CN101434450B - Anaerobic digestion processing method and apparatus in biogas production process - Google Patents
Anaerobic digestion processing method and apparatus in biogas production process Download PDFInfo
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention relates to a process and a device for methane anaerobic digestion treatment, which consists of two parts: anaerobic fermentation gas production, and slag discharge, solid-liquid separation and collection thereof; wherein, the anaerobic fermentation gas production process comprises feed manner, process arrangement, the closure reflux of strains, prolonged fermentation gas production time of organic solids, and the like; the processes of the slag discharge, solid-liquid separation and collection thereof comprises low point fall slag discharge, hydraulic agitation slag discharge, strengthened solid-liquid separation, circulation sedimentation separation, organic filtering material filtering and separation, filtering and draining combined separation, and the like; and the device comprises a honeycomb type anaerobic pool, a circular regulation pool and a circular sedimentation pool thereof. The process and the device have an unique feed manner, an effective slag discharge way, full and strengthened solid-liquid separation, and organic solid recycling with high proportion, particularly, fermented gas production materials after the strengthened solid-liquid separation can be guaranteed, meanwhile, organic material recycling with high proportion and water discharge with low concentration can be realized. The process and the device can effectively combine new energy development, organic fertilizer production and the treatment for environment protection; besides, processes are simple and practical, thus being suitable for popularization.
Description
Technical field
The present invention relates to a kind of anaerobic digestion handling method, particularly a kind of anaerobic ferment devices and anaerobic digestion handling method and equipment thereof that is used for biogas production fertilizer environmental protection connection effect.
Background technology
The research of present big-and-middle-sized biogas engineering anaerobic digestion process all is heat subject in the world and China, the anaerobic digestion process technology in the China and the world is all very ripe at present, especially fundamental technology research, but aspect applicability and comprehensive process research not as good as the former, now common anaerobic digestion process is that two kinds on environment-friendly type and energy type arranged, environment-friendly type is that organic sewage is carried out strict pre-treatment, as aquaculture wastewater is done rare separation earlier, rare part is carried out anaerobic digestion, the part of doing is directly made fertilizer, feed liquid is carried out aerobic aeration and oxidation pond again and is handled the back discharging through after the anaerobic digestion.Present this mode of domestic most employing, significant disadvantages is that gas production rate is few, does not have benefit substantially and can say that enterprise does not have enthusiasm.Energy type is that raw material all carries out anaerobic digestion, as brewery's biogas engineering, carries out solid-liquid separation in the time of anaerobic digestion, and its natural pond liquid part is discharged after aerobic treatment.This mode aerogenesis is better, but be simple solid-liquid separation, the aerobic treatment difficulty is bigger, often be difficult to qualified discharge, deslagging is the main difficult problem of this mode, up to the present do not solve well, because the deslagging problem does not have fine solution, solid-liquid separation just can not reach reinforcement when technological design, do not strengthen solid-liquid separation and then directly influence final aerogenesis and water outlet effect, the comprehensive benefit of this technology is also bad in addition, collects the organic suspension thing in natural pond slag and the natural pond liquid to greatest extent and uses it for the production of fertilizer, and this is beyond example still at home.Since in the later subsequent disposal of anaerobic digestion still none simple effective method remove organic suspension thing in the liquid effluent, and treatment effect is had a greatly reduced quality.External big-and-middle-sized biogas engineering is mainly based on energy type, and its technology is often also mainly considered the aerogenesis effect.2005.06.29 Patent Office of the People's Republic of China discloses the patent of invention (notification number: CN1631817), be mainly used in sanitary sewage disposal, livestock breeding wastewater processing and Industrial Wastewater Treatment of a kind of " integral anaerobic-wetland wastewater treatment equipment and method " by name.Comprise buried system for anaerobic treatment and position artificial wet land treating system thereon, key step is: enter anaerobic digester through the waste water behind the grid by the water distributing pore between water inlet; Waste water enters anaerobic filter again, and elastic filler or wadding are set in the anaerobic filter; Waste water enters facultative filter tank then; The waste water that handle in the facultative filter tank of process enters artificial swamp by the overflow weir above the facultative filter tank and handles; The biogas that produces is stored in the top of anaerobic digester and anaerobic filter, and in the alternation procedure that produces, uses at biogas, artificial swamp is in the alternation of wetting and drying state, has nitrated-denitrification effect.This wastewater treatment equipment and method have following remarkable advantage: do not consume energy, operational and administrative expenses is low; Mud is few; Operational management is convenient, does not need the personal management, is easy to safeguard; Can reclaim the energy-biogas, and not need independent biogas gas storage device.This treatment process does not still have to take into account preferably the anaerobic digestion process technology of methane gas producing, organic fertilizer production and environmental protection treatment; fail to take into account the environment protection and the Organic farming of new energy development, sewage disposal, the specific aim of its technology is still more single.
