832 results about "Oyster shells" patented technology

The invention relates to a laying hen feed prepared from bran, salt, corn grit, fish meal, ground oyster shells, rice bran, bean dregs and a traditional Chinese medicine feed additive, wherein the traditional Chinese medicine feed additive comprises the following components: honeysuckle, common cnidium fruit, corydalis tuber, small fennel, motherwort, self-heal, houttuynia, baikal skullcap root, dyers woad leaf, dangshen, astragalus root, angelica sinensis, medical stone, eclipta, dodder, barbat skullcap and weeping forsythia. The feed additive provided by the invention has both medicinal and nutritional actions, can prevent diseases and can also improve the production performance; the feed additive can directly sterilize and inhibit bacteria, adjusts the immunity function of of the organism, has non-specific antibacterial action, and greatly improves the survival rate of chicken; and the feed additive eliminates chemical damage to the chicken, can effectively improve the production performance of animals, simultaneously has small toxic side effects and no drug resistance, can effectively improve the egg quality, achieves the requirements of purely natural green food, and can acquire good economic benefit.

The invention discloses a bionic concrete artificial fish reef arranged on the seafloor. According to the fish reef, C40 concrete is used for pouring to form an artificial fish reef base body, the surface of the base body is covered with a protective layer which is composed of cement mortar, biological calcium carbonate and oyster shells, the biological calcium carbonate is made of eggshells, corals, seashells and fishbone and is used as an additive to be added into the cement mortar, the cement mortar mixture is smeared on the surface of the fish reef base body to form cement paste after the biological calcium carbonate and the cement mortar are evenly stirred together, and the oyster shells are inlaid in the cement paste in a convex face outward mode. According to the artificial fish reef, the environment-friendly function, the durable function and the trapping function are integrated, the cement mortar covering layer doped with the biological calcium carbonate and the coating of the oyster shells can attract marine organisms to inhabit, and thus the trapping effect of the artificial fish reef can be better achieved; compared with a traditional concrete fish reef, the artificial fish reef has good waterproof property and chloride ion resistance, surface roughness and alkalinity of the surface of the fish reef are appropriate, bionic performance is achieved, and the fish collecting effect is excellent.

The invention relates to a system and method to reduce perchlorate in wastewater utilizing perchlorate-reducing bacteria, sulfur as an electron donor and mollusk shells as alkalinity agent. Embodiments of the invention include a perchlorate-reduction system comprising a bioreactor unit having perchlorate-reducing media comprising elemental sulfur, oyster shells and a microbial community, and can further include an optional pretreatment unit, wastewater-catchment and / or post-treatment components. Embodiments of the method include multiple steps utilizing the system and additional process steps that achieve enhanced perchlorate reduction.

The invention discloses an artificial ecological barrier reef and relates to an artificial building block suitable for growth of marine organisms. According to the artificial ecological barrier reef, a body is a concrete building block with a vertical penetrating hole, a steel bar or other metal reinforced bars do not exist in the body, micro silicon powder is mixed in the body, the body is a big-end-down table-shaped object, a plurality of holes which penetrate to the vertical penetrating hole and a plurality of concave pits are formed in the side face of the body, fragments of one or more of the organic substances of plants, shells, oyster shells and organism skeletons are added into the body, and parts of the organic substance fragments are exposed on the surface of the body. Cost, conveying, island conditions and bank protection can be integrated, and the requirement for ecological environment protection can be met.

The invention discloses a method for advanced treatment of sewage and an artificial wetland structure to solve the technical problems of low denitrification and dephosphorization effect and high capital construction and operating cost of the traditional sewage treatment system. The treatment method comprises the following steps that: sewage is intercepted by a grate, is subjected to hydrolysis acidification, aeration oxygenation and sedimentation, enters the top of artificial wetland, flows through a sand and gravel filler treatment layer, a lime stone treatment layer, a volcanized rock treatment layer, an oyster shell treatment layer, an active carbon treatment layer and a gravel treatment layer, which are arranged in the artificial wetland, from top to bottom in turn, is collected by a bottom pipeline of the artificial wetland and enters a recycling water tank. The internal structure of the artificial wetland is that: a group of sewage inlet pipes are horizontally arranged at the upper end of a treatment tank and are arranged in a filler reinforced treatment layer in the treatment tank, the sand and gravel filler treatment layer is arranged below the filler reinforced treatment layer, and a sewage outlet pipe is arranged at the bottom of the treatment tank. The invention has the advantages that: the treatment effect is good, the sewage recycling standard is met and the operating cost is low.

