302 results about "Hermetia illucens" patented technology

The invention discloses a method for artificially feeding black soldier flies, which comprises the following steps of: feeding adults, collecting eggs and incubating, feeding larvae, pupating and the like. The provided method for artificially feeding black soldier flies is a mature method for artificially feeding black soldier flies. The method is easy and effective, is easy to operate, is suitable for mass propagation and production of the black soldier flies, and lays a foundation for effectively utilizing the black soldier flies, such as treating refuse, changing waste into treasure or using larvae as feeds or baits.

An apparatus and method of inducing black soldier flies to emerge, mate and lay eggs is provided. The method involves exposing at least one male black soldier fly and at least one female black soldier fly to artificial light in an enclosed space. The artificial light includes at least one wavelength in a visible spectrum and at least one wavelength in an ultraviolet spectrum.

The invention relates to a black stratiomyiid breeding device and method. The device comprises two spaces which are divided by a separation plate, wherein the space A is an adult breeding chamber and the space B is a larva breeding chamber; ventilation windows are arranged on the outer side faces of the adult breeding chamber and the larva breeding chamber; a timing switching door is arranged at the upper part of the separation plate; a triangular adult ovulation mechanism is arranged in the middle of the separation plate; the triangular adult ovulation mechanism is composed of an ovum receiving box and one layer of insect attractant coating on the upper surface of the ovum receiving box; the ovum receiving box is arranged in the larva breeding chamber; an ovum rotary collection device is arranged under the ovum receiving box; an animal excrement storage groove is formed in the bottom of the larva breeding chamber; the animal excrement storage groove is arranged under the ovum rotary collection device; the space A is a space which is composed of a partial transparent material at least; and the space B is a space composed of a light shielding material. By using the device to breed black stratiomyiid, the breeding efficiency is improved and the automatic collection and growth of ova are realized and the breeding cost is also reduced.

The invention provides a breeding method of selenium enriched black soldier fly larvae. Inorganic selenium or organic selenium is added into feed of the black soldier fly larvae and the concentration of selenium content in the feed of the black soldier fly larvae is controlled at 10 to 80 mg every kg. The selenium is added into the breeding feed of the black soldier fly larvae to obtain the high selenium content of black soldier fly larva products and accordingly the functional value of the black soldier fly larvae is significantly improved. The selenium is combined with protein and polysaccharide organically in the black soldier fly larvae after bioconversion and accordingly the toxic and side effect and the gastrointestinal stimulation of the chemical selenium are eliminated and the selenium can be absorbed and utilized efficiently and securely.

The invention discloses a method for treating and utilizing kitchen wastes and straws by using black soldier fly larvae. The method comprises the following steps: mixing crushed straws with slurry prepared from the kitchen wastes, and adding bacillus subtilis and bacillus licheniformis to form mixed feed; paving the mixed feed in a black soldier fly larvae breeding trough for breeding the black soldier fly larvae; sieving the black soldier fly larvae and feed residues in the black soldier fly larvae breeding trough when the larvae enter the pre-pupa stage; directly using the black soldier flylarvae as feed for fishes and poultry or preparing the black soldier fly larvae into dried insects to serve as a protein feed raw material; fermenting and composing the feed residues to obtain organicfertilizer by an aerobic composting process. According to the method disclosed by the invention, cooperative treatment and utilization of the kitchen wastes and the straws can be realized; and the kitchen wastes and the straws meet the growth demand of the black soldier fly larvae and are transformed into animal protein feed and the organic fertilizer, so that a disposal method is greatly simplified and the efficiency is improved.

The invention discloses a method for treating livestock and poultry manure by using Hermetia illucens; the method comprises the steps of 1) mixing well livestock and poultry manure, an auxiliary material and livestock and poultry urine, wherein the mixture has humidity of 45-70%, the auxiliaries include wheat bran, straws or oil cake, the weight ratio of the livestock and poultry manure to the auxiliary material, to be specific, the livestock and poultry manure to wheat bran or oil cake, is 10:(3-5), or the weight ratio of the livestock and poultry manure to straws is 10:(1-3); 2) adding larvae of Hermetia illucens, adding the mixture, and feeding to third instar; 3) adding 25-40 kg of the mixture each day for feeding; 4) adding 40-60 kg of the mixture each day for feeding; 5) adding 60-80 kg of the mixture each day for feeding until a six-instar prepupal stage. An ecological recirculating culture method for treating livestock and poultry manure by using Hermetia illucens is also disclosed; Hermetia illucens is used as a feed in poultry or aquatic culture, the excrement of Hermetia illucens is used in earthworm culture, earthworms is used as a feed, poultry excrement is treated with Hermetia illucens, and the excrement of earthworms is made into fertilizer for planting industry.

