CN116274296A

CN116274296A - Method for treating full kitchen waste by means of hermetia illucens

Info

Publication number: CN116274296A
Application number: CN202310177626.9A
Authority: CN
Inventors: 沈天册; 张帆; 何磊; 符宁宏
Original assignee: Chengdu Weilanxing Biotechnology Co ltd
Current assignee: Chengdu Weilanxing Biotechnology Co ltd
Priority date: 2023-02-28
Filing date: 2023-02-28
Publication date: 2023-06-23

Abstract

The invention discloses a method for treating full kitchen waste by using hermetia illucens, which comprises the following steps: step S1, after pretreatment of kitchen waste, adding a thickener with the mass percentage of 0.01-1.0% to obtain cultivation slurry; s2, adding black soldier fly larvae into the culture slurry, and collecting and obtaining black soldier fly bodies and insect manure after one period of culture; according to the method, firstly, the kitchen waste is pretreated to remove grease and inorganic matters in the kitchen waste, then a small amount of thickening agent is added, the fluid volume can be remarkably improved by utilizing the thickening agent, the viscosity of the kitchen waste containing a large amount of landfill leachate can be remarkably increased, the pretreated kitchen waste is prepared into cultivation slurry capable of meeting the requirements of normal growth and propagation of the black soldier flies, and finally, the black soldier flies are cultivated by utilizing the cultivation slurry, so that the quick and efficient treatment of the full-volume kitchen waste by the black soldier flies is realized; the treatment method not only remarkably improves the efficiency of treating the kitchen waste by the hermetia illucens, but also increases the yield of the hermetia illucens, reduces the treatment cost, and is more beneficial to the large-scale application of the process for treating the kitchen waste by the hermetia illucens in the kitchen waste treatment.

Description

Method for treating full kitchen waste by means of hermetia illucens

Technical Field

The invention relates to the field of garbage disposal, in particular to a method for treating full kitchen garbage by using hermetia illucens.

Background

The kitchen waste can generate a large amount of pollutants, such as malodorous pollutant H, in the processes of collection, transportation, stacking and treatment ₂ S、NH ₃ And kitchen waste leachate, etc., wherein the treatment of the kitchen waste leachate is a great difficulty in the current kitchen waste treatment. The main treatment processes of the kitchen waste at present comprise anaerobic fermentation, aerobic composting, insect cultivation and the like. The anaerobic fermentation for preparing the biogas has the advantages of long process fermentation period, large occupied area, low gas production rate, complex process, large investment, low energy conversion efficiency, imperfect disposal of byproducts such as residues and the like after anaerobic fermentation at present, and a large amount of biogas slurry can reach the emission standard only by matching with advanced treatment of sewage treatment facilities; the products of the aerobic composting can be used as soil amendments and compound fertilizers, but the cost of the aerobic composting is high, the decomposition period is long, and odor and secondary pollution of percolate can be generated; in recent years, organic garbage is removed by using putrescence insects, and the advantages of simple operation, low cost, high benefit, low carbon emission reduction in the cultivation process and the like are more and more paid attention to. The collected kitchen waste is usually solid-liquid mixture, after the kitchen waste is transported to a waste treatment plant, the solid phase and the liquid phase in the kitchen waste are separated, and then the kitchen waste is treated respectively, wherein the content of percolate in the kitchen waste is about 50-65% after statistics. But the organic solid slag obtained after the main stream kitchen pretreatment process is less, and the high-concentration percolate is more, so that the culture raw materials are insufficient, and meanwhile, large-scale construction of sewage treatment facilities is required, so that the kitchen treatment cost is greatly increased.

