CN102115344A - Two-phase integral anaerobic digestion process and equipment for treating biomass solid wastes - Google Patents
Two-phase integral anaerobic digestion process and equipment for treating biomass solid wastes Download PDFInfo
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- CN102115344A CN102115344A CN2010105761763A CN201010576176A CN102115344A CN 102115344 A CN102115344 A CN 102115344A CN 2010105761763 A CN2010105761763 A CN 2010105761763A CN 201010576176 A CN201010576176 A CN 201010576176A CN 102115344 A CN102115344 A CN 102115344A
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
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Abstract
The invention provides a two-phase integral anaerobic digestion process for treating biomass solid wastes. The solid wastes are placed into a hydrolysis acidification unit with the temperature of 32-38 DEG C and pH value of 6.5-7.5 and are stirred at a constant velocity, and hydrolysis acidification liquid generated from the hydrolysis acidification unit flows back to a methane reacting unit through an acidification liquid backflow unit. The invention also provides equipment for realizing the process. By adopting the two-phase integral anaerobic digestion process and equipment provided by the invention, an acid producing phase micropopulation and a methane producing phase micropopulation of a two-phase anaerobic process system play respective role of degradation in different spaces of the same reactor, the complementary cooperation of the acid producing phase micropopulation and the methane producing phase micropopulation is enhanced, the property of solid-liquid sedimentation and separation is improved, the equipment investment is reduced, and the land occupation of the engineering is saved; and in addition, the equipment is started within shorter time, and is stable to operate and easy to control.
Description
Technical field
The invention belongs to the environmental improvement field, relate to a kind of high solid TPAD technology, relate in particular to a kind of two-phase integral anaerobic digestion process and equipment that is used to handle the biomass solid waste.
Background technology
Along with China's rapid development of economy, the generation of solid waste increases year by year.The biomass solid waste is a part bigger in the solid waste, the biomass solid waste is the human waste that production and consumption produces in utilizing the process of biomass, it still belongs to macroscopical category of biomass, but energy density, utilizability etc. all have significant reduction.Biomass waste can be divided into urban biomass refuse and agricultural wastes according to different sources.The urban biomass refuse mainly comprises household kitchen wastes, changing food waste, urban night soil and city sludge; Agricultural wastes are meant the organic class material that is dropped in whole agricultural production process, mainly comprise: the vegetable remains class waste that produces in the agricultural and forestry production process; The remaining waste of the animal class of herding, producing in the fish production process; Remaining waste of the processing class that produces in the agricultural course of processing and rural urbanization domestic refuse etc. on total amount and composition, mainly comprise agricultural crop straw and animal waste.The recycle of solid waste realizes the recycling economy development pattern for China, realizes that social sustainable development has important effect.Utilize the higher solid waste of anaerobic digestion techniques processing and utilizing biological degradability, not only can produce higher-grade biogas energy efficient, cleaning, produced simultaneously natural pond slag and natural pond liquid can also be to use wider resource technology in China directly as organic fertilizer.A difficult problem such as utilize that traditional anaerobically fermenting producing methane art breading solid waste exists that solid-liquid difficult separates, the acid inhibition and the ammonia of high solid content anaerobically fermenting suppress, the natural pond liquid after the fermentation and natural pond slag difficulty are put, and the conveying of solid materials, stirring difficulty, the hydrolysis rate of solid organic matters is low, is necessary at the material characteristic of solid waste traditional anaerobic treatment process further to be studied and improved.
Classify by the reaction number of phases, high solid anaerobic digestion technology can be divided into: single-phase anaerobic digestion and TPAD.Have during single-phase anaerobic digestion material conveying, stir poor, the material component complexity of hydrolysis rate solid-liquid sedimentation and separation property low, material of difficulty, solid organic matters, may produce problems such as inhibition intermediate product in the anaerobic digestion process.For the single-phase anaerobic digestion of high solid material, solid materials TPAD technology major advantage be the hydrolysis rate-limiting step is separated with methanation and optimization, optimize processing condition and difference in functionality flora growing environment, improve produce methane mutually the methanogenesis activity of mud improve the raw material gas producing efficiency, improve the stability and the treatment effect of entire treatment system.TPAD technology also exists unstable, the floor space between processing efficiency, solid substrate type and the type of reactor of the syntrophism relation broken between the certain micro-organisms population, regulation and control complex effects reactor big, invests shortcomings such as relatively large.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the object of the present invention is to provide a kind of two-phase integral anaerobic digestion process that is used to handle the biomass solid waste, the product acid that can make the diphasic anaerobic technique system mutually and product methane mutually micropopulation in the different spaces of same reactor, bring into play separately Degradation, possessed the advantage that traditional high solid TPAD is separated, overcome simultaneously its shortcoming again, realizing that two are separated, eliminate on the basis of restrictive function between the two, strengthen the complementation synergy between the two, improve the solid-liquid sedimentation and separation property, facility investment reduces, save project occupation of land, start time is shorter, stable, be easy to control.
