CN102304548B - Method and device for separating and recovering oil coupled with restaurant and kitchen garbage biogas fermentation - Google Patents

Method and device for separating and recovering oil coupled with restaurant and kitchen garbage biogas fermentation Download PDF

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Publication number
CN102304548B
CN102304548B CN2011101595415A CN201110159541A CN102304548B CN 102304548 B CN102304548 B CN 102304548B CN 2011101595415 A CN2011101595415 A CN 2011101595415A CN 201110159541 A CN201110159541 A CN 201110159541A CN 102304548 B CN102304548 B CN 102304548B
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oil
biogas fermentation
grease
water
biogas
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CN102304548A (en
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李�东
甄峰
孙永明
孔晓英
李连华
袁振宏
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Guangzhou Institute of Energy Conversion of CAS
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    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12MAPPARATUS 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
    • C12M21/00Bioreactors or fermenters specially adapted for specific uses
    • C12M21/04Bioreactors or fermenters specially adapted for specific uses for producing gas, e.g. biogas
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12MAPPARATUS 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
    • C12M27/00Means for mixing, agitating or circulating fluids in the vessel
    • C12M27/02Stirrer or mobile mixing elements
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12MAPPARATUS 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
    • C12M47/00Means for after-treatment of the produced biomass or of the fermentation or metabolic products, e.g. storage of biomass
    • C12M47/10Separation or concentration of fermentation products
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/30Fuel from waste, e.g. synthetic alcohol or diesel
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/40Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse

Abstract

The invention provides a method and a device for separating and recovering restaurant and kitchen garbage biogas fermentation coupling oil. The method comprises the following steps: 1). removing the impurities of restaurant and kitchen garbage and breaking the restaurant and kitchen garbage; 2). inoculating and adjusting the concentration of raw materials; 3). separating the biogas fermentation coupling oil; and 4). separating the oil gravity. According to the method, the restaurant and kitchen garbage biogas fermentation and the restaurant and kitchen garbage oil separation are coupled together, the continuous decomposition and hydrolysis action of microorganisms and enzymes to restaurant and kitchen garbage solid organic particles is fully utilized for prompting oil inside a solid phase to be released into water to form dispersed oil and emulsified oil; and biogas micro-bubbles generated by the biogas fermentation are fully utilized for converting the dispersed oil and the emulsified oil in water into floating oil so as to reduce the energy consumption of the restaurant and kitchen garbage oil separation. The device is an integrated reactor for biogas fermentation coupling oil separation; and an oil scraper is embedded inside the biogas fermentation reactor to simplify and reduce the investment cost of equipment.

Description

The method and apparatus of changing food waste biogas fermentation coupling grease Separation and Recovery
Technical field
The invention belongs to organic waste treatment and development of clean energy field, be specifically related to a kind of method and apparatus of changing food waste biogas fermentation coupling grease Separation and Recovery.
Technical background
The existence of changing food waste brings very large pressure for the main processing means (landfill and burning) of present domestic waste.For example, higher organic content causes producing the greenhouse gases methane of a large amount of meeting polluted underground waters and edaphic percolate and unordered discharging in the landfill process; When causing burning disposal, higher moisture content need to add a large amount of extra auxiliary fuels.The characteristics of changing food waste are: moisture content is high, moisture content 〉=70%; Organic content is high, organic content in the dry-matter 〉=90%; Fat content is high, and fat content about 30% in the dry-matter.For above characteristics, changing food waste is carried out the comprehensive utilization of resource utilization and energy become a kind of development trend.For high moisture content and high organic content, can select the biogas fermentation processing mode, in treating refuse, can obtain after the natural pond slag is suitably processed, can also obtain organic fertilizer or feed take methane as main clean reproducible energy.For high fat content, the grease in the changing food waste can be carried out Separation and Recovery, as the oil and fat chemical raw material or for the production of biofuel.Because the biogas fermentation cycle of grease is longer, at least need 60 days, and the biogas fermentation cycle of other organic matter in the changing food waste (carbohydrate, starch, robust fibre, albumen) at most only needs 25 days, therefore the existence of grease can reduce changing food waste biogas fermentation efficient (Li Dong etc. greatly, organic waste component mesophilic anaerobic digestion produces methane-powered research. solar energy journal, 2010,31 (3), 385-390).In addition, the existence meeting of grease to the changing food waste biogas fermentation produce certain restraining effect (Li Dong etc., the methane ability is produced in the anaerobic digestion of each component of municipal domestic organic refuse. ACTA Scientiae Circumstantiae, 2008,28 (11), 2284-2290).Therefore, suggestion is carried out grease to changing food waste and is separated and the biogas fermentation comprehensive treating process, and in fact the added value of oil and fat chemical product or biofuel is higher than the added value of biogas.
