48 results about "Mactra veneriformis" patented technology

The invention relates to a mactra veneriformis extract which is prepared by the following method of taking the soft body part of the mactra veneriformis as a material, washing and grinding the material, adding water for decoction, filtering, then obtaining water decoction extracting solution, centrifuging the water decoction extracting solution,collecting supernatant fluid, concentrating, cooling, then adding ethanol for precipitating, filtering, obtaining an ethanol precipitate, drying and then obtaining the mactra veneriformis extract; and deproteinizing the mactra veneriformis extract to obtain purified mactra veneriformis extract which has glycemia-reducing, immune adjusting and liver-protecting functions. The invention also discloses the applications of the mactra veneriformis extract on preparation of medicaments or health care products simultaneously.

The invention relates to the field of marine product processing, and aims to provide a composite seafood soup blend which is convenient for eating and absorption and used for nutrition, health care and seasoning, and a preparation method thereof. The composite seafood soup blend is prepared by proportionally blending mactra veneriformis extract, scallop extract, shrimp meal, modified starch, table salt, disodium succinate, monosodium glutamate, disodium 5'-ribonucleotide, dehydrated diced carrot, dehydrated shallot powder, white pepper powder, citric acid and the like. The mactra veneriformis or scallop extract is prepared by carrying out enzymolysis on cooking liquor and mactra veneriformis flesh or scallop flesh and spray drying, so that the problem of pollution caused by the mactra veneriformis juice and scallop juice waste is avoided, and the flavor of the composite seafood soup blend is more plump. The composite seafood soup blend contains rich active peptides, amino acids, nucleotides and minor elements, and has the health-care function.

The invention discloses a method for separating and purifying a nucleoside chemical ingredient from ocean low-value shellfish (such as mactra veneriformis, ruditapes philippinarum, meretrix lusoria, anadara subcrenata, cyclina sinensis, solen and surf clam shell). The method comprises the first step of preparation of shellfish water extract and alcohol precipitate supernate, the second step of macroreticular resin column rough separation and the third step of separation and purification of cation exchange resin. The method for separating and purifying the nucleoside chemical ingredient from the ocean low-value shellfish is reasonable in technological design, strong in operability, short in production period, low in cost and high in environmental protection; the prepared nucleoside chemical ingredient is high in purity and has the good effect of protecting liver; mactra veneriformis, ruditapes philippinarum, meretrix lusoria and other low-value shellfish resources can be sufficiently utilized, and the important economic value is obtained.

The invention relates to a method for preparing canned mactra veneriformis with primary taste, which comprises the steps of material selection, acceptance, selection, sand spitting, grading and selection, detection of mud clams, adding of concentrated clam soup and fine rice wine, vacuum sealing, sterilization and cooling, inspection under a constant temperature, boxing up and the like, specifically, selecting the mactra veneriformis of which heavy metal content, microbial indicators, saxitoxin and the like meeting relevant standards to carry out sand spitting and purification: wherein the water temperature is 20 DEG C to 30 DEG C, the salinity is 1.5% to 3.5%, and the time for spitting sand is 24 hours; then added 30g according to the proportion of 2:1 of the concentrated clam soup to the fine rice wine; packaging and sealing at a 700mm Hg vacuum level, wherein the sterilization formula is 5-5-5min / 125 DEG C; cooling down to a water temperature of 10 DEG C; and storing in a refrigerated warehouse after reaching commercial sterility through inspection. According to the method provided by the invention, the mactra veneriformis meat, not subjected to strong flavor conditioning but added with the special fine rice wine mixed with the primary taste soup, is processed into the special canned food with primary taste and has the advantages of simpleness in processing, convenience for eating and delicious taste, which provide a reference for promoting the utility value of mactra veneriformis and other low-value conches.