Summary of the invention
The present invention provides a kind of anaerobic digestion handling method that biogas fertilizer environmental protection connection is imitated that is used for for solving the above-mentioned defective of prior art, and the equipment of implementing this anaerobic digestion handling method is provided simultaneously.The present invention can effectively take into account new energy development, organic fertilizer production and environmental protection treatment and handle, and technological process in simple and practical, is suitable for promoting.
For reaching above-mentioned technique effect, technical scheme of the present invention is made of following content:
Anaerobic digestion handling method in a kind of biogas production process is characterized in that: described anaerobic digestion handling method is by anaerobic fermentation gas production, and deslagging, solid-liquid separation and collection two portions thereof constitute; Described anaerobic fermentation gas production comprises feed liquid flow process, charging, aerogenesis; Described solid-liquid separation and collection thereof comprise deslagging, solid-liquid separation, the collection of natural pond slag.
------one-level anaerobically fermenting pond (sediment enters second pond)---B grade anaerobic fermentation pond (sediment enters second pond)---heavy pond (sediment enters second pond)---second pond (sediment takes out and places solid-liquid separation tank)---three heavy ponds (sediment takes out and places solid-liquid separation tank)---organic filtering layer---drawing liquid pond---field irrigation fertilising that feed liquid enters equalizing tank that described feed liquid flow process is specially: argol and flushing sewage are collected (argol directly enters one-level anaerobically fermenting pond) respectively.
Described charging is specially: argol is delivered to the anaerobically fermenting pond by dung-cart, by mechanical lifting to the top, pond, enter in the pond by delivering to Chi Kou in the excrement mortise, the mode of water impact is adopted in the conveying of argol in mortise again, and its method is to extract the last clear natural pond liquid of discharging of native system with pump argol is poured in the pond.
Flushing sewage enters annular equalizing tank by pipe (ditch) gravity flow or lifting, equalizing tank is that whole one-level anaerobic ponds are shared, volume is 10～15% of an anaerobically fermenting pond cubic capacity, feed liquid is squeezed into from bottom, one-level anaerobically fermenting pond respectively by inlet amount and feed cycle design with pump.Adopt high-power powerful mode of jet when pumping into feed liquid, make it feed liquid in the pond is formed stirring, so this technology can not be provided with agitator separately.
Inlet amount and feed cycle: the adding mode of feed liquid is every group of (anaerobically fermenting pond) charging every day, and each every group inlet amount is the 1/n (n is an anaerobically fermenting pond group number, down together) of feed liquid total amount every day, and promptly the reduction of feed volume of every day will all be gone into the pond same day.The adding mode of argol is the cyclic gap formula, and the gap fate is n days, and each every group inlet amount is whole total amounts of argol every day, has every day one group of pond to advance argol, and promptly the same day also will all be gone into the pond by the argol of every day.
Described fermentation gas is specially: fermentation gas is divided into many groups, form by one or several one grade fermemtation ponds and a second order fermentation pond for every group, a shared B grade anaerobic fermentation pond, several one grade fermemtation ponds, each anaerobically fermenting pond all is a updraft anaerobic filter, the blade diameter length ratio in requirement anaerobically fermenting pond should be less than 1, the purpose that the firsts and seconds anaerobically fermenting is set is to strengthen the solid-liquid separation of anaerobism part, to increase its gas production rate.
The fermentation vat cubic capacity calculated (all going into the pond and strengthen solid-liquid separation to need longer residence time because of argol) greater than 10 days by waterpower residence time, and wherein the volumetric ratio of one-level anaerobism and secondary anaerobic is greater than 2.
