105results about How to "Reduce nutrients" patented technology

The present invention is drawn to a unique apparatus and method for treating and reusing the wastewater discharged from agricultural animal farms. The apparatus and method of the present invention may be readily-sized and configured depending upon the amount and constituent(s) of the wastewater to be treated. In a first embodiment, the apparatus and method of the present invention is designed to be a zero discharge system in which no wastewater will be discharged or land applied. In use, the apparatus and method of the first embodiment may actually require addition of make-up water during periods of low rainfall to make up water losses due to evaporation and drift. It is contemplated that the only byproduct of the apparatus and method of the first embodiment may be a beneficial sludge if a sufficient number of installations are operated. In a second embodiment, the apparatus and method of the present invention provides a treatment system capable of reducing the nutrient loading in a step-wise fashion so that the wastewater can be used from different steps of treatment in order to apply the varying nutrient loads required by crops on a seasonal basis.

An ecological absorptive landscape float bed for treating landscape water body achieves low cost and short treating period. Multiple holes are arranged on the float supporting basilar plate of float consists of light float materials, an ecological absorptive layer is arranged on the holes bottom by coated netting bag, the ecological absorptive layer contacts with landscape surface directly, high-efficient phosphorus absorptive material, ammonia nitrogen absorptive material and biological ceramic particles are filled, water-planting flowers, aquatic ornamental plants and commercial crops are planted on the ecological absorptive layer. It can improve nitrogen and phosphorus removing speed and capacity.

The invention relates to a greening matrix containing quarry mucks, animal manures, straws and charcoal powder and a preparation method of the greening matrix. The greening matrix comprises the following components including quarry mucks, animal manures, straws and charcoal powder. By using the greening matrix provided by the invention, vegetation is greened again, so that soil erosion resistibility and water and soil loss interception ability are increased, land and water resources can be protected, environment can be beautified, water and soil loss caused by stacking waste slag is reduced, biological environment of mines is improved, and cyclic utilization of land sources is realized.

The invention discloses a flame-retardant anti-corrosive fiber bamboo base material and a preparation technology thereof. The method comprises the following steps of: 1) cutting raw bamboo into bamboo filament; 2) flame-retardant treatment: soaking the bamboo filament prepared in the step 1) in a flame retardant aqueous solution; 3) drying: after the flame-retardant treatment, drying the bamboo filament at 55-65 DEG C until the absolute water content does not exceed 12%; 4) carbonization pyrolysis: feeding the dried bamboo filament into a carbonization pyrolysis kiln, and performing high-temperature treatment according to the pyrolysis gradient; and 5) sequentially performing gumming, post-gumming drying, pressing, curing, maintaining and splitting to obtain the bamboo base material. The bamboo base material has strong stability, the product surface does not crack, the corrosion resistance is enhanced, good flame retardance is realized, and the bamboo base material can be used in various weathers and environments.

An apparatus, system and method of providing non-chemical cooling water treatment and management is disclosed. The invention combats the problems of scaling, microbiological growth, corrosion and fouling. The overall system is regulated by a monitoring and control system that allows for full management of cooling water treatment. Without the use of chemicals, the system and method of the present invention is an effective, safe and environmentally sound approach to the treatment of cooling water.

The invention discloses a method for manufacturing engineered geothermic floors. The invention comprises the following procedures that: a cotton wood veneer or an imported miscellaneous tree veneer undergoes the process of deep steaming charring treatment under the pressure of 0.3 to 0.5MPa within 3 hours to obtain floor base materials; a hardwood plate with a thickness of 2 to 4mm is used as a surface course and the hardwood plate also undergoes the process of deep steaming charring treatment; the hardwood plate and the floor base material are made into a blank; after being glued, the obtained blank is made into the engineered floor suitable for geothermy after being notched and lacquered. The engineered floor suitable for geothermy has good corrosion resistance, weather resistance, stability and wearing resistance. In addition, the engineered geothermic floor accords with the modern idea of environmental protection and is easy to be maintained.

A floating wetland raft comprising a floating raft body onto which is attached a biodegradable mat. The floating raft body is preferably made of closed cell polyethylene foam, and the mat may be woven of coir fiber. The mat covers the raft body and nests into an open area therein. The mat serves as a surface on which aquatic plants are grown for consuming nutrients from the water beneath. The biodegradable mat and associated plant biomass can be removed and subsequently replanted elsewhere or composted. The nutrients contained in the removed biomass represent a permanent reduction of nutrients in the water from whence they came. The floating raft body is durable and can be used repeatedly by attaching a freshly planted mat and repeating the nutrient removal process, which helps alleviate the problem of nutrient overloading in bodies of water.

