CN112741047A - Deep recycling treatment method for kitchen waste - Google Patents
Deep recycling treatment method for kitchen waste Download PDFInfo
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- CN112741047A CN112741047A CN202011601573.1A CN202011601573A CN112741047A CN 112741047 A CN112741047 A CN 112741047A CN 202011601573 A CN202011601573 A CN 202011601573A CN 112741047 A CN112741047 A CN 112741047A
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- 239000010806 kitchen waste Substances 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000004064 recycling Methods 0.000 title claims abstract description 22
- 241000709785 Hermetia illucens Species 0.000 claims abstract description 62
- 238000009395 breeding Methods 0.000 claims abstract description 53
- 230000001488 breeding effect Effects 0.000 claims abstract description 53
- 239000002351 wastewater Substances 0.000 claims abstract description 31
- 241000238631 Hexapoda Species 0.000 claims abstract description 28
- 239000010779 crude oil Substances 0.000 claims abstract description 26
- 210000003608 fece Anatomy 0.000 claims abstract description 20
- 239000003921 oil Substances 0.000 claims abstract description 19
- 238000005191 phase separation Methods 0.000 claims abstract description 13
- 238000012216 screening Methods 0.000 claims abstract description 13
- 239000002002 slurry Substances 0.000 claims description 38
- 239000012535 impurity Substances 0.000 claims description 30
- 239000000463 material Substances 0.000 claims description 28
- 239000002893 slag Substances 0.000 claims description 26
- 239000000203 mixture Substances 0.000 claims description 24
- 239000007787 solid Substances 0.000 claims description 21
- 238000000926 separation method Methods 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 235000013601 eggs Nutrition 0.000 claims description 14
- 239000000706 filtrate Substances 0.000 claims description 13
- 230000012447 hatching Effects 0.000 claims description 12
- 238000004537 pulping Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 241000209140 Triticum Species 0.000 claims description 6
- 235000021307 Triticum Nutrition 0.000 claims description 6
- 239000010902 straw Substances 0.000 claims description 6
- 235000013339 cereals Nutrition 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000003895 organic fertilizer Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 4
- 238000009264 composting Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 235000015099 wheat brans Nutrition 0.000 claims description 3
- 238000011534 incubation Methods 0.000 claims 1
- 239000004576 sand Substances 0.000 claims 1
- 239000010865 sewage Substances 0.000 abstract description 9
- 230000029087 digestion Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 4
- 235000016709 nutrition Nutrition 0.000 abstract description 3
- 230000035764 nutrition Effects 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 abstract description 2
- 238000002474 experimental method Methods 0.000 description 3
- 239000010871 livestock manure Substances 0.000 description 3
- 238000000855 fermentation Methods 0.000 description 2
- 230000004151 fermentation Effects 0.000 description 2
- 239000010794 food waste Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241000255632 Tabanus atratus Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000012258 culturing Methods 0.000 description 1
- 230000001877 deodorizing effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 230000001418 larval effect Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 230000000384 rearing effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K67/00—Rearing or breeding animals, not otherwise provided for; New or modified breeds of animals
- A01K67/033—Rearing or breeding invertebrates; New breeds of invertebrates
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K10/00—Animal feeding-stuffs
- A23K10/20—Animal feeding-stuffs from material of animal origin
- A23K10/26—Animal feeding-stuffs from material of animal origin from waste material, e.g. feathers, bones or skin
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K10/00—Animal feeding-stuffs
- A23K10/30—Animal feeding-stuffs from material of plant origin, e.g. roots, seeds or hay; from material of fungal origin, e.g. mushrooms
- A23K10/37—Animal feeding-stuffs from material of plant origin, e.g. roots, seeds or hay; from material of fungal origin, e.g. mushrooms from waste material
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K20/00—Accessory food factors for animal feeding-stuffs
- A23K20/10—Organic substances
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23K—FODDER
- A23K50/00—Feeding-stuffs specially adapted for particular animals
- A23K50/90—Feeding-stuffs specially adapted for particular animals for insects, e.g. bees or silkworms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F3/00—Fertilisers from human or animal excrements, e.g. manure
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/80—Food processing, e.g. use of renewable energies or variable speed drives in handling, conveying or stacking
- Y02P60/87—Re-use of by-products of food processing for fodder production
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Polymers & Plastics (AREA)
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- Biodiversity & Conservation Biology (AREA)
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- Biomedical Technology (AREA)
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Abstract
The invention relates to the technical field of treatment of kitchen waste, in particular to a deep recycling treatment method of kitchen waste, which comprises the following steps: the method comprises the following steps of deep pretreatment, three-phase separation treatment, organic feed preparation, black soldier fly breeding and black soldier fly recycling treatment. The invention improves the recovery rate of the crude oil in the kitchen waste, and the oil content of the produced crude oil is as high as 97%; the wastewater generated in the treatment process can directly enter a sewage treatment station without anaerobic digestion, and meanwhile, part of the wastewater can be used for preparing the feed for cultivating the hermetia illucens, so that the pressure of the sewage treatment station is reduced, and the investment cost is reduced; the prepared organic feed is high and uniform in nutrition density, the breeding period of the hermetia illucens is shortened, and the mechanized screening of hermetia illucens larvae and insect feces is realized; the black soldier fly breeding device has the advantages that the black soldier fly is bred by adopting automatic equipment such as the automatic guide transport vehicle, the automation and large-scale breeding of the black soldier fly are realized, the labor cost is saved, and the production efficiency is improved.
