 3 times of flooding quantity; For ultrahigh concentration or contain the organic waste water of toxic substance, backflow can make the internal recycle flow reach 10 ~ 20 times of flooding quantity.A large amount of recirculated water and water inlet fully mix, and have diluted the substrate concn and the toxic substance concentration that enter in the reactor, greatly reduce it to inhibition and the murder by poisoning of microorganism.
D, anti-low temperature ability are strong: owing to containing a large amount of microorganisms, temperature becomes no longer significantly on the impact of anaerobic digestion and is serious in the reactor.Usually the EGSB reactor can carry out under normal temperature condition (20 ~ 25 ℃), has reduced like this difficulty of digestion insulation, has saved energy.
E, have the ability of buffer pH: the internal recycle flow is equivalent to the effluent recycling of anaerobic zone, and the basicity that can utilize COD to transform plays shock absorption to pH, makes that pH keeps optimum regime in the reactor, also can reduce simultaneously the throwing alkali number of water inlet.
F, start-up period are short: sludge activity is high in the reactor, and biological propagation is fast, for fast start up of reactor provides favourable condition.The EGSB reactor start-up cycle is generally 1 ~ 2 month, and common anaerobic reactor start-up period reaches 4 ~ 6 months;
G, biogas utilization are worth high: the biogas purity that reactor produces is high, CH
4Purity more than 70%, can be used as fuel and be used.
2, adopt immersion MBR reactor, it uses flat sheet membrane or the alternative settling tank of hollow-fibre membrane to carry out solid-liquid separation, has the high efficient solid and liquid separation characteristic, utilize simultaneously the characteristic of film, active sludge is not run off with water outlet, in biochemistry pool, form the activated sludge concentration of ultrahigh concentration, make the pollutent complete decomposition, effluent quality is good, stable, and its technical superiority is:
A, effluent quality are good, stable.The water flowing hole of membrane module carries out solid-liquid separation efficiently less than 0.4 μ m, and its separating effect is much better than traditional settling tank, goes out water suspension and turbidity close to zero.Combine the biochemical processing process of membrane separation technique, the MBR reactor produces water can satisfy strict emission standard, and can be applied to the non-type reuse field of drinking, such as the equipment wash water etc.
B, technique are simple.Because the high efficiency separation effect of film needn't be set up separately the solid-liquid separation tanks such as precipitation, filtration, also need not to add chemical agent, therefore also just cancelled the chemical agent dosing system that needs under the conventional situation.In addition, be subjected to sludge concentration and the larger mudpan of affect trait by cancellation, can be minimized the number of times of sampling and analysing chemical examination;
C, floor space are few.Membrane bioreactor can make active mud content maintain high density by the crown_interception of microfiltration membrane, volumetric loading is improved greatly, less than the needed pond of traditional activated sludge process appearance, saved second pond, filtering basin etc., therefore save floor space and civil engineering costs;
D, biochemical effective.Reactor moves under age at high volumetric loading, low sludge loading, long mud, has greatly improved the degradation efficiency of hardly degraded organic substance.Be beneficial to holding back and breeding of nitrobacteria, system's nitrification efficiency is high.Combination by operation scheme also can have denitrogenation and phosphorus removal functional.
E, sludge discharge are few, only have 30% of traditional technology, and the sludge treatment expense is low;
The objectionable impuritiess such as f, membrane bioreactor can the filtering bacteriums, virus can significantly be saved the long-time running expense that the dosing sterilization brings and be enlarged the reusing sewage scope;
G, system's shock resistance are strong, wide accommodation.Because high dirty concentration and the low sludge loading of biological treatment system, the while makes the mud surge capability of whole system very strong by the synergy of the high-grade filtration of membrane sepn realization, in the time of can be impacted in system, keeps good effluent quality;
H, preferably equipment and automatization, simple and convenient management;
G, modular design are easy to dilatation.
Claims (7)
1. breeding wastewater biochemical treatment system, comprise the screen cloth pond, equalizing tank and the sterilization pool that connect by pipeline successively, it is characterized in that: connect successively anaerobic expanded granular sludge bed reactor and immersion MBR reactor by pipeline between described equalizing tank and the sterilization pool.
2. breeding wastewater biochemical treatment system according to claim 1, it is characterized in that: described anaerobic expanded granular sludge bed reactor bottom is connected with described equalizing tank water outlet by the perforated pipe water distribution system, the top in described anaerobic expanded granular sludge bed reactor pond is provided with methane outlet, top is provided with the water outlet circulation port, the top water outlet of described anaerobic expanded granular sludge bed reactor is connected with the buffering pond, the bottom in described buffering pond is connected with the bottom cycle water inlet of described anaerobic expanded granular sludge bed reactor by recycle pump, and the water outlet in described buffering pond is connected with the water-in of described immersion MBR reactor.
3. breeding wastewater biochemical treatment system according to claim 2, it is characterized in that: described immersion MBR reactor comprises aerobic exposure chamber and membrane sepn chamber, described aerobic exposure chamber is positioned at described immersion MBR reactor front end and is connected with the water outlet in described buffering pond, and described membrane sepn chamber is positioned at described immersion MBR reactor rear end and is connected with described sterilization pool.
4. breeding wastewater biochemical treatment system according to claim 3, it is characterized in that: described membrane sepn chamber comprises membrane module and aeration tube, described membrane module adopts flat sheet membrane or hollow-fibre membrane.
