CN101717793A - Technological method of parallel-connected sequencing batch dry type anaerobic digestion treatment of organic solid waste - Google Patents
Technological method of parallel-connected sequencing batch dry type anaerobic digestion treatment of organic solid waste Download PDFInfo
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- CN101717793A CN101717793A CN200910238451A CN200910238451A CN101717793A CN 101717793 A CN101717793 A CN 101717793A CN 200910238451 A CN200910238451 A CN 200910238451A CN 200910238451 A CN200910238451 A CN 200910238451A CN 101717793 A CN101717793 A CN 101717793A
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- 230000029087 digestion Effects 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000002910 solid waste Substances 0.000 title claims abstract description 18
- 238000012163 sequencing technique Methods 0.000 title claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 15
- 238000006731 degradation reaction Methods 0.000 claims abstract description 9
- 230000015556 catabolic process Effects 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims description 65
- 238000005516 engineering process Methods 0.000 claims description 11
- 239000007787 solid Substances 0.000 claims description 9
- 230000033228 biological regulation Effects 0.000 claims description 8
- 238000003672 processing method Methods 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 6
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims description 3
- 239000002253 acid Substances 0.000 abstract description 8
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 241000894006 Bacteria Species 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000002002 slurry Substances 0.000 abstract 7
- 230000001546 nitrifying effect Effects 0.000 abstract 1
- 238000005507 spraying Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000010813 municipal solid waste Substances 0.000 description 6
- 150000007524 organic acids Chemical class 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 238000011068 loading method Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 3
- 239000010815 organic waste Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 238000011081 inoculation Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000004060 metabolic process Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 238000009264 composting Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000009270 solid waste treatment Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M21/00—Bioreactors or fermenters specially adapted for specific uses
- C12M21/04—Bioreactors or fermenters specially adapted for specific uses for producing gas, e.g. biogas
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- C12M21/00—Bioreactors or fermenters specially adapted for specific uses
- C12M21/16—Solid state fermenters, e.g. for koji production
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- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M23/00—Constructional details, e.g. recesses, hinges
- C12M23/58—Reaction vessels connected in series or in parallel
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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
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Abstract
The invention discloses a technological method of the parallel-connected sequencing batch dry type anaerobic digestion treatment of organic solid wastes, belonging to the technical field of environmental protection. Four sequencing batch dry type anaerobic digestion reaction pots are in parallel connected; each sequencing batch dry type anaerobic digestion reaction pot is correspondingly provided with a biogas slurry collection pool, i.e. the four sequencing batch dry type anaerobic digestion reaction pots (A, B, C, D) respectively correspond to four biogas slurry collection pools (a, b, c, d); and each biogas slurry collection pool is connected with a submerged pump and a valve. Biogas slurry enters a main biogas slurry regurgitated pipe through the submerged pump, enters the corresponding main biogas slurry regurgitated pipe by opening the corresponding valve according to the digestion process of materials and is uniformly sprayed to the materials through a spraying device. The invention forms different technological conditions to furthest activate the activity of two anaerobic nitrifying bacteria to accelerate the degradation of the organic solid wastes and enhance the aerogenesis speed by utilizing the difference of optimal growing environments of acid-producing bacteria and methanogens through the recharge of the biogas slurry.
Description
Technical field
The invention belongs to environmental technology field, relate to a kind of organic solid waste treatment technology.Specifically, this technology is by anaerobic digestion cell in parallel, and natural pond liquid is collected the back control its temperature and potential of hydrogen, then intersect and recharge to the units corresponding lattice, inoculate and temperature regulation, thereby accelerated degradation organic solid waste, and the Apparatus and method for of generation clean energy biogas belong to solid waste disposal technology and biomass energy technical field.
Background technology
At present, the processing mode for organic waste mainly turns to guiding with resource in the world, and method and pattern are varied, and these methods roughly are divided into sanitary landfill method, burning method, composting process, production feed method and anaerobic digestion etc.Wherein, anaerobic digestion has caused the concern of national governments and research institution as clean energy yielding reaction.According to total solids level what, anaerobic digestion techniques can be divided into wet type anaerobic digestion (solid content＜15%) and dry anaerobic digestion (solid content 20%～40%).The time of wet pipe system exploitation, early Technology was ripe relatively, and the case history of present more successful Application is exactly a typical representative as the methane-generating pit in China rural area; Dry system is applied to actual engineering since the nineties in 20th century.Take all factors into consideration once investment and working cost, wet type and dry system are much the same in the input of economic aspect.But the degree to environmental influence is conspicuous.Handle every degraded 1t city organic waste with wet pipe system and need add 1m
3Water, and with the rubbish of dry process digestion equivalent amount, water loss has only the former about 1/10.So the waste water of dry system discharging lacks a lot than wet type.Simultaneously, the adaptive faculty of dry system is strong, does not generally have short circuit phenomenon and occurs, and has higher OLR (Organic Loading Rate, organic loading rate), and more people accept.