Description
Technical Field
The invention relates to the technical field of kitchen waste, in particular to a deep recycling treatment method for kitchen waste.
Background
The kitchen waste refers to food waste and food residues in families, schools, public dining halls of institutions and catering industries, has the characteristics of high water content, rich organic matter content and high salt content, and has great recycling value.
The kitchen waste is extremely easy to rot and breed bacteria, if the kitchen waste is not properly treated, the environmental pollution is very large, the treatment mode of the kitchen waste in China at present is that the squeezed filtrate and slag materials are subjected to resource utilization after pretreatment such as sorting, crushing, squeezing and the like, and the main resource process comprises the following steps: the yield of the crude oil is low, only the filtrate after squeezing is subjected to three-phase separation to extract the crude oil, and the crude oil in the slag charge is not fully utilized. The slag is dried to prepare the organic feed, and the process is simple and easy to operate, but has the risk of homologous pollution. The slag and the wastewater generated by three-phase separation are mixed and subjected to full-material anaerobic digestion to generate the biogas, the process has high investment, low benefit and incomplete treatment, and the biogas residues need to be treated again. The process for breeding the hermetia illucens by using the slag is low in investment and high in income, high-quality protein feed and high-quality organic fertilizer can be produced, but the control difficulty of breeding and screening of the hermetia illucens is high, and automation and large-scale breeding are difficult to realize.
In summary, the current kitchen waste recycling treatment in China has the following problems:
(1) only three-phase separation is carried out on the filtrate in the kitchen waste to extract crude oil, the crude oil in the slag is not fully utilized, and the yield of the crude oil is low;
(2) the difficulty of breeding and screening the hermetia illucens is high, and automation and large-scale breeding are difficult to realize.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a deep recycling treatment method based on kitchen waste, which improves the recovery rate and oil content of crude oil, and the oil content of the produced crude oil is as high as more than 97%; the wastewater generated in the treatment process can directly enter a sewage treatment station without anaerobic digestion, and meanwhile, part of the wastewater can be used for preparing the feed for cultivating the hermetia illucens, so that the pressure of the sewage treatment station is reduced, and the investment cost is reduced; meanwhile, the organic feed for breeding the hermetia illucens is prepared on the basis of the kitchen waste, the optimal feed ratio and optimal breeding conditions are obtained through a large number of experiments, the breeding period of the hermetia illucens is shortened, and the mechanized screening of hermetia illucens larvae and insect feces is realized; meanwhile, automatic equipment is adopted, so that the automation and large-scale breeding of the hermetia illucens are realized, the labor cost is saved, and the production efficiency is improved.