The method for treating the kitchen waste by using the hermetia illucens is a novel kitchen waste biological treatment method, has been focused and researched by people because of the advantages of low cost and environmental protection, and has been subjected to small-scale and industrial experiments. Such as: the invention patent CN201510246522.4 discloses a method for treating kitchen waste and sewage by using hermetia illucens; the invention patent CN 202010018952.1 relates to a kitchen waste leachate treatment device and a use method thereof; the invention patent CN202011050652.8 discloses a method for treating perishable garbage leachate by using hermetia illucens; in the above patent, the black soldier fly is utilized to treat the kitchen waste, but in the treatment process, a large amount of solid premix, water absorbing materials or zymophyte and the like are needed to be added to prepare kitchen waste percolate suitable for black water growth, and meanwhile, in the cultivation process of the black soldier fly, the problem of unreasonable condition selection or high energy consumption exists, so that the defects of high cost and low efficiency exist when the kitchen waste is treated by adopting the method, and the large-scale application of the process for treating the kitchen waste by using the black soldier fly in the garbage treatment is seriously influenced.

Disclosure of Invention

The invention aims to overcome the defects of high cost and low efficiency of the existing method for treating kitchen waste by using the black soldier flies, and provides a method for treating the full amount of kitchen waste by using the black soldier flies.

A method for treating full kitchen waste by using hermetia illucens comprises the following steps:

s1, adding a thickener with the mass percentage of 0.01-1.0% into pretreated kitchen waste to obtain culture slurry;

and S2, adding the hermetia illucens larva into the culture slurry, and collecting the hermetia illucens body and the worm manure after one period of culture.

In the step S1, the pretreatment of the kitchen waste is to remove grease and inorganic matters; grease can influence oxygen to enter the solution, so that oxygen deficiency is caused when the black soldier flies grow, and the growth of the black soldier flies is not facilitated; the inorganic matters can not be decomposed by the hermetia illucens, can not provide nutrients required by the growth of the hermetia illucens, can also cause the deposition of kitchen waste and is unfavorable for the growth of the hermetia illucens, so that the grease and the inorganic matters in the kitchen waste need to be removed.

Preferably, the pretreated kitchen waste is prepared by the following method:

(1) Filtering kitchen waste to obtain percolate and solid waste;

(2) Screening and washing the solid garbage obtained in the step (1) through a rotary screen, and separating to obtain organic garbage, oily sewage and inorganic matters;

(3) Heating the oily sewage obtained in the step (2) and the percolate obtained in the step (1), and then separating by using a three-phase centrifuge to obtain sewage, grease and waste residues;

(4) Mixing the organic garbage obtained in the step (2) with the sewage and the waste residue obtained in the step (3) to obtain the pretreated kitchen garbage.

Wherein, in the step (2), preferably, the screen washing is carried out by spraying water at 50-70 ℃; through hot water screening washing, grease attached to the solid garbage can be eluted, so that grease is separated more thoroughly.

Wherein the water is the sewage obtained in the step (3); can save water resources and energy consumption, simultaneously reduce the generation of sewage and has lower treatment cost of kitchen waste.

Wherein, in the step (3), the heating temperature is preferably 65-75 ℃; the separation is more thorough by heating, and the separation effect is better.

In step S1, preferably, the thickener is one or more of xanthan gum, carrageenan, agar or SAP resin; the hydrophobic main chain of the thickener can associate with water molecules and/or intertwine molecular chains through hydrogen bonds, so that the fluid volume of the thickener is remarkably improved, the viscosity of kitchen waste containing a large amount of landfill leachate can be remarkably increased under the action of a very small amount of thickener, and the normal growth and propagation requirements of hermetia illucens are met; more preferably, the thickener is a mixture of xanthan gum, carrageenan and agar at a mass ratio of 0.05-0.2:0.1-0.8:0.1-1; the preferable thickener composition has better thickening effect, less addition and lower cost under the condition of not affecting the growth of the hermetia illucens; most preferably, the mass ratio of the mixture of xanthan gum, carrageenan and agar in the thickener is 0.01:0.1:0.1.

In the step S1, preferably, the viscosity of the culture slurry is more than or equal to 1000cp, and the Chemical Oxygen Demand (COD) is more than or equal to 50000mg/L; the viscosity and COD of the culture slurry are optimized, the method is more suitable for the growth of the hermetia illucens, the growth speed is higher, the consumption speed of the culture slurry is higher, and the treatment efficiency is higher.

