CN105010152A - Biogas slurry treatment system for cultivation and cultivation farm - Google Patents

Biogas slurry treatment system for cultivation and cultivation farm Download PDF

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Publication number
CN105010152A
CN105010152A CN201410165586.7A CN201410165586A CN105010152A CN 105010152 A CN105010152 A CN 105010152A CN 201410165586 A CN201410165586 A CN 201410165586A CN 105010152 A CN105010152 A CN 105010152A
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China
Prior art keywords
fermentation bed
natural pond
bed
treating system
cultivation
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Granted
Application number
CN201410165586.7A
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Chinese (zh)
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CN105010152B (en
Inventor
耿兵
赵永坤
俞晓芸
刘雪
叶婧
国辉
宫玉艳
朱昌雄
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Kaichuang Sun Environmental Science And Technology Development Beijing Co ltd
Institute of Environment and Sustainable Development in Agriculturem of CAAS
Original Assignee
Kaichuang Sun Environmental Science And Technology Development Beijing Co ltd
Institute of Environment and Sustainable Development in Agriculturem of CAAS
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Application filed by Kaichuang Sun Environmental Science And Technology Development Beijing Co ltd, Institute of Environment and Sustainable Development in Agriculturem of CAAS filed Critical Kaichuang Sun Environmental Science And Technology Development Beijing Co ltd
Priority to CN201410165586.7A priority Critical patent/CN105010152B/en
Publication of CN105010152A publication Critical patent/CN105010152A/en
Application granted granted Critical
Publication of CN105010152B publication Critical patent/CN105010152B/en
Expired - Fee Related legal-status Critical Current
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P60/00Technologies relating to agriculture, livestock or agroalimentary industries
    • Y02P60/20Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
    • Y02P60/22Methane [CH4], e.g. from rice paddies

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  • Fertilizers (AREA)
  • Hydroponics (AREA)

Abstract

The present invention discloses a biogas slurry treatment system for cultivation and a cultivation farm. The biogas slurry treatment system comprises a biogas slurry storage area (1), a fermentation bed (2) and a first drainage channel (3) that drains biogas slurry in the biogas slurry storage area (1) to the fermentation bed (2); and the fermentation bed (2) is separated from a cultivation area used for cultivation. According to the biogas slurry treatment system, the fermentation bed in the cultivation industry is used to perform further fermentation treatment on the biogas slurry, so that biogas slurry can be further utilized by changing padding of the fermentation bed to a fertilizer while consuming the biogas slurry; and therefore, the biogas slurry treatment problem in cultivation is effectively solved. Additionally, as the fermentation bed and the cultivation area used for cultivation are separately arranged, normal cultivation work is not influenced, design and stack of the fermentation bed are facilitated, and the treatment efficiency and effect of the biogas slurry are improved.

