CN102249507B - Livestock and poultry muck treatment system and method based on membrane concentration technology - Google Patents
Livestock and poultry muck treatment system and method based on membrane concentration technology Download PDFInfo
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- CN102249507B CN102249507B CN2011100950566A CN201110095056A CN102249507B CN 102249507 B CN102249507 B CN 102249507B CN 2011100950566 A CN2011100950566 A CN 2011100950566A CN 201110095056 A CN201110095056 A CN 201110095056A CN 102249507 B CN102249507 B CN 102249507B
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Abstract
The invention discloses a livestock and poultry muck treatment system and method based on a membrane concentration technology. The system comprises a first-stage anaerobic fermentation reactor, a solid-liquid separation device, a membrane concentration device and a second-stage anaerobic fermentation reactor. According to the technical core of the treatment system, the membrane concentration technology is used for concentrating biogas slurry which is produced by the first-stage anaerobic fermentation reactor and then treated by the solid-liquid separation device, and then clean liquid and concentrated biogas slurry are separated, the clean liquid obtained after membrane concentration is subjected to aerobic ammonium removal and other subsequent treatments and then is used for the blending of the anaerobic fermentation raw materials in the first-stage anaerobic fermentation reactor or is directly discharged, and the concentrated biogas slurry is subjected to second-stage high-efficiency anaerobic fermentation to further generate biogas, thereby the energy utilization rate of the livestock and poultry muck is improved and the fermentation residues can be finally put into agricultural application. The method is simple in process, the production amount of the biogas slurry can be significantly reduced, the difficulty of agricultural application and the cost of intermediate transport, storage and other steps are lowered, and the purposes of efficient recycling and zero discharge of the livestock and poultry muck are achieved.
Description
Technical field
The present invention relates to a kind of energy recycling technology of livestock and poultry feces, relate in particular to a kind of employing based on the high efficient energy sources utilization of the livestock and poultry feces of membrane concentration technology and the system and method for zero emission, for the biogas engineering construction based on livestock and poultry feces of plant provides technical support.
Background technology
Livestock culture already is the important component part of China's Economy of agriculture and countryside, along with greatly developing of livestock culture industry, the environmental problem that livestock and poultry feces causes becomes increasingly conspicuous, and affects Economic development, jeopardize ecological safety, become one of social common concern and problem demanding prompt solution.Particularly intensive livestock and poultry breeding industry livestock and poultry feces quantity discharged large, concentrate, and generally do not have enough soils that it is dissolved around the plant so that plant husbandry disconnects with aquaculture, cause livestock and poultry feces surplus and polluting in certain area.
In recent years; country supports and promotes large-scale cultivation field biogas engineering based on anaerobic fermentation technology energetically; promote harmless treatment and the recovery energy of the dirt of cultivation excrement; not only can eliminate environmental pollution; produce clean energy biogas; the natural pond liquid and the natural pond slag that produce can also be produced organic fertilizer, adapt to the growth requirement of energy-saving and emission-reduction and energy reproducible utilization, meet the demand of breeding enterprise own and National Sustainable Development Strategies.Yet the problem of dissolving of a large amount of natural ponds liquid that produces in the biogas engineering becomes one of key factor of its development of restriction.
See also Fig. 1, in the prior art, biogas engineering generally includes following content for the treatment scheme of livestock and poultry feces: at first in anaerobic fermentation reactor livestock and poultry feces is carried out the fermentation raw material pre-treatment, the processing such as acidication and anaerobically fermenting, its output object comprises biogas and residues, biogas wherein is transported to and burns in the energy utilization device or the recycling such as generating, residues is sent to and carries out solid-liquid separation in the equipment for separating liquid from solid, the high part (natural pond slag) of isolated solids content after modification and allotment, supply with agricultural use as organic fertilizer, and isolated a large amount of liquid portion (natural pond liquid) also be a kind of organic manure resource, but because its generation is large, the fertilizer efficiency index is lower, general periphery does not have enough soils of dissolving, and the long distance transportation cost is higher; Secondly, there is again obvious seasonality in natural pond liquid agricultural use, needs enough large storage space, causes a construction cost higher, and then cost is huge directly to process rear qualified discharge.There is serious threat in " directly utilizing on the spot " that present natural pond liquid often can not obtain expecting to surrounding enviroment.So the higher value application of natural pond liquid in the mass-producing biogas engineering (being the high added value utilization of natural pond liquid) technology has become a vital technical bottleneck problem, is a gordian technique difficult problem of needing solution badly.