The invention discloses a solid cleaning product, which is prepared by the following steps of: grinding natural plant peel, pericarp, husk and shell materials such as shells, durian shells, litchi pericarp, oyster shells, pineapple peels, buckwheat husks, aloe peels, orange peels and cinnamon bark into particles with 20 to 600 meshes serving as scrub materials, and adding one or more scrub materials into a soap base by adopting low temperature saponification technology to prepare the scrub soap. In the process of preparing the scrub soap, surfactants and chemical additives are not added at all, and byproducts are not generated at all, so the scrub soap cannot have any adverse effect on the skin and environment. The pericarp, husk or shell scrub material in the scrub soap can peel off or remove dead skin cells, contains rich natural active ingredients such as polysaccharides, vitamins, tartaric acid and pectin, which have good effects of sterilizing, beautifying, moistening, repairing and resisting ageing on the skin, and has great market application prospect.

The invention relates to an An / O type composite artificial wetland system for the enhanced treatment of low-C / N ratio wastewater. The invention relates to a wastewater treatment apparatus, which is a land treatment apparatus suitable for treating low-C / N ratio wastewater and recycling treated water. According to the An / O type composite artificial wetland system, wastewater sequentially flows through a horizontal subsurface flow wetland and a vertical subsurface flow wetland, effluent water part then flows back into the horizontal subsurface flow wetland, and a dissolved oxygen (DO) gradient is utilized to couple aerobic ammonia-oxidizing bacteria (AOB), nitrite-oxidizing bacteria (NOB) and anammox in the vertical subsurface flow wetland by means of effluent water level regulation in order to enhance the low-C / N ratio wastewater denitrification efficiency of the An / O type composite artificial wetland system. Broken bricks, oyster shells and other packing with large specific surface area, high porosity and good adsorbability are filled in the composite artificial wetland system, consequently, the amount of organisms held by the system is greatly increased, and high phosphorus-and-nitrogen-removing efficiency is guaranteed. The An / O type composite artificial wetland system has the advantages of simple structure, multiple functions, high efficiency, low cost and the like, is easy to operate and manage, can stably operate, and can synchronously remove carbon, nitrogen and phosphorus, the treated effluent water can be directly recycled, landscape plants can be planted on the ground surface, and the An / O type composite artificial wetland system can be combined with ecological construction and city and town greening functions.

The invention relates to a system and method to remove nitrogen, particularly nitrate, from wastewater utilizing denitrifying bacteria, sulfur as an electron donor and mollusk shells as alkalinity agent. Embodiments of the invention include a denitrification system comprising a bioreactor unit, denitrifying media comprising layers of elemental sulfur and oyster shells 3:1 by volume, and can further include a pretreatment unit and additional septic-system and / or wastewater-system components. Embodiments of the method include multiple steps utilizing the system and additional process steps that achieve increased autotrophic denitrification.

The invention relates to a sea cucumber mixed feed and a preparation method thereof, wherein the feed comprises, based on the weight percentage, urgassum thunbergii power 20 to 25 percent; sea mud 20 to 25 percent; sargassum 30 to 35 percent; oyster shells 5 to 6 percent; shrimp meal 2 to 3 percent; fish meal 2 to 3 percent; soybean meal 2 to 3 percent; kelp meal 4 to 5 percent; EM fungus powder 3 to 4 percent; and additional agents 1 to 2 percent; surgassum thunbergii power, sea mud, sargassum, oyster shells, shrimp meal, fish meal, soybean meal and kelp meal are smashed and are then treated by a 100-mesh screening. Smashed raw materials, EM fungus powder and additional agents are mixed in a mixing machine for 15 minutes. The obtained product is the sea cucumber compound feed put in the invention. Compared to the prior art, the invention has the advantages of strengthening the resistance ability to pathogen infection of sea cucumber, improving the growth rate and reducing the death rate or the like.

The biomass organic fertilizer provided by the invention contains the following components of: by weight, 18-34% of animal manure, 1-3% of tea slag, 5-6% of waste vinasse, distiller dried grain and alcohol mash, 2-3% of food waste, 1-2% of coffee slag, 12-13% of aquatic product leftover, 18-20% of livestock meat processed leftover, 1-2% of feather, 3-4% of livestock slaughtered leftover, 17-18% of livestock and poultry shot dead, 1-2% of waste oyster shell, 2-3% of fruit and vegetable residues, 1-2% of bean dregs, 1-2% of pig hair and 1-2% of botanical traditional Chinese herb residue. Through a sampling test, fertilizer efficiency of nitrogen, phosphor and potassium reaches 20-25%. The biomass organic fertilizer provided by the invention greatly improves soil, and has advantages of high activity, high utilization rate, no secondary pollution and green environmental protection.