The invention provides a Mactra veneriformis glycosaminoglycan extraction method, which is characterized by comprising the following steps of: weighing the soft part of Mactra veneriformis, adding water to prepare into a homogenate with the ratio of water to material being 3:1, adding neutral subtilisin and trypsin into the homogenate for enzymatic hydrolysis while the ratio of bacillus subtilis neutral proteinase to trypsin is 4:3, the addition of compound enzyme is 1% and the hydrolysis time is 3-5h, boiling and centrifuging the enzymolysis liquid to obtain a clear liquid, adding active carbon for decolouring, followed by vacuum filtration, filtering with the assistance of diatomite, carrying out alcohol precipitation to obtain crude glycosaminoglycan with the yield rate being more than 1.3%, preparing 3% of a sugar solution, centrifuging to remove acidic and neutral proteins, followed by dialysis of a supernatant and alcohol precipitation, preparing 1% of a sugar solution, adding 5% of CTAB, centrifuging, dissolving the precipitate into a KCI solution to obtain a dissociation liquid, carrying out alcohol precipitation, followed by dialysis and alcohol precipitation to obtain high-purity glycosaminoglycan. The method provided by the invention has advantages of mild reaction condition and high yield rate and purity. Lots of proteins can be recovered while extracting glycosaminoglycan. The extracted substance has important effects of removing free radial, resisting oxidation and resisting coagulation. The yield rate of crude glycosaminoglycan reaches over 1.3% and the purity of glycosaminoglycan reaches more than 95%.

The invention discloses a preparation method of an organic fertilizer for planting high quality tea. The organic fertilizer comprises the following substances by weight: 15-20 parts of broad bean straw powder, 5-10 parts of conch shell powder, 5-9 parts of Mactra veneriformis shell powder, 9-14 parts of calcium hydrogen phosphate, 3-6 parts of calcium phosphate, 3-5 parts of potassium nitrate, 2-6 parts of ammonium nitrate, 1-2 parts of calcium nitrate, 10-15 parts of rapeseed meal, 15-20 parts of soybean meal, 68 parts of peat, 25-35 parts of chicken manure, 15-30 parts of soybean meal, 1-2 parts of Bacillus subtilis, and 3-6 parts of ground phosphate rock. The fertilizer provided by the invention is rich in organic fertilizer, inorganic fertilizer and other nutrients, has the characteristics of no toxicity, no side effect, no residue, no drug resistance and no pollution to the environment, is conducive to tea growth, can obviously supplement the nutritional ingredient needed by tea, improves the quality of tea, increases the content of substances beneficial to human body in tea, and can improve soil.

The invention discloses a compound mactra veneriformis organic calcium preparation and a preparation method thereof. The organic calcium preparation consists of 90 to 95 parts of mactra veneriformis organic acid calcium, 0.1 to 0.5 part of vitamin B2, 0.5 to 1 part of vitamin D3 and 1 to 5 parts of casein phosphate peptide. The organic acid calcium is prepared from mactra veneriformis shells by the steps of calcining at a high temperature, crushing, dissolving in hydrochloric acid, removing acid insoluble matters, precipitating by adding sodium carbonate, performing suction-filtration, drying, performing secondary calcining, reacting with organic acid in water, standing, suction-filtering, drying and crushing. By a great number of experimental researches, after being scientifically combined with the vitamin B2, the vitamin D3 and the casein phosphate peptide, mactra veneriformis organic calcium has full nutrients and higher calcium absorptivity; the preparation method of the mactra veneriformis organic calcium is stable in process and high in operability; particularly, the purity of the prepared organic acid calcium can be over 99 percent; and the organic acid calcium contains trace elements required by human bodies such as Fe, Cu, Zn and the like, has low content of heavy metal, and meets the national food standards.