Summary of the invention
For overcoming the shortcoming of prior art, the present invention proposes a kind of livestock and poultry feces treatment system and method based on the membrane concentration technology, it utilizes the membrane concentration technology that a large amount of natural ponds liquid of output in the biogas engineering is concentrated, separates and further fermentative processing, to reduce the quantum of output of natural pond liquid, solve the difficult problem that natural pond liquid faces at aspects such as later stage storage, transportation and recyclings.
For achieving the above object, the invention provides a kind of livestock and poultry feces treatment system based on the membrane concentration technology, comprise: the one-level anaerobic fermentation reactor, the fermentation raw material that comprises livestock and poultry feces is admitted to and wherein carries out the anaerobically fermenting processing, its output object comprises biogas and fermentation resistates, and wherein the biogas with institute's output exports this system outside to by gas pipe line; Equipment for separating liquid from solid, comprise solid-liquid separating machine, described fermentation resistates sent in this equipment for separating liquid from solid by wherein solid-liquid separating machine is set carry out solid-liquid separation and process, isolate the natural pond slag and the main natural pond liquid that is comprised of liquid portion that mainly are comprised of solid part, it is outside wherein to export described natural pond slag to this system by e Foerderanlage; Film condensing device is sent into described natural pond liquid in this film condensing device and to be concentrated and separating treatment, isolates clear liquid and concentrated natural pond liquid, wherein with described clear liquid by transport pipe output recycling or after subsequent processes qualified discharge; And B grade anaerobic fermentation reactor, described concentrated natural pond liquid is admitted to and carries out the processing of secondary anaerobically fermenting in this B grade anaerobic fermentation reactor, its output object comprises natural pond liquid behind biogas and the second order fermentation, wherein the biogas with output exports this system outside to by gas pipe line, and exports natural pond liquid behind the second order fermentation of institute's output to this system outside for agricultural application by e Foerderanlage.
According to embodiments of the invention, this film condensing device comprises: natural pond liquid pretreatment unit comprises: sandfiltration pot, and the described natural pond liquid after the process solid-liquid separation is sent in this sandfiltration pot by connecting tube and is filtered, with the solids of filtering big particle; Acidifying regulating tank, the natural pond liquid after sand filtration are admitted in this acidifying regulating tank, and mix from the acid solution in the acid bath, and the liquid acidifying of described natural pond is adjusted to predetermined acidity; And core formula strainer, the natural pond liquid after acidifying is regulated is admitted to this core formula strainer and carries out micro-filtration, further the solids of filtering molecule; And this film condensing device also comprises: the reverse osmosis membrane post, be connected to the core formula strainer of this natural pond liquid pretreatment unit by transport pipe and high-pressure pump, pump into from the natural pond liquid of this core formula strainer bottom from this reverse osmosis membrane post, rising and filter and shunt under pressure, thus isolate clear liquid and concentrated natural pond liquid; Clean solution tank is transported in this clean solution tank through the isolated clear liquid of this reverse osmosis membrane post; And concentrated natural pond liquid pool, be transported in this concentrated natural pond liquid pool through this isolated concentrated natural pond of reverse osmosis membrane post liquid.
According to embodiments of the invention, this reverse osmosis membrane post comprises: shell, made by glass reinforced plastic; Multilayer Film, every tunic sheet is made by resistant to pollution reverse osmosis membrane; And a plurality of flow guiding discs, made by high-strength material, per two formation of described a plurality of flow guiding discs are a pair of, every pair of positive and negative interlocking of flow guiding disc, described a plurality of diaphragms are clipped in wherein, stacking many to flow guiding disc from bottom to top in this shell, described natural pond liquid is flowed through described many to the Multilayer Film in the flow guiding disc from bottom to top successively, the liquid that goes out by described membrane filtration forms clear liquid, the liquid that is trapped forms concentrated natural pond liquid, and described clear liquid flows out this reverse osmosis membrane post via different runners respectively from described concentrated natural pond liquid.
According to embodiments of the invention, this B grade anaerobic fermentation reactor is one of up-flow anaerobic sludge blanket, expanded granular sludge bed or anaerobic internal circulation reactor, described concentrated natural pond liquid from this film condensing device carries out the processing of secondary anaerobically fermenting therein, removes the organism in the liquid of described concentrated natural pond in output biogas.
According to embodiments of the invention, directly be back in this one-level anaerobic fermentation reactor from the clear liquid of this film condensing device the fermentation raw material that comprises livestock and poultry feces is allocated.
According to embodiments of the invention, clear liquid from this film condensing device carries out aerobic deamination processing in being arranged at the clear liquid after-treatment device of this system outside, clear water qualified discharge after will processing, clear water is back in this one-level anaerobic fermentation reactor the fermentation raw material that comprises livestock and poultry feces is allocated after maybe will processing.