5. breeding wastewater biochemical treatment system according to claim 4, it is characterized in that: the bottom of described membrane sepn chamber is provided with the mud relief outlet, described mud relief outlet is connected with an end of Y-tube by pipeline, the other end of described Y-tube is connected with described aerobic exposure chamber, the 3rd end of described Y-tube is connected with described sludge thickener, the bottom of described sludge thickener is connected with sludge drying bed, and the upper end of described sludge thickener is provided with the filtrate in the described sludge thickener and supernatant liquor are back to the equalizing tank interface that described equalizing tank is processed.
6. breeding wastewater biochemical treatment system according to claim 5, it is characterized in that: the water outlet of described sterilization pool is connected with described clean water basin.
7. according to claim 1 to one of 6 described breeding wastewater biochemical treatment systems, it is characterized in that: described equalizing tank bottom is provided with aerator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220305206 CN202658051U (en) | 2012-06-27 | 2012-06-27 | Aquaculture wastewater biochemical treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220305206 CN202658051U (en) | 2012-06-27 | 2012-06-27 | Aquaculture wastewater biochemical treatment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202658051U true CN202658051U (en) | 2013-01-09 |
Family
ID=47452971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220305206 Expired - Fee Related CN202658051U (en) | 2012-06-27 | 2012-06-27 | Aquaculture wastewater biochemical treatment system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202658051U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105174617A (en) * | 2015-09-11 | 2015-12-23 | 武汉市宜能环保科技有限公司 | Wastewater advanced treatment system of large-scale pig farm |
| CN105502818A (en) * | 2015-12-11 | 2016-04-20 | 凯天环保科技股份有限公司 | Membrane component and MBR (Membrane Biological Reaction) system applying same |
| CN105669261A (en) * | 2016-01-15 | 2016-06-15 | 中国农业科学院农业环境与可持续发展研究所 | Treatment and utilization method for reutilization of feces of livestock and poultry with three changes and two separations |
| CN107129036A (en) * | 2017-05-12 | 2017-09-05 | 天津中冀源环保科技有限公司 | Improve the method that anaerobic bio-treated produces high-purity methane |
| CN110436709A (en) * | 2019-08-14 | 2019-11-12 | 浙江巨能环境工程有限公司 | A kind of high concentration waste water of cis-anhydride processing unit and processing method |
-
2012
- 2012-06-27 CN CN 201220305206 patent/CN202658051U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105174617A (en) * | 2015-09-11 | 2015-12-23 | 武汉市宜能环保科技有限公司 | Wastewater advanced treatment system of large-scale pig farm |
| CN105502818A (en) * | 2015-12-11 | 2016-04-20 | 凯天环保科技股份有限公司 | Membrane component and MBR (Membrane Biological Reaction) system applying same |
| CN105669261A (en) * | 2016-01-15 | 2016-06-15 | 中国农业科学院农业环境与可持续发展研究所 | Treatment and utilization method for reutilization of feces of livestock and poultry with three changes and two separations |
| CN107129036A (en) * | 2017-05-12 | 2017-09-05 | 天津中冀源环保科技有限公司 | Improve the method that anaerobic bio-treated produces high-purity methane |
| CN110436709A (en) * | 2019-08-14 | 2019-11-12 | 浙江巨能环境工程有限公司 | A kind of high concentration waste water of cis-anhydride processing unit and processing method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101481194B (en) | town domestic sewage treatment process | |
| CN203878024U (en) | Wastewater treatment system for culture farm | |
| WO2017173708A1 (en) | Integrated reactor for biological treatment of livestock farm wastewater | |
| CN103435224A (en) | Waste water treatment technology for livestock breeding | |
| CN110627316B (en) | Breeding wastewater treatment process | |
| CN204848572U (en) | Birds is raised and grows effluent treatment plant | |
| CN101817615A (en) | Anaerobic-sequencing batch biofilm reactor-artificial wetland method for treating piggery wastewater | |
| CN102718360B (en) | Integrated livestock and poultry cultivating wastewater purification method | |
| CN103274571A (en) | Resource utilization and treatment method of livestock breeding wastewater | |
| CN103896442A (en) | Pig farm wastewater treatment method | |
| CN203307182U (en) | Resource utilization and regenerative recycling device of livestock and poultry breeding wastewater | |
| CN103183447A (en) | Treatment method of piggery wastewater | |
| CN202658051U (en) | Aquaculture wastewater biochemical treatment system | |
| CN105217898A (en) | A kind of Waste Water Treatment being applicable to middle-size and small-size plant | |
| CN106915867B (en) | Culture wastewater biochemical treatment system and preparation method and application of treatment by-product thereof | |
| CN103288302A (en) | Livestock/poultry breeding wastewater resource utilization and treatment device | |
| CN109502914B (en) | Sewage treatment system for treating biogas slurry by using chlorella | |
| CN204417278U (en) | Culturing wastewater processing system | |
| CN105152473A (en) | Culture waste water energy self circulation disposal system and method thereof | |
| CN210620525U (en) | Water-fertilizer co-production device for breeding manure | |
| CN219752089U (en) | Resource continuous treatment system for purifying biogas slurry based on energy chlorella | |
| CN201406361Y (en) | Waste leachate waste water processing device | |
| CN209797687U (en) | Ecological purification unit of milk cow plant liquid dung | |
| CN203333441U (en) | Resource utilization and treatment device of livestock and poultry breeding waste water | |
| CN206188598U (en) | Waste water treatment equipment that raises pigs intensifies |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130109 Termination date: 20150627 |
|
| EXPY | Termination of patent right or utility model |