Description

Cultivation natural pond liquid treating system and plant
Technical field
The present invention relates to the natural pond liquid process in cultivation field, particularly, relate to the plant of a kind of plant natural pond liquid treating system and this natural pond liquid treating system of use.
Background technology
In aquaculture, livestock and poultry feces anaerobic fermentation can produce a large amount of natural ponds liquid, belongs to high pollution thing, cannot directly be disposed in environment, carries out process up to standard and causes again Construction and operation expense greatly to increase, therefore there is serious problem of dissolving by construction post-processed facility.In fact, containing abundant nitrogen in the liquid of natural pond, phosphorus, potassium, amino acid, abundant trace element, B family vitamin, various hydrolase, the bioactivator such as organic acid and humic acid is good organic manure, stimulates plant growth, strengthens crop anti-adversity and improves product quality.Therefore, natural pond liquid can use the secondary that can realize resource to utilize as fertilizer, such as, can supply existing growing area by the mode of drip irrigation.But near often existing, little, the long distance transportation high cost of growing area digestion capability utilization in not enough, winter etc. utilize the uneven and economy problems of spatial and temporal distributions, limit the feasibility that agricultural is dissolved to a certain extent.Therefore, the dissolve difficult popularization and the efficient stable operation for a long time that also directly limit biogas engineering of natural pond liquid.Along with the increase gradually of biogas engineering, the process problem of natural pond liquid becomes increasingly conspicuous.
Summary of the invention
An object of the present invention is to provide a kind of cultivation natural pond liquid treating system, this natural pond liquid treating system can make the natural pond liquid produced in breeding process effectively be dissolved and utilize.
Another object of the present invention is to provide a kind of plant, and this plant uses cultivation natural pond provided by the invention liquid treating system.
To achieve these goals, according to an aspect of the present invention, a kind of cultivation natural pond liquid treating system is provided, this natural pond liquid treating system comprise liquid storage area, natural pond, fermentation bed and by the natural pond liquid drainage in liquid storage area, described natural pond to the first drainage channel in described fermentation bed, and described fermentation bed is separated setting with cultivation culture zone.
Preferably, described natural pond liquid treating system also comprises diffusate collecting region and the diffusate of described fermentation bed is drained into the second drainage channel of described diffusate collecting region.
Preferably, the pumping installations pumped by diffusate is provided with in described diffusate collecting region.
Preferably, the shower nozzle that described first drainage channel comprises transfer pipeline and is communicated with this transfer pipeline, points to the bed body of this fermentation bed above the bed body that described shower nozzle is arranged on described fermentation bed.
Preferably, described shower nozzle is multiple and symmetry is arranged on the bed body both sides of described fermentation bed.
Preferably, described fermentation bed is multiple, described second drainage channel comprises the discharging tube bottom the bed body being laid in each fermentation bed along its length, on the tube wall of this discharging tube, compartment of terrain offers multiple inlet opening along its length, described second drainage channel also comprises the liquid header be communicated with the outlet end of the described discharging tube of multiple fermentation bed, and this liquid header is communicated with described diffusate collecting region.
Preferably, the bed body of described fermentation bed comprises bottom surface and is positioned at the side of these both sides, bottom surface, and wherein at least one side stretches out from described inclined bottom surface, and described discharging tube is laid in the corner between described bottom surface and at least one side described.
Preferably, described fermentation bed comprises the first fermentation bed and the second fermentation bed, the passageway for the walking of fermentation bed stirring equipment is provided with between this first fermentation bed and second fermentation bed, the length direction of this passageway and described first fermentation bed and the second fermentation bed extends in the same way, preferably, described fermentation bed stirring equipment is excavator.
Preferably, the bearing of trend bottom the bed body of described fermentation bed and horizontal direction are angularly obliquely installed.
According to a further aspect in the invention, provide a kind of plant, comprise cultivation culture zone, described plant also comprises natural pond provided by the invention liquid treating system.
Pass through technique scheme, the present invention uses the fermentation bed in aquaculture to carry out further fermentation process to natural pond liquid with starting, thus the bedding and padding of fermentation bed can also be made while natural pond liquid of dissolving to become fertilizer to utilize further natural pond liquid, therefore efficiently solve the process problem of natural pond liquid in cultivation.And because fermentation bed is separated setting with cultivation culture zone, normal cultivation work can not be had influence on, and be convenient to the design of fermentation bed and bank up, thus improve treatment effeciency and the effect of natural pond liquid.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 be in the natural pond liquid treating system that provides of the preferred embodiment for the present invention fermentation bed face structural representation (cutaway view), marsh liquid memory block;
Fig. 2 is the plan structure schematic diagram of fermentation bed local in the natural pond liquid treating system that provides of the preferred embodiment for the present invention, band diffusate collecting region;
Fig. 3 is the side-looking structural representation of fermentation bed local in the natural pond liquid treating system that provides of the preferred embodiment for the present invention.
Description of reference numerals