In the step S2, preferably, the hermetia illucens larva is obtained by culturing for 5d after hatching of a hermetia illucens egg; the optimal hermetia illucens larvae have strong vitality, lower requirements on growth environment, enter a rapid growth period and have higher decomposition speed on culture slurry.

Wherein, preferably, the hermetia illucens larva is added in an amount of 0.1g of hermetia illucens ovum per kilogram of culture slurry; the optimal addition of the hermetia illucens has high decomposition speed and low cost on kitchen waste.

Wherein, preferably, the one period is 7d; the growth degree of the black soldier flies is optimal, and the decomposition efficiency of the kitchen waste is highest.

Preferably, the hermetia illucens is placed in a totally-enclosed cultivation room for cultivation; the fully-closed culture room adopts a reinforced concrete frame structure or a heat-insulating sandwich board form, fresh air deodorization facilities are arranged at the top of the culture room and at two sides of a wall body, the fresh air quantity is slightly smaller than the deodorization air quantity, the micro-negative pressure environment of the internal space is maintained, and odor is prevented from overflowing; the two sides of the wall body are provided with condensing heat exchangers, cold water at 15 ℃ is circulated, condensation and dehumidification are carried out on the cultivation area, and drainage ditches are arranged on the two sides of the wall body, so that condensed water is conveniently discharged; the preferable design of the culture room has the advantages of negative pressure deodorization, temperature control and humidity control, and additional heat preservation measures, so that stable and efficient culture throughout the year can be realized, the influence of external environment change is avoided, the treatment efficiency is obviously improved, and the environment is not polluted.

Preferably, in the hermetia illucens cultivation process, the cultivation temperature is controlled at 32-38 ℃; at the optimal temperature, the black soldier flies grow fast, and the decomposition efficiency of the kitchen waste is highest.

Preferably, the hermetia illucens is cultivated by adopting a cultivation basket; the cultivation basket is a frame made of corrosion-resistant carbon steel or stainless steel or glass fiber reinforced plastic with the length of 6 meters, the width of 2 meters and the height of 30cm, a glass grating plate or a stainless steel net is paved at the bottom of the cultivation basket to serve as a support, and an 80-mesh nylon net or a stainless steel net bag is paved on the support; the preferable basket structure of breeding, the gas permeability is good, more is favorable to the growth of black soldier fly, simultaneously, stackable stack to reduce occupation space, treatment effeciency is higher, and the cost is lower.

Compared with the prior art, the invention has the beneficial effects that:

(1) According to the method for treating the full amount of kitchen waste by using the hermetia illucens, the viscosity of the percolate is improved by using the high molecular thickener, and the percolate can be converted into the culture slurry for the growth of the hermetia illucens under the condition of using a small amount of thickener, so that the kitchen waste can be treated by using the hermetia illucens under the condition of lower cost, and the treatment efficiency is also obviously improved.

(2) According to the method for treating the full kitchen waste by using the black soldier flies, the pretreatment of the kitchen waste is carried out by adopting a roller hot water flushing process, so that grease in the kitchen waste can be removed more quickly and thoroughly, inorganic matters can be screened out, the growth of the black soldier flies is facilitated, the waste except the grease and the inorganic matters in the kitchen waste can be used as the food of the black soldier flies, the yield of the black soldier flies is higher, and the kitchen waste can be treated more thoroughly.

(3) The method for treating the full kitchen waste by fully utilizing the hermetia illucens adopts a fully-closed cultivation room, can realize stable and efficient cultivation all year round by adopting measures such as negative pressure deodorization, temperature control and humidity control, is not influenced by the change of the external environment temperature, remarkably improves the treatment efficiency, and has no pollution to the environment.

(4) The method for treating the full kitchen waste by using the hermetia illucens is simple and reliable, has low cost and is suitable for treating the kitchen waste on a large scale.

Detailed Description

The present invention will be described in further detail with reference to test examples and specific embodiments. It should not be construed that the scope of the above subject matter of the present invention is limited to the following embodiments, and all techniques realized based on the present invention are within the scope of the present invention.