The technical purpose of the invention is realized by the following technical scheme, and the method for deeply recycling the kitchen waste comprises the following steps:
s1, deep pretreatment, namely, preparing homogeneous organic slurry by sequentially carrying out solid-liquid separation treatment, hydraulic separation treatment, crushing pulping treatment and deep impurity removal treatment on the kitchen waste,
after the solid-liquid separation treatment is carried out on the kitchen waste, solid kitchen waste and filtrate are obtained,
the hydraulic separation treatment comprises the steps of inputting the solid kitchen waste into a hydraulic separator, removing light impurities and heavy impurities in the solid kitchen waste to obtain a first intermediate of organic slurry,
the crushing pulping treatment is to convey the first intermediate of the organic slurry and the filtrate to a crusher to be crushed and mixed to obtain a second intermediate of the organic slurry;
s2, carrying out three-phase separation treatment, namely heating and stirring the homogeneous organic slurry to a uniform state, inputting the homogeneous organic slurry into a three-phase separator, and separating out wastewater, organic slag and crude oil;
s3, preparing an organic feed, forcibly stirring and uniformly mixing auxiliary materials, the organic slag and the partial wastewater through a mixer to prepare a mixture, crushing the mixture to prepare the organic feed, wherein the auxiliary materials are used for adjusting the water content of the organic feed, and the water content of the mixture is 70-73%;
s4, breeding the hermetia illucens,
hatching the eggs, putting the organic feed and the hermetia illucens eggs into a hatching box to obtain hermetia illucens 1-year larvae, wherein the hermetia illucens 1-year larvae are the hermetia illucens larvae which are just hatched from the hermetia illucens eggs, the weight ratio of the hermetia illucens eggs to the organic feed is 1:50,
breeding larvae, namely putting 1-instar hermetia illucens into a breeding box containing the uniformly spread organic feed, wherein the weight ratio of the 1-instar hermetia illucens to the organic feed is 1: 240-260, arranging the breeding box on a breeding frame, breeding for 5-7 days to obtain a mixture of the right-instar hermetia illucens and insect dung,
separating the insect feces, namely separating the mixture of the hermetia illucens larvae with the proper age and the insect feces by a screening machine;
s5, recycling the hermetia illucens, drying the hermetia illucens larvae in a microwave oven to obtain high-protein dry insects, and carrying out aerobic composting on the insect feces to obtain the organic fertilizer.
Preferably, the solid content of the organic slurry second intermediate is 5-7%, and the particle size of the organic slurry second intermediate is less than 10 mm.
Preferably, the deep impurity removal treatment is to input the second intermediate of the organic slurry into a grit chamber for precipitation, separate impurities through a cyclone desander, and input the second intermediate of the organic slurry into a horizontal spiral slag remover for separating light impurities to prepare the homogeneous organic slurry.
Preferably, in step S2, the feeding temperature of the three-phase separator is 50 to 60 ℃, the oil content of the crude oil is greater than 97%, the oil content of the wastewater is less than 0.3%, the oil content of the organic slag is less than 0.3%, and the water content of the organic slag is 70 to 75%.
Preferably, the water content of the auxiliary material is 10%, the particle size of the auxiliary material is less than 3mm, the auxiliary material is wheat straw and/or wheat bran, and the particle size of the mixture is less than 3 mm.
Preferably, in the hatching process of the worm eggs, the ambient temperature is 30-35 ℃, and the air humidity is 75%.
Preferably, the organic feed is spread to a thickness of < 5cm during the larval rearing process.
Preferably, in the larva breeding process, the ambient temperature is 25-30 ℃, and the air humidity is 70%.
Preferably, in the larva breeding process, the breeding box is arranged in a space three-dimensional mode, the material is distributed through the automatic feeding machine only once, and secondary material distribution or material turning is not needed in the breeding process.
Preferably, in the larva breeding process, when the body length of the black soldier fly larvae is more than 200mm and the moisture content of the insect feces is less than 40%, the breeding is finished.