1 liquid memory block 2, natural pond fermentation bed
3 first drainage channel 4 diffusate collecting regions
5 second drainage channel 6 curtains
7 fermentation bed stirring equipment 8 columns
9 ceilings
21 first fermentation bed 22 second fermentation beds
23 passageway 31 transfer pipelines
32 shower nozzle 41 pumping installations
51 discharging tube 52 liquid headers
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
In the present invention, when not doing contrary explanation, the situation that the noun of locality used normally uses at natural pond provided by the invention liquid treating system usually as " upper and lower, the end, top, short transverse " is undefined, particularly, can with reference to the page shown in figure 1, in addition inside and outside " inside and outside " respective objects profile." length direction, width " is for the structure of fermentation bed in addition, and particularly as shown in Figure 2, length direction is the left and right directions of page, and width is the above-below direction of page.These nouns of locality, only for illustration of the present invention, are not limited to the present invention.
As shown in Figure 1 to Figure 3, the invention provides a kind of cultivation natural pond liquid treating system, to solve in breeding process, the natural pond liquid process problem that such as raise pigs, cowboying etc. produces.This natural pond liquid treating system comprise liquid storage area, natural pond 1, fermentation bed 2 and by the natural pond liquid drainage in liquid storage area, natural pond 1 to the first drainage channel 3 in fermentation bed 2, and fermentation bed 2 is separated setting with cultivation culture zone.Therefore, the present invention uses the fermentation bed 2 pairs of natural pond liquid in aquaculture to carry out further fermentation process with starting, thus the bedding and padding of fermentation bed 2 can also be made while natural pond liquid of dissolving to become fertilizer to utilize further natural pond liquid, therefore efficiently solve the process problem of natural pond liquid in cultivation.And because fermentation bed is separated setting with cultivation culture zone (such as pig house etc.), namely fermentation bed and the dystopy fermentation bed of separate type is adopted, culture zone can not be had influence on and cultivate work normally, and be convenient to the design of fermentation bed 2 and bank up, which increasing treatment effeciency and the effect of natural pond liquid.Thus can in aquaculture industry mass disposal utilize natural pond liquid, while control breeding pollution, improve natural pond liquid availability.
It should be noted that, the embodiment that can realize above-mentioned technical conceive has multiple, and natural pond liquid storage area 1 and following diffusate recovery area 4 can be pond shape structure in addition, also can be the structure arbitrarily with storage effect well known in the art.Therefore, the present invention for convenience of description, introduces preferred embodiment wherein at this, and this preferred embodiment, only for illustration of the present invention, is not limited to the present invention.
In a preferred embodiment of the invention, the natural pond liquid of liquid memory block, natural pond 1 can derive from the biogas engineering of plant, and removing is fed to the part of fermentation bed 2 by the first drainage channel 3, can also utilize difference in height or pumping installations that a part of natural pond liquid is fed to neighbouring growing area to be used as fertilizer by drip irrigation.In order to fully natural pond liquid is fed to fermentation bed 2, preferably, the shower nozzle 32 that the first drainage channel 3 comprises transfer pipeline 31 and is communicated with this transfer pipeline, points to the bed body of this fermentation bed 2 above the bed body that shower nozzle 32 is arranged on fermentation bed 2.Therefore by the pumping installations in transfer pipeline 31 or difference in height, natural pond liquid is pressurizeed, and then be sprayed onto in fermentation bed 2 by shower nozzle 32, to make the uniform contact of fermenting bed padding and natural pond liquid.More preferably, as shown in Figure 1, shower nozzle 32 is multiple and symmetry is arranged on the bed body both sides of fermentation bed 2.Such as, the bearing of trend interval of multiple shower nozzle 32 along fermentation bed 2 can be arranged, and one group of symmetry is arranged on a body both sides between two, can ensure the bedding and padding uniform contact of natural pond liquid and fermentation bed like this.
As depicted in figs. 1 and 2, due to the dystopy fermentation bed that employing of the present invention is separated with culture zone, the bed body of fermentation bed and bedding and padding of banking up can be designed more easily, can design more excellent stirring mode for fermentation bed 2 more easily, can more effectively make bedding and padding and natural pond liquid mix, and improve treatment effect and the efficiency of natural pond liquid.Wherein, can design and fermentation bed 2 is designed to multiple, particularly, fermentation bed 2 comprises the first fermentation bed 21 and the second fermentation bed 22, the passageway 23 for the walking of fermentation bed stirring equipment 7 is provided with between this first fermentation bed 21 and second fermentation bed 22, the length direction of this passageway 23 and the first fermentation bed 21 and the second fermentation bed 22 extends in the same way, and such stirring equipment 7 only need can carry out stirring to the fermentation bed 2 of its both sides along passageway 23 walking, and does not need to repeat walking.And more preferably, fermentation bed stirring equipment is excavator.Like this by its hydraulically powered bucket, the bedding and padding bottom fermentation bed 2 fully can be dug, bedding and padding fully can be contacted with natural pond liquid thus improve natural pond liquid treatment effect and efficiency.In other embodiments; fermentation bed arrangement as depicted in figs. 1 and 2 can carry out various distortion; be such as that a unit carries out repeated configuration with the first fermentation bed 21 and the second fermentation bed 22; for the quantity of fermentation bed and the distortion of specification; and other do not depart from the various distortion of the present invention's design, the kind of such as stirring equipment and turn over rake mode and all drop in protection scope of the present invention.