The invention discloses equipment and a method for treating kitchen waste by using black soldier flies. The equipment comprises a draining conveyor, a first dehydrator, a spiral conveyor, a crusher, a second dehydrator, a feeding pump, breeding boxes, a discharge conveyor, a screening machine and a dryer. The draining conveyor is successively connected to the first dehydrator, the spiral conveyor, the crusher, the second dehydrator and an inlet of the feeding pump; an outlet of the feeding pump separately feeds treated kitchen waste into a feed inlet of at least one breeding box, and a discharge port of the at least one breeding box is successively connected to the discharge conveyor, the screening machine and the dryer. The method comprises the following steps of: feeding black soldier fly larvae which are 4 days old with kitchen waste for 6 days by using the equipment;, then successively screening and drying the black soldier fly larvae, and quantitatively adding the kitchen waste by using the equipment of treating kitchen waste by using black soldier flies. Therefore, on the one hand, the handling capacity of the kitchen waste is maximized, and on the other hand, the black soldier fly larvae eat the kitchen waste thoroughly.

The invention belongs to the technical field of environmental protection and relates to a kitchen waste treatment method and an organic fertilizer prepared thereby. The kitchen waste treatment methodprovided by the invention comprises the following steps: (a) pre-treating kitchen wastes; (b) breeding hermetia illucens population, namely hatching hermetia illucens eggs into larva, remaining partial larva to pupate, mating and spawning to maintain the breeding cycle of the population, and providing enough eggs and treated larva for kitchen waste treatment; (c) treating the kitchen wastes by primary digestion of the hermetia illucens, namely inoculating the hermetia illucens eggs into a breeding material, digesting the kitchen wastes in the process of growing the eggs into the larva, and transforming the kitchen wastes into hermetia illucens proteins and fecula; (d) performing aerobic composting and secondary digestion, namely performing aerobic fermentation and aging and after-ripeningon the egg excrements and residual wastes obtained in the step (c), thereby obtaining the organic fertilizer. The biological hermetia illucens digestion technology and the aerobic composting technology for the kitchen wastes are organically coupled, the advantages are complemented with each other, and the resource utilization rate is improved.

The invention discloses a method for treating excrement by using hermetia illucens. The method comprises the following steps: pretreating the excrement, namely proportioning a leaven with a degradation agent to prepare a microbial inoculum; preparing the excrement; weighing the microbial inoculum and sugar-containing coarse grain powder; mixing the sugar-containing coarse grain powder with the microbial inoculum, then adding the mixture into the excrement, stirring continuously, and performing sealed treatment on the mixture in a fermentation tank; inoculating larvae, namely horizontally paving the pretreated excrement, and inoculating the hatched hermetia illucens ova into the excrement; and performing material-worm separation, namely adding sawdust or / and rice bran powder into the material-worm mixture, and vibrating to separate out material residues and fresh worms, thereby obtaining an organic fertilizer prepared by the method. According to the method for treating the excrement by using the hermetia illucens and the organic fertilizer prepared by the method, the excrement is treated into a semi-fluid stage beneficial for eating by insect larvae, other nutrients are not needed, the treated excrement can be used as the organic fertilizer which is high in conversion rate, and meanwhile, one ton of the excrement is high in larva yield, so that the cost is reduced, the environmental pollution is reduced, and a high-value organic fertilizer rich in insect protein and nutrition is obtained.

The invention provides a process for biotransformation of kitchen waste through hermetia illucens. The process includes the following steps that ingredients are added into the sorted and smashed kitchen waste, the relative humidity is adjusted, processing materials are obtained, EM bacteria are added, and a mixture is obtained after even mixing is carried out; and the mixture is paved on a cultivation disc, five-day-age larva of the hermetia illucens is added, feeding is carried out at the temperature ranging from 28 DEG C to 32 DEG C and the relative humidity ranging from 70% to 90%, and after feeding is completed, hermetia illucens mature larva and remnant materials are separated. According to the process, one-time putting of the kitchen waste can be achieved, the growth requirement of the hermetia illucens larva can be met, the processing process can be greatly simplified, and efficiency is improved.