According to embodiments of the invention, this one-level anaerobic fermentation reactor is flow lifting type solid anaerobic reactor or continuous-stirring reactor, and described anaerobically fermenting processing comprises carries out pre-treatment, acidication and anaerobically fermenting to described fermentation raw material.
According to embodiments of the invention, in being arranged at the agricultural application system of this system outside, carry out modification from the natural pond slag of this equipment for separating liquid from solid, thereby as organic fertilizer for agricultural application; And in this agricultural application system, carry out nutrition deployment from the concentrated natural pond liquid of this second anaerobic fermentation reactor and process, thereby as organic fertilizer for agricultural application.
For achieving the above object, the invention provides a kind of livestock and poultry feces treatment process based on the membrane concentration technology, it adopts aforesaid livestock and poultry feces treatment system that the fermentation raw material that comprises livestock and poultry feces is processed, and the method may further comprise the steps:
The fermentation raw material that S1) will comprise livestock and poultry feces is sent into and is carried out anaerobically fermenting in the one-level anaerobic fermentation reactor and process, output biogas and fermentation resistates, wherein the biogas with institute's output is used by the energy utilization device that gas pipe line exports this system outside to;
S2) described fermentation resistates is sent into carried out solid-liquid separation in the equipment for separating liquid from solid and process, isolate the natural pond slag and the main natural pond liquid that is formed by liquid portion that are mainly formed by solid part, wherein described natural pond slag is undertaken supplying agricultural application after the modification by the agricultural application system that e Foerderanlage exports this system outside to;
S3) described natural pond liquid is sent in this film condensing device concentrated and separating treatment, isolate clear liquid and concentrated natural pond liquid; And
S4) described concentrated natural pond liquid is sent into carried out again anaerobically fermenting in the B grade anaerobic fermentation reactor and process, natural pond liquid behind output biogas and the second order fermentation, wherein the biogas of institute's output is exported by gas pipe line, and natural pond liquid behind the second order fermentation of institute's output is undertaken supplying agricultural application behind the nutrition deployment by the agricultural application system that e Foerderanlage exports this system outside to.
According to embodiments of the invention, in step S3, from the natural pond liquid of one-level anaerobic fermentation reactor at first in the liquid pretreatment unit of natural pond, carry out successively sand filtration, acid is regulated and micro-filtration is processed, then in the reverse osmosis membrane post, concentrate and separate.
According to embodiments of the invention, after step S4, directly be back in this one-level anaerobic fermentation reactor from the clear liquid of film condensing device the fermentation raw material that comprises livestock and poultry feces is allocated.
According to embodiments of the invention, after step S4, clear liquid from film condensing device carries out aerobic deamination processing in the clear liquid after-treatment device of this system outside, clear water qualified discharge after will processing, clear water is back in this one-level anaerobic fermentation reactor the fermentation raw material that comprises livestock and poultry feces is allocated after maybe will processing.
According to embodiments of the invention, should be further comprising the steps of based on the livestock and poultry feces treatment process of membrane concentration technology:
After step S2, in being arranged at the agricultural application system of this system outside, carry out modification from the natural pond slag of this equipment for separating liquid from solid, thereby as organic fertilizer for agricultural application; And after step S4, in this agricultural application system, carry out nutrition deployment from the concentrated natural pond liquid of this second anaerobic fermentation reactor and process, thereby as organic fertilizer for agricultural application.
The present invention utilizes the membrane concentration technology that natural pond liquid is concentrated, nutritive substance and the organism held back in the liquid of natural pond by the membrane concentration technology concentrate natural pond liquid to form, isolate simultaneously clear liquid, wherein, described concentrated natural pond liquid is carried out fermentative processing through high efficiency anaerobic reactor again, further produce biogas and remove simultaneously the organism that concentrates in the liquid of natural pond, so that can be directly agricultural after the nutrition allotment through the natural pond liquid after the fermentative processing again, and, isolated clear liquid also can realize the recycle of water resources after processing through aerobic deamination.
Overall technology of the present invention can significantly reduce the quantum of output of natural pond liquid, reduced the later stage carrying cost of natural pond liquid, go back simultaneously so that the biogas production capacity of biogas engineering maximizes, and realized the recycle of water resources and the direct utilization on agricultural of natural pond liquid, have significant comprehensive benefit.
Description of drawings
Fig. 1 is the skeleton diagram of the livestock and poultry feces treatment system based on the membrane concentration technology of the present invention.