Example 1

1. Pouring 1 ton of collected kitchen waste into a discharge hopper, and filtering after natural sedimentation to obtain 0.56 ton of percolate and 0.44 ton of solid waste; conveying solid garbage into a horizontal rotary screen through a shaftless auger, continuously spraying hot water at 60 ℃ (the hot water is recycled water after kitchen garbage percolate is heated and subjected to three-phase centrifugal deoiling), washing off grease attached to the surface of the kitchen garbage, screening out 0.03 ton of inorganic garbage through a large-aperture screen in the rotary screen, and separating out 0.4 ton of organic garbage and 0.58 ton of oily sewage through a small-aperture fine-mesh rotary screen; heating the oily sewage and percolate to 70 ℃ by steam, and then separating 0.05 ton of oil and fat, 0.48 ton of sewage and 0.05 ton of waste residue by a three-phase centrifuge; finally, mixing the sewage and the waste residue with the organic waste, and then entering a stirring tank to obtain pretreated kitchen waste; adding thickener (xanthan gum, carrageenan and agar at a mass ratio of 0.01:0.1:0.1) into pretreated kitchen waste according to a mass percentage of 0.2%, and stirring and mixing to obtain culture slurry of 0.932 ton;

2. conveying the culture slurry to a culture basket (6 m long, 2m wide and 30cm high; an anti-corrosion carbon steel frame, a glass grating plate is paved at the bottom, and an 80-mesh nylon net is paved on the grating), wherein the feeding amount of each basket is 600 kg, and the black soldier fly seedlings hatched and cultured for 5 days are put into the culture basket containing the slurry material according to the amount of 0.1g black soldier fly eggs per kg of the culture slurry; the method comprises the steps of lifting, transferring and stacking the materials into a totally-enclosed cultivation room (a reinforced concrete frame structure, fresh air deodorization facilities are arranged at the top of the cultivation room and at two sides of a wall body, fresh air quantity is slightly smaller than deodorization air quantity, a micro negative pressure environment of an inner space is kept to prevent odor from overflowing, condensing heat exchangers are arranged at two sides of the wall body, 15 ℃ cold water circulation is conducted, condensation and dehumidification are carried out on a cultivation area, drainage ditches are arranged at two sides of the wall body, and condensed water is conveniently discharged), and stacking the materials to form a height of 20 layers; the temperature of the cultivation area is controlled to be about 35 ℃, and the hermetia illucens bodies and the worm manure are harvested after the cultivation period is 7 days.

Example 2

1. Pouring 1 ton of collected kitchen waste into a discharge hopper, and filtering after natural sedimentation to obtain 0.58 ton of percolate and 0.42 ton of solid waste; conveying solid garbage into a horizontal rotary screen through a shaftless auger, continuously spraying hot water at 50 ℃ (the hot water is recycled water after kitchen garbage percolate is heated and subjected to three-phase centrifugal deoiling), washing off grease attached to the surface of the kitchen garbage, screening out 0.035 tons of inorganic garbage through a large-aperture screen in the rotary screen, and separating out 0.385 tons of organic garbage and 0.59 tons of oily sewage through a small-aperture fine-mesh rotary screen; heating the oily sewage and percolate to 70 ℃ by steam, and then separating 0.045 ton of oil and fat, 0.485 ton of sewage and 0.06 ton of waste residue by a three-phase centrifuge; finally, mixing the sewage and the waste residue with the organic waste, and then entering a stirring tank to obtain pretreated kitchen waste; adding thickener (xanthan gum, carrageenan and agar) at a mass ratio of 0.05:0.5:0.5 into pretreated kitchen waste at a mass percentage of 1%, and stirring and mixing to obtain culture slurry of 0.94 ton;