Fermented type is middle temperature, leavening temperature 28～38 degree, and type of heating is hot-water line pond internal recycle heating (can adopt the waste heat heat supply of marsh gas power generation factory).
In each anaerobically fermenting pond soft or semi soft packing is installed all, mounting face is greater than 2/3 of pond body cross section, filler is installed and is adopted frame-type to hang on body middle and upper part, pond, this mounting means is convenient to propose flushing from Chi Kou, also can wash in the pond, because flushing is convenient, this technology has strengthened amount of filler, be detained to strengthen solid-liquid separation and bacterial classification (purpose: increase gas production rate), the filler flushing cycle is consistent with the deslagging cycle.
Described deslagging is specially: the end slag in all anaerobically fermenting ponds and a heavy pond all enters a shared second pond, be lower than at the bottom of the second pond pond at the bottom of the fermentation vat pond more than one meter, each fermentation vat all has a deslagging pipe valve that is installed at the bottom of the pond, during deslagging the argol impact tube of Chi Ding is stretched at the bottom of the pond, stir end slag with waterpower, each deslagging can bleed off 1/2 to 2/3 of the feed liquid pond in, washes filler with the argol impact tube immediately behind the deslagging.The one-level anaerobic pond deslagging cycle is 3 months, and a secondary anaerobic pond and a heavy pond deslagging cycle are 6 months.
Described solid-liquid separation is specially:
Solid-liquid separation for the first time: precipitation in the one-level anaerobic pond and filler interception.
Solid-liquid separation for the second time: precipitation the secondary anaerobic pond in and filler are tackled.
Solid-liquid separation for the third time: the precipitate and separate in the heavy pond.One heavy pond is that all secondary anaerobic ponds are shared, and its volume is 5～10% of an anaerobic pond cubic capacity.
The 4th solid-liquid separation: the precipitate and separate in the second pond.Second pond is annular or long strip shape, is that all anaerobically fermenting ponds and a heavy pond are shared, and its volume is 10～15% of an anaerobic pond cubic capacity.Two stages of this pond precipitation: the one, in the daily charging discharge stage, the feed liquid of every day enters second pond again through the heavy pond of fermentation vat to, and the design of annular or long strip shape makes feed liquid form long precipitation distance in this pond, and sedimentation time is 1～1.5 day; The 2nd, in the deslagging stage, the end slag in an anaerobic pond and a heavy pond all directly enters second pond, but can only carry out deslagging in 1～2 pond at every turn.
The 5th solid-liquid separation: the precipitate and separate in the three heavy ponds.Three heavy ponds are the same with the second pond shape, and carry out the bottom with it and be connected, and volume is less than or equal to second pond, and feed liquid is entered by second pond, carries out precipitate and separate once more.
The 6th solid-liquid separation: the afterbody in three heavy ponds is provided with the machine filter bed of material, and feed liquid is filtered at last.Available crushing straw is as organic filtrate, and the sediment that after each deslagging finishes it is taken out together with two, three heavy ponds is sent to fertilizer factory production fertilizer, changes new organic filter material layer then.Organic filter material layer volume is 20～30% of three heavy pool volumes, and feed liquid flows to can take flat flow or downflow system.
The 7th solid-liquid separation: in three heavy peripheries, pond the shallow pond of several solid-liquid separation is set, the degree of depth is less than one meter, and effect is that last natural pond slag and the organic filtrate that takes out stacked at this, allows wherein moisture flow out naturally and is back to three heavy ponds.
Described natural pond slag is collected and is promptly collected the natural pond slag that focuses at last in two, the three heavy ponds, be specially: in three heavy ponds, after organic filter material layer a drawing liquid pond is set, be lower than at the bottom of this pond, pond at the bottom of two, the three heavy ponds, pond, the volume no requirement (NR), its effect is that the clear liquid in two, three heavy ponds is all taken out to the greatest extent, then the natural pond slag in two, the three heavy ponds is all taken out with machinery and artificial auxiliary way, be stacked at solid-liquid separation tank, can transport fertilizer factory to behind the stacking certain hour together with the organic filtrate that takes out.