And in practical engineering application, because material does not add water or only adds seldom water dilution, the thorough mixing of material is comparatively difficult the dry anaerobic digestion system in, the easier generation acidifying of fermentation materials phenomenon.Based on above reason, people will recharge from the natural pond liquid that reactor bottom comes out to reactor head again, mix with initiate rubbish, not only can allow material and natural pond liquid thorough mixing, this is very crucial for the charging inoculation, the more important thing is that mixing fully can prevent the acidifying of local organic loading superelevation of reactor and digestion material, is the basic goal that natural pond liquid recharges.
But it should be noted that, recharge in the process at natural pond liquid, because the metabolism of acid-producing bacteria is faster than methanogen, directly natural pond liquid is recharged, cause the acid accumulation easily, therefore need Controlling System, make it within the explanation ability of methanogen, avoid the temporary impact of high density inhibition, strengthen the resistibility of impact load and inhibitor.
Summary of the invention
For solving the problem of above-mentioned existence, the invention provides a kind of organic solid waste parallel-connected sequencing batch dry type anaerobic digestion treatment process that recharges based on natural pond liquid intersection.
The objective of the invention is to be achieved through the following technical solutions:
The processing method that a kind of organic solid waste parallel-connected sequencing batch dry type anaerobic digestion is handled, it is characterized in that, this method is by anaerobic digestion cell in parallel, natural pond liquid is collected back its temperature of control and potential of hydrogen, intersect then and recharge to the units corresponding lattice, inoculate and temperature regulation,, produce clean energy biogas with the accelerated degradation organic solid waste; Be provided with the parallel connection of four sequencing batch dry type anaerobic digestion retort in the described technology, each retort is to there being a natural pond liquid collecting tank, promptly four retort A, B, C, D distinguish corresponding a, b, c, four natural ponds of d liquid collecting tank, each natural pond liquid collecting tank all is connected with submerged pump and valve, natural pond liquid enters natural pond liquid through submerged pump and returns the spray house steward, and according to the digestion process according to material, opens corresponding valve, enter corresponding natural pond liquid and return jet branch pipe, natural pond liquid is sprayed onto on the material uniformly by spray equipment.
In above-mentioned processing method, the solid content of the organic solid waste of described digestion process is 40～50%.
In above-mentioned processing method, described technology is operated under 30～40 ℃ medium temperature condition.
The present invention has following advantage:
1, liquid independent collection in natural pond can be controlled the frequency and the amount of recharging of recharging flexibly
The natural pond liquid of each anaerobic digestion reaction vessel is collected separately among the present invention, that can regulate natural pond liquid flexibly under different step of reaction, processing condition recharges the frequency and the amount of recharging, help to shorten the start time of new refuse, the stability of raising system, the degradation process that quickens anaerobic digestion simultaneously.
2, alleviate high organic impact load that organic solid waste is handled the initial stage
Acid-producing bacteria is suitable for growing under acidic conditions, best pH value is 5.8, in the anaerobic digestion process, the metabolism of acid-producing bacteria is faster than methanogen, and hydrolysis stage causes acid accumulation easily, the intersection of natural pond liquid is recharged, make the pH value of raw material jar pass through the adjusting of grog jar backflow natural pond liquid, maintain between 6～7, can effectively alleviate organic acid the HI high impact that anaerobion brought is loaded, guarantee the inoculation between raw material and the grog simultaneously, improved the quick startup of anaerobic technique.
3, accelerate the gas production rate of anaerobic digestion
Contain of the adjusting of a large amount of organic acids natural pond liquid, be back in the grog jar,, fully activate the activity of methanogen, accelerating the gas production rate of anaerobic digestion, and help the steady running of reactor for methanogen provides the sufficient nutrient material through temperature.
4, processing cost is low, operation is simple
The present invention utilizes the processing unit of simple sequencing batch dry type anaerobic digestion retort as organic solid waste, and its operation is obviously simple compared with the treatment process of continous way; The backflow of natural pond liquid can be quickened the degradation speed of organic solid waste in addition, saves a large amount of spaces, reduces the expense of handling; The construction of this technology simultaneously is with to make up facility also relative simple, thus the present invention from economically with concrete operations on all very feasible.