The method of planting submerged plant in semi-floating carrier to treat water pollution includes the following steps: connecting seedling raising trays to the floated body in certain distance with rope, adding soil to seedling raising trays and transplanting submerged plant, and fixing the seedling raising trays under water. One relevant apparatus is also provided, which can restore submerged plant in eutrophic water, lower nutritive salt content in water and inhibit water bloom, so as to restore water quality. The method is simple and low in cost.

The invention relates to a storing and fresh preserving method spinach, pertaining to the technical field of vegetable storage and fresh preservation. The method comprises the steps of: (1) harvesting the spinach that accords with the harvesting standard in time; (2) rapidly pre-cooling the spinach at the temperature of 4 to 7 DEG C; (3) dividing and packing the spinach into special freshness preservation packages and then tying package mouths tightly and putting into a refrigeratory at the temperature of minus 1 to 2 DEG C and with the humidity of 90 to 98 percent for 2 to 3 hours, then untying the package mouths; inserting empty tubes with the inside diameter of 30mm into the packages; tying the package mouths again for maintaining ventilation degree of the package mouths and automatically regulating the gas environment in the packages with 5 to 8 percent of CO2 and 8 to 12 percent of O2; (4) taking 5 to 7 days as a circle to proceed with the management of opening the package mouths for ventilation for 2 to 3 hours and inserting the empty tubes and tying the package mouths again until the storing is finished. The method of the invention has low cost, good storing effect and is simple and convenient for operation, and the spinach can still maintain good marketability after 25 days. The method can be widely introduced to vegetable growers, dealers or processing enterprises.

The invention belongs to the technical field of ecological restoration and particularly relates to a water body ecological restoration method. The water body ecological restoration method comprises the steps that the water surface is cleaned, then submerged plants, emergent aquatic plants and floating-leaved plants are planted, and aquatic animals are put in. According to the water body ecological restoration method, sludge at the water bottom is treated with a plant blanket in-situ coverage method, root systems of the emergent aquatic plants are fixed with pollution-free clay, and a putting-in type planting method is adopted for the floating-leaved plants and the emergent aquatic plants. The aqueous plants can provide an adhesion symbiotic space for microorganisms, and provide a food source for aqueous animals, fish and shellfish are put in when the aquatic plants grow stably, and a rapid and simple water body forest system is formed. By means of the water body ecological restoration method, the effects of fixing sludge at the water bottom, restoring the natural ecological environment and maintaining the water to be clear permanently can be achieved; meanwhile, a dwelling site can be provided for fish and birds, and certain river landscape can be formed.

The invention discloses common perilla and brown sugar stuffing sweet dumplings and a production method thereof. The common perilla and brown sugar stuffing sweet dumplings consist of sweet dumpling stuffing and sweet dumpling wrappers, wherein the sweet dumpling stuffing comprises the components of white granulated sugar powder, plant oil, drinking water, wheat flour, brown sugar, common perilla powder, black sesame powder, peanut powder and soybean meal; and the sweet dumpling wrappers comprise the components of water-containing water-milled glutinous rice flour, cooked sticky rice roll, drinking water and konjaku flour. The production method of the common perilla and brown sugar stuffing sweet dumplings comprises the following steps: making the aqueous water-milled glutinous rice flour; preparing a sweet dumpling wrapper dough; preparing the stuffing; and making the sweet dumplings. If the prepared sweet dumplings are frozen quickly and preserved in a freezing manner, the preservation time of the sweet dumplings can be prolonged. Compared with the prior art, the common perilla and brown sugar stuffing sweet dumplings are rich and balanced in nutrition, have the effects of improving health, are good in color and mouthfeel, and are fine and smooth in taste. Moreover, the production method of the common perilla and brown sugar stuffing sweet dumplings is convenient and is easy in operation. The produced sweet dumplings are safer and more sanitary by means of inhibition of the breeding of microorganisms.

The invention discloses a high-density culture and pre-harvesting method of microalgae, belonging to the field of microalgae biotechnology. The high-density culture and pre-harvesting method of microalgae comprises the following steps: adding a microalgae medium into a photobioreactor; inoculating the photobioreactor with algae cells; in the microalgae culture process, intercepting the algae cells in the reactor through the filtration of a membrane component, and discharging the filtrate; concentrating the algae liquid to obtain an algae product, and harvesting the algae product; and meanwhile, circulating the filtrate into the photobioreactor for recycling. In the microalgae culture process, the method disclosed by the invention saves water resources and nutritive salt and reduces the microalgae culture cost.