A kind of biogas anaerobic fermentation device that is used for the anaerobic digestion handling method of biogas production process, comprise equalizing tank and be located at the interior settling tank of equalizing tank, it is characterized in that: be provided with cellular fermentation unit in the described settling tank, described cellular fermentation unit constitutes honeycomb by at least three separate processing units and forms, and each processing unit is communicated with described settling tank by the pipeline of bottom.
Described processing unit is the Polygons cylinder, is made of bay wall and chop lid, and each cylinder has the cylinder more than two to combine closely, and is arranged on the same base plate after forming an integral body.
Beneficial effect: producing the dirty three of processing of biogas, recovery organic matter and excrement is a contradictory entity, but unified more than contradiction, makes full use of unified face on the one hand, solves its contradiction face on the other hand, is the basic point of this Technology, also is its advantage place.The present invention can effectively take into account new energy development, organic fertilizer production and environmental protection treatment and handle, and technological process in simple and practical, is suitable for promoting.Particularly, beneficial effect of the present invention shows following several aspect:
1, this technology satisfied society and owner in the anaerobic digestion engineering to aerogenesis (biogas), produce demand in fertile (fertilizer), the environmental protection three, and can satisfy three individual events optimised process requirement separately, solve the problem of attending to one thing and lose sight of another preferably, be characterized in having significant comprehensive and remarkable economic efficiency.In whole technology, extensively and profoundly reinforcement is arranged for the measure that increases gas production rate and solid-liquid separation.
2, can bring into play best aerogenesis (biogas) effect.The one, argol is all gone into the pond, has guaranteed competent fermentation raw material; The 2nd, argol and flushing sewage enter the pond respectively, and the fermentation concentration in the pond can effectively be regulated and control, and reach the optimum concn of fermentation gas requirement; The 3rd, with upflowing and the more filler of installation, strengthened the solid-liquid separation in the fermentation vat, effectively prolonged the residence time of organic solid in fermentation vat, increased the attaching surface of microorganism simultaneously; The 4th, impact argol with the natural pond liquid after the fermentation and go into the pond, play the effect that bacterial classification refluxes.
Add that mesophilic digestion and appropriate charging, deslagging cycle arrange etc., the pond of this technology holds factor of created gase can reach 1.0m3/m3.d.
3, can reach best set fertilizer (fertilizer) effect.Solid-liquid separation is through haveing suffered technical process all the time, amount to seven times more than, each solid-liquid separation all can play a role effectively, organic filter material layer is effectively tackled the small highland barley grain in the feed liquid, last drawing liquid pond and two, three heavy ponds and cooperating of organic filter material layer final solid-liquid separation is achieved.The final solid-liquid separation rate of technology can reach more than 90%, and isolated organic solid (natural pond slag) rate of recovery can reach 100%, and this is a first-class raw material of making fertilizer.Utilized one of the raw material of making fertilizer (as crushing straw) as to the last filtering material of feed liquid dexterously, both satisfied filtering requirement, also saved the filtrate spending, increased the raw material of making fertilizer again, also need not handle filtrate.
4, can reach environmental protection treatment effect preferably.The one, sufficient fermentation has formed sufficient degraded to organic matter; The 2nd, abundant and long anaerobism has carried out dying extremely to worm's ovum in the sewage (comprising the excrement slag) and unwanted bacteria; The 3rd, the recovery at high proportion of abundant, effective solid-liquid separation and organic solid, make total solids level, TOC, suspended substance, indexs such as COD, BOD in the final liquid effluent can both reach a level preferably, if add corresponding subsequent processing, can reach emission standard substantially, if do not discharge, then as the fertigation in farmland and forest land, this is extra effective utilization measure, is best subsequent disposal.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Fig. 2 is deslagging of the present invention and collection process schema thereof
Fig. 3 is an anaerobic fermentation device of air sectional view of the present invention.
Fig. 4 is an anaerobic fermentation gas production setting plane of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.As Fig. 1, the present invention is a kind of anaerobic digestion handling method that biogas production fertilizer environmental protection connection is imitated that is used for.It comprises two parts: the one, and the anaerobic fermentation gas production Technology.The 2nd, deslagging, solid-liquid separation and collection process technology thereof.These two portions connect each other, are organic unity bodies.
