CN103008324B - Efficient anaerobic digestion method for self-immobilized biological membranes of kitchen wastes and fruit and vegetable wastes - Google Patents
Efficient anaerobic digestion method for self-immobilized biological membranes of kitchen wastes and fruit and vegetable wastes Download PDFInfo
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Abstract
The invention discloses an efficient anaerobic digestion method for self-immobilized biological membranes of kitchen wastes and fruit and vegetable wastes, relating to the technical field of anaerobic digestion in the field of anaerobic digestion for organic matters. In the prior art, when an immobilized carrier technology formed by using methods such as embedding, cross-linking and combining and the like is applied to an anaerobic digestion matrix with complicated compositions, although a good digestion effect can be achieved, a carrier is easily broken, the application time is short, and the cost is relatively high. According to the invention, by using the self-growing characteristics of microorganisms, after polyethylene or polypropylene three-layer hollow circular packing is immobilized into spiral packing along the running direction of a stirring paddle, under the conditions that the organic load rate is 1-3.25gVS.L-1.d-1 and the carrier loading rate is 25-35%, the packing is cultivated for 5-15 days, and then the packing can be used for continuous anaerobic fermentation. The method disclosed by the invention has the characteristics of high anaerobic digestion efficiency, good stability, long running time, low cost and the like, and can be applied to the production of biogas through efficient anaerobic digestion of organic residues such as kitchen wastes, fruit and vegetable wastes, livestock excrement and the like.
Description
Technical field:
The present invention relates to immobilized biomembrane that the immobilized method of anaerobe enrichment in a kind of anaerobic digester system, particularly anaerobic fermentation microorganism form by the mode of certainly growing, adsorbing and the immobilization carrier material method for the efficient anaerobic digestion of the organic domestic waste such as kitchen, fruits and vegetables of eating.
Background technology:
Since entering 21 century, along with the fast development of World Economics, industry and population, environmental pollution is on the rise, available natural resources tapered dosage, countries in the world turn to high value recycling from simple disposal to the processing of solid waste, wherein attach most importance to organic recycling, be subject to the attention of national governments and scholar's research.
Along with country " 12 " appearance of planning, energy-conserving and environment-protective are as first of seven great strategy industries, and National Environmental portion is also using Solid Waste Treatment and Resources as environmental protection emphasis direction.The features such as, organic content high, easy corruption high in conjunction with China's house refuse moisture content, the Domestic garbage treatment equipment, the process technologies that need exploitation to tally with the national condition.Anaerobic digestion techniques efficiency is high, and recycling rate is high, obvious to effects of energy saving and emission reduction, should support energetically to promote.
As the core of anaerobic digester system, anaerobic digestion reaction vessel will start and stable operation smoothly, and higher microbial biomass is a prerequisite.Biomass is activated sludge concentration, the too high or too low conversion ratio that all can affect substrate of activated sludge concentration.If activated sludge concentration is lower, sewage sludge feed rate of load condensate will raise, and probably can cause that mud exceedes feed loading phenomenon, thereby has influence on the stability of organic clearance and system operation; If activated sludge concentration is higher, the organic matter quantitative change that is equivalent to needs removal is few, will have influence on effective performance of microbiological treatment ability, even likely there will be microorganism " self-dissolving " phenomenon.Therefore, the activated sludge inoculum concentration of any system all need to be in suitable scope, is too high or too lowly all not suitable for.In addition, in anaerobic digester system, the activity of activated sludge, also the improvement of the speed to subsequent anaerobic digestion and efficiency has most important effect.In traditional anaerobic digestion process, conventionally adopt continuously or sequential fed mode, the inoculum in anaerobic digestion reaction vessel generally meeting runs off with output section, and therefore, anaerobic digester system needs constantly adapt to and stablize to newly entering raw material.In stable and the procedure of adaptation, the matrix of system consumption some is for thalli growth, therefore, and the problem such as traditional anaerobic digester system exists system stability poor, and transformation efficiency is low.Adopt immobilized cell technique, can effectively the microorganism in anaerobic digester system be retained in reactor, immobilization technology can ensure active microorganism quantity higher in anaerobic System simultaneously, thereby can obtain good anaerobic digestion efficiency.At present, the method for conventional cell fixation is combined techniques, and cross-linking method and investment three major types are mainly that microorganism is fixed on to the effigurate carrier inside of tool, mostly are common with gelled pill.But, the complicated component of the rubbish such as meal kitchen, fruits and vegetables.Traditional fixation support, is containing multivalent anions (phosphate, citrate, sulfate etc.) and the electrolyte (K at higher concentration
+, Na
+deng) unstable in solution, the easy deliquescing of carrier, breach, even dissolves; In traditional hybrid (CSTR) entirely or fluidized bed type (UASB) anaerobic digester system, easily there is stirring wound, the problem of fragmentation etc. aspect.In addition, in traditional process for fixation, the compact texture of carrier, this is unfavorable for the material Transfer between matrix and cell, and produces the release of gas; The existence of these problems limits the application and development of traditional immobilization technology in anaerobic fermentation system to a certain extent.