The invention discloses a biological treatment process technology for an MBR (Meane Biological Reactor) membrane of engineering bacteria fed by using activated carbon as a carrier, which belongs to the technical field of sewage treatment, and has the process that a sloping plate sedimentation tank and a sand filter are prepositioned, thoroughly removing particulate matters in inflow water, the length-width ratio of an aeration tank is 3:1, the depth of the tank is 5-6m, an MBR membrane component is placed on the tail end of the aeration tank, an aerating system comprises a plurality of groups of liftable micropore aerator pipes, overhauling and replacement can be carried out at any time without affecting operation of the system when failures occur, the activated carbon adopts 300-mesh powdered carbon, the feeding amount reaches 30-40 percent under the condition of normal water level SV 30, the MBR membrane component adopts a high-quality microfiltration membrane with the hole diameter being 0.1 mum, spoil disposal is not carried out when the system is in operation, aged sludge can be removed through aerobic digestion, and the MBR membrane process adopts a parallel pump to discharge water. The process technology is simple, is stable to operate, is simple to manage, and has low energy consumption, convenience in maintenance, low manufacturing cost, and easiness in adjustment.

The invention discloses a method for restoring algal-inhibition submerged vegetation in the eutrophic water, and relates to a technology for large-area and large-scale water environment biological control. The invention comprises the following steps: 1, selection of submerged vegetation (10); 2, selection of clay (20); 3 modification of clay (30); 4, transplantation of vegetable (40); and 5, implementation and management (50). The invention has the advantages of simple method, low cost, convenience in material selection and construction and remarkable effect, can effectively improve water quality and water transparency, remarkably decreases nutrient salt, maintains the stability of water in the oligotrophic state, can quickly restore submerged vegetation in eutrophic shallow lakes, and issuitable for restoration works for lake aquatic vegetation and diversified lakes water plants or lake aquatic ecological system ecological reconstruction works.

The invention discloses a method for repairing a reservoir hydro-fluctuation belt by use of bermuda grass. The method comprises steps of firstly investigating and screening plants on the reservoir hydro-fluctuation belt of the Baihua lake so as to screen out plants capable of growing on the reservoir hydro-fluctuation belt; then carrying out indoor and outdoor simulation experiments for the bermuda grass so as to detect adaptability of the bermuda grass to the reservoir hydro-fluctuation belt, and determining that the bermuda grass can be planted on the reservoir hydro-fluctuation belt; and at last, cultivating the bermuda grass on the reservoir hydro-fluctuation belt and performing ecological repairing on the reservoir hydro-fluctuation belt. In this way, via systematical research, it is found that the bermuda grass is capable of growing on the reservoir hydro-fluctuation belt which has been soaked in water and exposed to water for a long time, and with certain biomass, the bermuda grass can largely protect landscape ecology of the reservoir hydro-fluctuation belt and preventing water and soil loss.

The invention discloses a method for producing microalgae by utilizing industrial waste water and waste gas of biobutanol, and an application of the method. The method comprises the steps that waste water and waste gas treatment is combined with microalgae culture, and the industrial waste water and waste gas of biobutanol is utilized for preparing a microalgae liquid culture medium and producing the microalgae. The method makes full use of the industrial waste water and waste gas of biobutanol, and residual nutrient ingredients of biobutanol; contents of nutrient elements to be added are lower; the cost is low; the waste water and waste gas treatment is achieved while the microalgae is cultured; effective utilization of resources and zero emission of pollutants are achieved; and environmental pollution is prevented. The method for producing the microalgae by utilizing the industrial waste water and waste gas of biobutanol can be applied to industrial microalgae production; the obtained microalgae can be used for preparing high value-added products such as algin feed, astaxanthin, carotenoids or xanthophylls; and the method has a good economic benefit.