The invention discloses a mactra veneriformis conditioning accelerator and belongs to the field of aquatic product processing. The accelerator comprises a cuboid container, a water storage box, a water injection electromagnetic valve, a water injection pipe, a water draining electromagnetic valve, a water drainage pipe, an optoelectronic switch and a float switch, wherein a separating net is horizontally arranged in the cuboid container; a slope is arranged at the bottom of the interior of the cuboid container; the optoelectronic switch is arranged at the lower part of the slope; the float switch is arranged at the upper end of the interior of the cuboid container; one end of the water injection pipe is communicated with the water storage box; the other end of the water injection pipe is connected with the upper end of the cuboid container through the water injection electromagnetic valve; the water drainage pipe is connected with the lower end of the cuboid container through the water draining electromagnetic valve; the water injection electromagnetic valve is connected into a power supply through the float switch; the water draining electromagnetic valve is connected with the power supply through the optoelectronic switch. According to the invention, with adoption of the method that water in the container is separated from the external air, mactra veneriformis conditioning is accelerated, automatic water changing and desilting are carried out when a certain amount of silt is gathered, manual intervention is not needed during the whole process, the labor intensity of workers is reduced, and the mactra veneriformis conditioning efficiency is improved.

The invention discloses bio-fertilizer for planting high-quality tea. The bio-fertilizer is characterized by comprising substances in parts by weight as follows: 15-20 parts of broad bean straw powder, 5-10 parts of trumpet shell powder, 5-9 parts of mactra veneriformis shell powder, 9-14 parts of calcium hydrophosphate, 3-6 parts of calcium phosphate, 3-5 parts of potassium nitrate, 2-6 parts of ammonium nitrate, 1-2 parts of calcium nitrate, 10-15 parts of rape meal, 15-20 parts of soybean meal, 68 parts of turf, 25-35 parts of chicken manure, 15-30 parts of soybean meal and 1-2 parts of bacillus subtilis. The fertilizer is rich in nutrition such as organic fertilizer, inorganic fertilizer and the like, non-toxic, free from side effects, residuals, drug resistance and environmental pollution, beneficial to tea growth and capable of obviously replenishing nutritional ingredients required by the tea, improving the tea quality, increasing the content of substances beneficial to human bodies in the tea and improving the soil.

The invention discloses an environment-friendly stone imitating house biological decoration material, which is characterized by including the following substances by weight: 29-36 parts of a water-based elastic acrylic emulsion, 12-19 parts of carbamate, 3-6 parts of oak sawdust, 2-6 parts of Ailanthus altissima sawdust, 1-6 parts of Schima superba sawdust, 1-3 parts of stannous decanoate, 9 parts of polybutylene glycol, 11-13 parts of clam shell powder, 13-15 parts of Scapharca subcrenata shell powder, 14-16 parts of Mactra veneriformis shell powder, 4-8 parts of calcium stearate, 9-16 parts of lignocellulose, 6-7 parts of methyl benzoate, 9-14 parts of polyvinyl alcohol, 3-6 parts of chlorobenzene, and 6-13 parts of a dispersant. With excellent environmental protection performance, the decoration material provided by the invention has a stone imitating effect, and can meet the needs of market diversification, humanization, creativation and individuation.

A processing method for rolled Mactra veneriformis meat comprises the following steps: crushing fresh Mactra veneriformis meat, cleaning out sand with water and then dehydrating; cutting and mixing the clam meat and animal meat into meat mash, then adding auxiliary materials, seasoning matters and additives, blending the mixing materials evenly to prepare the stuffing of the rolled meat; and making the rolled meat seasoned and tasty through curing, and finally obtaining the rolled meat and obtaining a finished product after processing and packaging according to different demands. The method solves the technical difficult problem that the Mactra veneriformis meat is inconveniently processed, utilized and edible because of great sand content. With the unique seasoning and processing technology, the product which is tasty and nutritive can better meet the catering demand of a plurality of consumers.