Grease in the changing food waste exists with 5 kinds of forms such as floating oil, dispersed oil, oil in water emulsion, dissolving oil, solid phase internal grease.Wherein, floating elaioleucite footpath is larger, generally greater than 100 μ m, can comparatively fast float after leaving standstill, and flies at the water surface with the form of external phase oil film or oil reservoir, can remove with general gravity separation equipment.Dispersed oil with little oil droplet shape suspended dispersed in liquid phase, oil droplet size is between 25 ~ 100 μ m, when there is electric charge in the oil meter face or is subject to mechanical external force, oil droplet is comparatively stable, otherwise the oil droplet of disperse phase is then unstable, leave standstill just to assemble after for some time and become on the larger oil droplet and float to the water surface, the oil of this state is also more easily removed.When having tensio-active agent, grease is milkiness shape or emulsification shape in water, forms the oil in water emulsion of oil droplet size between 0.1 ~ 25 μ m, and the emulsification oil separating is difficulty comparatively.Dissolving oil is scattered in aqueous phase with molecularity or chemical state and forms ultra-fine oil droplet, and particle diameter is below several nanometers, and oil and water form highly stable homogeneous system, can't remove with general physical method.But since the solubleness of oil in water very little (5 ~ 15mg/L), so the ratio in water only is about 0.5%.The solid phase internal grease is combined closely mainly with solid-state form and changing food waste solid phase particles, almost can not directly separate.Grease in the changing food waste mainly exists in the mode of solid phase internal grease and floating oil, and other three kinds of existing waies are less, and wherein the solid phase internal grease accounts for more than 80% of total fat content, and floating oil accounts for 10% ~ 15%, the grease less than 5% of all the other existing waies.
The key that kitchen garbage grease separates is the solid phase internal grease is discharged into liquid phase, reduces the grease separating difficulty, can adopt coalescence, little By Bubble-floating Method etc. to be converted into floating oil for the dispersed oil in the liquid phase, oil in water emulsion, then carries out gravity separation.Chinese patent (the method for the remaining comprehensive garbage disposal recycling of meal, publication number CN101130194A, a day 2008-02-27 is disclosed) and document (Ren Lianhai etc., the influence factor of the liquefaction of changing food waste solid phase grease and Separation and Recovery. Tsing-Hua University's journal (natural science edition), 2009,49(3), 387-390) disclose a kind of wet heat treatment method of high temperature steaming, impelled the solid phase internal grease in the changing food waste to discharge in the liquid phase.Chinese patent (kitchen garbage, waste-water grease integral separation device and method; publication number CN101215020A; an open day 2008-07-09) disclose the grease separation method of a kind of little By Bubble-floating Method and coalescence coupling, be used for dispersed oil, the oil in water emulsion of kitchen garbage, waste-water are converted into floating oil.
Yet the wet heat treatment method need to be heated to changing food waste the high temperature about 150 ℃, and process energy consumption is higher; Little By Bubble-floating Method needs microbubble generator, also needs energy consumption; And coalescence not only needs the coarse filler, increases equipment cost, also needs to control strict processing condition to guarantee oil recovery efficient.