Literature search through prior art is found, Chinese Patent Application No. 200810116806.1, patent of invention title: a kind of process for fixation of anaerobic fermentation bacterial active sludge, publication number CN101319212A, within open day, be on December 10th, 2008 this content of the patent relate to by after solid carrier and concentrated activated sludge mixing and absorption, be placed in after crosslinking agent, dry, make immobilization particle further crosslinked and curing, acquisition can be for the anaerobic digestion fixation support of food and drink organic waste, stalk, plant's animal wastes and other debirs.From the example content of this patent, adopt acquisition immobilized active mud to obtain good ferment effect for anaerobic fermentation, but the longest run time is 60 days, the entirety time can not meet actual requirement of engineering, the fixation support simultaneously relating to need consume a certain amount of chemistry examination material in preparation technology, can increase to a certain extent anaerobic digestion and produce the cost of bionethanation system operation.Yang little Hong, Tian Shen, Zhao Jun, Cao Yali, Yang Xiushan. sarcina methanica expands to be cultivated and process for fixation [J]. China Environmental Science, 2002,22 (6): 530-533. has reported that a kind of immobilization methanogen is for the raw methanogenic method of anaerobic fermentation, its key step comprise with polyvinyl alcohol and sodium alginate in water-bath, dissolve cooling after, add filler and methanogen concentrate, after stirring, splash into the saturated BAS that contains 2% calcium chloride with syringe, make the particle that diameter is 1-4mm, after crosslinked 24h, for anaerobic digestion.Obtaining fixed cell carrier the longest service time is 50 days, can not meet equally engineering actual production demand completely.Guo Jing, Qiu Bo, Li Qingxue. Anaerobic Floating biofilm reactor is processed high concentrated organic wastewater [J]. Chinese water supply and drainage, 1999,15 (10): 53-55. report is a kind of by carrier material, carries out anaerobe and fixes, for the Anaerobic Digestion of waste water.The anaerobe biofilm relating to and fixing method are, first by aerobic microbiological Fast-propagation and generate the performance of polysaccharide, form one deck biomembrane base at filling surface, be then placed in anaerobic digestion reaction vessel, adhere to, grow for anaerobe, after this for anaerobic digestion.This kind utilizes carrier to carry out the mode of the fixing film forming of microorganism, in the Anaerobic Treatment process of organic wastewater, shows good capacity of resisting impact load, and the clearance of COD, more than 90%, has good stability.But this fado is applicable to the waste water that organic loading is less, and cannot assess for larger its performance of anaerobic fermentation system of meal kitchen fruits and vegetables rubbish organic load.In addition, this method has increased the incubation of aerobic film base, has increased the operating cost of this technology in Practical Project.
Summary of the invention:
The present invention is overcoming the deficiencies in the prior art, provides process comparatively simple, is suitable for the anaerobic digestion of high organic loading amount.By active microorganism being fixed on carrier material with the form of film from the mode of growing-adhering to of anaerobic digestion microorganism, and in system, provide the higher anaerobe system of activity of sufficient amount by self-sow-mode of adsorbing-coming off on fixing carrier.Be a kind of anaerobic digestion performance stability, efficiency is higher, the self-retaining technology of biological membrane that service life is grown.It,, in the technique of application high organic loading anaerobic digestion production biogas, is had to the anaerobism of raising transformation efficiency, the effect reducing production costs.