1, anaerobic fermentation gas production Technology
(1) anaerobically fermenting feed liquid main-process stream
------one-level anaerobically fermenting pond (sediment enters second pond)---B grade anaerobic fermentation pond (sediment enters second pond)---heavy pond (sediment enters second pond)---second pond (sediment takes out and places solid-liquid separation tank)---three heavy ponds (sediment takes out and places solid-liquid separation tank)---organic filtering layer---drawing liquid pond---field irrigation fertilising that feed liquid enters equalizing tank that argol and flushing sewage are collected (argol directly enters one-level anaerobically fermenting pond) respectively.
(2) feeding process design
Feeding manner:
Argol is delivered to the anaerobically fermenting pond by dung-cart, by mechanical lifting to the top, pond, deliver to Chi Kou by the argol mortise again and enter in the pond, the mode of water impact is adopted in the conveying of argol in mortise, and its method is to extract the last clear natural pond liquid of discharging of native system with pump argol is poured in the pond.Flushing sewage enters annular equalizing tank by pipe (ditch) gravity flow or lifting, equalizing tank is that whole one-level anaerobic ponds are shared, volume is 10～15% of an anaerobically fermenting pond cubic capacity, feed liquid is squeezed into from bottom, one-level anaerobically fermenting pond respectively by inlet amount and feed cycle design with pump.Adopt high-power powerful mode of jet when pumping into feed liquid, make it feed liquid in the pond is formed stirring, so this technology can not be provided with agitator separately.
Inlet amount and feed cycle design:
The adding mode of feed liquid is every group of (anaerobically fermenting pond) charging every day, and each every group inlet amount is the 1/n (n is an anaerobically fermenting pond group number, down together) of feed liquid total amount every day, and promptly the reduction of feed volume of every day will all be gone into the pond same day.The adding mode of argol is the cyclic gap formula, and the gap fate is n days, and each every group inlet amount is whole total amounts of argol every day, has every day one group of pond to advance argol, and promptly the same day also will all be gone into the pond by the argol of every day.
(3) fermentation gas technological design
Fermentation gas is divided into a plurality of groups, form by one or several one grade fermemtation ponds and a second order fermentation pond for every group, a shared B grade anaerobic fermentation pond, several one grade fermemtation ponds, each anaerobically fermenting pond all is a updraft anaerobic filter, the blade diameter length ratio in anaerobically fermenting pond should be less than 1, the purpose that the firsts and seconds anaerobically fermenting is set is to strengthen the solid-liquid separation of anaerobism part, to increase its gas production rate.
Need longer residence time because argol is all gone into the pond and strengthened solid-liquid separation, the fermentation vat cubic capacity calculated greater than 10 days by waterpower residence time, and wherein the volumetric ratio of one-level anaerobism and secondary anaerobic is greater than 2.Fermented type is middle temperature, and leavening temperature 28～38 degree, type of heating are the internal recycle heating of hot-water line pond, can adopt the waste heat heat supply of marsh gas power generation factory.
In each anaerobically fermenting pond soft or semi soft packing is installed all, mounting face is greater than 2/3 of pond body cross section, filler is installed and is adopted frame-type to hang on body middle and upper part, pond, this mounting means is convenient to propose flushing from Chi Kou, also can wash in the pond, because flushing is convenient, this technology has strengthened amount of filler, to strengthen solid-liquid separation and the bacterial classification purpose of being detained serves as to increase gas production rate, and the filler flushing cycle is consistent with the deslagging cycle.
2, deslagging, solid-liquid separation and collection process technology thereof
(1) deslagging technological design
The Slagoff method design:
The end slag in all anaerobically fermenting ponds and a heavy pond all enters a shared second pond, be lower than at the bottom of the second pond pond at the bottom of the fermentation vat pond more than one meter, each fermentation vat all has a deslagging pipe valve that is installed at the bottom of the pond, during deslagging " the argol impact tube " of Chi Ding stretched at the bottom of the pond, stir end slag with waterpower, each deslagging can bleed off 1/2 to 2/3 of the feed liquid pond in, uses " argol impact tube " to wash filler behind the deslagging immediately.The design of deslagging cycle: the one-level anaerobic pond is 3 months, and a secondary anaerobic pond and a heavy pond are 6 months.