Fig. 2 is the schema of the livestock and poultry feces treatment process based on the membrane concentration technology of the present invention.
Fig. 3 is the structural representation of membrane concentration tripping device according to an embodiment of the invention.
Fig. 4 is the local structure synoptic diagram of the reverse osmosis membrane post of membrane concentration tripping device shown in Figure 3.
Wherein, description of reference numerals is as follows:
1-one-level anaerobic fermentation reactor
The 2-equipment for separating liquid from solid
The 3-film condensing device
31-natural pond liquid pretreatment unit
The 311-sandfiltration pot
312-acidifying regulating tank
313-core formula strainer
32-reverse osmosis membrane post
The 321-shell
The 322-diaphragm
The 323-flow guiding disc
The 33-clean solution tank
The concentrated natural pond of 34-liquid pool
4-B grade anaerobic fermentation reactor
5-clear liquid after-treatment device
6-agricultural application system
Embodiment
The present invention is described further below in conjunction with accompanying drawing and example.
As shown in Figure 1, it is the skeleton diagram of the livestock and poultry feces treatment system based on the membrane concentration technology of the present invention.According to one embodiment of present invention, the livestock and poultry feces treatment system based on the membrane concentration technology comprises one-level anaerobic fermentation reactor 1, equipment for separating liquid from solid 2, film condensing device 3 and the B grade anaerobic fermentation reactor 4 that is interconnected by transport pipe.
Wherein, the fermentation raw material that comprises livestock and poultry feces is admitted in the one-level anaerobic fermentation reactor 1, with be present in the one-level anaerobic fermentation reactor 1 anerobe this carry out anaerobically fermenting and process, its output object comprises biogas and fermentation resistates, it is outside that the biogas of institute's output is transported to this system by gas pipe line, burns or generating etc. for methane utilization device.
In equipment for separating liquid from solid 2, comprise solid-liquid separating machine, described fermentation resistates sent in this equipment for separating liquid from solid 2 by wherein solid-liquid separating machine is set carry out solid-liquid separation and process, isolate the natural pond slag and the main natural pond liquid that is formed by liquid portion that are mainly formed by solid part, it is outside to export described natural pond slag to this system by e Foerderanlage, can carry out the agricultural application such as field irrigation for agricultural application system 6 after overnutrition and moisture allotment.
The natural pond liquid of output in the equipment for separating liquid from solid 2 is sent in the film condensing device 3 and concentrate and separating treatment, isolate clear liquid and concentrated natural pond liquid, wherein described clear liquid is recycled or qualified discharge after subsequent processes by transport pipe output.
Be admitted to from the concentrated natural pond liquid of film condensing device 3 and carry out the secondary anaerobically fermenting in the B grade anaerobic fermentation reactor 4 and process, its output object comprises natural pond liquid behind biogas and the second order fermentation, wherein the biogas with output exports this system outside to by gas pipe line, and it is outside to export natural pond liquid behind the second order fermentation of institute's output to this system by e Foerderanlage, carries out the agricultural application such as field irrigation for agricultural application system 6.
Fig. 3 illustrates the structural representation of membrane concentration tripping device 3 according to an embodiment of the invention, and its concrete structure is as follows:
Film condensing device 3 comprises natural pond liquid pretreatment unit 31, reverse osmosis membrane post 32, clean solution tank 33 and the concentrated natural pond liquid pool 34 that is interconnected by transport pipe.
Wherein, natural pond liquid pretreatment unit 31 comprises: sandfiltration pot 311, and the described natural pond liquid after the process solid-liquid separation is sent in this sandfiltration pot 311 by connecting tube and is filtered, with the solids of filtering big particle; Acidifying regulating tank 312, the natural pond liquid after sand filtration are admitted in this acidifying regulating tank 312, and mix from the acid solution in the acid bath, and the liquid acidifying of described natural pond is adjusted to predetermined acidity; And core formula strainer 313, the natural pond liquid after acidifying is regulated is admitted to this core formula strainer 313 and carries out micro-filtration, further the solids of filtering molecule.
In reverse osmosis membrane post 32, be connected to the core formula strainer 313 of this natural pond liquid pretreatment unit 31 by transport pipe and high-pressure pump, pump into from the natural pond liquid of this core formula strainer 313 bottom from this reverse osmosis membrane post 32, rising and filter and shunt under pressure, thus isolate clear liquid and concentrated natural pond liquid.
Be transported in this clean solution tank 33 through these reverse osmosis membrane post 32 isolated clear liquids, and be transported in this concentrated natural pond liquid pool 34 through these reverse osmosis membrane post 32 isolated concentrated natural pond liquid.