The invention has the following beneficial effects:
firstly, the recovery rate and the oil content of crude oil are improved, the kitchen waste is subjected to deep impurity removal to prepare homogeneous organic slurry, so that the crude oil in the material residue is fully utilized, the homogeneous organic slurry is also favorable for improving the efficiency of three-phase separation, and the oil content of the produced crude oil is as high as more than 97%;
secondly, the wastewater generated in the three-phase separation treatment process can directly enter a sewage treatment station without anaerobic digestion, so that the investment cost is reduced, and meanwhile, part of the wastewater can be used as a raw material for preparing organic feed, so that not only are organic matters in the wastewater fully utilized, but also the treatment pressure of the sewage treatment station is reduced;
thirdly, the oil content of the organic slag generated in the three-phase separation treatment process is low, so that the prepared organic feed does not need fermentation treatment, and the material cost is saved;
fourthly, the breeding period of the hermetia illucens is shortened, the organic feed produced by the method is high and uniform in nutrition density, the condition that the sizes of the hermetia illucens are not uniform can be avoided, and the breeding period can be shortened by 1-2 days;
the invention obtains the optimal insect material ratio and the optimal breeding conditions through a large number of experiments, realizes that the larva can be fed once in the initial quantitative breeding process, and can meet the screening requirements of the larva and the insect feces after the breeding is finished, avoids the increase of the field and labor cost caused by secondary feeding or midway turning, and simultaneously uses a three-dimensional breeding frame and an AGV robot, namely an automatic guided transport vehicle and other automatic equipment to arrange the breeding frame and transport, realizes automation, saves the labor cost and improves the efficiency.
Detailed Description
The present invention is described in further detail below with reference to examples, which are intended to facilitate the understanding of the present invention and are not intended to limit the present invention in any way. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control.
The term "prepared from …" as used herein is synonymous with "comprising". The terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.
The conjunction "consisting of …" excludes any unspecified elements, steps or components. If used in a claim, the phrase is intended to claim as closed, meaning that it does not contain materials other than those described, except for the conventional impurities associated therewith. When the phrase "consisting of …" appears in a clause of the subject matter of the claims rather than immediately after the subject matter, it defines only the elements described in the clause; other elements are not excluded from the claims as a whole.
When an amount, concentration, or other value or parameter is expressed as a range, preferred range, or as a range of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. For example, when a range of "1 to 5" is disclosed, the described range should be interpreted to include the ranges "1 to 4", "1 to 3", "1 to 2 and 4 to 5", "1 to 3 and 5", and the like. When a range of values is described herein, unless otherwise stated, the range is intended to include the endpoints thereof and all integers and fractions within the range.
Example 1
S1, deep pretreatment: taking 100t/d of kitchen waste, and carrying out the following operations on the kitchen waste:
solid-liquid separation treatment: 100t/d kitchen waste is poured into a discharge bin, the discharge bin is connected with a U-shaped shaftless spiral conveying device with an included angle of 27 degrees with the horizontal plane, the U-shaped shaftless spiral conveying device comprises a tank body lining plate and a shaftless spiral body, a round hole is formed in the tank body lining plate, the aperture of the round hole is 10mm, when the kitchen waste is conveyed in the U-shaped shaftless spiral conveying groove, 30% of liquid in the kitchen waste flows into a filtrate pool through the round hole in the tank body lining plate, so that the liquid and solid in the kitchen waste are separated, filtrate and solid kitchen waste are obtained, and the water content of the solid kitchen waste is 85%; conveying the solid kitchen waste into a hydraulic separator through a U-shaped shaftless spiral conveying device;
hydraulic separation treatment: the stirring shaft is arranged inside the hydraulic separator, so that solid kitchen waste can be primarily crushed, in the hydraulic separation process, the solid kitchen waste is separated into light impurities, heavy impurities and a first intermediate of organic slurry under the action of centrifugal force, the light impurities are discharged from the upper part of the hydraulic separator through the U-shaped shaftless spiral conveying device, and the heavy impurities are discharged from the lower part of the hydraulic separator through the U-shaped shaftless spiral conveying device;
crushing and pulping: the method comprises the steps of conveying a first organic pulp intermediate mixed with part of light impurities and heavy impurities from a hydraulic separator to a crushing pulping machine through a U-shaped shaftless spiral conveying device, conveying filtrate in a filtrate pool to the crushing pulping machine through a pipeline, crushing and mixing the first organic pulp intermediate and the filtrate to prepare a second organic pulp intermediate, and controlling the solid content of the second organic pulp intermediate to be 6% in the preparation process. Enabling the second intermediate of the organic slurry to flow into a grit chamber through a 10mm sieve pore in the crushing pulping machine for impurity removal treatment, wherein light impurities and heavy impurities mixed in the organic slurry can be further removed through the 10mm sieve pore in the crushing pulping machine;
deep impurity removal treatment: the organic slurry second intermediate is precipitated for 12 hours in the grit chamber, the gravel contained in the organic slurry second intermediate, the suspended solids with high density and the like are gathered at the bottom of the grit chamber, the impurities at the bottom are discharged through a U-shaped shaftless spiral conveying device, the grit chamber is connected with a cyclone desander through a pipeline, the cyclone desander is connected with a horizontal spiral slag remover through a pipeline, the organic slurry second intermediate after precipitation is conveyed to the cyclone desander, the precipitates such as residual gravel are removed, the light impurities and the suspended solids with low density are further removed in the horizontal spiral slag remover through the pipeline, and 152.5t/d homogeneous organic slurry is prepared and obtained.