The invention relates to a method for preparing canned mactra veneriformis with primary taste, which comprises the steps of material selection, acceptance, selection, sand spitting, grading and selection, detection of mud clams, adding of concentrated clam soup and fine rice wine, vacuum sealing, sterilization and cooling, inspection under a constant temperature, boxing up and the like, specifically, selecting the mactra veneriformis of which heavy metal content, microbial indicators, saxitoxin and the like meeting relevant standards to carry out sand spitting and purification: wherein the water temperature is 20 DEG C to 30 DEG C, the salinity is 1.5% to 3.5%, and the time for spitting sand is 24 hours; then added 30g according to the proportion of 2:1 of the concentrated clam soup to the fine rice wine; packaging and sealing at a 700mm Hg vacuum level, wherein the sterilization formula is 5-5-5min / 125 DEG C; cooling down to a water temperature of 10 DEG C; and storing in a refrigerated warehouse after reaching commercial sterility through inspection. According to the method provided by the invention, the mactra veneriformis meat, not subjected to strong flavor conditioning but added with the special fine rice wine mixed with the primary taste soup, is processed into the special canned food with primary taste and has the advantages of simpleness in processing, convenience for eating and delicious taste, which provide a reference for promoting the utility value of mactra veneriformis and other low-value conches.

The invention discloses a synergistic medicine composition for treating diabetes. Rhizoma anemarrhenae total saponins and mactra veneriformis polysaccharide serve as main effective ingredients of the composition. It is found for the first time that compared with rhizoma anemarrhenae total saponins and mactra veneriformis polysaccharide, the rhizoma anemarrhenae total saponins and mactra veneriformis polysaccharide composition expresses good blood sugar reducing synergism in vitro and vivo.

The invention discloses a method for spat culture of Vietnam mactra veneriformis. The method comprises the following steps of (1) selecting parent shells of Vietnam mactra veneriformis with full gonads, drying in a shady area, stimulating, and inducing to lay spawns and sperms; (2) washing the spawns, and hatching; (3) culture of larva: after a zygote grows into a D type larva, setting the spat culture density to 5-8 spats per milliliter, and feeding isochrysis, wherein the feeding quantity is 30000 to 100000 isochrysis per milliliter, and 1 / 3 to 1.2 of water is replaced at morning and night each day; (4) after the D type larva enters the later larva phase, moving the D type larva into an outdoor water tank with bottom sand, wherein the water depth is 100cm, the water temperature is 25 to 32 DEG C, the salt content is 80 to 260%, and the sinking attaching density of larva is 10000 to 15000 larva per liter; (5) when the young shell density exceeds 120 young shells per square centimeter, loosening the spats. The method has the advantages that the spat culture density is increased, and the industrialized large-batch spat culture is realized; according to the mucus secretion habit of the Vietnam mactra veneriformis larva, the sand stone is fed into the culture tank to absorb the mucus, so as to avoid the death of Vietnam mactra veneriformis larva.

The invention discloses a friction-resistant thermal-insulation composite coating. The friction-resistant thermal-insulation composite coating comprises, by weight, 50-80 parts of cement, 11-16 parts of polyethylene methyl ether methacrylate, 9-14 parts of Meretrix meretrix Linnaeus shell powder, 3-9 parts of ham shell powder, 5-6 parts of Mactra veneriformis shell powder, 3-7 parts of a bactericide, 3-9 parts of an organosilicon-modified epoxy resin, 10-16 parts of carbamate, 3-5 parts of thermoplastic resin, 5-8 parts of polyisoprene rubber, 3-8 parts of an antimony-based composite eco-friendly fire retardant and 5-9 parts of triisocyanurate. The friction-resistant thermal-insulation composite coating utilizes composite cement and lime, can shorten slurry thickening time, can fully keep foam produced by a foaming agent and aluminum powder so that material thermal insulation properties are guaranteed, simultaneously uses physical and chemical foaming agents and is conducive to slurry heat insulation performance improvement.