Fig. 4 is the local structure synoptic diagram (Multilayer Film 322 that a pair of flow guiding disc 323 only is shown and wherein clips) of the reverse osmosis membrane post of membrane concentration tripping device shown in Figure 3.As shown in Figure 4, reverse osmosis membrane post 32 of the present invention can adopt dish tubular membrane column assembly to realize that it specifically comprises: shell 321, made by glass reinforced plastic; Multilayer Film 322, every tunic sheet 323 is made by resistant to pollution reverse osmosis membrane; And a plurality of flow guiding discs 323, made by high-strength materials such as plastics or resins, per two formation of described a plurality of flow guiding disc 323 are a pair of, every pair of flow guiding disc 323 positive and negative interlocking, described a plurality of diaphragms 322 are clipped in wherein, stacking many to flow guiding disc 323 from bottom to top in this shell 321, described natural pond liquid is flowed through described many to the Multilayer Film 322 in the flow guiding disc 323 from bottom to top successively, the liquid that filters out by described diaphragm 322 forms clear liquid, the liquid that is trapped forms concentrated natural pond liquid, and described clear liquid flows out this reverse osmosis membrane post 32 via different runners respectively from described concentrated natural pond liquid.
Dish tubular membrane column assembly is usually used to carry out the processing of percolate.It has open wide runner and unique band salient point flow guiding disc, feed liquid forms turbulence state in assembly, dish tubular membrane column assembly reduced to the full extent the generation of film surface scale, pollution and concentration polarization phenomenon, even so that also can embody its superior performance under the working pressure of high pressure.In addition, dish tubular membrane column assembly can also effectively be avoided the fouling of film, alleviates the film pollution level, makes the life of reverse osmosis membrane, and its special construction and Hydraulic design make membrane module be easy to clean, and flux recovery is very good after cleaning, thereby has prolonged the diaphragm life-span.
The present invention is applied to this dish tubular membrane column assembly the concentrated of natural pond liquid and separates, and has obtained good treatment effect and very high processing efficiency.
According to one embodiment of present invention, one-level anaerobic fermentation reactor 1 wherein is flow lifting type solid anaerobic reactor or continuous-stirring reactor, and these two kinds of reactors are generally used for the anaerobic fermentation process of high solid concentration material in the prior art.Described anaerobically fermenting process refer to solid substances liquefaction and wherein organism be converted into the process of biogas.The product of one-level anaerobically fermenting is natural pond liquid, still contain a certain amount of organism in the liquid of natural pond, but relative concentration is lower, processes if natural pond liquid is proceeded anaerobically fermenting, then can cause reactor volume to be multiplied, and reaction efficiency reduces greatly.
B grade anaerobic fermentation reactor 4 is the efficient anaerobic reactor such as up-flow anaerobic sludge blanket, expanded granular sludge bed or anaerobic internal circulation reactor, described concentrated natural pond liquid from this film condensing device 3 carries out the processing of secondary anaerobically fermenting therein, removes the organism in the liquid of described concentrated natural pond in output biogas.These reactors are usually used to carry out sewage disposal in the prior art, and compare aforementioned flow lifting type solid anaerobic reactor or continuous-stirring reactor have higher reaction efficiency.But because it requires the solids concn for the treatment of sewage can not be too high, the anaerobically fermenting that therefore can not be used to carry out livestock and poultry feces is processed, but is suitable for the concentrated natural pond liquid from film condensing device 3 of the present invention is processed.
Therefore, the present invention adopts the membrane concentration technology that the natural pond liquid that contains large quantity of moisture from equipment for separating liquid from solid 2 is concentrated, be further processed so that concentrated natural pond liquid enters the B grade anaerobic fermentation reactor 4 that usually only is used for sewage disposal, thereby realized best treatment effect and processing efficiency.And no matter be again to enter one-level anaerobic fermentation reactor 1 or directly B grade anaerobic fermentation reactor 4 is processed without the natural pond liquid of membrane concentration, its effect is all not satisfactory.
According to one embodiment of present invention, can directly be back in this one-level anaerobic fermentation reactor 1 from the clear liquid of this film condensing device 3 fermentation raw material that comprises livestock and poultry feces is allocated (namely diluting).
Perhaps, clear liquid from this film condensing device 3 also can carry out aerobic deamination processing in being arranged at the clear liquid after-treatment device 5 of this system outside, clear water qualified discharge after will processing, clear water is back in this one-level anaerobic fermentation reactor 1 fermentation raw material that comprises livestock and poultry feces is allocated after maybe will processing.