Example 3

1. Pouring 1 ton of collected kitchen waste into a discharge hopper, and filtering after natural sedimentation to obtain 0.51 ton of percolate and 0.48 ton of solid waste; conveying solid garbage into a horizontal rotary screen through a shaftless auger, continuously spraying hot water at 70 ℃ (the hot water is recycled water after kitchen garbage percolate is heated and subjected to three-phase centrifugal deoiling), washing off grease attached to the surface of the kitchen garbage, screening out 0.033 ton of inorganic garbage through a large-aperture screen in the rotary screen, and separating out 0.457 ton of organic garbage and 0.52 ton of oily sewage through a small-aperture fine-mesh rotary screen; heating the oily sewage and percolate to 70 ℃ by steam, and then separating 0.055 ton of grease, 0.418 ton of sewage and 0.057 ton of waste residue by a three-phase centrifuge; finally, mixing the sewage and the waste residue with the organic waste, and then entering a stirring tank to obtain pretreated kitchen waste; adding a thickener (the mass ratio of the mixture of xanthan gum, carrageenan and agar is 0.1:0.4:0.5) into the pretreated kitchen waste according to the mass percentage of 1%, and stirring and mixing to obtain 0.942 ton of culture slurry;

Comparative example 1

The invention patent CN201510246522.4 is used for treating kitchen waste by using a method for treating kitchen waste sewage by using hermetia illucens.

1. The liquid kitchen waste and sewage were mixed with 25% by weight of wheat bran, stirred to a viscous state, and approximately 70% of the sewage was fixed in a water-absorbing material (wheat bran).

2. The thick water-absorbing material (wheat bran) is pumped into the hermetia illucens culture tray in a culture workshop through the feeding machine, the material thickness is between 6 cm and 10cm, the hermetia illucens larvae begin to eat nutrient substances in the hermetia illucens, the culture tray is made of gauze made of nylon, stainless steel and other materials, ventilation is facilitated, evaporation of water in the culture tray can be accelerated, the evaporation process can release about 20% of water, and the hermetia illucens larvae eat and convert about 5% of water.

3. As the culture tray adopts the permeable gauze structure, redundant moisture generally seeps out from the culture tray and drips to the lower part, if the culture tray is multi-layer, the seeped moisture can lead to the surface water accumulation of a culture workshop, therefore, a fermentation bed with the thickness of 15-30cm is required to be manufactured on the surface of the lower part of the culture tray, the material of the fermentation bed is selected from conventional sawdust and other plant powder, and EM bacteria are regularly sprayed, so that the seeped sewage from the culture tray drips on the fermentation bed, and beneficial microorganisms in the fermentation bed can degrade nutrient substances in the sewage, thereby preventing sewage from flowing four times and giving off odor. About 5% of the moisture can be absorbed by the fermentation bed.

4. The cultivation shop is equipped with ventilation and exhaust facilities so that the replacement frequency (time interval for total replacement of air in the cultivation space) is controlled to be not more than 2 hours and the relative humidity of the intake air is not more than 80%. The exuded water from the gauze culture tray is gradually dropped to the culture tray on the next layer, finally dropped to the fermentation bed on the ground, the fermentation bed absorbs and decomposes the sewage, a ventilation and exhaust device in the culture workshop is started to exhaust the air rich in a large amount of water, dry fresh air is introduced, and the materials in the culture tray are quickly dried through the feeding activity of the black soldier fly larvae. When the humidity of the materials in the culture tray is less than 70%, a proper amount of kitchen waste and sewage can be directly sprinkled on the culture tray, the residual wheat bran and black soldier fly larvae in the culture tray directly absorb and digest the sewage, and meanwhile, the superfluous exuded sewage still can drop on a fermentation bed on the ground, so that the environment is not polluted; when the black soldier fly larvae are close to maturity, wheat bran and larvae can be separated through a screen under the condition that the humidity is less than 65%, the larvae are used for being processed into feed products, the screened wheat bran can be reused, and kitchen waste and sewage can be continuously treated.

Comparative example 2

The kitchen waste is treated by the method of the embodiment 1 in the method for treating the perishable garbage leachate by using hermetia illucens in the invention patent CN 202011050652.8.