(2) solid-liquid separation process design
Solid-liquid separation for the first time: precipitation in the one-level anaerobic pond and filler interception.
Solid-liquid separation for the second time: precipitation the secondary anaerobic pond in and filler are tackled.
Solid-liquid separation for the third time: the precipitate and separate in the heavy pond.One heavy pond is that all secondary anaerobic ponds are shared, and its volume is 5～10% of an anaerobic pond cubic capacity.
The 4th solid-liquid separation: the precipitate and separate in the second pond.Second pond is annular or long strip shape, is that all anaerobically fermenting ponds and a heavy pond are shared, and its volume is 10～15% of an anaerobic pond cubic capacity.Two stages of this pond precipitation: the one, in the daily charging discharge stage, the feed liquid of every day enters second pond again through the heavy pond of fermentation vat to, and the design of annular or long strip shape makes feed liquid form long precipitation distance in this pond, and sedimentation time is 1～1.5 day; The 2nd, in the deslagging stage, the end slag in an anaerobic pond and a heavy pond all directly enters second pond, but can only carry out deslagging in 1～2 pond at every turn.
The 5th solid-liquid separation: the precipitate and separate in the three heavy ponds.Three heavy ponds are the same with the second pond shape, and carry out the bottom with it and be connected, and volume is less than or equal to second pond, and feed liquid is entered by second pond, carries out precipitate and separate once more.
The 6th solid-liquid separation: the afterbody in three heavy ponds is provided with the machine filter bed of material, and feed liquid is filtered at last.Available crushing straw is as organic filtrate, and the sediment that after each deslagging finishes it is taken out together with two, three heavy ponds is sent to fertilizer factory production fertilizer, changes new organic filter material layer then.Organic filter material layer volume is 20～30% of three heavy pool volumes, and feed liquid flows to can take flat flow or downflow system.
The 7th solid-liquid separation: in three heavy peripheries, pond the shallow pond of several solid-liquid separation is set, the degree of depth is less than one meter, and effect is that last natural pond slag and the organic filtrate that takes out stacked at this, allows wherein moisture flow out naturally and is back to three heavy ponds.
(3) natural pond slag collection process design
By the deslagging technology of front, last whole natural pond slag all focuses on two, three heavy ponds, can concentrate and collect.In three heavy ponds, after organic filter material layer a drawing liquid pond is set, be lower than at the bottom of this pond, pond at the bottom of two, the three heavy ponds, pond, the volume no requirement (NR), its effect is that the clear liquid in two, three heavy ponds is all taken out to the greatest extent, then the natural pond slag in two, the three heavy ponds is all taken out with machinery and artificial auxiliary way, be stacked at solid-liquid separation tank together with the organic filtrate that takes out, can transport fertilizer factory to behind the stacking certain hour.
Fig. 2, Fig. 3 are for implementing the cellular biogas anaerobic fermentation device that anaerobic digestion handling method adopts, comprise equalizing tank 1 and the settling tank of being located in the equalizing tank 12, be provided with cellular fermentation unit 3 in the described settling tank 2, cellular fermentation unit 3 constitutes honeycomb by a plurality of separate Polygons cylinders 4 and forms, each Polygons cylinder 4 is as a fermentation vat independently, and the pipeline 5 by the bottom is communicated with settling tank 2.Polygons cylinder fermentation vat 4 covers 7 by pool wall 6 and chop and constitutes, and each cylinder 4 has the cylinder 4 more than two to combine closely, and is arranged on the same base plate 8 after forming an integral body.Pipeline 5 is communicated with cylinder fermentation vat 4 and settling tank 2 by base plate 8, and the exterior wall 9 of cellular fermentation unit 3 can be linear, arc or circle.
The present invention can effectively take into account new energy development, organic fertilizer production and environmental protection treatment and handle, and technological process in simple and practical, is suitable for promoting.