Natural pond slag from this equipment for separating liquid from solid 2 can carry out modification in being arranged at the agricultural application system 6 of this system outside, thereby supplies agricultural application as organic fertilizer; And
Concentrated natural pond liquid from this second anaerobic fermentation reactor 4 can carry out the nutrition deployment processing in agricultural application system 6, thereby supplies agricultural application as organic fertilizer.
Here indication agricultural application system 6 is more wide in range sayings, and it can be a cover agricultural facility, also can be diverse agricultural facility, can be according to the different of its application and application scenario and specific configuration.
Below in conjunction with Fig. 2 the livestock and poultry feces treatment process based on the membrane concentration technology of the present invention is described.
When adopting aforesaid livestock and poultry feces treatment system that the fermentation raw material that comprises livestock and poultry feces is processed, its treatment process may further comprise the steps:
The fermentation raw material that S1 will comprise livestock and poultry feces is sent into and is carried out anaerobically fermenting in the one-level anaerobic fermentation reactor 1 and process, output biogas and fermentation resistates, and wherein the biogas with institute's output is used by the energy utilization device that gas pipe line exports this system outside to;
S2 sends into described fermentation resistates and carries out the solid-liquid separation processing in the equipment for separating liquid from solid 2, isolate the natural pond slag and the main natural pond liquid that is formed by liquid portion that are mainly formed by solid part, wherein described natural pond slag is undertaken supplying agricultural application after the modification by the agricultural application system 6 that e Foerderanlage exports this system outside to;
S3 sends into described natural pond liquid in this film condensing device 3 and concentrates and separating treatment, isolates clear liquid and concentrated natural pond liquid; And
S4 sends into described concentrated natural pond liquid and carries out again the anaerobically fermenting processing in the B grade anaerobic fermentation reactor 4, natural pond liquid behind output biogas and the second order fermentation, wherein the biogas of institute's output is exported by gas pipe line, and natural pond liquid behind the second order fermentation of institute's output is undertaken supplying agricultural application behind the nutrition deployment by the agricultural application system 6 that e Foerderanlage exports this system outside to.
Wherein, in step S3, from the natural pond liquid of one-level anaerobic fermentation reactor 1 at first in natural pond liquid pretreatment unit 31, carry out successively sand filtration, acid is regulated and micro-filtration is processed, then in reverse osmosis membrane post 32, concentrate and separate.
After step S4, directly be back in this one-level anaerobic fermentation reactor 1 from the clear liquid of film condensing device 3 fermentation raw material that comprises livestock and poultry feces is allocated.
After step S4, clear liquid from film condensing device 3 carries out aerobic deamination processing in the clear liquid after-treatment device 5 of this system outside, clear water qualified discharge after will processing, clear water is back in this one-level anaerobic fermentation reactor 1 fermentation raw material that comprises livestock and poultry feces is allocated after maybe will processing.
Livestock and poultry feces treatment process based on the membrane concentration technology of the present invention is further comprising the steps of:
After step S2, in being arranged at the agricultural application system 6 of this system outside, carry out modification from the natural pond slag of this equipment for separating liquid from solid 2, thereby as organic fertilizer for agricultural application; And
After step S4, in this agricultural application system 6, carry out nutrition deployment from the concentrated natural pond liquid of this second anaerobic fermentation reactor 4 and process, thereby as organic fertilizer for agricultural application.
The present invention utilizes the membrane concentration technology that natural pond liquid is concentrated, nutritive substance and the organism held back in the liquid of natural pond by the membrane concentration technology concentrate natural pond liquid to form, isolate simultaneously clear liquid, wherein, described concentrated natural pond liquid is carried out fermentative processing through efficient B grade anaerobic fermentation reactor again, further produce biogas and remove simultaneously the organism that concentrates in the liquid of natural pond, so that can be directly agricultural after the nutrition allotment through the natural pond liquid after the fermentative processing again, and, isolated clear liquid also can realize the recycle of water resources after processing through aerobic deamination.
Overall technology of the present invention can significantly reduce the quantum of output of natural pond liquid, reduced the later stage carrying cost of the huge natural pond liquid of water content, simultaneously also so that the maximization of the biogas production capacity of biogas engineering, and realized the recycle of water resources and the direct utilization on agricultural of natural pond liquid, have significant comprehensive benefit.
The above; only for the better embodiment of the present invention, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.