The invention discloses a communication station high hardness coating material, which is characterized by including the following substances by weight: 35-52 parts of a plastic base material, 11-26 parts of glass fiber, 1-9 parts of a brominated flame retardant, 3-8 parts of clam shell powder, 2-6 parts of Mactra veneriformis shell powder, 1-3 parts of a water-based dispersing agent, 4-8 parts of Eucalyptus sawdust, 3-8 parts of cypress sawdust, 2-6 parts of oaklet sawdust, 1-6 parts of orange tree sawdust, 9-13 parts of stearic acid, 30-50 parts of cement, 12-16 parts of acrylic ester, 3-5 parts of isoprene rubber, 9-11 parts of alcohol soluble resin, and 10-18 parts of gypsum. The material provided by the invention is an excellent thermal insulation material, has the advantages of low thermal conductivity coefficient, stable physical and chemical properties, no aging, high temperature resistance and no cracking, can be used as a coating, and also can be placed into a mould to be strickled, heated and baked into a sheet material.

The invention aims to provide a clam-flavor rice mixing condiment and a preparation method thereof, mainly in order to improve nutritional ingredients and unique flavor of the condiment and make the condiment to be a nutrient source in food. In order to achieve the purpose, the method specifically includes: selecting one or several of fresh meretrix, venerupis philippinarum and mactra veneriformis, subjecting the fresh clams to pretreatment such as sand removal and cleaning, opening shells for scraping meat, cooking the meat, subjecting a little of the clam meat to freeze drying, and then beating the rest meat into clam pulp; freezing and drying a little of the pulp, subjecting the rest clam pulp to biological enzymolysis prior to standing, precipitation and solid-liquid separation, and subjecting enzymolysis supernatant to concentration and freeze drying; subjecting the precipitate to Maillard reaction, performing centrifugation to obtain supernatant, and subjecting the supernatant to concentration and freeze drying, wherein the two become main base materials for making the clam-flavor rice mixing condiment. Since the biological enzymolysis and Maillard combined method is adopted, nutritional components contained in the clams can be retained, and flavor of the clam-flavor rice mixing condiment can be improved. For preparing the clam-flavor rice mixing condiment, a certain amount of sodium glutamate, salt, disodium succinate, I+G and minced clam meat have to be added to be mixed into the clam-flavor rice mixing condiment.

The invention discloses a novel interior biological coating for buildings. The novel interior biological coating for buildings is characterized by comprising the following components in parts by weight: 15-20 parts of n-butyl acetate, 3-5 parts of formaldehyde solution, 1-5 parts of glacial acetic acid, 8-16 parts of soybean straw, 6-8 parts of clamshell powder, 3-6 parts of scapharca subcrenata shell powder, 2-6 parts of Mactra veneriformis shell powder, 1 part of pigment, 3-5 parts of thickener, 25-30 parts of alkyd resin, 10-16 parts of fluororesin, 10-16 parts of furfuryl alcohol resin, 8-16 parts of enhancer and 4-6 parts of plastification antifreeze agent. The environment-friendly dry powder interior wall coating provided by the invention has the advantages of excellent workability and use performance, as well as very high binding power and scrubbing resistance. The coating film hardly cracks.

The invention discloses a green coating for buildings. The green coating is characterized by comprising the following substances in parts by weight: 25-29 parts of furfuryl alcohol resin, 18-23 parts of isocyanate, 1-9 parts of fillers, 6-9 parts of clamshell powder, 3-5 parts of scapharca subcrenata shell powder, 2-6 parts of mactra veneriformis shell powder, 1-3 parts of perlite, 12-15 parts of cedrus saw dust, 13-16 parts of silver birch saw dust, 16-18 parts of oak saw dust, 3-4 parts of prunus padus saw dust, 9-14 parts of organosilicone modified epoxy resin, 10-15 parts of mixed solvent and 1-9 parts of toughening agent. The green coating has the characteristics of high wet-dry curing speed, high bonding strength, waterproof and moistureproof properties and the like. After the green coating is used, the phenomena such as dusting, cracking, hollowing, shedding, frosting and the like can not appear on walls.