The invention provides a chicken manure treatment method and system based on hermetia illucens. The treatment method includes the following steps that 1, a chicken manure falling area and a hermetia illucens treatment pool are arranged at the position of a hencoop, so that chicken manure in the hencoop falls into the hermetia illucens treatment pool through the chicken manure falling area, and the hermetia illucens treatment pool contains hermetia illucens larvae; 2, at a preset temperature, chicken manure in the hermetia illucens treatment pool is ventilated; 3, when the treated chicken manure reaches the preset condition, larva and manure separation is conducted, and organic fertilizer and hermetia illucens commodity worms are obtained. By means of the chicken manure treatment method based on the hermetia illucens, the chicken manure in the hencoop can fall into the hermetia illucens treatment pool directly through the chicken manure falling area, freshness and the nutrition degree of the chicken manure can be maintained, and a good treatment effect can also be achieved. The chicken manure falling into the hermetia illucens treatment pool is directly treated by the hermetia illucens instantly, and treatment efficiency is high.

The invention discloses a method which is used for processing pig excrement with black soldier fly larvae and easy and convenient to conduct. Excrement and urine excreted by pigs leak from an excrement leaking plate of a pig toilet and fall into an excrement tank below, the solid pig excrement is eaten and digested by the black soldier fly larvae and then converted into insect protein, and the liquid pig urine leaks into a bacterium bed below a nylon gauze element and is digested and processed by beneficial microorganisms in the bacterium bed. After the black soldier fly larvae mature, the black soldier flies are caught by removing the nylon gauze element, a new nylon gauze element is installed, and new black soldier fly larvae are added for circulation processing. In this way, a large amount of pig excrement and pig urine produced dispersedly can be processed with low cost, without pollution and resourcefully, and a clean and safe pollutant processing scheme is provided for intensive breeding large and medium pig farms.

The invention provides a method using Hermetia illucens L. to biologically degrade kitchen waste. The method includes: the kitchen waste is crushed and mixed with auxiliary materials to obtain mixed feed, the mixed feed is flatly laid into a cultivation box, Hermetia illucens L. larvae are inoculated into the mixed feed, the Hermetia illucens L. larvae eat the mixed feed to treat the kitchen waste, the Hermetia illucens L. larvae and Hermetia illucens L. larva excrement are screened when the Hermetia illucens L. larvae eat up the mixed feed in the cultivation box and are 7-8 days old, the dried Hermetia illucens L. larvae can be used as biological feed, and the excrement can be used as fertilizer after fermentation. The method is efficient, environmentally friendly and high in economic benefits.

The invention provides a black soldier fly cultivation system and method. The cultivation system comprises a pupation device and an adult black soldier fly cultivation chamber. The pupation device is used for incubating black soldier fly prepupa into black soldier fly pupa, and pupation media with water is disposed inside the pupation device. The adult black soldier fly cultivation chamber is used for cultivating the black soldier fly pupa into adult black soldier fly. The method has the advantages that pupation is performed by using the pupation media with water after the pupation environment is researched, the pupation time is shortened from 7 days to 2-3 days, reproduction time of black soldier fly is shortened greatly, and large-scale neat pupation and batch pupa collection are achieved.

The invention discloses a method for breeding black soldier fly larvae. The method includes steps of S1, uniformly mixing livestock and poultry feces which is fermented at the high temperatures, wheatbran, humus, brown sugar and clostridium butyricum with one another according to a mass ratio to prepare black soldier fly breeding bait; S2, breeding the larvae, to be more specific, inoculating 1-2g of newly hatched black soldier fly larvae in every 1 kg of black soldier fly breeding bait, carrying out culture on the newly hatched black soldier fly larvae at the temperatures of 25-35 DEG C for6-8 days and carrying out screening to obtain the mature black soldier fly larvae. The mass ratio of the livestock and poultry feces to the wheat bran to the humus to the brown sugar to the clostridium butyricum is 900-1000:40-60:20-40:4-5:1-3. The method has the advantages that growth and ingestion of the black soldier fly larvae can be promoted by the aid of the method, the livestock and poultry feces consumption speeds can be increased, the culture cycle of the black soldier fly larvae can be shortened, the protein content of black soldier fly can be increased, the black soldier fly larvaeobtained by the aid of the method can be used as a raw material for active feed or protein-source feed, and the method has a great application prospect.