Claims (13)
1. livestock and poultry feces treatment system based on the membrane concentration technology comprises:
One-level anaerobic fermentation reactor (1), the fermentation raw material that comprises livestock and poultry feces are admitted to and wherein carry out the anaerobically fermenting processing, and its output object comprises biogas and fermentation resistates, and wherein the biogas with institute's output exports this system outside to by gas pipe line;
Equipment for separating liquid from solid (2), comprise solid-liquid separating machine, described fermentation resistates sent in this equipment for separating liquid from solid (2) by wherein solid-liquid separating machine is set carry out solid-liquid separation and process, isolate the natural pond slag and the main natural pond liquid that is comprised of liquid portion that mainly are comprised of solid part, it is outside wherein to export described natural pond slag to this system by e Foerderanlage;
Film condensing device (3) is sent into described natural pond liquid in this film condensing device (3) and to be concentrated and separating treatment, isolates clear liquid and concentrated natural pond liquid, wherein with described clear liquid by transport pipe output recycling or after subsequent processes qualified discharge; And
B grade anaerobic fermentation reactor (4), described concentrated natural pond liquid is admitted to and carries out the processing of secondary anaerobically fermenting in this B grade anaerobic fermentation reactor (4), its output object comprises natural pond liquid behind biogas and the second order fermentation, wherein the biogas with output exports this system outside to by gas pipe line, and exports the natural pond liquid of institute's output to this system outside for agricultural application by e Foerderanlage.
2. the livestock and poultry feces treatment system based on the membrane concentration technology according to claim 1, wherein this film condensing device (3) comprising:
Natural pond liquid pretreatment unit (31) comprising:
Sandfiltration pot (311), the described natural pond liquid after the process solid-liquid separation is sent in this sandfiltration pot (311) by connecting tube and is filtered, with the solids of filtering big particle;
Acidifying regulating tank (312), the natural pond liquid after sand filtration are admitted in this acidifying regulating tank (312), and mix from the acid solution in the acid bath, and the liquid acidifying of described natural pond is adjusted to predetermined acidity; And
Core formula strainer (313), the natural pond liquid after acidifying is regulated is admitted to this core formula strainer (313) and carries out micro-filtration, further the solids of filtering molecule; And
Reverse osmosis membrane post (32), be connected to the core formula strainer (313) of this natural pond liquid pretreatment unit (31) by transport pipe and high-pressure pump, pump into from the natural pond liquid of this core formula strainer (313) bottom from this reverse osmosis membrane post (32), rise under pressure and filter and shunt, thereby isolate clear liquid and concentrated natural pond liquid;
Clean solution tank (33) is transported in this clean solution tank (33) through the isolated clear liquid of this reverse osmosis membrane post (32); And
Concentrated natural pond liquid pool (34) is transported in this concentrated natural pond liquid pool (34) through this isolated concentrated natural pond of reverse osmosis membrane post (32) liquid.
3. the livestock and poultry feces treatment system based on the membrane concentration technology according to claim 2, wherein this reverse osmosis membrane post (32) comprising:
Shell (321) is made by glass reinforced plastic;
Multilayer Film (322), every tunic sheet (322) is made by resistant to pollution reverse osmosis membrane; And
A plurality of flow guiding discs (323), made by high-strength material, per two formation of described a plurality of flow guiding disc (323) are a pair of, positive and negative the interlocking of every pair of flow guiding disc (323), described a plurality of diaphragms (322) are clipped in wherein, stacking many to flow guiding disc (323) from bottom to top in this shell (321), described natural pond liquid is flowed through described many to the Multilayer Film (322) in the flow guiding disc (323) from bottom to top successively, the liquid that filters out by described diaphragm (322) forms clear liquid, the liquid that is trapped forms concentrated natural pond liquid, and described clear liquid flows out this reverse osmosis membrane post (32) via different runners respectively from described concentrated natural pond liquid.
4. the livestock and poultry feces treatment system based on the membrane concentration technology according to claim 1 and 2, wherein this B grade anaerobic fermentation reactor (4) is one of up-flow anaerobic sludge blanket, expanded granular sludge bed or anaerobic internal circulation reactor, described concentrated natural pond liquid from this film condensing device (3) carries out the processing of secondary anaerobically fermenting therein, removes the organism in the liquid of described concentrated natural pond in output biogas.
5. the livestock and poultry feces treatment system based on the membrane concentration technology according to claim 1 and 2, wherein, directly be back in this one-level anaerobic fermentation reactor (1) from the clear liquid of this film condensing device (3) fermentation raw material that comprises livestock and poultry feces is allocated.