The present invention is achieved by the following technical solutions, and concrete steps of the present invention are as follows:
1). get biogas engineering or sewage treatment plant's anaerobic treatment pool bottom activated sludge, first remove larger particle and impurity through 20 mesh filter screen coarse filtration, then through 40 mesh filter screens, obtain activated sludge for the biomembranous film inoculum of building of self-retainingization;
2). get organic domestic waste and pulverize after homogenate as anaerobism matrix, for cultivating immobilized biomembrane and anaerobic fermentation through refiner;
3). by step 1) and step 2) middle activated sludge and the anaerobism matrix obtaining, according to volume ratio, 1:1 mixes, and injects continuous stirring formula anaerobic digestion reaction vessel;
4). select footpath height to be
three layers of open circles filler of column type polypropylene or polyethylene material, as biofilm formation and fixing carrier, load on this carrier in above-mentioned continuous stirring formula anaerobic digestion reaction vessel according to volume charge 25%-35% (volume ratio); The loading of filler is worn string with line from the center hole of above-mentioned filler, is wound on the paddle of above-mentioned continuous stirring formula anaerobic digestion reaction vessel with spiral fashion;
5) .. sealing continuous stirring formula anaerobic digestion reaction vessel, and pass into nitrogen replacement air;
6). starting paddle with 120 ± 10 revs/min of rotating speeds, within every 3 hours, stir once, stir 5min at every turn, is 35 DEG C of conditions in temperature, and organic load is 1-3.25gVSL
-1d
-1, carry out biomembrane self-retaining, move after 5-15 days, can be used for continuous anaerobic digestion.
Technical characterstic of the present invention: the startup stage that the present invention utilizing conventional anaerobic digestion, microorganism is growth performance in the procedure of adaptation, in conjunction with the stirring feature of stirring reactor, is fastened carrier on paddle, for the formation of anaerobic organism film and fixing; The method has reduced the oxygen consumption incubation of traditional biological film, and carrier is fixed, and has reduced biomembranous damage and loss, avoids anaerobic reactor carrier blocking pipe in continuous operation process simultaneously.The method technique is simple, and cost is lower, carrier long service life, and anaerobic digestion process is stable, and digestion effect is good, and continuous operating time is long.
Detailed description of the invention
Provide following embodiment in conjunction with the content of the inventive method:
Example 1 different-diameter carrier of the present invention is for self-retaining biomembrane
(1) material
1. activated sludge, takes from little Hong Men sewage treatment plant of Beijing anaerobic digester bottom mud;
2. carrier, three layers of hollow round polyethylene or polypropylene filler;
3. organic domestic waste: changing food waste, take from swill pond, Beijing University of Chemical Technology dining room;
4. anaerobic digestion reaction vessel: self-control 10L continuous type stirring-type lucite reactor;
(2) method
1. get activated sludge, first after after 20 orders and 40 mesh filter screens, for the biomembranous film inoculum of building of self-retainingization;
2. get changing food waste, pulverize homogenate through refiner, by immobilized biomembrane culture matrix and anaerobic fermentation matrix; Get respectively after the activated sludge and the mixing completely of 4L fermentation substrate after 4L filters, infusion enters in continuous stirring formula anaerobic digestion reaction vessel;
3. select diameter to be
15 and 25mm, height is three layers of open circles filler of 9mm column type polypropylene material as the carrier of biomembrane self-retaining, by this carrier according to 30% (volume ratio) of reactor charge for the biomembranous cultivation of self-retainingization;
4. be that 0.5-1mm nylon wire is worn string from the center hole of filler with diameter, by anaerobic digestion reaction vessel paddle rotation direction, after being wound on paddle with spirality, insert in the culture matrix reactor being equipped with, seal and pass into nitrogen replacement air 30min;
5. starting the paddle of reactor, with 120 ± 10 revs/min of rotating speeds, within every 3 hours, stir once, stir 5min at every turn, is 35 DEG C of conditions in temperature, taking organic load as 2.0gVSL
-1d
-1, carry out biomembrane self-retaining, move 10 days, complete anaerobic reactor biomembrane self-retaining process.
(3) sample result
After measured, diameter is
15 and the carrier filler of 25mm, after self-retaining, the microorganism fixed amount (dry weight) of unit mass carrier is respectively 195mgg
-1, 114mgg
-1and 74mgg
-1, be all greater than 50mgg
-1, can meet the requirement of continuous anaerobic digestion to thalline biomass.