Among the present invention, the OLR of anaerobic digestion reaction is 6.67kg/ (td), and solid retention time is about 30d, and the generation speed of biogas is about 109.9L/kg, and wherein methane production has reached 177.2L/kg VS.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
The natural pond liquid that the invention provides that operation is simple intersects a kind of parallel-connected sequencing batch dry type anaerobic digestion technology of recharging.As shown in Figure 1, long at the digestion time that has the sequencing batch reactor existence now, as to be subject to acid inhibition problem, be provided with the parallel connection of four sequencing batch dry type anaerobic digestion retort, each retort is to there being a natural pond liquid collecting tank, promptly four retort A, B, C, D distinguish corresponding a, b, c, four natural ponds of d liquid collecting tank, and each natural pond liquid collecting tank all is connected with submerged pump and valve.Natural pond liquid enters natural pond liquid through submerged pump and returns the spray house steward, and according to the digestion process according to material, opens corresponding valve, enters corresponding natural pond liquid and returns jet branch pipe, by spray equipment natural pond liquid is sprayed onto on the material uniformly.
Also the present invention is described in further detail in conjunction with the accompanying drawings below by specific embodiment.
Embodiment one: this example is a preference.
As shown in Figure 1, this anaerobic digestion process is provided with four retort altogether, the treatment scale of each retort is 10t, the middle part is provided with natural pond liquid receiving tank at the bottom of the retort jar, adopting single flange perforation collection tube to carry out natural pond liquid collects, natural pond liquid enters natural pond liquid collecting tank through collection arm, house steward, is provided with heating coil in the liquid collecting tank of natural pond, can carry out temperature regulation as required.Whether the natural pond liquid of collecting tank respectively is provided with valve into and out of pipeline, carry out natural pond liquid according to actual needs and collect and recharge.Natural pond liquid after temperature regulation recharges through submerged pump.Under the condition of conditions permit, can also controller be set according to the pH value and the gas production rate of retort, will recharge and realize automatization control, reduce personnel's input, improve the operational efficiency in later stage.
At first fill up organic solid waste in retort A, the unloading phase of still being in owing to system, the organic loading of natural pond liquid is higher, therefore should not recharge.To the beginning of second week, in retort B, fill up organic solid rubbish, at this moment, retort A starts substantially and finishes, and enters the product acid phase, and the natural pond liquid that produces is collected in the liquid collecting tank a of natural pond by collection tube, collect organic acid content height in the liquid of natural pond, cause the pH value lower.Begin to enable natural pond liquid recharge system, the natural pond liquid among a of pond is recharged in jar B, inoculate in advance and temperature regulation, simultaneously the natural pond liquid in the jar B is recycled to pond B, after temperature regulation, recharge to jar A.To the 3rd week, in retort C, fill up organic solid rubbish, same mode is collected natural pond liquid in retort A, B, the C respectively to pond a, b, c, natural pond liquid in a of pond is recharged to jar B, natural pond liquid recharges to jar C in the b of pond, simultaneously the natural pond liquid that organic acid content is high in the c of pond is recharged into a jar A, improve the activity of methanogen in jar A, accelerate gas production rate.Around, in retort D, fill up organic solid rubbish, corresponding respectively the collection, and recharge successively, be that natural pond liquid recharges to jar B in a of pond, natural pond liquid recharges to jar C in the b of pond, and natural pond liquid recharges to jar D in the c of pond, simultaneously the natural pond liquid that organic acid content is high in the d of pond is recharged into a jar A, form a circulation this moment.To the 5th week, the organic waste biological degradation in jar A is thorough substantially, natural pond slag in it can be removed, and the adding new refuse, entering natural pond liquid and recharge circulation, concrete grammar recharges process around the, recharging frequency decides with the palliating degradation degree of the amount of recharging by rubbish in the jar
In this invention, antiseptic project is carried out with waterproof mortar and impregnating material in retort and leachate collection pond, and builds power distribution room and operating device, the configuration submerged pump.The conduit of natural pond liquid should be carried out the flushing of blowback wind when retort is brought down stocks, to prevent obstruction.Natural pond liquid is promoted to the retort top through submerged pump and pours into.In addition, retort should be carried out insulation and handle, and when bringing down stocks to reload, should prevent inclusion of air biogas jar before opening a position.