Claims (8)
1. the anaerobic digestion handling method in the biogas production process, it is characterized in that: described anaerobic digestion handling method is by anaerobic fermentation gas production, and deslagging, solid-liquid separation and natural pond slag thereof are collected two portions and constituted; Described anaerobic fermentation gas production comprises charging and aerogenesis; The feed liquid flow process is in the described treatment process: the colony house argol directly enters a doubly upflowing one-level anaeroic digestor of n group n, and after clear excrement and wash-down water entered annular equalizing tank, feed liquid entered a doubly upflowing one-level anaeroic digestor of n group n again; Sediment in the one-level anaeroic digestor enters annular second pond, and feed liquid enters a doubly upflowing secondary anaerobic digestive organ of n group n; Sediment in the secondary anaerobic digestive organ enters annular second pond, and feed liquid enters a heavy pond; Sediment and feed liquid in the one heavy pond enter annular second pond; Feed liquid in the annular second pond enters annular three heavy ponds, afterbody in annular three heavy ponds is provided with the machine filter bed of material, feed liquid is carried out last filtration, clear liquid after the filtration is sent to farmland, forest land fertigation after entering the drawing liquid pond, wherein argol is impacted in the clear liquid pumpback in the drawing liquid pond, plays the effect that bacterial classification refluxes; Transport fertilizer factory to after natural pond slag in annular second pond and the annular three heavy ponds and organic filtrate of organic filter material layer are stacked at natural pond slag solid-liquid separation tank together, wherein the clear liquid in the solid-liquid separation tank flows out naturally, and flows back to annular three heavy ponds; Wherein the biogas of one-level anaeroic digestor and secondary anaerobic digestive organ generation merges collection.
2. the anaerobic digestion handling method in the biogas production process according to claim 1, it is characterized in that: described charging is specially: argol is delivered to anaeroic digestor by dung-cart, by mechanical lifting to the digestive organ top, deliver to the digestive organ mouth by the argol mortise again and enter in the digestive organ, the mode of water impact is adopted in the conveying of argol in mortise; Wash-down water enters annular equalizing tank, and equalizing tank is that whole one-level anaeroic digestors are shared, and volume is 10～15% of an anaeroic digestor cubic capacity, feed liquid is squeezed into from one-level anaeroic digestor bottom respectively by inlet amount and feed cycle design with pump.
3. the anaerobic digestion handling method in the biogas production process according to claim 2, it is characterized in that: described inlet amount and feed cycle design: the adding mode of feed liquid is charging every day of every group of anaeroic digestor, each every group inlet amount is the 1/n of feed liquid total amount every day, n is an anaeroic digestor group number, and promptly the reduction of feed volume of every day will all be gone into digestive organ the same day; The adding mode of argol is the cyclic gap formula, and the gap fate is an anaeroic digestor group number, and each every group inlet amount is whole total amounts of argol every day, has every day one group of digestive organ to advance argol, and promptly the same day also will all be gone into digestive organ by the argol of every day.
4. the anaerobic digestion handling method in the biogas production process according to claim 1, it is characterized in that: described fermentation gas is specially: fermentation gas is divided into a plurality of groups, form by one or more one-level anaeroic digestors and a secondary anaerobic digestive organ for every group, the shared secondary anaerobic digestive organ of a plurality of one-level anaeroic digestors, each anaeroic digestor all is a updraft anaerobic filter.
5. the anaerobic digestion handling method in the biogas production process according to claim 4, it is characterized in that: soft or semi soft packing all is installed in each anaeroic digestor, mounting face is greater than 2/3 of digestion body cross section, and filler is installed and adopted frame-type to hang on digestion body middle and upper part.
6. the anaerobic digestion handling method in the biogas production process according to claim 1, it is characterized in that: described deslagging is specially: the end slag in all anaeroic digestors and a heavy pond all enters a shared second pond, be lower than at the bottom of the second pond pond at the bottom of the anaeroic digestor more than one meter, each anaeroic digestor all has a deslagging pipe valve that is installed at the bottom of the digestive organ, the argol impact tube that during deslagging digestive organ is pushed up stretches at the bottom of the digestive organ, stir end slag with waterpower, each deslagging bleeds off 1/2 to 2/3 of the interior feed liquid of digestive organ, wash filler with the argol impact tube immediately behind the deslagging, the one-level anaeroic digestor deslagging cycle is 3 months, and a secondary anaerobic digestive organ and a heavy pond deslagging cycle are 6 months.