To achieve these goals, the technical solution used in the present invention is:
A kind of two-phase integral anaerobic digestion process that is used to handle the biomass solid waste, solid waste is put into the acidication unit, 32～38 ℃ of temperature ranges, pH value 6.5～7.5, at the uniform velocity stir, the acidication liquid that the acidication unit produces is back to by the acidizing fluid reflux unit and produces the methane reaction unit, described acidication unit is second closed reactor that fluid hole is arranged, described product methane reaction unit is first sealed reactor that production well is arranged, second closed reactor is positioned at the first closed reactor inner and upper, the liquid outlet of second closed reactor is downward, the bottom inoculation anaerobic grain sludge of first sealed reactor.
The present invention also provides a kind of equipment of realizing this technology, comprise tank body 15, leave air outlet 1 on the top cover 2 of tank body 15, acidication reaction cylinder 3 is arranged above tank body 15 inside, acidication reaction cylinder 3 is the round shape of closed at both ends, drum perforations 4 is arranged on its barrel, acidication reaction cylinder 3 is along turning axle 6 is arranged on the central shaft of tube length direction, the two ends of turning axle 6 are installed on the sidewall of tank body 15, by motor 8 controls, in tank body 15 inside, the below of acidication reaction cylinder 3, be provided with backflow header 10, backflow header 10 connects return line 11, and return line 11 is positioned at the outside of tank body 15, and it is provided with reflux pump 12, the other end of return line 11 connects backflow water distributor 14, and backflow water distributor 14 is positioned at the pot bottom of tank body 15.
Prior art is compared, and the invention has the advantages that:
1) the present invention is realizing that by the optimization of internal structure two are separated, eliminate on the basis of restrictive function between the two, strengthen complementation, synergy between the two, both realized the biphase separation at same reactor, realize uniting two into one of reactor again, reduced floor space.
2) the present invention utilizes cylinder to stir and mixes common digestion material and realized solid-liquid separation, improved material solid-liquid sedimentation and separation property, overcome and stirred the problem that difficulty influences mass-transfer efficiency in the traditional technology, solved the problem that traditional anaerobic digestion process easily produces scum silica frost, can increase the contact area of solid materials and Digestive system, promote the acidication of material.
3) return line is back to the acidication liquid that produces in the cylinder and produces the methane phase, has solved acidication and has produced the acid accumulation problem mutually, provides enough organic acids mutually for producing methane again.
4) reactor start-up is fast, can put into production at once, and methane content is higher in the gas of stable back.The structure of reactor compactness is convenient to installation and maintenance, and floor space is little.
5) whole anaerobic fermentation process carries out in airtight retort, and behind the material reaction one-period, without any processing, its solid content is higher in the acidication phase cylinder, and reacting rear material can carry out subsequent disposal modes such as compost.The residuum that produces the methane phase is less, solved the big problem of traditional anaerobic treatment water loss, realize that natural pond liquid concentrates, reduce the quantity discharged of natural pond liquid, alleviate the subsequent disposal load of biogas engineering greatly, thereby realized solid waste minimizing, resource utilization, had higher environmental benefit and ecological benefits.
Description of drawings
Fig. 1 is the structural representation of the present invention with equipment.
Fig. 2 is the side-view of the present invention with equipment.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in further details.
A kind of equipment that is used to handle the two-phase integral anaerobic digestion process of biomass solid waste, comprise tank body 15, leave air outlet 1 on the top cover 2 of tank body 15, acidication reaction cylinder 3 is arranged above tank body 15 inside, acidication reaction cylinder 3 is the round shape of closed at both ends, drum perforations 4 is arranged on its barrel, acidication reaction cylinder 3 is along turning axle 6 is arranged on the central shaft of tube length direction, the two ends of turning axle 6 are installed on the sidewall of tank body 15, by motor 8 controls, in tank body 15 inside, the below of acidication reaction cylinder 3, be provided with backflow header 10, backflow header 10 connects return line 11, and return line 11 is positioned at the outside of tank body 15, and it is provided with reflux pump 12, the other end of return line 11 connects backflow water distributor 14, and backflow water distributor 14 is positioned at the pot bottom of tank body 15.