The invention discloses a Hermetia illucens L. breeding integrated device and a breeding method. The device comprises a pupa chamber, a larva chamber and an imago chamber, all of which are sequentially arranged. The pupa chamber is provided with a pupa chamber light shielding channel and is communicated with the larva chamber and the imago chamber in order to enable broken pupas in the pupa chamber to fly to the imago chamber with sufficient light. The larva chamber is provided with multiple breeding cabinets, each breeding cabinet is provided with a separation slope for enabling 5-6-age larvae to climb out of the larva chamber, the separation slopes are arranged at the corners or the middles or any positions of the breeding cabinets, the ends of the separation slopes are connected with separation channels, and the larvae drop into the pupa chamber through the separation channels via the pupa chamber light shielding channel. The imago chamber is used for mating and oviposition of imagoes obtained after pupa breaking and growth of 1-2-age larvae. The pupa chamber, the larva chamber and the imago chamber are integrated, the whole growth process of Hermetia illucens L. is convenient to monitor, the breeding manual operation and management difficulty is lowered, and breeding efficiency is improved.

The invention belongs to the fields of foods or bioenergy and develops a new oil source, i.e. black soldier fly larvae as an oil-crop insect. Oil can be obtained by using a compression method (larvae is fed into a screw-type press while hot to press oil out) after black soldier fly adult and larvae are dried by hot wind or microwave. The oil can be used as raw oil for eating, chemical industry and biodiesel. The oil content of the black soldier fly larvae is 30-35 percent, through analyzing the nutritious components of the oil, and oil extracted from the black soldier fly larvae contains various unsaturated fatty acids needed by human bodies, thereby being high-quality health oil. The black soldier fly larvae has short growth period which is only 20-30 days and very small floor area, can be cultured under the condition of high density, reaches the oil production per mu of 4t / mu.year, can be carried out in an industrial factory building without occupying land area, contains no toxin, is safe and reliable, and has simple extraction process.

The invention discloses a method for performing pig manure resource treatment by utilizing hermetia illucens, belonging to the field of solid waste treatment. The method comprises the following technological steps: (1) mixing pig manure with oilseed meals so as to adjust the water content of pig manure; (2) performing primary fermentation to the mixture by adopting bacillus subtilis, and further fermenting with brewer yeast; (3) feeding black soldier fly Hermetia illucens for raising according to a certain proportion; and (4) after the raising period is finished, collecting the black soldier fly Hermetia illucens and ooze. The method is simple to operate, and fast for pig manure resource treatment process. After conducting the above technological treatment, pig manure and oil seed meals are converted into black soldier fly Hermetia illucens and excreta ooze thereof, the residual tetracycline antibiotics (oxytetracycline, chlorotetracycline and tetracycline) in the pig manure cannot be detected in the black soldier fly Hermetia illucens and ooze. The method not only can solve the problems of pig manure environment pollution, the antibiotics residues, human health damage and the like, but also can provide black soldier fly Hermetia illucens and ooze with rich nutrients for feed and fertilizer industries.

The invention discloses an infected dead livestock disposal method. The method comprises the steps that after infected dead livestock is subjected to high-temperature sterilization and degreasing, auxiliary materials are added into meat slurry, and then the meat slurry is prepared into nourishment for breeding black soldier flies or houseflies through the enzymatic degradation step or the fermentative degradation step and the like, and utilization by the black soldier flies is facilitated. Through the process, the infected dead livestock is converted into larvae or frass of the black soldier flies or the houseflies; the larvae can be used as ingredients of high-protein feed, and the frass can be used for preparing high-quality organic fertilizer. Through the method, the infected dead livestock pollution source can be eradicated completely, and insect protein and the organic fertilizer with the high additional value can be obtained.

The invention discloses a zero emission process for treating kitchen wastes. The zero emission process comprises the following steps: (1) performing solid and liquid separation on the kitchen wastes by using a rotating fine screen, and feeding organic matters obtained after solid and liquid separation into a hermetia illucens breeding system; (2) feeding a liquid phase obtained after solid and liquid separation into an oil and water separating device to perform oil and water separation, and reutilizing the separated crude oil as a raw material; (3) feeding a liquid phase separated by the oil and water separating device into an anaerobic digestion system to perform anaerobic treatment, and transforming organic matters in the liquid phase into marsh gas by using the anaerobic digestion system and then reutilizing the marsh gas; (4) feeding water discharged from the anaerobic digestion system into a sewage treatment system to perform biochemical treatment, removing organic matters and performing biological removal of nitrogen; (5) feeding the water discharged from the sewage treatment system into an ultra-filtration system for further treatment; (6) sequentially feeding the water discharged from the ultra-filtration system into a nano-filtration system and a reverse osmosis system to perform advanced treatment, removing refractory organic matters and then discharging. The zero emission process for treating kitchen wastes, disclosed by the invention, is capable of realizing reclamation of kitchen waste treatment.