1. Lactic acid bacteria, bacillus subtilis and bacillus amyloliquefaciens (85 parts by mass of the perishable garbage leachate, 10 parts by mass of lactic acid bacteria, 10 parts by mass of bacillus subtilis and 10 parts by mass of bacillus amyloliquefaciens) are respectively added into the perishable garbage leachate, materials are uniformly mixed by using a stirrer, the rotating speed of the stirrer is 20rmp/min, the temperature of the materials is controlled to be 36 ℃, and the fully mixed materials are subjected to constant-temperature sealing fermentation for 12 hours to obtain the fermentation liquor of the perishable garbage leachate. The solid premix is prepared from the following raw materials in parts by weight: 50 parts of wheat bran, 20 parts of rice bran, 40 parts of bean dregs, 25 parts of vinasse and 15 parts of saw dust. The leachate of the perishable garbage is fermented and then is evenly mixed with the solid premix, and the leachate is fermented and prepared into leachate feed (60 parts by mass of fermentation liquor prepared from the leachate of the perishable garbage, 30 parts by mass of solid premix).

2. Uniformly distributing the percolate feed by a plunger pump in a treatment workshop, controlling the thickness of single distribution to be 5cm, inoculating 20000 black soldier fly larvae with weight of more than 10mg at 3 ages according to the inoculum size of 10kg of the percolate feed, timely stirring the percolate feed according to the temperature of the percolate feed in the feeding process to dissipate heat, controlling the temperature of the material to be below 45 ℃ and the thickness of the percolate feed to be 3cm; the black soldier flies with the body weight of more than 80mg are sieved out to obtain white body surfaces, the body length of the black soldier flies is more than 2 cm. The treatment workshop adopts negative pressure to pass through and is provided with deodorizing equipment, the ventilation quantity is 9 times per hour, the environment temperature is controlled to be constant, the temperature is 26 ℃ in winter, and the temperature is 30 ℃ in summer.

Comparative example 3

The invention patent CN202111573899.2 is adopted to treat the kitchen waste by a kitchen waste recycling treatment method.

1. After removing impurities in the kitchen waste raw materials, conveying the kitchen waste raw materials into a sorting machine for crushing, sorting and pulping, conveying the prepared slurry into a three-phase centrifugal machine for oil extraction treatment, discharging crude oil into a crude oil tank, and further preparing biodiesel or other chemical products according to requirements. After oil extraction by a three-phase centrifuge, 107 tons of organic slurry and 10 tons of kitchen solid residues with water content of 62% are produced, the kitchen solid residues and the insect manure can be used as organic fertilizers after composting fermentation, the water quality of the organic slurry after oil extraction is 97000mg/L, TN is 2280mg/L and SS is 17600mg/L, and the organic slurry after oil extraction and dry wood dust or straw are uniformly mixed according to the mass ratio of 30:1, or half of each of the dry wood dust and straw is uniformly mixed with the organic slurry.

2. The evenly mixed feed liquid is sent into a plate-frame type membrane filter press, the feed pressure is 0.5Mpa, the pressure between plates and frames is kept at 20Mpa, the pressure maintaining time is 60min, 100t filtrate and filter pressing solid slag with the water content of 65% are respectively collected, the water quality of clear liquid after filter pressing is COD63100mg/L, TN is 123mg/L and SS is 150mg/L. And adding the black soldier fly larvae and filter-pressing solid residues into the breeding box, adding 2.6kg of filter-pressing solid residues into 1kg of black soldier fly larvae according to the mass ratio, breeding the black soldier fly larvae at the temperature of 30 ℃ and the relative humidity of the environment for 10 days, sieving and collecting the larvae after the larvae are bred into adults, wherein the sieved adults are used as protein feed, the insect protein is sold as animal feed, and the rest of insect manure is used as an organic fertilizer raw material.