Example 2 different carriers loading of the present invention is for self-retaining biomembrane
(1) material
1. activated sludge, takes from little Hong Men sewage treatment plant of Beijing anaerobic digester bottom mud;
2. carrier, three layers of hollow round polyethylene or polypropylene filler;
3. organic domestic waste: changing food waste, take from swill pond, Beijing University of Chemical Technology dining room;
4. anaerobic digestion reaction vessel: self-control 10L continuous type stirring-type lucite reactor;
(2) method
1. get activated sludge, first after after 20 orders and 40 mesh filter screens, for the biomembranous film inoculum of building of self-retainingization;
2. get changing food waste, after refiner is pulverized homogenate, as immobilized biomembrane culture matrix and anaerobic fermentation matrix; Get respectively after the activated sludge and the mixing completely of 4L fermentation substrate after 4L filters, infusion enters in continuous stirring formula anaerobic digestion reaction vessel;
3. select footpath height to be
three layers of open circles filler of column type polypropylene material are as biofilm formation and fixing carrier, and by this carrier, according to charge 25%, 30%, 35% (volume ratio) is for the biomembranous cultivation of self-retainingization;
4. be that 0.5-1mm nylon wire is worn string from the center hole of filler with diameter, by anaerobic digestion reaction vessel paddle rotation direction, after being wound on paddle with spirality, insert in the culture matrix reactor being equipped with, seal and pass into nitrogen replacement air 30min;
5. starting the paddle of reactor, with 120 ± 10 revs/min of rotating speeds, within every 3 hours, stir once, stir 5min at every turn, is 35 DEG C of conditions in temperature, and organic load is 2.0gVSL
-1d
-1, carry out biomembrane self-retaining, move 10 days, complete anaerobic reactor biomembrane self-retaining process.
(3) sample result
After measured, according to charge 25%, 30%, 35% (volume ratio) for the biomembranous cultivation of self-retainingization after, the microorganism fixed amount (dry weight) of unit mass carrier is respectively 155mgg
-1, 195mgg
-1, and 234mgg
-1.All can meet the requirement of continuous anaerobic digestion to thalline biomass.
Example 3 organic loading rate of the present invention is for self-retaining biomembrane
(1) material
1. activated sludge, takes from little Hong Men sewage treatment plant of Beijing anaerobic digester bottom mud;
2. carrier, three layers of hollow round polyethylene or polypropylene filler;
3. organic domestic waste: changing food waste is taken from swill pond, Beijing University of Chemical Technology dining room;
4. anaerobic digestion reaction vessel: self-control 10L continuous type stirring-type lucite reactor;
(2) method
1. get activated sludge, first after after 20 orders and 40 mesh filter screens, for the biomembranous film inoculum of building of self-retainingization;
2. get changing food waste, pulverize homogenate through refiner, be used as immobilized biomembrane culture matrix and anaerobic fermentation matrix; Get respectively after the activated sludge and the mixing completely of 4L fermentation substrate after 4L filters, infusion enters in continuous stirring formula anaerobic digestion reaction vessel;
3. select footpath height to be
three layers of open circles filler of column type polypropylene material are as biofilm formation and fixing carrier, by this carrier according to charge 30% (volume ratio) for the biomembranous cultivation of self-retainingization;
4. be that 0.5-1mm nylon wire is worn string from the center hole of filler with diameter, by anaerobic digestion reaction vessel paddle rotation direction, after being wound on paddle with spirality, insert in the culture matrix reactor being equipped with, seal and pass into nitrogen replacement air 30min;
5. starting the paddle of reactor, with 120 ± 10 revs/min of rotating speeds, within every 3 hours, stir once, stir 5min at every turn, is 35 DEG C of conditions in temperature, and organic load is 1gVSL
-1d
-1, 1.5gVSL
-1d
-1, 2gVSL
-1d
-1, 2.5gVSL
-1d
-1, 3gVSL
-1d
-1, 3.25gVSL
-1d
-1, carry out biomembrane self-retaining, move 10 days, complete anaerobic reactor biomembrane self-retaining process.
(3) sample result
After measured, organic load is 1gVSL
-1d
-1, 1.5gVSL
-1d
-1, 2gVSL
-1d
-1, 2.5gVSL
-1d
-1, 3gVSL
-1d
-1, 3.25gVSL
-1d
-1, to carry out after biomembrane self-retaining, the microorganism fixed amount (dry weight) of unit mass carrier is respectively 24mgg
-1, 47mgg
-1, 74.5mgg
-1, 142mgg
-1, 310mgg
-1, and 322mgg
-1.Except organic load is 1gVSL
-1d
-1and 1.5gVSL
-1d
-1biofilm amount be less than 50gVSL
-1d
-1outward, all the other all can meet the requirement of continuous anaerobic digestion to thalline biomass, if but use diameter less carrier, can effectively improve 2.8 times of the microorganism fixed amounts of unit mass carrier, therefore organic loading rate is at 1-3.25gVSL
-1d
-1in scope, all can realize the normal operation of anaerobic digestion.