A method for preparing amorphous calcium phosphate (ACP) and oral care composition containing ACP prepared by the same are disclosed, wherein the method comprises the following steps: (a) cleaning and pulverizing the oyster shells; (b) sintering the oyster shells to obtain a calcium-containing powder; (c) dissolving the calcium-containing powder in water to obtain a calcium-containing solution; and (d) mixing the calcium-containing solution with a other phosphate-containing solution, to produce amorphous calcium phosphate.The method of the present invention not only can simplify the process and reduce the cost, but also can solve the problem of environment pollution resulting from wasted oyster shells. In addition, the ACP prepared in accordance with the method of the present invention further comprises some trace elements, such as strontium (Sr) and fluoride (F), which can improve dental health.

A preparation method of Chinese medicinal herb feed for weaned lambs includes the following steps: medicated leaven, pericarpium citri reticulatae, rhizoma polygonati, cordate houttuynia, radix puerariae, fructus crataegi and medical stone powder are soaked in water for 5 to 8 hours after superfine grinding, the soaked mixture is decocted, the decoction is filtered, and the obtained filtrate is concentrated by 7 to 8 times to obtain a concentrated liquor; alfalfa, corns, bean pulp, bran, bone powder and wheat straws are uniformly mixed to be subjected to superfine grinding to obtain a mixture A; the concentrated liquor is added into the mixture A to be stirred evenly, temperature preservation is performed at the temperature of 50-60 DEG C for 40 minutes, alum powder is added to be stirred evenly, temperature preservation is performed at the temperature of 45 DEG C for 1 to 2 hours; the mixture is cooled to the room temperature after the temperature preservation to obtain a mixture B; calcined oyster shell powder is added into the mixture B, and vitamin complexes and compound minerals are then added into the mixture B after temperature preservation to be made into granulated feed, namely the Chinese medicinal herb feed for weaned lambs. The feed prepared according to the invention can provide sufficient nutrients to weaned lambs, so as to improve the growth performance and immunity of weaned lambs, upgrade the absorption function of intestinal mucosa, and alleviate weaning stress syndrome.

The invention discloses no-antibiotic feed for a piglet. The no-antibiotic feed comprises the following materials: expanded corns, soybean meal, expanded soybeans, flour, whey powder, fish meal, soybean concentrated protein, plasma protein powder, soybean phospholipid, sucrose, glucose, sodium chloride, calcium lactate, calcium dihydrogen phoshate, special enzyme for a baby pig, a detoxication agent, citric acid, sodium butyrate, eucommia bark extract, xylooligosaccharide, lactobacillus, a phagostimulant and compound premix, wherein the phagostimulant contains calcined oyster shell powder, fiveleaf gynostemma herb, lalang grass rhizome, pine needle, denucleated wild jujubes, malic acid, radix glycyrrhizae preparata, royal jelly freeze-dried powder and peony cake meal. The no-antibiotic feed and the preparation process disclosed by the invention have the advantages that by the feed formula, the growth performance and the immunity of the piglet can be obviously improved; and by the mode of proportioned nutrition, the diarrhea and the death rate of the piglet are reduced, the effect of preventing and treating diseases is achieved and the feeding attraction and growth-promoting effects are obvious.

The invention discloses a manufacturing method of a multifunctional humic acid fertilizer with water retention and fertilizer retention functions, which is characterized in that a modified oyster shell powder adsorbent prepared by modifying oyster shells with chitosan under assistance of microwave is compounded with a water-retaining and fertilizer-retaining agent prepared from humate, polyacrylamide and an initiator to prepare the multifunctional humic acid fertilizer with the water retention and fertilizer retention functions, which contains oyster shell powder, chitosan, humate, polyacrylamide, organic acid chelated titanium and urea peroxide.

The invention discloses a method for preparing calcium citrate with oyster shells and fan shells, comprising the following steps: selecting biological calcium sources, oyster shells and fan shells, for fully ashing, using the ash content as raw material, dissolving the raw material with hydrochloric acid having a certain concentration, letting the dissolved raw material react with sodium citrate under water phase conditions at the temperature of 70-100 DEG C to prepare citric acid chelated calcium. The weight ratio of the ash content to calcium citrate, reaction time and reaction temperature are three influencing factors. By optimizing the reaction conditions, a method which has optimal chelating effect and is economical and practical is obtained.