In other application examples, can increase the quantity and the volume of retort according to the particular case at scene, the position of water pump and model can decide according to the needs at scene, and Controlling System also can be set up or cancels according to field condition.Seal approach should be carried out in the exit of the opening for feed of retort, discharge port and biogas, to guarantee anaerobic environment, should carry out the insulation measure simultaneously, can above retort, seal with solar panels, utilize sun power to be incubated, can help to guarantee the optimum environment of anaerobion, thereby promote the degradation speed of organic solid waste and biogas to produce speed.Natural pond liquid collecting tank utilizes heating coil to carry out temperature regulation.
Claims (3)
1. the processing method handled of organic solid waste parallel-connected sequencing batch dry type anaerobic digestion, it is characterized in that, this method is by anaerobic digestion cell in parallel, natural pond liquid is collected back its temperature of control and potential of hydrogen, intersect then and recharge to the units corresponding lattice, inoculate and temperature regulation,, produce clean energy biogas with the accelerated degradation organic solid waste; Be provided with the parallel connection of four sequencing batch dry type anaerobic digestion retort in the described technology, each retort is to there being a natural pond liquid collecting tank, promptly four retort A, B, C, D distinguish corresponding a, b, c, four natural ponds of d liquid collecting tank, each natural pond liquid collecting tank all is connected with submerged pump and valve, natural pond liquid enters natural pond liquid through submerged pump and returns the spray house steward, and according to the digestion process according to material, opens corresponding valve, enter corresponding natural pond liquid and return jet branch pipe, natural pond liquid is sprayed onto on the material uniformly by spray equipment.
2. processing method according to claim 1 is characterized in that, the solid content of the organic solid waste of described digestion process is 40～50%.
3. processing method according to claim 1 is characterized in that described technology is operated under 30～40 ℃ medium temperature condition.
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| CN200910238451A CN101717793B (en) | 2009-11-20 | 2009-11-20 | Technological method of parallel-connected sequencing batch dry type anaerobic digestion treatment of organic solid waste |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101920258A (en) * | 2010-07-20 | 2010-12-22 | 中国科学院广州能源研究所 | Energy utilization system of organic wastes with zero emission of carbon dioxide |
| CN102491613A (en) * | 2011-11-28 | 2012-06-13 | 杨善让 | System for combined supply of electricity, thermal fertilizer and cold fertilizer through generation of hydrogen and biogas via anaerobic digestion of biomasses |
| CN104404087A (en) * | 2014-11-27 | 2015-03-11 | 辽宁省能源研究所 | Technological method for preparing biogas by utilizing high-concentration organic waste and fermentation system thereof |
| CN110184171A (en) * | 2019-04-16 | 2019-08-30 | 齐鲁工业大学 | A kind of mono- two-phase anaerobic digestion device of perishable organic matter |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1903458A (en) * | 2006-07-31 | 2007-01-31 | 同济大学 | Dumping method for producing garbage dumping gas by using special garbage filling units |
| CN101015832B (en) * | 2007-03-05 | 2010-05-19 | 清华大学 | Denitrification facultative type domestic refuse bioreactor landfill and leachate recirculation process |
| CN101130747A (en) * | 2007-08-17 | 2008-02-27 | 浙江大学 | Technology for methanation processing consumer waste step by step and bioreactor |
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2009
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101920258A (en) * | 2010-07-20 | 2010-12-22 | 中国科学院广州能源研究所 | Energy utilization system of organic wastes with zero emission of carbon dioxide |
| CN102491613A (en) * | 2011-11-28 | 2012-06-13 | 杨善让 | System for combined supply of electricity, thermal fertilizer and cold fertilizer through generation of hydrogen and biogas via anaerobic digestion of biomasses |
| CN102491613B (en) * | 2011-11-28 | 2013-08-14 | 杨善让 | System for combined supply of electricity, thermal fertilizer and cold fertilizer through generation of hydrogen and biogas via anaerobic digestion of biomasses |
| CN104404087A (en) * | 2014-11-27 | 2015-03-11 | 辽宁省能源研究所 | Technological method for preparing biogas by utilizing high-concentration organic waste and fermentation system thereof |
| CN104404087B (en) * | 2014-11-27 | 2018-04-03 | 辽宁省能源研究所 | A kind of process and its fermentation system that biological flue gas is produced using high concentration organic waste |
| CN110184171A (en) * | 2019-04-16 | 2019-08-30 | 齐鲁工业大学 | A kind of mono- two-phase anaerobic digestion device of perishable organic matter |
| CN110184171B (en) * | 2019-04-16 | 2023-12-19 | 齐鲁工业大学 | Perishable organic single-double-phase anaerobic digestion device |
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