Summary of the invention
Yet the wet heat treatment method need to be heated to changing food waste the high temperature about 150 ℃, and process energy consumption is higher; Little By Bubble-floating Method needs microbubble generator, also needs energy consumption; And coalescence not only needs the coarse filler, increases equipment cost, also needs to control strict processing condition to guarantee oil recovery efficient.
The object of the invention is to overcome deficiency of the prior art, a kind of method and apparatus of changing food waste biogas fermentation coupling grease Separation and Recovery is provided, realize the synchronous processing of changing food waste biogas fermentation and oil recovery, and reduce the energy consumption of oil recovery.
The method of changing food waste biogas fermentation coupling grease Separation and Recovery of the present invention as shown in Figure 1, may further comprise the steps:
(1) the changing food waste removal of impurities is broken: get changing food waste and pick the removal oversize material, as carrying out break process behind bone, bottle cap, chopsticks, toothpick, packing bag, the discarded tablecloth, broken rear raw material particle size is less than 5mm;
(2) inoculation is regulated with material concentration: add anaerobic activated sludge from methane-generating pit as the biogas fermentation inoculum, add water or regulate the solid masses concentration of mixing raw material less than 6% from the waste water of grease gravity separation step;
(3) the biogas fermentation coupling grease separates: above-mentioned mixing raw material is put into reactor carry out synchronous biogas fermentation and separate with grease, the temperature of control biogas fermentation is 30 ℃ ~ 60 ℃, be preferably 37 ℃ or 55 ℃, the pH value is 6.8 ~ 7.5, and hydraulic detention time is 15 ~ 25 days; In reactor, solid matter progressively discharges and is distributed in the water under the microorganism that changing food waste SOLID ORGANIC particle contains in the biogas fermentation inoculum and the continuous decomposition hydrolytic action of extracellular enzyme, the solid phase internal grease also is discharged into and forms dispersed oil, oil in water emulsion in the water, the a large amount of biogas microbubbles that utilize biogas fermentation to produce, rely on surface tension effects that dispersed oil and oil in water emulsion are adhered on the microbubble, dispersed oil and oil in water emulsion form floating oil in company with the microbubble come-up; To isolate take floating oil as main oil-water mixture;
(4) grease gravity separation: utilize profit density difference and profit uncompatibility, adopt the grease in traditional gravity separation method refiltered oil water mixture, remaining waste water returns the solid masses concentration that the raw material regulating step is used for regulating raw material.
As improvement of the present invention, can be processed into organic fertilizer or feed with finishing the fermentation resistates that biogas fermentation separates with grease.
The innovation of the inventive method is, changing food waste biogas fermentation and kitchen garbage grease separation coupling are in the same place, taking full advantage of in the marsh gas fermentation processes microorganism and enzyme impels the solid phase internal grease to be discharged into and forms dispersed oil and oil in water emulsion in the water the continuous decomposition hydrolytic action of changing food waste SOLID ORGANIC particle; Take full advantage of the biogas microbubble that biogas fermentation produces, the dispersed oil in the water and oil in water emulsion are converted into floating oil, can reduce the energy consumption that kitchen garbage grease separates by the inventive method.
The method of Chinese meal of the present invention kitchen marsh gas of rubbish fermentation coupling grease Separation and Recovery, its core is biogas fermentation coupling grease separating step.The invention allows for the biogas fermentation coupling fat separator device of being convenient to realize this step, this device is cylindrical tank, be provided with opening for feed, discharge port, slag-drip opening, oil discharge outlet, methane outlet, stir shaft, motor, the oil discharge outlet position is higher than the discharge port position, arrange near the oil discharge outlet the inner tank wall and block oiled-plate method, fixing oil scraping plate on the stir shaft, the terminal fixedly rubber contact of oil scraping plate, oil scraping plate, the rubber contact, oil discharge outlet, block oiled-plate method at the same level height, oil discharge outlet and oil exit pipe are communicated with by valve, twine the heating zone at cylindrical tank outer wall corresponding to oil layer height location and are bonded at the grease that solidifies on the inner tank wall with regular thawing.