The invention discloses methods for preparing carboxymethyl chitosan magnetic microspheres and adsorbing cadmium in oyster meat by using the carboxymethyl chitosan magnetic microspheres. Carboxymethylchitosan and Fe3O4 nanoparticles are adopted to be dispersed in organic solvent added with emulsifying agent, coprecipitation is formed after adding sodium sulfate, treatment is conducted by using crosslinking agent, and then the carboxymethyl chitosan magnetic microspheres are prepared after washing and drying. Oyster shells are opened for taking out meat, after adding water and beating, the pHis adjusted, then the meat is mixed with the magnetic microspheres so as to adsorb cadmium in the oyster meat, and the used magnetic microspheres can be regenerated after the removal of the cadmium byadded EDTA. The application of the invention can solve the difficult problem of cadmium pollution in the oysters, and promote the effective utilization of shellfish resources.

The invention provides a vegetable, melon and fruit degerming cleaning agent and a preparation method thereof. The cleaning agent comprises the following raw materials in parts by weight: 2-4 parts of oyster shells, 3-5 parts of short necked clam shells and 2-4 parts of scallop shells as well as activated carbon accounting for 7%-9% of the total material weight and chitin accounting for 4%-6% of the total material weight. The oyster shells, the short necked clam shells and the scallop shells from the sea are selected as the raw materials, so that the social environmental protection is realized by virtue of waste utilization through physical treatment. The antibacterial and fresh-keeping cleaning agent does not cause environment pollution, can clean mold, escherichia coli and residues which are left on tableware surfaces, can clean and remove pesticide residues on the melon, fruit and vegetables within a short period, realizes effects of fresh keeping and corrosion resistance, and solves the problems that a cleaning agent in the prior art can only remove oil stains and spots, but does not have sterilization and disinfection functions and causes environment pollution.

The invention discloses a soil conditioner and a preparation method of the soil conditioner, and belongs to the soil field. The soil conditioner is obtained by roasting at least one type of marine organism shells used as raw materials at 800-1200 DEG C. The marine organism shells are optimally oyster shells. The soil conditioner prepared through the preparation method has super strong adsorption and regulation capabilities, improves the physical and chemical properties of soil, and enables the soil to form a good granular structure; the effectiveness of macroelements and microelements is improved, therefore, the fertilizer rate is reduced, and crop output can be increased remarkably; the activity of toxic substance in the soil can be passivated remarkably, so that the phenomenon that aluminum ions cause a crop root system to be poisoned, rotted and dead is greatly reduced, and the capability of crops for stress resistance and resistance to diseases and pests is enhanced; physiological diseases of various crops can be effectively prevented and treated, beneficial cenobium in the soil can multiply at a high speed, and therefore the ecological restoration function of the soil is achieved.

The invention provides a pig manure and medicine slag fermentation organic fertilizer as well as a preparation method and application thereof, and belongs to the technical field of organic fertilizerpreparation. The organic fertilizer is prepared from the following raw materials in parts by weight through fermentation: 50 to 70 parts of pig manure, 25 to 40 parts of thoroughly decomposed anemarrhena pill medicine slag, 10 to 30 parts of corn stalk subjected to blasting pretreatment, 10 to 20 parts of oyster shell powder, 5 to 8 parts of potassium fulvic acid, 3 to 5 parts of molasses, 1.5 to3.5 parts of EM germ compost fermenting agents and 0.02 to 0.07 part of cellulase. The enzyme activity of the cellulase is one hundred thousand to two hundred thousand U / g, wherein the thoroughly decomposed anemarrhena pill medicine slag is obtained by fermenting and thoroughly decomposing medicine slag through trichoderma virens F7 strains; the preservation code of the trichoderma virens F7 strains is CGMCC 3.17613. The organic fertilizer is prepared from the raw materials through twice fermentation. The organic fertilizer has rich nutrition; the nutrition proportioning is reasonable; the organic fertilizer can be applied to crop planting.