Further, fermentation bed 2 can produce diffusate in the process of dissolving to natural pond liquid and ferment, the complete fermentation of this diffusate bed 2 by fermentation can as plantation fertilizer, therefore in order to utilize natural pond liquid completely, preferably, natural pond provided by the invention liquid treating system also comprises diffusate collecting region 4 and the diffusate of fermentation bed 2 is drained into the second drainage channel 5 of diffusate collecting region 4.Therefore, the diffusate entered in diffusate collecting region 4 may be used for various application, such as, for the growth of the algae in fish pond of breeding fish, more effectively can ensure the utilization of natural pond liquid like this.For the ease of applying this diffusate, preferably, the pumping installations 41 pumped by diffusate is provided with in diffusate collecting region 4, such as submersible sewage pump.Therefore, diffusate can be pumped into the regions such as fish pond by this pumping installations 41 and carry out the various utilization such as breed fish, the distortion for the various Land use systems to diffusate all drops in protection scope of the present invention.
Wherein, drainage and the arrangement of the second drainage channel 5 have multiple, in a preferred embodiment of the invention, as depicted in figs. 1 and 2, second drainage channel 5 comprises the discharging tube 51 bottom the bed body being laid in each fermentation bed 2 along its length, on the tube wall of this discharging tube 51, compartment of terrain offers multiple inlet opening along its length, wherein multiple inlet opening not only can be arranged along the length direction interval of discharging tube 51, but also can arrange at the tube wall circumference interval of same lengthwise location along discharging tube 51, fully flow in discharging tube 51 so that the diffusate oozed out in fermentation bed 2 can be made.In addition, second drainage channel 5 also comprises the liquid header 52 be communicated with the outlet end of the discharging tube 51 of multiple fermentation bed 2, this liquid header 52 is communicated with diffusate collecting region 4, thus the diffusate entering discharging tube 51 can be collected in diffusate collecting pit 4 by being pooled to liquid header 52.
Discharging tube 51 is entered for the ease of diffusate, preferably, the bed body of fermentation bed 2 comprises bottom surface and is positioned at the side of these both sides, bottom surface, and wherein at least one side stretches out from inclined bottom surface, and discharging tube 51 is laid in the corner between bottom surface and this at least one side.Such diffusate laterally can be pooled to corner thus conveniently enter the discharging tube 51 being arranged in this turning.Wherein as shown in Figure 1, the bed body of fermentation bed 2 of the present invention has inverse taper cross section, and namely two sides all stretch out from inclined bottom surface, can arrange discharging tube 51 like this in Liang Ge corner.In addition, when only arranging discharging tube 51 a corner, the width bearing of trend of the bed body bottom surface of fermentation bed 2 can be set to arrange horizontal by angular slope, facilitates the diffusate in fermentation bed 2 all to flow to this discharging tube 51 like this.All should drop in protection scope of the present invention for this deformation design.
Wherein the drainage way of the second drainage channel 5 preferably adopts difference in height mode, i.e. length bearing of trend bottom the bed body of fermentation bed 2 and horizontal direction are angularly obliquely installed.Diffusate can be convenient to like this towards the flowing of low side side, so that collect.Particularly, liquid header 52 is arranged on the low side of discharging tube 51, can ensure that the diffusate in discharging tube 51 utilizes gravity to flow in liquid header 52 like this, thus enter in diffusate collecting pit 4.Except utilizing difference in height mode, aspirator can also be utilized in other embodiments to aspirate, as long as object of the present invention can be realized, this mode of texturing is all dropped in protection scope of the present invention.
Finally, because the fermentation bed 2 in the liquid treating system of natural pond provided by the invention adopts dystopy fermentation bed, therefore various design can be carried out to it.As shown in Figure 1 to Figure 3, in a preferred embodiment of the invention, in fermentation bed 2, ceiling 9 can be had by pillar 8 erection, and conveniently arrange rain, along pillar 8 row of being furnished with rain pipe, and the entrance of this row's rain pipe can be positioned at the bottom of ceiling 9, facilitate rainwater to enter row's rain pipe.In addition, pillar 8 can as installing the basis of above-mentioned shower nozzle 32, and ceiling also can as the wiring basis of the transfer pipeline 31 of layout first drainage channel 3.In addition, at the edge of ceiling 9, telescopic curtain can also be installed, pack up curtain in summer like this, put down the environmental temperature that curtain can ensure fermentation bed 2 winter.In other embodiments, other designs various can also being carried out to fermentation bed 2, all dropping in protection scope of the present invention for not departing from various distortion of the present invention.
In sum, the dystopy fermentation bed that utilizes of the present invention can realize pollutant " zero-emission " to the natural pond liquid treating system that natural pond liquid processes, and while natural pond liquid is dissolved, can cross the recycling realizing resource.It can the circulation approach of imitated natural ecosystem " Producer-consumer problem-analyst ", realizes material closed cycle and cascade utilization; Form industrial symbiosis network by " industrial chain " of setting up industrial system, realize with the management philosophy of " bedding and padding change fertilizer ", and the maximum utilization of the resource realizing agricultural organic waste, finally set up continuable economic system.Therefore the plant of cultivation natural pond provided by the invention liquid treating system and this natural pond liquid treating system of use has higher practicality and promotional value.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characteristic described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode, in order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible combination.
In addition, also can be combined between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.