Further specify as of the present invention, in the stir shaft rotary course, the rubber contact should be run into and blocks oiled-plate method.
As a kind of improvement of the present invention, for ease of observing, at above-mentioned cylindrical tank form is set, form position and oil layer are at sustained height.
As a kind of improvement of the present invention, twine the heating zone at the oil exit pipe outer wall, in order to melt the grease that solidifies that is bonded on the oil exit pipe inwall.
As a kind of improvement of the present invention, for ease of technological operation, between opening for feed, discharge port, slag-drip opening, methane outlet and the tank body valve is set.
The innovation of apparatus of the present invention is, oil-scraping device is embedded in the biogas fermentation inside reactor, need not to increase independent kitchen garbage grease tripping device, such as high temperature steaming tank and little air flotation oil removal tank, simplifies technique and reduces equipment investment cost.
Description of drawings
Fig. 1 is the technological process synoptic diagram of the inventive method
Fig. 2 is the sectional view of apparatus of the present invention
Fig. 3 is the oblique sectional view of apparatus of the present invention
Fig. 4 is the operation synoptic diagram of oil-scraping device in apparatus of the present invention
Description of reference numerals: the 1-opening for feed, the 2-discharge port, the 3-slag-drip opening, the 4-oil discharge outlet, the 5-oil exit pipe, the 6-motor, the 7-stir shaft, the 8-oil scraping plate, 9-rubber contact, 10-blocks oiled-plate method, 11-methane outlet, 12-heating zone, 13-valve
Embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
Such as Fig. 2, shown in 3, present embodiment device (biogas fermentation coupling grease isolation integral reactor) is cylindrical tank, be provided with opening for feed 1, discharge port 2, slag-drip opening 3, oil discharge outlet 4, methane outlet 11, stir shaft 7, motor 6, oil discharge outlet 4 positions are higher than discharge port 2 positions, arrange near the oil discharge outlet 4 the inner tank wall and block oiled-plate method 10, fixing oil scraping plate 8 on the stir shaft, oil scraping plate 8 terminal fixedly rubber contacts 9, oil scraping plate 8, rubber contact 9, oil discharge outlet 4, block oiled-plate method 10 at the same level height, in stir shaft 7 rotary courses, rubber contact 9 should be run into and blocks oiled-plate method 10.Oil discharge outlet 4 and oil exit pipe 5 is communicated with by valve 13, twines heating zone 12 at cylindrical tank outer wall corresponding to oil layer height location and is bonded at the grease that solidifies on the inner tank wall with regular thawing.
At above-mentioned cylindrical tank form is set, form position and oil layer are at sustained height.
For ease of technological operation, between opening for feed 1, discharge port 2, slag-drip opening 3, methane outlet 11 and tank body, valve can be set.