The invention provides a method for curing sandy soil by using renewable calcium resource through MICP(microbially induced calcite precipitation). The method comprises the following steps: S1, preparation of a nutrient solution; S2, preparation of a bacteria solution; S3, preparation of a renewable calcium resource nutrient solution; and S4, preparation of biological sand pulp, wherein fresh oyster shells, scallop shells and egg shell from kitchen residuals are used as a renewable calcium resource, according to the method provided by the invention, the renewable calcium resource is subject toacid pickling so as to obtain calcium ions which are applied to the sandy soil application technology, kitchen wastes are used, solidifying and curing to the sandy soil are further performed, and materials obtained are excellent in intensity and appearance. Compared with the prior art that calcium is adopted for chemical analysis, the method provided by the invention has the advantages that the cost is greatly reduced, and the economical efficiency and the environmental protection effect are relatively good.

The invention belongs to the technical field of wastewater environmental-protection treatment, and particularly relates to a microorganism water treatment agent for heavy metal organic wastewater. The microorganism water treatment agent is prepared from the following raw materials: oyster shells, potassium feldspar, olivine, talc, serpentine, chlorite, attapulgite, ammonium molybdate modified bentonite, diatomaceous earth, aluminium polychlorid, magnesium hydrate, gram-negative bacteria, Bacillus mojavensis, polyacrylamide, tartaric acid, malic acid, citric acid, chitosan, ethylene glycol diglycidyl ether, epoxy chloropropane, thiosemicarbazide cellulose, corn starch, calcium alginate, hansenula polymorpha, candida, trailing plant, fagus longipetiolata sawdust, pinus sylvestris sawdust, walnut shell, lupulus, dehalogenase, horseradish peroxidase, urease and propionibacterium pentosaceum. A precipitate (alum floc) produced after treatment with the microorganism water treatment agent has good strippability, no solid particle is released into water basically, and the microorganism water treatment agent has rapid action speed and stable treatment effect, so that the adsorption time is usually not required to be prolonged during use.

The invention relates to a preparation method of calcium sulfate whiskers. The method is characterized by using oyster shells, industrial waste hydrochloric acid and sodium sulfate as raw materials, firstly grinding the oyster shells and then reacting the ground oyster shells with the industrial waste hydrochloric acid to prepare a calcium chloride solution, then adding sodium sulfate to obtain calcium sulfate slurry, and preparing the calcium sulfate whiskers after hydrothermal reaction. The method can achieve the effects of preparing the calcium sulfate whiskers with high added values and high yields, expanding the application range of the oyster shells and also improving the production capacity of the calcium sulfate whiskers.

The invention provides a raw material formula and a preparation method of using oyster shells to prepare recyclable waste water phosphorus removal materials. The method makes full use of the rich calcium resources contained in oyster shells, mixes calcined oyster shells and clay uniformly in an appropriate proportion, and forms them. It is sintered into a tubular or granular wastewater phosphorus removal material with a fixed shape. The product formula and process of the invention are simple, low in cost, strong in phosphorus removal capacity, high in product strength, recyclable, solve technical problems restricting the recycling and regeneration of phosphorus removal materials, and have strong market competitiveness and popularization and application value.

The invention provides a recyclable waste water dephosphorization material of oyster shells prepared by a fire-free method and a preparation method thereof, belonging to a recyclable waste water dephosphorization ecological environment material, and solving the technical problems of unreasonable utilization of the oyster shells, incomplete dephosphorization in the waste water, high cost, complex process and the like in the prior art. In the invention, calcium resources in the oyster shells are fully utilized, pre-processed oyster shells and concrete are uniformly mixed according to a proper proportion, molding is carried out, and then the waste water dephosphorization material is prepared through the fire-free method. The invention has simple formulation and process, low cost, strong dephosphorization ability and high intensity, can be recycled, and then solves the difficult technical problem restricting the recycle and regeneration of the dephosphorization material and has very strong market competition and promotion application value.

The invention relates to the aquaculture field of stichopus japonicus, in particular to a stichopus japonicus aquaculture sea reef produced by using oyster shells as material and an aquaculture method thereof. A sea reef monomer produced by using the oyster shell as material comprises an oyster shell, net clothing wrapping the oyster shell, a rope banding the sea reef monomer and the like; the sea reef monomer is formed by putting the oyster shell into the net clothing wrapping the oyster shell and banding by the rope; the sea reef is formed by a plurality of sea reef monomers, and sea reef crowd is formed by putting multi-group of the sea reefs into the sea region of aquaculture according to a certain arrangement. Stichopus japonicus offspring seeds and natural collection seedling are put in manually to realize stichopus japonicus aquaculture for one year to one year and a half, the stichopus japonicus can reach the specification of goods, and can be recovered by artificial collection and capturing. The invention has low manufacturing cost, obvious poly participation effect, high stichopus japonicus recaptured rate and easy operation and harvest; besides, the stichopus japonicus aquaculture sea reef has the obvious effect of carbon fixation.