S2, three-phase separation treatment: the method comprises the steps of conveying homogenized organic slurry into a slurry tank through a pipeline, stirring and heating uniformly, wherein the temperature of the homogenized organic slurry is 55 ℃, conveying the uniformly heated homogenized organic slurry into a three-phase separator through a pipeline, separating out 131.5t/d of wastewater, 18t/d of organic slag and 3t/d of crude oil, wherein the oil content of the crude oil is 97.12%, the oil content of the wastewater is 0.29%, the temperature of the wastewater is 45 ℃, the water content of the organic slag is 75%, the oil content of the organic slag is 0.28%, recycling 67.5t/d of the separated wastewater to prepare organic feed, recycling 14t/d of the wastewater for black soldier fly breeding, and conveying the rest 50t/d to a sewage treatment station.
The homogeneous organic slurry prepared by the deep pretreatment of the step S1 can be layered at a lower heating temperature with crude oil, wastewater and organic slag, the feeding temperature of three-phase separation is reduced, the separation effect is not influenced, the temperature of the separated wastewater is less than 50 ℃, the wastewater can directly enter a sewage treatment station for treatment, anaerobic digestion is not needed, and the investment cost is reduced. The waste water generated by three-phase separation can be partially used as the raw material of organic feed, and the organic matters in the waste water are fully utilized.
S3, preparing organic feed: the method comprises the steps of obtaining auxiliary material wheat straws, wherein the grain size of the wheat straws is less than 3mm, the water content of the wheat straws is 10%, adding 18t/d of organic slag, 14t/d of waste water and 7.8t/d of the auxiliary material wheat straws into a mixer, forcibly stirring for 30min, adjusting the water content of a mixture to be 70% and the grain size to be less than 3mm, uniformly mixing to obtain a 39.8t/d mixture, and conveying the mixture to a ball mill to be crushed to obtain the organic feed with the grain size to be less than 3 mm.
Thereby control mixture moisture content prepares high-quality organic fodder, can realize that follow-up heisui river horsefly breeds in-process initial feeding once, need not to carry out the secondary in the breed process and throws the material or midway stirring, breeds the requirement that can reach larva and worm excrement separation screening to artifical and place cost has been reduced.
S4, breeding the hermetia illucens:
hatching worm eggs: adding 2.5kg of organic feed into each egg hatching box, adding 50g of hermetia illucens eggs, keeping the temperature at 30-35 ℃ and the humidity at 75% for hatching the eggs, hatching and culturing for 5-6 days, and after hatching is finished, equally dividing one hatching box into 5 parts to obtain 5 parts of hatched 1-year larvae of hermetia illucens, wherein the 1-year larvae of hermetia illucens are newly hatched hermetia illucens eggs.
Larva breeding: obtaining a 2m multiplied by 1m multiplied by 0.2m glass fiber reinforced plastic larva breeding box and a breeding frame, arranging the breeding box on the breeding frame, adopting a spatial three-dimensional mode for the arrangement of the breeding box, distributing 60kg of materials in the breeding box by using an automatic feeding machine, uniformly paving the materials, enabling the thickness of organic feed to be less than 5cm, adding 1 part of hatched 1-year larvae of hermetia illucens, controlling the temperature to be 25-30 ℃ and the air humidity to be 70%, ventilating and deodorizing under negative pressure, finishing breeding after the fifth day of breeding, and obtaining a mixture of the 5-year larvae of hermetia illucens and insect manure;
separating insect from excrement: when the body length of the black soldier fly larvae is more than 200mm and the moisture content of the insect dung is less than 40%, the screening requirement is met, the mixture of the bred black soldier fly larvae of the proper age and the insect dung is screened by using a screening machine with air separation, the screening machine with the air separation comprises a box body, an air separation feed inlet, a 6mm screen frame outlet, a 3mm screen frame outlet and a driving device, light components such as plastics, fibers and auxiliary materials are removed from the air separation feed inlet, 13.3t/d of black soldier fly larvae are screened out from the 6mm screen frame outlet, and 26.5t/d of insect dung is screened out from the 3mm screen frame outlet; by adopting the screening machine with the winnowing function, the black soldier fly larvae with the right age, the insect manure and other impurities can be efficiently screened out according to different weights of different components in the mixture of the black soldier fly larvae with the right age and the insect manure, so that the production efficiency is improved, and the screening cost is saved.