Embodiment 1:
Collect changing food waste pick remove bulk bone, bottle cap, chopsticks, toothpick, packing bag, discarded tablecloth after, adopt machine for disintegrating kitchen refuse with raw material crushing to particle diameter 5mm; Interpolation, and is added water and is regulated the solid masses concentration of mixing raw material less than 6% as the biogas fermentation inoculum from the anaerobic activated sludge of methane-generating pit; Above-mentioned mixing raw material pumped into from opening for feed 1 carry out synchronous biogas fermentation the reactor and separate with grease, observe the liquid level of control mixing raw material to the oil discharge outlet position height by form, the temperature of control biogas fermentation is 37 ℃, and the pH value is 6.8 ~ 7.5, and hydraulic detention time is 25 days; In reactor, solid matter progressively discharges and is distributed in the water under the continuous decomposition hydrolytic action of changing food waste SOLID ORGANIC particle lytic enzyme outside methane fermentating microorganism and born of the same parents, the solid phase internal grease also is discharged into and forms dispersed oil, oil in water emulsion in the water, at this moment, the a large amount of biogas microbubbles that utilize biogas fermentation to produce, dispersed oil and oil in water emulsion together floated in company with the biogas microbubble forms floating oil, and biogas is then discharged from methane outlet 11.As shown in Figure 4, when driving stir shafts 7, motor 6 turns clockwise when fermentation raw material stirred, oil scraping plate 8 and rubber contact 9 also turn clockwise thereupon, floating oil is in the pushing effect of oil scraping plate 8 and rubber contact 9 and block under the barrier effect of oiled-plate method 10 and gather oil discharge outlet 4 places, under action of gravity take floating oil as main oil-water mixture from oil discharge outlet 4, oil exit pipe 5 discharges.It is worth mentioning that when motor 6 is opened, need open simultaneously valve 13.Reclaim grease take floating oil as main oil-water mixture through gravity separation equipment; Finish the fermentation resistates that biogas fermentation separates with grease and discharge from discharge port 2, use as organic fertilizer; Regularly connect heating zone 12 power supplys and heat to melt the grease that solidifies that sticks on reactor tank body inwall and the oil exit pipe inwall; The regular inorganic substance such as broken bone from slag-drip opening 3 purge reactors bottom.
Embodiment 2
Collect changing food waste pick remove bulk bone, bottle cap, chopsticks, toothpick, packing bag, discarded tablecloth after, adopt machine for disintegrating kitchen refuse with raw material crushing to particle diameter 5mm; Interpolation, and is added from the waste water of grease gravity separation step and is regulated the solid masses concentration of mixing raw material less than 6% as the biogas fermentation inoculum from the anaerobic activated sludge of methane-generating pit; Above-mentioned mixing raw material pumped into from opening for feed 1 carry out synchronous biogas fermentation the biogas fermentation coupling grease isolation integral reactor and separate with grease, observe the liquid level of control mixing raw material to the oil discharge outlet position height by form, the temperature of control biogas fermentation is 55 ℃, the pH value is 6.8~7.5, and hydraulic detention time is 15 days; In reactor, solid matter progressively discharges and is distributed in the water under the continuous decomposition hydrolytic action of changing food waste SOLID ORGANIC particle lytic enzyme outside methane fermentating microorganism and born of the same parents, the solid phase internal grease also is discharged into and forms dispersed oil, oil in water emulsion in the water, at this moment, the a large amount of biogas microbubbles that utilize biogas fermentation to produce, dispersed oil and oil in water emulsion together floated in company with the biogas microbubble forms floating oil, and biogas is then discharged from methane outlet 11; When driving stir shafts 7, motor 6 turns clockwise when fermentation raw material stirred, oil scraping plate 8 and rubber contact 9 also turn clockwise thereupon, floating oil is in the pushing effect of oil scraping plate 8 and rubber contact 9 and block under the barrier effect of oiled-plate method 10 and gather oil discharge outlet 4 places, oil-water mixture take floating oil as the master under action of gravity is discharged from oil discharge outlet 4, oil exit pipe 5, it is worth mentioning that when motor 6 is opened, need open simultaneously valve 13; Reclaim grease take floating oil as main oil-water mixture through gravity separation equipment; Finish the fermentation resistates that biogas fermentation separates with grease and discharge from discharge port 2, use as organic fertilizer; Regularly connect the heating zone power supply and heat to melt the grease that solidifies that sticks on reactor tank body inwall and the oil exit pipe inwall; The regular inorganic substance such as broken bone from slag-drip opening 3 purge reactors bottom.