The invention provides a Mactra veneriformis glycosaminoglycan extraction method, which is characterized by comprising the following steps of: weighing the soft part of Mactra veneriformis, adding water to prepare into a homogenate with the ratio of water to material being 3:1, adding subtilisin and trypsin into the homogenate for enzymatic hydrolysis while the ratio of bacillus subtilis neutral proteinase to trypsin is 4:3, the addition of compound enzyme is 1% and the hydrolysis time is 3-5h, boiling and centrifuging the enzymolysis liquid to obtain a clear liquid, adding active carbon for decolouring, followed by vacuum filtration, filtering with the assistance of diatomite, carrying out alcohol precipitation to obtain crude glycosaminoglycan with the yield rate being more than 1.3%, preparing 3% of a sugar solution, centrifuging to remove acidic and neutral proteins, followed by dialysis of a supernatant and alcohol precipitation, preparing 1% of a sugar solution, adding 5% of CTAB, centrifuging, dissolving the precipitate into a KCI solution to obtain a dissociation liquid, carrying out alcohol precipitation, followed by dialysis and alcohol precipitation to obtain high-purity glycosaminoglycan. The method provided by the invention has advantages of mild reaction condition and high yield rate and purity. Lots of proteins can be recovered while extracting glycosaminoglycan. The extracted substance has important effects of removing free radial, resisting oxidation and resisting coagulation. The yield rate of crude glycosaminoglycan reaches over 1.3% and the purity of glycosaminoglycan reaches more than 95%.

The invention discloses a preparation and application method for an ocean shellfish extractive with a food calling effect on loaches. The preparation and application method comprises the following steps: carrying out freezing treatment on mactra veneriformis; taking out shellfish meat and crushing the shellfish meat by using a beating machine; cooking clam nectar in three time periods, continually cooking for 10 minutes after the clam nectar is boiled, continually cooking for 30 minutes after the clam nectar is boiled and continually cooking for 50 minutes after the clam nectar is boiled; preparing the clam nectar to be in three concentrations of 0.025g / ml, 0.1g / ml and 0.4g / ml; filtering the obtained clam nectar by a screen and a filtering machine; mixing the filtered clam nectar with a feed according to a certain ratio respectively; putting raw materials obtained by mixing the clam nectar and the feed into a drying oven to be dried, wherein the drying temperature is 60 DEG C and the drying time is 3 hours; dividing the loaches into 12 groups, wherein each group contains 10 loaches; taking two groups as blank control groups and cultivating; and feeding the loaches by food calling agents with different concentrations, different screen meshes, different proportions of the clam nectar to the feed and different cooking time, and observing and comparing. According to the preparation and application method for the ocean shellfish extractive with the food calling effect on the loaches, the feeding rate of the loaches is increased, the method is simple and the operation is convenient.

The invention discloses a green latex paint for building interior walls. The green latex paint is characterized by comprising the following components in parts by weight: 2-8 parts of filling masterbatch, 1-8 parts of TPE (thermoplastic elastomer), 1-3 parts of Japan euonymus sawdust, 3-8 parts of larch sawdust, 3-5 parts of acacia mearnsii sawdust, 1-2 parts of rutile titanium dioxide, 14-16 parts of scapharca subcrenata shell powder, 13-16 parts of mactra veneriformis shell powder, 2-9 parts of oyster shell powder, 21-26 parts of urea formaldehyde resin and 12-18 parts of polytetrafluoroethylene gum. The green latex paint has the beneficial effects that the green latex paint has low VOC (volatile organic compound) content, simultaneously has mould-proof, anticorrosion and antibacterial functions, is simple to prepare, does not contain components containing silver ions, and is low in cost.