6. the livestock and poultry feces treatment system based on the membrane concentration technology according to claim 1 and 2, wherein, clear liquid from this film condensing device (3) carries out aerobic deamination processing in being arranged at the clear liquid after-treatment device (5) of this system outside, clear water qualified discharge after will processing, clear water is back in this one-level anaerobic fermentation reactor (1) fermentation raw material that comprises livestock and poultry feces is allocated after maybe will processing.
7. the livestock and poultry feces treatment system based on the membrane concentration technology according to claim 1 and 2, wherein this one-level anaerobic fermentation reactor (1) is flow lifting type solid anaerobic reactor or continuous-stirring reactor, and described anaerobically fermenting processing comprises carries out pre-treatment, acidication and anaerobically fermenting to described fermentation raw material.
8. the livestock and poultry feces treatment system based on the membrane concentration technology according to claim 1 and 2, wherein, natural pond slag from this equipment for separating liquid from solid (2) carries out modification in being arranged at the agricultural application system (6) of this system outside, thereby supplies agricultural application as organic fertilizer; And
Concentrated natural pond liquid from this second anaerobic fermentation reactor (4) carries out the nutrition deployment processing in this agricultural application system (6), thereby supplies agricultural application as organic fertilizer.
9. livestock and poultry feces treatment process based on the membrane concentration technology, it adopts such as the described livestock and poultry feces treatment system of any one in the claim 1 to 8 fermentation raw material that comprises livestock and poultry feces is processed, and the method may further comprise the steps:
The fermentation raw material that S1) will comprise livestock and poultry feces is sent into and is carried out anaerobically fermenting in the one-level anaerobic fermentation reactor (1) and process, output biogas and fermentation resistates, wherein the biogas with institute's output is used by the energy utilization device that gas pipe line exports this system outside to;
S2) described fermentation resistates is sent into carried out solid-liquid separation in the equipment for separating liquid from solid (2) and process, isolate the natural pond slag and the main natural pond liquid that is formed by liquid portion that are mainly formed by solid part, wherein described natural pond slag is undertaken supplying agricultural application after the modification by the agricultural application system (6) that e Foerderanlage exports this system outside to;
S3) described natural pond liquid is sent in this film condensing device (3) concentrated and separating treatment, isolate clear liquid and concentrated natural pond liquid; And
S4) described concentrated natural pond liquid is sent into carried out again anaerobically fermenting in the B grade anaerobic fermentation reactor (4) and process, output biogas and natural pond liquid, wherein the biogas of institute's output is exported by gas pipe line, and the natural pond liquid of institute's output is undertaken supplying agricultural application behind the nutrition deployment by the agricultural application system (6) that e Foerderanlage exports this system outside to.
10. the livestock and poultry feces treatment process based on the membrane concentration technology according to claim 9, in step S3, from the natural pond liquid of one-level anaerobic fermentation reactor (1) at first in natural pond liquid pretreatment unit (31), carry out successively sand filtration, acid is regulated and micro-filtration is processed, then in reverse osmosis membrane post (32), concentrate and separate.
11. the livestock and poultry feces treatment process based on the membrane concentration technology according to claim 9, after step S4, directly be back in this one-level anaerobic fermentation reactor (1) from the clear liquid of film condensing device (3) fermentation raw material that comprises livestock and poultry feces is allocated.
12. the livestock and poultry feces treatment process based on the membrane concentration technology according to claim 9, after step S4, clear liquid from film condensing device (3) carries out aerobic deamination processing in the clear liquid after-treatment device (5) of this system outside, clear water qualified discharge after will processing, clear water is back in this one-level anaerobic fermentation reactor (1) fermentation raw material that comprises livestock and poultry feces is allocated after maybe will processing.
13. the livestock and poultry feces treatment process based on the membrane concentration technology according to claim 9 is further comprising the steps of:
After step S2, in being arranged at the agricultural application system (6) of this system outside, carry out modification from the natural pond slag of this equipment for separating liquid from solid (2), thereby as organic fertilizer for agricultural application; And
After step S4, in this agricultural application system (6), carry out nutrition deployment from the natural pond liquid of this second anaerobic fermentation reactor (4) and process, thereby as organic fertilizer for agricultural application.
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| CN111362544A (en) * | 2020-04-02 | 2020-07-03 | 中国农业大学 | Method for producing liquid organic fertilizer and clean reuse water of farm from biogas slurry |
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| CN101402533A (en) * | 2008-10-30 | 2009-04-08 | 浙江林学院 | Insecticide fertilizer for tomato production based on biogas slurry concentrated liquor and process for producing biogas slurry concentrated liquor |
| US20100193416A1 (en) * | 2009-01-30 | 2010-08-05 | Barbaro Ronald D | Non-biological removal and recovery of nutrients from waste |
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