At last, it is also to be noted that what more than enumerate only is specific embodiments of the invention.Obviously, the invention is not restricted to above examples of implementation, many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention all should be thought protection scope of the present invention.

Claims (7)

1. the method for a changing food waste biogas fermentation coupling grease Separation and Recovery is characterized in that may further comprise the steps:
(1) the changing food waste removal of impurities is broken: get and carry out break process after changing food waste is picked the removal oversize material, broken rear raw material particle size is less than 5mm;
(2) inoculation is regulated with material concentration: add anaerobic activated sludge from methane-generating pit as the biogas fermentation inoculum, add water or regulate the solid masses concentration of mixing raw material less than 6% from the waste water of grease gravity separation step;
(3) the biogas fermentation coupling grease separates: above-mentioned mixing raw material is put into reactor carry out synchronous biogas fermentation and separates with grease, the temperature of controlling biogas fermentation is 30 ℃ ~ 60 ℃, and the pH value is 6.8 ~ 7.5, and hydraulic detention time is 15 ~ 25 days; In reactor, changing food waste SOLID ORGANIC particle solid matter under the continuous decomposition hydrolytic action of microorganism and extracellular enzyme progressively discharges and is distributed in the water, the solid phase internal grease also is discharged into and forms dispersed oil, oil in water emulsion in the water, the a large amount of biogas microbubbles that utilize biogas fermentation to produce, rely on surface tension effects that dispersed oil and oil in water emulsion are adhered on the microbubble, dispersed oil and oil in water emulsion form floating oil in company with the microbubble come-up; To isolate take floating oil as main oil-water mixture;
(4) grease gravity separation: utilize profit density difference and profit uncompatibility, adopt the grease in traditional gravity separation method refiltered oil water mixture, remaining waste water returns the solid masses concentration that the raw material regulating step is used for regulating raw material.
2. the method for changing food waste biogas fermentation coupling grease Separation and Recovery as claimed in claim 1 characterized by further comprising following steps:
(5) the fermentation resistates that biogas fermentation separates with grease be will finish and organic fertilizer or feed will be processed into.
3. biogas fermentation coupling fat separator device, this device is cylindrical tank, be provided with opening for feed, discharge port, slag-drip opening, methane outlet, stir shaft, motor, it is characterized in that: described tank body is provided with oil discharge outlet, the oil discharge outlet position is higher than the discharge port position, arrange near the oil discharge outlet the inner tank wall and block oiled-plate method, fixing oil scraping plate on the stir shaft, the terminal fixedly rubber contact of oil scraping plate, oil scraping plate, rubber contact, oil discharge outlet, block oiled-plate method at the same level height, in the stir shaft rotary course, the rubber contact should be run into and blocks oiled-plate method; Oil discharge outlet and oil exit pipe are communicated with by valve.
4. biogas fermentation coupling fat separator device as claimed in claim 3 is characterized in that: twine the heating zone at cylindrical tank outer wall corresponding to oil layer height location and be bonded at the grease that solidifies on the inner tank wall with regular thawing.
5. such as claim 3 or 4 described biogas fermentation coupling fat separator device, it is characterized in that: on the described cylindrical tank form is set, form position and oil layer are at sustained height.
6. such as claim 3 or 4 described biogas fermentation coupling fat separator device, it is characterized in that: twine the heating zone at the oil exit pipe outer wall, in order to melt the grease that solidifies that is bonded on the oil exit pipe inwall.
7. such as claim 3 or 4 described biogas fermentation coupling fat separator device, it is characterized in that: between opening for feed, discharge port, slag-drip opening, methane outlet and the tank body valve is set.
CN2011101595415A 2011-06-15 2011-06-15 Method and device for separating and recovering oil coupled with restaurant and kitchen garbage biogas fermentation Active CN102304548B (en)

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CN107699358A (en) * 2017-11-08 2018-02-16 常州文诺纺织品有限公司 A kind of method from kitchen garbage separation waste oil
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