The invention discloses a green self-regulation energy-conservation paint, which is characterized by comprising the following components by weight: 3-5 parts of redispersible latex powder, 14-19 parts of mactra veneriformis shell powder, 6-11 parts of oyster shell powder, 9-11 parts of venerupis philippinarum shell powder, 1-6 parts of mineral insulation material, 5-9 parts of film forming auxiliary agent, 1-2 parts of cosolvent, 3-6 parts of camellia wood chip, 2-5 parts of fringed hibiscus wood chip, 3-6 parts of Chinese rose wood chip, 3-5 parts of perlite, 11-16 parts of polyisoprene rubber, 14-16 parts of alcohol-soluble resin, 9-13 parts of resorcinol, 3-6 parts of paraformaldehyde and 9-13 parts of acid anhydrides. The green self-regulation energy-conservation paint has the beneficial effects of heat insulation, fire resistance, high temperature resistance, aging resistance, less water absorption; simple and fast construction method with manual plasterer, and good heat insulation effect; can be widely used as a thermal insulation layer for any building such as metope and roof.

An anticorrosive marking coating is prepared from, by weight, 6-11 parts of a polytetrafluoroethylene emulsion, 5-7 parts of N-ethylcarbazole, 1-4 parts of magnesium hydroxide, 6-8 parts of montmorillonite powder, 2-5 parts of zirconia, 8-12 parts of tripalmitin, 1-5 parts of barium carbonate, 2-6 parts of chlorinated resin, 3-8 parts of nanometer talcum powder, 7-9 parts of rosin water, 3-5 parts of Chinese hibiscus wood chip, 1-3 parts of a network interpenetrating emulsion, 1-4 parts of Mactra veneriformis shell powder, 2-5 parts of an anti-settling agent and 5-9 parts of hydroxyapatite. The marking coating has the advantages of very good acid and alkali resistance, water corrosion resistance and good wear resistance.

The invention discloses a method for artificial spat culture of Vietnam mactra veneriformis capable of effectively increasing yield. The method comprises the following steps of (1) selecting three-year and above Vietnam mactra veneriformis as parent shells; drying the parent shells in a shady area, stimulating by flowing water, putting the parent shells into ammonia seawater, soaking, enabling the male parent shells to lay sperms, enabling the female parent shells to lay spawns, enabling the sperms and spawns to naturally fertilize in water, forming a larva, using chaetoceros mulleri as feed, and feeding the larva. Compared with the prior art, the method has the advantages that the culture steps are scientific and reasonable; the survival rate of the Vietnam mactra veneriformis larva is effectively improved; the death rate of the Vietnam mactra veneriformis larva is decreased by 11%, and the yield is increased by 18%.

The invention discloses a biofilm carrier and a domestication method thereof, and belongs to the field of environmental science. According to the method, mactra veneriformis is cultured in the inoculated water body until microbiological populations stably grow at the edge of the mactra veneriformis, the mactra veneriformis of which microbiological communities can stably grow on the edge is taken as a biofilm carrier, and by means of a symbiotic relationship formed by the microbiological populations and the mactra veneriformis, eutrophication in the aquaculture wastewater is effectively treated, the seawater is purified, and the survival rate of the mactra veneriformis during high-density application is increased.

The invention discloses a multipurpose biological energy-saving coating, which is characterized by including the following substances by weight: 30-50 parts of sepiolite, 9-15 parts of Davidia involucrata sawdust, 3-5 parts of kapok sawdust, 2-6 parts of Ceiba pentandra sawdust, 15-21 parts of high density polyethylene, 1-9 parts of talcum powder, 2-10 parts of liquid paraffin, 2-6 parts of conch shell powder, 1-3 parts of Mactra veneriformis shell powder, 1-3 parts of Venerupis philippinarum shell powder, 4-9 parts of perlite, 2-7 parts of thermoplastic resin, 11-16 parts of polyisoprene rubber, 3-9 parts of polyvinyl butyral, 3-9 parts of fiber, and 3-9 parts of a foaming agent. The multipurpose biological energy-saving coating provided by the invention has the advantages of good thermal insulation performance, long service life, no aging, anti-corrosion function, good non- combustion performance, and high social and economic benefits.