The invention relates to a preparation method for a laying chicken feed. The method comprises the following steps: carrying out ultra-fine crushing on medicated leaven, dried orange peel, cordate houttuynia, radix puerariae, hawthorn and medical stone powder, adding water for soaking, decocting, and filtering so as to obtain a filtrate, and carrying out 5 to 7 times of concentration on the filtrate to obtain a concentrated solution; uniformly mixing corn, bean pulp, lemon acid residues, rice bran, shell powder and fish powder, and carrying out ultra-fine crushing to obtain a mixture A; adding the concentrated solution into the mixture A to be uniformly mixed, insulating heat for 10 minutes at the temperature of 80 to 85 DEG C, adding alum powder, insulating heat for 1 to 2 hours at the temperature of 50 to 60 DEG C, and cooling to room temperature after the insulating heat is finished to obtain a mixture B; adding calcined oyster shell powder into the mixture B, insulating heat, and adding composite vitamins and composite minerals into the mixture B to prepare a particular feed, namely the laying chicken feed. The prepared feed has the advantages that the laying chicken can obtain the sufficient nutrition, and the growth performance, laying amount and immunity of the laying chicken can be improved.

The invention discloses an aquaculture nutrition sustained release agent and a preparation method thereof. The problems of decrease of existing seawater pH values and culture environment deterioration are mainly to be solved. The preparation method includes subjecting oyster shells or / and scallop shells to cleaning pretreatment, crushing, calcinating, cooling, grinding to obtain activated shell powder, selecting the shell powder, adding magnesium oxide, trace elements, sodium alginate, chitosan, adhesives and an appropriate quantity of water into the shell powder, mixing evenly, forming, drying and sorting to obtain different grades of aquaculture nutrition sustained release agents. The aquaculture nutrition sustained release agent is capable of increasing seawater carbonate saturability effectively, increasing the shell calcification rate remarkably, improving fatness of the shells and culture water quality, promoting shell growth and increasing a water body pH value and the culture organism survival rate. The preparation method is reasonable in preparation technology, feasible to operate and easy to achieve large-scale production.

The invention discloses an alkaline agricultural compound microbial improver. The alkaline agricultural compound microbial improver comprises 70-95 parts of oyster shell powder, 3-15 parts of biochemical fulvic acid, 0.1-1 part of water-retention soil-loosening agents and 1-5 parts of compound microbial agent, wherein the oyster shell powder is obtained through roasting oyster shells at the temperature of 850 DEG C to 1,000 DEG C, carrying out activating, and then, carrying out crushing. According to the alkaline agricultural compound microbial improver disclosed by the invention, the oyster shells serve as a main carrier, adsorb the microbial agent and are matched with micromolecular organic carbon nutrients such as biochemical potassium fulvate, and thus, the problem in survival of microbes is effectively solved; by adding the water-retention soil-loosening agents, soil aggregates can be increased, and soil can preserve moisture and fertility and is resistant to drought and waterlogging; meanwhile, the alkaline agricultural compound microbial improver has the effects of conditioning soil acidification, improving soil hardening, increasing the soil aggregates and increasing utilization rate of fertilizer; and a rooting zone environment of crops can be improved, the content of beneficial bacteria is increased, roots can be robust, the absorption of nutrients is promoted, the quality of fruits is improved, and the yield is increased.

The invention discloses a method for preparing a composite shellfish toxin adsorbent by coating porous shell particles with chitosan. The method comprises the steps of conducting diluted acid washing and water washing on shells (fan shells, oyster shells, clam shell and the like) with shellfish meat removed to remove dirt on the surfaces of the shells, conducting stoving, electric furnace firing, high-temperature calcination, smashing and screening to obtain shell particles, soaking the shell particles in chitosan / acetic acid solution with certain concentration, and conducting draining and vacuum drying to obtain the composite adsorbent with chitosan coatings formed on the inner bore walls of the shell particles and on the surfaces of the particles. The invention further discloses a method for adsorbing shellfish toxins in aquatic products by means of the composite adsorbent and a method for regeneration of the composite adsorbent. By the adoption of the method for adsorbing shellfish toxins in aquatic products by means of the composite adsorbent, shellfish toxins can be removed efficiently, so that polluted aquatic products can be utilized and environment pollution can be reduced.