Claims (10)

1. natural pond liquid treating system is used in a cultivation, it is characterized in that, this natural pond liquid treating system comprise liquid storage area, natural pond (1), fermentation bed (2) and by the natural pond liquid drainage in liquid storage area, described natural pond (1) to the first drainage channel (3) in described fermentation bed (2), and described fermentation bed (2) is separated setting with cultivation culture zone.
2. natural pond according to claim 1 liquid treating system, it is characterized in that, described natural pond liquid treating system also comprises diffusate collecting region (4) and the diffusate of described fermentation bed (2) is drained into second drainage channel (5) of described diffusate collecting region (4).
3. natural pond according to claim 2 liquid treating system, is characterized in that, is provided with the pumping installations (41) pumped by diffusate in described diffusate collecting region (4).
4. natural pond according to claim 1 liquid treating system, it is characterized in that, the shower nozzle (32) that described first drainage channel (3) comprises transfer pipeline (31) and is communicated with this transfer pipeline, points to the bed body of this fermentation bed (2) above the bed body that described shower nozzle (32) is arranged on described fermentation bed (2).
5. natural pond according to claim 4 liquid treating system, is characterized in that, described shower nozzle (32) is arranged on the bed body both sides of described fermentation bed (2) for multiple and symmetry.
6. natural pond according to claim 2 liquid treating system, it is characterized in that, described fermentation bed (2) is for multiple, described second drainage channel (5) comprises the discharging tube (51) bottom the bed body being laid in each fermentation bed (2) along its length, on the tube wall of this discharging tube (51), compartment of terrain offers multiple inlet opening along its length, described second drainage channel (5) also comprises the liquid header (52) be communicated with the outlet end of the described discharging tube (51) of multiple fermentation bed (2), this liquid header (52) is communicated with described diffusate collecting region (4).
7. natural pond according to claim 6 liquid treating system, it is characterized in that, the bed body of described fermentation bed (2) comprises bottom surface and is positioned at the side of these both sides, bottom surface, wherein at least one side stretches out from described inclined bottom surface, and described discharging tube (51) is laid in the corner between described bottom surface and at least one side described.
8. natural pond according to claim 1 liquid treating system, it is characterized in that, described fermentation bed (2) comprises the first fermentation bed (21) and the second fermentation bed (22), the passageway (23) of walking for fermentation bed stirring equipment (7) is provided with between this first fermentation bed (21) and second fermentation bed (22), this passageway (23) extends in the same way with the length direction of described first fermentation bed (21) and the second fermentation bed (22), preferably, described fermentation bed stirring equipment is excavator.
9. according to the natural pond liquid treating system in claim 1-8 described in any one, it is characterized in that, the bearing of trend bottom the bed body of described fermentation bed (2) and horizontal direction are angularly obliquely installed.
10. a plant, comprises cultivation culture zone, it is characterized in that, described plant also comprises according to the natural pond liquid treating system in claim 1-9 described in any one.
CN201410165586.7A 2014-04-23 2014-04-23 Cultivation biogas slurry treatment system and plant Expired - Fee Related CN105010152B (en)