In aforesaid device, acidication reaction cylinder 3 is the acidication reaction member, and other space constitutes product methane reaction unit in the tank body 15, and backflow header 10, return line 11 constitute the acidizing fluid reflux unit with backflow water distributor 14.
The biomass solid waste that will handle carries out preliminary sorting, remove wherein the solid inorganic thing and the hardly degraded organic substance of greater particle size, carry out fragmentation then, the biomass solid waste that fragmentation is the good acidication reaction cylinder 3 of packing into, for guaranteeing good acidizing effect, the biomass solid waste that adds is piled up and is reached acidication reaction cylinder 3 volumetrical 85%, temperature is controlled at 32～38 ℃, the pH value is controlled at 6.5～7.5, control motor 8 makes 3 uniform rotation of acidication reaction cylinder, rotating speed can be set to 5～30rap/min, backflow header 10 is positioned at tank body 15 inside, the below of acidication reaction cylinder 3, when acidication reaction cylinder 3 rotates, the acidication liquid that acidication produces flows out from drum perforations 4, enter backflow header 10, flow to backflow water distributor 14 from backflow header 10 via return line 11 again, and finally enter into and produce the methane reaction unit, the jar end inoculation anaerobic grain sludge of tank body 15, can choose the granule sludge of the UASB of sewage work reactor, after then acidication liquid enters and irritates the end, produce methane gas, the air outlet 1 of opening on the top cover 2 of gas by tank body 15 that produces collects, backflow header 10, the reflux unit that return line 11 and backflow water distributor 14 constitute, can prevent that acidication from producing the acid accumulation problem mutually, can be product methane again enough organic acids are provided mutually, and produce the current of rising mutually producing methane, the mixing that promotes methanogen and substrate with contact
Wherein,, reflux pump 12 is set, simultaneously, interchanger 13 is set also, be used for making the acidication liquid in the tank body 15 to keep optimal reaction temperature at return line 11 for quickening acidication liquid flowing from backflow header 10 to backflow water distributor 14.
The inside of acidication reaction cylinder 3 can be provided with evenly spaced internal partition 5, water receiving is separated the inwall and the turning axle 6 of acidification reaction cylinder 3 in the internal partition 5, react the tube end of cylinder 3 simultaneously perpendicular to acidication, utilize 5 pairs of cylinder inside of internal partition to separate, make material uniform distribution in cylinder, help the mixing of material to stir, and can make cylinder stressed even in rotation process, increase the work-ing life of equipment.
For monitoring the reaction environment of tank interior better, on the tank skin between backflow header 10 and the backflow water distributor 14, also be provided with thief hatch 7 and temp probe 9, thief hatch 7 ends are controlled with valve, its effect is to realize taking a sample from reactor, measure index of correlation and understand inside reactor running condition, temp probe 9 is used for monitoring the temperature of internal-response.
When acidication reaction cylinder 3 charging first after 3 to 5 days, the VFA concentration of acidication reaction cylinder 3 inside descends greatly, can select to continue charging at this moment.
Through test of many times, the biomass solid reactant that adds among the embodiment is chosen urban night soil, domestic waste, agricultural stalk and fowl and animal excrement etc. respectively, and degradation speed is fast, and the gas producing efficiency height has all been obtained good treatment effect.
The invention enables hydrolysis produce acid mutually and product methane mutually micropopulation in the different spaces of same reactor, bring into play separately Degradation, the phase mutual interference is little.Need not add water in the reaction process and regulate the water ratio of material, thoroughly solve the big problem of traditional anaerobic treatment water loss, realize that natural pond liquid concentrates, and reduces the quantity discharged of natural pond liquid, alleviate the subsequent disposal load of biogas engineering greatly, realize the quick degraded and efficient aerogenesis of organic waste.
Claims (8)
1. two-phase integral anaerobic digestion process that is used to handle the biomass solid waste, it is characterized in that, the biomass solid waste is put into the acidication unit, 32～38 ℃ of temperature ranges, pH value 6.5～7.5, at the uniform velocity stir, the acidication liquid that the acidication unit produces is back to by the acidizing fluid reflux unit and produces the methane reaction unit, described acidication unit is second closed reactor that fluid hole is arranged, described product methane reaction unit is first sealed reactor that production well is arranged, second closed reactor is positioned at the first closed reactor inner and upper, the liquid outlet of second closed reactor is downward, the bottom inoculation anaerobic grain sludge of first sealed reactor.