3. The filtrate is sent to a nanofiltration system for membrane concentration treatment, the operation pressure of the nanofiltration system is 50MPa, 80 tons of nanofiltration liquid and 20 tons of nanofiltration concentrated liquid are obtained, wherein the water quality of the nanofiltration liquid is 34600mg/L, the TN is 390mg/L, the water quality of the nanofiltration concentrated liquid is 95100mg/L, and the TN is 4200mg/L. The nanofiltration concentrated solution is used as a culture medium of the mycoprotein, and according to mass percent, the composite strain adopts 32% candida utilis, 25% bacillus cereus and 43% geotrichum candidum, 20 tons of the nanofiltration concentrated solution is inoculated with 0.62 ton of the composite strain, the fermentation is carried out for 19 hours at 28 ℃, when the pH value is 3.8, the fermentation is finished, and the fermentation is carried out after centrifugation, filtration and drying at 40-45 ℃ until the moisture is less than or equal to 19.2%, and the storage is carried out after packaging. 80 tons of nanofiltration clear liquid is sent to a reverse osmosis system for membrane filtration treatment, the operating pressure of the reverse osmosis system is 60MPa, the reverse osmosis concentration of 38.4 tons and the reverse osmosis clear liquid of 41.6 tons are obtained after the treatment, wherein the water quality of the reverse osmosis clear liquid is 73mg/L of COD, 22mg/L of TN and 67000mg/L of COD, the use requirement of the reverse osmosis concentrated liquid as a carbon source can be met, and the reverse osmosis concentrated liquid is sent to a storage tank and used as an external carbon source in the biochemical treatment process of the percolate.

Experimental example:

the same mass (1 ton) of kitchen waste was treated by the methods of examples 1-3 and comparative examples 1-3, and the required cost and the harvested hermetia illucens, the produced sewage, etc. were counted, and the results were as follows:

sequence number	Processing cost (Yuan)	Harvested hermetia illucens (kilogram)	Insect manure (kilogram)	Treatment time (Tian)
					Example 1	215	140	216	7
Example 2	285	150	282	7
					Example 3	387.5	151	273	7
Comparative example 1	575	187	325	8
					Comparative example 2	609	132	336	8
Comparative example 3	140	35	85	10

Claims

1. The method for treating the full amount of kitchen waste by using the hermetia illucens is characterized by comprising the following steps of:

s1, adding a thickener with the mass percentage of 0.01-1.0% into pretreated kitchen waste to obtain culture slurry; the pretreatment of the kitchen waste is to remove grease and inorganic matters; the thickener is one or more of xanthan gum, carrageenan, agar or SAP resin;

2. The method for treating the full amount of kitchen waste by using hermetia illucens as claimed in claim 1, wherein the pretreatment of the kitchen waste in the step S1 is prepared by the following method:

(1) Filtering kitchen waste to obtain percolate and solid waste;

3. The method for treating a full amount of kitchen waste with hermetia illucens as claimed in claim 2, wherein in the step (2), the screen washing is performed by spraying water at 50-70 ℃.

4. The method for treating a full amount of kitchen waste with hermetia illucens as claimed in claim 3, wherein the water is the sewage obtained in the step (3).

5. The method for treating a full amount of kitchen waste with hermetia illucens as claimed in claim 2, wherein in the step (3), the heating temperature is 65-75 ℃.

6. The method for treating full-scale kitchen waste by using hermetia illucens according to claim 1, wherein the thickener is a mixture of xanthan gum, carrageenan and agar with a mass ratio of 0.05-0.2:0.1-0.8:0.1-1.

7. The method for treating full-scale kitchen waste with hermetia illucens according to claim 6, wherein the mass ratio of xanthan gum, carrageenan and agar in the thickener is 0.01:0.1:0.1.

8. The method for treating full-scale kitchen waste with hermetia illucens as claimed in claim 1, wherein in the step S1, the viscosity of the culture slurry is not less than 1000cp, and the Chemical Oxygen Demand (COD) is not less than 50000mg/L.

9. The method for treating the full-scale kitchen waste by using the hermetia illucens as claimed in claim 1, wherein in the step S2, the hermetia illucens larvae are obtained after hatching and culturing the hermetia illucens eggs for 5 days.

10. The method for treating a full amount of kitchen waste with hermetia illucens according to claim 1, wherein the hermetia illucens larvae are added in an amount of 0.1g of hermetia illucens eggs per kg of the culture slurry.