7. the anaerobic digestion handling method in the biogas production process according to claim 1 is characterized in that: described solid-liquid separation is specially:
Solid-liquid separation for the first time: to precipitation in the one-level anaeroic digestor and filler interception;
Solid-liquid separation for the second time: to precipitation in the secondary anaerobic digestive organ and filler interception;
Solid-liquid separation for the third time: to the precipitate and separate in the heavy pond, a heavy pond is that all secondary anaerobic digestive organs are shared, and its volume is 5～10% of an anaeroic digestor cubic capacity;
The 4th solid-liquid separation: to the precipitate and separate in the second pond, second pond is an annular, be that all anaeroic digestors and a heavy pond are shared, its volume is 10～15% of an anaeroic digestor cubic capacity, two stages of this pond precipitation: the one, the daily charging discharge stage, the feed liquid of every day enters second pond again through the heavy pond of anaeroic digestor to, the annular design makes feed liquid form long precipitation distance in this pond, sedimentation time is 1～1.5 day, the 2nd, the deslagging stage, the end slag in an anaeroic digestor and a heavy pond all directly enters second pond, but at every turn can only a heavy pond deslagging or 1～2 anaeroic digestor carry out deslagging;
The 5th solid-liquid separation: to the precipitate and separate in the three heavy ponds, three heavy ponds are the same with the second pond shape, and carry out the bottom with it and be connected, and volume is less than or equal to second pond, and feed liquid is entered by second pond, carries out precipitate and separate once more;
The 6th solid-liquid separation: the afterbody in three heavy ponds is provided with the machine filter bed of material, feed liquid is filtered at last, with crushing straw as organic filtrate, the sediment that after each deslagging finishes it is taken out together with two, three heavy ponds is sent to fertilizer factory production fertilizer, change new organic filter material layer then, organic filter material layer volume is 20～30% of three heavy pool volumes, and feed liquid flows to takes flat flow or downflow system;
The 7th solid-liquid separation: in three heavy peripheries, pond several solid-liquid separation tanks are set, allow wherein moisture flow out naturally and be back to three heavy ponds.
8. the anaerobic digestion handling method in the biogas production process according to claim 1, it is characterized in that: slag collection in described natural pond is the natural pond slag in centralized collection two, the three heavy ponds, be specially: in three heavy ponds, after organic filter material layer a drawing liquid pond is set, natural pond slag in two, the three heavy ponds is all taken out with machinery and artificial auxiliary way, transport fertilizer factory to after being stacked at solid-liquid separation tank together with organic filtrate of taking-up.
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| CN103159510B (en) * | 2013-04-10 | 2015-08-12 | 张汉飚 | A kind of plant animal excrement processing and utilizing system |
| CN103910549B (en) * | 2014-03-11 | 2016-03-30 | 福建省绿蔬园生态农业发展有限公司 | For solving nutritive medium and the application process thereof of solanaceous vegetables crop fruiting period calcium deficiency |
| CN104480006B (en) * | 2015-01-22 | 2016-01-20 | 张伟伟 | Be communicated with fermentation zone and promote the high-efficiency methane generation systems that flowing is stirred |
| CN104817244A (en) * | 2015-04-22 | 2015-08-05 | 福建省农业科学院农业工程技术研究所 | Biogas slurry zero-release using system and method |
| CN106416664A (en) * | 2016-08-30 | 2017-02-22 | 内蒙古华蒙科创环保科技工程有限公司 | Alfalfa planting method in which biogas slurry field returning technology is adopted |
| CN106754283A (en) * | 2016-12-13 | 2017-05-31 | 陕西理工学院 | One kind circulation solid-liquid B grade anaerobic fermentation system |
| CN109797099A (en) * | 2019-03-12 | 2019-05-24 | 烟台青源环保科技有限公司 | Marsh gas treatment device and treatment process based on night soil and stalk |
| CN110498505B (en) * | 2019-09-17 | 2024-05-17 | 如皋市住房和城乡建设局 | Distributed non-electric non-medical domestic sewage treater |
| CN113149721A (en) * | 2021-02-02 | 2021-07-23 | 陕西科技大学 | Kitchen waste treatment method |
| CN114315027B (en) * | 2021-12-28 | 2023-01-06 | 生态环境部华南环境科学研究所 | Harmless treatment method for natural storage of liquid manure and natural storage pool thereof |
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