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CN201410165586.7A CN105010152B (en) 2014-04-23 2014-04-23 Cultivation biogas slurry treatment system and plant

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CN201410165586.7A CN105010152B (en) 2014-04-23 2014-04-23 Cultivation biogas slurry treatment system and plant

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CN105010152B CN105010152B (en) 2017-08-25

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0723673A (en) * 1993-07-09 1995-01-27 Ijichi Kasei Kk Odorless poultry farming
CN1789213A (en) * 2005-06-09 2006-06-21 宁波德安城市生态技术集团有限公司 Kitchen refuse ecologic fermentation apparatus
CN101993182A (en) * 2010-10-16 2011-03-30 福建洛东生物技术有限公司 Livestock and poultry farm dung dirt biological fermentation treatment method and device
CN202953956U (en) * 2012-10-24 2013-05-29 广东温氏食品集团股份有限公司 Zero discharge fermentation bed outside hog house
CN203327680U (en) * 2013-06-04 2013-12-11 石河子大学 Hog-house water-saving deodorization sewage discharge system
CN104737927A (en) * 2013-12-27 2015-07-01 中国农业科学院农业环境与可持续发展研究所 Fermentation system for controlling cultivation pollution and farm

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0723673A (en) * 1993-07-09 1995-01-27 Ijichi Kasei Kk Odorless poultry farming
CN1789213A (en) * 2005-06-09 2006-06-21 宁波德安城市生态技术集团有限公司 Kitchen refuse ecologic fermentation apparatus
CN101993182A (en) * 2010-10-16 2011-03-30 福建洛东生物技术有限公司 Livestock and poultry farm dung dirt biological fermentation treatment method and device
CN202953956U (en) * 2012-10-24 2013-05-29 广东温氏食品集团股份有限公司 Zero discharge fermentation bed outside hog house
CN203327680U (en) * 2013-06-04 2013-12-11 石河子大学 Hog-house water-saving deodorization sewage discharge system
CN104737927A (en) * 2013-12-27 2015-07-01 中国农业科学院农业环境与可持续发展研究所 Fermentation system for controlling cultivation pollution and farm

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Granted publication date: 20170825