The example 4 self-retaining biomembrane time of the present invention
(1) material
1. activated sludge, takes from little Hong Men sewage treatment plant of Beijing anaerobic digester bottom mud;
2. carrier, three layers of hollow round polyethylene or polypropylene filler;
3. organic domestic waste: changing food waste is taken from swill pond, Beijing University of Chemical Technology dining room;
4. anaerobic digestion reaction vessel: self-control 10L continuous type stirring-type lucite reactor;
(2) method
1. get activated sludge, first after after 20 orders and 40 mesh filter screens, for the biomembranous film inoculum of building of self-retainingization;
2. get changing food waste, pulverize homogenate through refiner, be used as immobilized biomembrane culture matrix and anaerobic fermentation matrix; Get respectively after the activated sludge and the mixing completely of 4L fermentation substrate after 4L filters, infusion enters in continuous stirring formula anaerobic digestion reaction vessel;
3. select footpath height to be
three layers of open circles filler of column type polypropylene material are as biofilm formation and fixing carrier, by this carrier according to charge 30% (volume ratio) for the biomembranous cultivation of self-retainingization;
4. be that 0.5-1mm nylon wire is worn string from the center hole of filler with diameter, by anaerobic digestion reaction vessel paddle rotation direction, after being wound on paddle with spirality, insert in the culture matrix reactor being equipped with, seal and pass into nitrogen replacement air 30min;
5. starting the paddle of reactor, with 120 ± 10 revs/min of rotating speeds, within every 3 hours, stir once, stir 5min at every turn, is 35 DEG C of conditions in temperature, and organic load is 2gVSL
-1d
-1, carry out biomembrane self-retaining, move respectively 5 days, 10 days and 15 days, carry out anaerobic reactor biomembrane self-retaining process.
(3) sample result
After measured, move 5 days, within 10 days and 15 days, carry out after biomembrane self-retaining, the microorganism fixed amount (dry weight) of unit mass carrier is respectively 63mgg
-1, 195mgg
-1, 217mgg
-1.All can meet the requirement of continuous anaerobic digestion to thalline biomass.
Example 5 the present invention are for fruit, vegetables anaerobic digestion of refuse
(1) material
1. activated sludge, takes from little Hong Men sewage treatment plant of Beijing anaerobic digester bottom mud;
2. carrier, footpath height is
three layers of open circles filler of column type polypropylene material;
3. organic domestic waste: really, vegetables rubbish takes from behind Beijing University of Chemical Technology dining room processing link before kitchen;
4. anaerobic digestion reaction vessel: self-control 10L anaerobic sequencing batch lucite reactor (having paddle);
(2) method
1. get activated sludge, first after after 20 orders and 40 mesh filter screens, build film inoculum for immobilized biomembrane;
2. get fruit, vegetables rubbish, pulverize homogenate through refiner, be used as immobilized biomembrane culture matrix and anaerobic fermentation matrix; Get respectively after the activated sludge and the mixing completely of 4L fermentation substrate after 4L filters, infusion enters in batch-type anaerobic digestion reaction vessel;
3. select footpath height to be
three layers of open circles filler of column type polypropylene material are as biofilm formation and fixing carrier, by this carrier according to charge 30% (volume ratio) for the biomembranous cultivation of self-retainingization;
4. be that 0.5-1mm nylon wire is worn string from the center hole of filler with diameter, by anaerobic digestion reaction vessel paddle rotation direction, after being wound on paddle with spirality, insert in the culture matrix reactor being equipped with, seal and pass into nitrogen replacement air 30min;
5. starting the paddle of reactor, with 120 ± 10 revs/min of rotating speeds, within every 3 hours, stir once, stir 5min at every turn, is 35 DEG C of conditions in temperature, taking organic load as 1gVSL
-1d
-1start and carry out biomembrane self-retaining, move 15 days.