S5, recycling the hermetia illucens: directly pouring the screened 13.3t/d hermetia illucens larvae into a tunnel type microwave dryer, and drying the hermetia illucens larvae until the moisture content is 5% to obtain 4.42t/d high-quality high-protein dry insects; directly pouring the screened insect feces into an aerobic composting tank for fermentation to obtain 20.5t/d organic fertilizer.
Example 2
The present embodiment is different from embodiment 1 in that: in the step S2, the oil content of the crude oil is 97.22%, the oil content of the wastewater is 0.28%, the water content of the organic slag is 73%, the oil content of the organic slag is 0.26%, in the step S3, the auxiliary material added into the mixture is 5.9t/d wheat bran, so that a mixture of 37.9t/d is obtained, and the water content of the mixture is adjusted to 73%; in the step of S4, in the step of separating the insects and the excrement, the number of black soldier fly larvae of proper age screened out from an outlet of a 6mm sieve frame is 12.6t/d, and the number of insect excrement screened out from an outlet of a 3mm sieve frame is 25.3 t/d; in step S5, the high-quality high-protein dry insect is obtained at 4.21t/d, and the organic fertilizer is obtained at 19.5 t/d.
The materials used, the reaction conditions and the materials prepared in examples 1-2 are shown in the following table,
according to the invention, the kitchen waste is firstly subjected to advanced pretreatment, filtrate is separated through solid-liquid separation treatment, and substances such as light impurities, heavy impurities, gravels, high-density suspended matters and the like in the kitchen waste are respectively removed through hydraulic separation treatment, crushing pulping treatment and advanced impurity removal treatment, so that homogeneous organic slurry is prepared. Through deep pretreatment, crude oil in the solid kitchen waste can be fully extracted and recovered, so that the solid kitchen waste is fully utilized, the recovery rate of the crude oil is increased, and the oil content of the produced crude oil can reach 97%. In the step S2, the three-phase separation treatment is carried out on the deeply pretreated homogeneous organic slurry, the organic slurry is uniformly dispersed, the solid particle size is small, and the solid content is low, so that the crude oil, the wastewater and the organic slag can be layered at a lower heating temperature, and the separated wastewater contains low crude oil and suspended matter content due to the lower separation temperature, so that the wastewater can directly enter a sewage treatment station, and the treatment cost is reduced. Waste water, organic slag and auxiliary materials are mixed to prepare the organic feed, the waste water separated out in three phases can be directly recycled to produce the organic feed, the treatment cost is reduced, the prepared organic feed is high in nutrition density and uniform, and the situation that the sizes of the bred hermetia illucens larvae are not uniform in the breeding process of the hermetia illucens can be avoided. Organic fodder in hatching box afterwards, control ambient temperature, humidity to also use three-dimensional breed frame, AGV robot to arrange the frame of breeding and the transportation promptly automatic equipment such as automatic guided transport vechicle simultaneously, realized the automation, practiced thrift the human cost, improved production efficiency.
The foregoing examples are merely illustrative and serve to explain some of the features of the method of the present invention. The appended claims are intended to claim as broad a scope as is conceivable, and the examples presented herein demonstrate the results of applicants' actual experiments. Accordingly, it is applicants' intention that the appended claims are not to be limited by the choice of examples illustrating features of the invention. Also, where numerical ranges are used in the claims, subranges therein are included, and variations in these ranges are also to be construed as possible being covered by the appended claims.