The invention provides a method for utilizing hermetia illucens to dispose feces of poultry and livestock. The method includes the steps of (1) collecting the feces of the poultry and livestock, stirring and mixing sugar-contained coarse food grain with a fungicide, then adding the mixture into the feces for stirring, conducting sealing treatment on the mixture in a fermentation pond for 12-24 hours to obtain a raw material for feeding, and then uniformly spreading out the raw material for feeding; (2) inoculating 6-8-day-old larvae of hermetia illucens into the raw material for feeding, wherein the raw material for feeding is supplied to and eaten by the larvae of hermetia illucens, and bioconversion is carried out for 6-10 days; (3) after the raw material for feeding is converted to small loose granular residues, conducting separation of the larvae and the residues to obtain the larvae of hermetia illucens and remaining residues; (4) using the larvae of hermetia illucens as feed or high-protein insect larvae, and adopting the remaining residues for making efficient solid organic fertilizer. By means of the method, the feces can be quickly and efficiently fermented and degraded tothe degree suitable for being eaten by the insect larvae, efficient conversion of the feces can also be achieved without adding other nutrients, a high yield of larvae can be obtained, and the cost is reduced to a great extent.

The invention discloses a hermetia illucens L. breeding and collecting device and method. The device comprises a larva collecting device, a pupa chamber, a larva chamber and an imago chamber which are sequentially arranged; the larva chamber is provided with light-proof channels which are communicated with the pupa chamber and the imago chamber, a movable plate is arranged at the bottom of the pupa chamber, the imago chamber is internally provided with egg filters, the larva chamber is provided with breeding cabinets formed by bottom plates and side walls perpendicular to the bottom plates in an enclosing mode, the bottom plate of each breeding cabinet is provided with a movable plate, and the egg filters are located above the movable plates of the breeding cabinets; eggs on the egg filters fall into different breeding cabinets after the movable plates are opened, and each breeding cabinet is provided with separate slopes which are communicated with the light-proof channels through separate channels. According to the hermetia illucens L. breeding and collecting device and method, the larva collecting device, the pupa chamber, the larva chamber and the imago chamber are integrated together, the whole growth process of the hermetia illucens L. from the eggs to imagoes can be observed conveniently, and larvae of the hermetia illucens L. are easy to collect. Breeding and collecting of the hermetia illucens L. are conducted by means of the device, manual operation and management difficulty of breeding can be reduced, and the breeding efficiency is improved.

The invention belongs to the field of biotechnologies, and relates to a breeding chamber, in particular to a breeding chamber for cultivating hermetia illucens. The breeding chamber comprises an outer layer cage chamber, an inner layer cage chamber, potted plants, a sunshade net, an iodine-tungsten lamp for providing light, an automatic spraying device for keeping humidity in the breeding chamber and a heater for keeping temperature in the breeding chamber to be constant. By the utilization of the breeding chamber, hermetia illucens can be massively bred at any season, labor cost is low, and the egg laying amount is large.

The invention discloses an ecological pig feed, and relates to the technical field of processing of livestock feeds. The ecological pig feed is prepared from the following raw materials: mulberry leaf powder, traditional Chinese medicine powder, a mineral feed, a protein feed, vegetable oil, a microorganism yeast, inorganic salt, barleygreen, straw pulp, hermetia illucens and vegetable pulp. The preparation process of the ecological pig feed is as follows: respectively grinding the protein feed, hermetia illucens and mineral feed into fine materials, uniformly mixing the fine materials with the mulberry leaf powder, traditional Chinese medicine powder, vegetable oil, microorganism yeast, barleygreen, inorganic salt, vegetable pulp and straw pulp, drying at the temperature of 45-60 DEG C, grinding, and treating by a feed machine to obtain the ecological pig feed. The ecological pig feed is comprehensive in nutrients, high in feed conversion ratio, enhanced in immunocompetence, increased in growth speed, improved in meet quality, suitable for raising a feeder pig to a fattening stage, applicable to raising cow or sheep to a fattening stage, and also available to raising chickens or ducks to a fattening stage.