6 after this, is 1.5gVSL respectively according to organic loading rate
-1d
-1(hydraulic detention time=30d), 2gVSL
-1d
-1(hydraulic detention time=20d), 2.5gVSL
-1d
-1(hydraulic detention time=20d), 2.75gVSL
-1d
-1(hydraulic detention time=20d), 3gVSL
-1d
-1(hydraulic detention time=20d), 3.25gVSL
-1d
-1(hydraulic detention time=20d), 3.5gVSL
-1d
-1(hydraulic detention time=20d) promotes organic loading, carries out the anaerobic digestion of fruit, vegetables rubbish, altogether moves 260 days;
(3) sample result
Result by the biogas daily output and methane content in mensuration process is as shown in table 1 below.
Table 1 self-retaining biomembrane is for fruits and vegetables rubbish anaerobic digestion gas production performance under different load
Table 2 fruit, vegetables rubbish self-retaining biological membrane anaerobic digest and contrast without self-retaining biological membrane anaerobic digestic property
Note: the coefficient of variation is less, system discreteness is just less, and system operation is more stable;
Visible, under underrun, there is the gas generation property of self-retaining biological membrane anaerobic digestion to there is no significant raising, but along with the rising of load, there is the biomembranous anaerobic digestion gas production amount of self-retainingization to exceed 10% left and right than without the biomembranous anaerobic digestion gas production amount of self-retainingization, and TS, VS clearance are higher, operation stability is better.Visible, self-retaining technology of biological membrane is more suitable for the anaerobic digestion of high organic loading rate.
Example 6 the present invention are for fruits and vegetables, meal kitchen composting anaerobic digestion
(1) material
1. activated sludge, takes from little Hong Men sewage treatment plant of Beijing anaerobic digester bottom mud;
2. carrier, footpath height is
three layers of open circles filler of column type polypropylene material;
3. organic domestic waste: fruits and vegetables rubbish is taken from behind Beijing University of Chemical Technology dining room processing link before kitchen, and changing food waste is taken from swill pond, Beijing University of Chemical Technology dining room;
4. anaerobic digestion reaction vessel: self-control 10L anaerobic sequencing batch lucite reactor (having paddle);
(2) method
1. get activated sludge, first after after 20 orders and 40 mesh filter screens, build film inoculum for immobilized biomembrane;
2. get respectively fruit, vegetables rubbish and changing food waste, pulverize homogenate through refiner, 5:8 ratio mixes by volume, for immobilized biomembrane culture matrix and anaerobic fermentation matrix; Get respectively after the activated sludge and the mixing completely of 4L mixed culture fermentation matrix after 4L filters, infusion enters in batch-type anaerobic digestion reaction vessel;
3. select footpath height to be
three layers of open circles filler of column type polypropylene material are as biofilm formation and fixing carrier, by this carrier according to charge 30% (volume ratio) for the biomembranous cultivation of self-retainingization;
4. be that 0.5-1mm nylon wire is worn string from the center hole of filler with diameter, by anaerobic digestion reaction vessel paddle rotation direction, after being wound on paddle by screw type, insert in the culture matrix reactor being equipped with, seal and pass into nitrogen replacement air 30min;
5. starting the paddle of reactor, with 120 ± 10 revs/min of rotating speeds, within every 3 hours, stir once, stir 5min at every turn, is 35 DEG C of conditions in temperature, taking organic load as 1gVSL
-1d
-1start and carry out biomembrane self-retaining, move 15 days.
6 after this, and organic loading rate is according to 1.5gVSL
-1d
-1(hydraulic detention time=30d), 2gVSL
-1d
-1(hydraulic detention time=30d),, 3gVSL
-1d
-1(hydraulic detention time=20d), 3.25gVSL
-1d
-1(hydraulic detention time=20d) and 3.5gVSL
-1d
-1(hydraulic detention time=20d) improves constantly feed loading and adjusts Hydraulic retention time, finally fixes HRT=20d, until system acidifying is serious, and gas generation property degradation, system cannot continue operation and finish anaerobic digestion.
(3) sample result
Result by biogas output and methane content in mensuration process is as following table 3.