Claims (10)
1. A treatment method for deeply recycling kitchen waste is characterized by comprising the following steps:
s1, deep pretreatment, namely, preparing homogeneous organic slurry by sequentially carrying out solid-liquid separation treatment, hydraulic separation treatment, crushing pulping treatment and deep impurity removal treatment on the kitchen waste,
after the solid-liquid separation treatment is carried out on the kitchen waste, solid kitchen waste and filtrate are obtained,
the hydraulic separation treatment comprises the steps of inputting the solid kitchen waste into a hydraulic separator, removing light impurities and heavy impurities in the solid kitchen waste to obtain a first intermediate of organic slurry,
the crushing pulping treatment is to convey the first intermediate of the organic slurry and the filtrate to a crusher to be crushed and mixed to obtain a second intermediate of the organic slurry;
s2, carrying out three-phase separation treatment, namely heating and stirring the homogeneous organic slurry to a uniform state, inputting the homogeneous organic slurry into a three-phase separator, and separating out wastewater, organic slag and crude oil;
s3, preparing an organic feed, forcibly stirring and uniformly mixing auxiliary materials, the organic slag and the partial wastewater through a mixer to prepare a mixture, crushing the mixture to prepare the organic feed, wherein the auxiliary materials are used for adjusting the water content of the organic feed, and the water content of the mixture is 70-73%;
s4, breeding the hermetia illucens,
hatching eggs, putting the organic feed and the hermetia illucens eggs into a hatching box to obtain 1-instar hermetia illucens larvae, wherein the weight ratio of the hermetia illucens eggs to the organic feed is 1:50,
breeding larvae, namely putting 1-instar hermetia illucens into a breeding box containing the uniformly spread organic feed, wherein the weight ratio of the 1-instar hermetia illucens to the organic feed is 1: 240-260, arranging the breeding box on a breeding frame, breeding for 5-7 days to obtain a mixture of the right-instar hermetia illucens and insect dung,
separating the insect feces, namely separating the mixture of the hermetia illucens larvae with the proper age and the insect feces by a screening machine;
s5, recycling the hermetia illucens, drying the hermetia illucens larvae in a microwave oven to obtain high-protein dry insects, and carrying out aerobic composting on the insect feces to obtain the organic fertilizer.
2. The method for deeply recycling kitchen waste according to claim 1, wherein said organic slurry secondary intermediate has a solid content of 5% -7%, and said organic slurry secondary intermediate has a particle size of less than 10 mm.
3. The method for deeply recycling kitchen waste according to claim 1, wherein the deep impurity removal treatment is to input the second intermediate of the organic slurry into a grit chamber for precipitation, separate impurities through a cyclone sand remover, and input the second intermediate into a horizontal spiral slag remover for separating light impurities to prepare the homogeneous organic slurry.
4. The method for deeply recycling kitchen waste according to claim 1, wherein in step S2, the feeding temperature of said three-phase separator is 50 ℃ to 60 ℃, the oil content of said crude oil is greater than 97%, the oil content of said wastewater is less than 0.3%, the oil content of said organic residue is less than 0.3%, and the water content of said organic residue is 70% to 75%.
5. The deep resource treatment method for the kitchen waste according to claim 1, wherein in step S3, the water content of the auxiliary material is 10%, the grain size is less than 3mm, the auxiliary material is wheat straw and/or wheat bran, and the grain size of the mixture is less than 3 mm.
6. The deep resource treatment method of kitchen waste according to claim 1, characterized in that during the incubation of the eggs, the ambient temperature is 30-35 ℃ and the air humidity is 75%.
7. The method for deeply recycling kitchen waste according to claim 1, wherein the organic feed is spread to a thickness of less than 5cm during the cultivation of larvae.
8. The method for deeply recycling kitchen waste according to claim 1, wherein the environment temperature is 25 ℃ to 30 ℃ and the air humidity is 70% during the larva cultivation process.
9. The method for deeply recycling kitchen waste according to claim 1, wherein said cultivating boxes are arranged in a spatial manner during said larva cultivating process, and are distributed by an automatic feeding machine.
10. The method for deeply recycling kitchen waste according to claim 1, wherein in the process of breeding the larvae, when the body length of the black soldier fly larvae is more than 200mm and the moisture content of the insect feces is less than 40%, the breeding is finished.
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