2. a kind of two-phase integral anaerobic digestion process that is used to handle the biomass solid waste according to claim 1 is characterized in that described anaerobic grain sludge is the granule sludge of the UASB of sewage work reactor.
3. a kind of two-phase integral anaerobic digestion process that is used to handle the biomass solid waste according to claim 1 is characterized in that, the amount of the biomass solid waste that described acidication unit adds is its volumetrical 85%.
4. equipment of realizing the two-phase integral anaerobic digestion process of the described processing biomass solid of claim 1 waste, it is characterized in that, comprise tank body (15), leave air outlet (1) on the top cover (2) of tank body (15), acidication reaction cylinder (3) is arranged in the inner top of tank body (15), acidication reaction cylinder (3) is the round shape of closed at both ends, drum perforations (4) is arranged on its barrel, acidication reaction cylinder (3) is along turning axle (6) is arranged on the central shaft of tube length direction, the two ends of turning axle (6) are installed on the sidewall of tank body (15), control by motor (8), in tank body (15) inside, the below of acidication reaction cylinder (3) is provided with backflow header (10), backflow header (10) connects return line (11), and return line (11) is positioned at the outside of tank body (15), and it is provided with reflux pump (12), the other end of return line (11) connects backflow water distributor (14), and backflow water distributor (14) is positioned at the pot bottom of tank body (15).
5. a kind of equipment of handling the two-phase integral anaerobic digestion process of biomass solid waste according to claim 4, it is characterized in that, the inside of acidication reaction cylinder (3) is provided with evenly spaced internal partition (5), the interior water receiving of internal partition (5) is separated the inwall and the turning axle (6) of acidification reaction cylinder (3), reacts the tube end of cylinder (3) simultaneously perpendicular to acidication.
6. a kind of equipment of handling the two-phase integral anaerobic digestion process of biomass solid waste according to claim 4 is characterized in that return line (11) is provided with interchanger (13).
7. a kind of equipment of handling the two-phase integral anaerobic digestion process of biomass solid waste according to claim 4, it is characterized in that, also be provided with thief hatch (7) on the tank body (15), thief hatch (7) is positioned on the tank skin between backflow header (10) and the backflow water distributor (14).
8. a kind of equipment of handling the two-phase integral anaerobic digestion process of biomass solid waste according to claim 4, it is characterized in that, also be provided with temp probe (9) on the tank body (15), temp probe (9) is positioned on the tank skin between backflow header (10) and the backflow water distributor (14).
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| CN2010105761763A CN102115344B (en) | 2010-12-03 | 2010-12-03 | Two-phase integral anaerobic digestion process and equipment for treating biomass solid wastes |
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| CN2010105761763A CN102115344B (en) | 2010-12-03 | 2010-12-03 | Two-phase integral anaerobic digestion process and equipment for treating biomass solid wastes |
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Cited By (13)
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|---|---|---|---|---|
| CN102603140A (en) * | 2012-03-19 | 2012-07-25 | 同济大学 | Process for conducting two-phase anaerobic digestion on sludge by reflux and heating reinforcement |
| CN102603142A (en) * | 2012-03-19 | 2012-07-25 | 同济大学 | Method for producing biogas by aid of intensified anaerobic fermentation of pretreated circular backflow sludge |
| CN102839117A (en) * | 2012-09-25 | 2012-12-26 | 嘉兴职业技术学院 | Hydraulic pressure type two-phase temperature-control methane generating experimental device |
| CN103173348A (en) * | 2011-12-22 | 2013-06-26 | 新奥科技发展有限公司 | Two-phase integrated dry-type anaerobic digestion reactor and treatment method thereof |
| CN103555571A (en) * | 2013-10-16 | 2014-02-05 | 中国科学技术大学苏州研究院 | High-speed economical municipal organic solid waste treatment system and operation method thereof |
| WO2014062137A1 (en) * | 2012-10-18 | 2014-04-24 | Nanyang Technological University | A method for the in-situ thermal-alkaline treatment of organic waste to enhance anaerobic solids degradation and biogas generation |
| CN104651219A (en) * | 2015-02-05 | 2015-05-27 | 中国科学院广州能源研究所 | Device and method for preparing biological gas and liquid organic fertilizer from fruit and vegetable wastes of collecting and distributing center |
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