Table 3 self-retaining biomembrane is for fruit, vegetables and meal kitchen composting anaerobic digestion gas production performance under different load
Calculate by measurement result, for having or not, self-retaining biological membrane anaerobic digestion fruit, vegetables and meal kitchen composting daily output tolerance stability are more as shown in table 4,
Table 4 fruit, vegetables and meal kitchen composting have or not the contrast of self-retaining biological membrane anaerobic digestion daily output tolerance stability
Note: standard deviation is less, gas generation property is more stable
By measuring, more as shown in table 5 for fruits and vegetables and meal kitchen composting anaerobic digestion performance for having or not self-retaining biomembrane,
The contrast of table 5 volatile solid degradation rate
Can find out that by experimental result above carrying out self-retaining biofilm system can make homogenous anaerobic digestion, at 1-3.5gVSL
-1d
-1the situation of organic loading rate, gas generation property improves 1.9%-21.1%.Can improve degradation rate and the aerogenesis stability of monophase system to VS simultaneously.
Claims (1)
1. for a self-retaining biological membrane anaerobic digestion method for the kitchen of eating, fruits and vegetables rubbish, it is characterized in that step is as follows:
1). get biogas engineering or sewage treatment plant's anaerobic treatment pool bottom activated sludge, first remove larger particle and impurity through 20 mesh filter screen coarse filtration, then through 40 mesh filter screens, obtain activated sludge for the biomembranous film inoculum of building of self-retainingization;
2). get organic domestic waste and pulverize after homogenate as anaerobism matrix, for cultivating immobilized biomembrane and anaerobic fermentation through refiner;
3). by step 1) and step 2) middle activated sludge and the anaerobism matrix obtaining, according to volume ratio, 1:1 mixes, and injects continuous stirring formula anaerobic digestion reaction vessel;
4). select footpath height to be
three layers of open circles filler of column type polypropylene or polyethylene material, as biofilm formation and fixing carrier, load on this carrier in above-mentioned continuous stirring formula anaerobic digestion reaction vessel according to volume charge 25%-35%; The loading of filler is worn string with line from the center hole of above-mentioned filler, is wound on the paddle of above-mentioned continuous stirring formula anaerobic digestion reaction vessel with spiral fashion;
5) .. sealing continuous stirring formula anaerobic digestion reaction vessel, and pass into nitrogen replacement air;
6). starting paddle with 120 ± 10 revs/min of rotating speeds, within every 3 hours, stir once, stir 5min at every turn, is 35 DEG C of conditions in temperature, and organic load is 1-3.25gVSL
-1d
-1, carry out biomembrane self-retaining, move after 5-15 days, can be used for continuous anaerobic digestion.
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| CN105016801B (en) * | 2015-07-03 | 2018-04-17 | 上海工程技术大学 | Waste of vegetables and fruits integrated processing technique |
| CN113695356A (en) * | 2021-08-26 | 2021-11-26 | 同济大学 | Reactor for reinforcing anaerobic digestion capability of organic solid waste by using biological filler |
| CN116116874A (en) * | 2023-02-23 | 2023-05-16 | 昆明理工大学 | Method for treating kitchen waste by agricultural and forestry waste in cooperation with biological evaporation |
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| CN102642926A (en) * | 2012-04-28 | 2012-08-22 | 哈尔滨工业大学水资源国家工程研究中心有限公司 | Sewage treatment system and sewage treatment method of anaerobic fluidized bed-micro aerobic membrane bioreactor |
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| JP3234139B2 (en) * | 1995-10-24 | 2001-12-04 | 株式会社荏原製作所 | Biological treatment method and equipment for sewage |
| JP2000015278A (en) * | 1998-07-07 | 2000-01-18 | Mihara Carbon Kk | Microorganism supporting carrier and method for treating drainage using it |
| JP3698419B2 (en) * | 2001-06-08 | 2005-09-21 | 株式会社荏原製作所 | Organic sludge reduction method and apparatus |
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| HU205589B (en) * | 1985-07-02 | 1992-05-28 | Imre Gyulavari | Apparatus for purifying waste waters first of all communal, agricultural or industrial waste waters with organic impurities |
| CN101062807A (en) * | 2007-05-25 | 2007-10-31 | 大连理工大学 | Intensified anti-nitrated phosphorous-removal sequencing batch membrane bioreactor technique |
| CN101817583A (en) * | 2009-02-20 | 2010-09-01 | 重庆文理学院 | Wall-hanging batch biofilm reactor |
| CN102642926A (en) * | 2012-04-28 | 2012-08-22 | 哈尔滨工业大学水资源国家工程研究中心有限公司 | Sewage treatment system and sewage treatment method of anaerobic fluidized bed-micro aerobic membrane bioreactor |
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