The invention discloses a method for completely converting poultry excrement step by step through hermetia illucens and potosia brevitarsis. A small amount of saw powder is added to the poultry excrement to be mixed, the water content of the poultry excrement is adjusted, microbial inoculums are added for fermentation for 12-24 hours, hermetia illucens larvae are introduced, and conversion treatment is conducted. Commodity larvae are separated from materials, larva bodies are high-protein insects and can be used as feed or deeply processed, after waste is fermented, potosia brevitarsis larvae are introduced for further conversion treatment, and potosia brevitarsis larva bodies and particle frass are obtained. The method is high in treatment and conversion capacity and high in efficiency and benefit, the treatment process is low in energy consumption, secondary high-efficiency utilization of the poultry excrement is achieved, two types of produced larvae have high economic value, particle organic fertilizer can be directly used for agricultural production, a great significance is achieved in solving ecological environment pollution and raising incomes of farmers, and thus the method has wide market prospects.

The invention provides a method for preparing cosmetic raw materials from Hermetia illucens larvas. The method comprises the procedures of pretreatment, drying, smashing, screening, supercritical CO2 extraction and separation. The method for preparing the cosmetic raw materials has the advantages of being high in extracting efficiency, free of pollution and residues, environmentally friendly and the like, and extracted worm oil is rich in polyunsaturated fatty acid , has the moisturizing and anti-wrinkle effects and other effects on skin and can be used as the cosmetic raw materials.

The invention discloses a method for feeding hermetia illucens larvae by using kitchen waste. Kitchen waste obtained by front-end classification with a non-technical means is directly mixed with auxiliary materials in a certain proportion to form a feeding material with water content of 64.5%-68% to feed hermetia illucens larvae, and the auxiliary materials are plant fiber type auxiliary materialssuch as wheat bran. Compared with a method for crushing kitchen waste before feeding, the method has the advantages that the humidity of non-degraded residual materials is low, weight is only 2%-6% of the addition quantity, and crushing is more convenient and easier; the utilization rate of hermetia illucens eggs is at least increased by 32%-56.5% as compared with the prior art; the weight of hermetia illucens larvae obtained from every ton of kitchen waste is at least increased by 24%-118% as compared with the prior art, and the kitchen waste can be effectively reduced.

The invention discloses a kitchen garbage resourceful treatment method. Firstly, solid-liquid separation and pretreatment are performed on kitchen garbage through a large-aperture inclined screen; solids are used for hermetia illucens cultivation; liquid further finishes oil-water separation; deep anaerobic fermentation is performed on water phases to obtain biogas; remained biogas slurry is addedin the solids for adjusting the water contents of the solids; and oil phases are added in the solids for balancing nutriment nutrition. The obtained biogas enters a gas oven for drying fresh hermetiaillucens and for drying wetter solids. The kitchen garbage resourceful treatment method can use the kitchen garbage for cultivating the hermetia illucens, uses garbage fermentation products for drying the fresh hermetia illucens, hardly needs additional energy in the garbage treatment process, and has the advantages of environmental protection, energy conservation and high resourceful utilizationrate.

The invention discloses an application of black soldier fly larvae to a feed for improving meat quality of aquatic products. Black soldier fly larva powder is added to a feed for aquatic products, andthe black soldier fly larva powder is rich in various nutrient components and functional components, so that the intestine environment of the aquatic animals can be improved, the absorption of the nutrient components in the feed by the aquatic animals can be strengthened, meat quality texture indexes of the muscle elasticity, the adhesiveness, the chewiness, the hardness, the adhesiveness, the cohesion, the recoverability and the like, of the aquatic animals of finless eels, pelteobagrus fulvidraco, japanese sea perches and the like are notably improved, and the application has favorable application prospect and market value.

Melanin or inorganic fertilizers are produced from fermentation leachates or from low-cost nutrient-rich solutions. The method for producing the melanin or inorganic fertilizer comprises repetitive trophic cycling in the controlled conditions of primary and secondary bioreactors. Nutrients are cycled between microorganisms such as bacteria, yeast and fungi and black soldier fly larvae, Hermetia illucens. Polysaccharides are partly converted into natural melanins or inorganic fertilizer, which are difficult to biodegrade and hence accumulate in the bioreactors. The method can employ, as a source of nutrients, leachates produced from food waste or from sugar-rich liquid waste of the food industry. These leachates can be used raw or can be augmented with low-cost sugar-rich solutions such as molasses, hydrolyzed cellulose or starch. The method is inexpensive and does not require the use of expensive chemically-defined culture media.