The invention relates to a method for preserving spinach and belongs to the technical field of vegetable preservation. The method comprises the following steps of: (1), harvesting the spinach which meets a harvesting specification in time; (2), quickly precooling the spinach to be between 4 and 7 DEG C; (3), subpackaging the spinach into a special spinach freshness protection package, fastening a pocket opening, and placing the package into a refrigeration storage with the temperature of between -1 and 2 DEG C and a humidity of 90 to 98 percent; then unfastening the pocket opening after 2 to 3 hours, inserting a blank pipe with an inner diameter of 30mm, then fastening the pocket opening for keeping venting quality of the pocket opening, and automatically adjusting a gaseous environment in the package, wherein the content of CO2 is 2.5 to 8 percent and the content of O2 is 8 to 12 percent; and (4) unfastening the pocket opening every 5 to 7 days serving as a period, ventilating for 2 to 3 hours, and then inserting the blank pipe again for the management of fastening the opening until preservation is completed. The method has low cost, simple and easy operation, good preservation effect, and the spinach keeps excellent commercial quality after 25 days; and the method can be applied to broad vegetable growers, major dealers or processing enterprises.

The invention relates to an oxygenation purifying system adopting bodybuilding equipment and a water body. The oxygenation purifying system comprises the bodybuilding equipment and a compression oxygen supply box, and further comprises an oxygen box, an oxygenation machine and a system display and signal transmissiong system. The bodybuilding equipment comprises a transmission mechanism and transmission spiral or paddle-type fan blades in transmission connection with the transmission mechanism. The compression oxygen supply box is arranged on the peripheries of the transmission spiral or paddle-type fan blades. The oxygen box is connected with the transmission spiral or paddle-type fan blades through a one-way check valve. One end of the oxygenation machine is connected with the oxygen box through a connecting pipeline, and the other end of the oxygenation machine is connected to a microbubble releasing device. The system display and signal transmission system is connected with the bodybuilding equipment and used for displaying the exercise amount, the conversion air volume and the water volume oxygen supply amount. The oxygenation purifying system and method need no energy in wastewater treatment and are a new wastewater treatment scheme which has the advantages that the method is easy and convenient to implement, low in cost, high in purifying efficiency, obvious in effect, high in mobility, fast in popularization and the like, and the effects of popularization of national bodybuilding and green energy utilization can be achieved.

The invention provides an organic camellia oil production process which comprises the following steps of: drying; sorting; uniformly stacking, bagging; squeezing oil; carrying out molecular deodorization; and freezing. According to the invention, camellia fruits are dried with hot air at constant temperature, and hot-air temperature is controlled to be between 30 DEG C and 50 DEG C to prevent the raw material from being burnt and protect the original nutritional components and active components in the raw material from being damaged, so that the original nutritional components contained in the camellia oil are retained. The organic camellia oil production process provided by the invention can increase the camellia oil contained in same camellia fruits by 20%, save the cost by 20% and increase the nutritional components by 35%. According to the organic camellia oil production process, in the early-stage raw material processing and control, benzopyrene content, acid value and peroxidation value of camellia oil reach the national standards; only molecular deodorization and frezzing process are carried out on the camellia oil in the later stage without addition of any additives, the nutritional components of the camellia oil are greatly improved, thereby achieving really organic, original and gree camellia oil; moreover, the processing cost is reduced by 28%.

The invention relates to the technical field of food processing and wine brewing, in particular to a raw material wine brewing technology. The raw material wine brewing technology comprises the following steps: smashing raw materials, fermenting ingredients, distilling to obtain wine, and putting into bottles. In the technology disclosed by the invention, raw material stewing is not required, fermentation can be directly carried out, and therefore, production working procedures are simplified. Compared with a traditional wine brewing technology, the raw material wine brewing technology disclosed by the invention is characterized in that fermentation time is obviously shortened, and manpower and energy consumption can be saved by about 70-80%. In addition, the raw material wine brewing technology has the advantages of high wine yield and good product quality, the contents of nutrition ingredients including protein and the like in vinasse as a by-product are relatively high, and the vinasse can be used as an ideal low-cost fodder raw material.

The invention belongs to the field of refining of vegetable oil, and particularly relates to a making method of sesame oil capable of reducing blood lipid. The making method is characterized by comprising the following steps: (1) cleaning sesame seeds, and airing the cleaned sesame seeds for two days; (2) mixing the aired sesame seeds and traditional Chinese medicines so as to obtain a mixture, frying the mixture with a frying pan for 20 minutes at the frying temperature of 100 DEG C, and then separating the sesame seeds from the traditional Chinese medicines with a mesh sieve; (3) cleaning mulberries, pulping the cleaned mulberries into coarse mulberry juice, and filtering the coarse mulberry juice so as to obtain mulberry juice; (4) decocting the traditional Chinese medicines with water so as to obtain a traditional Chinese medicine solution; (5) mixing the mulberry juice and the traditional Chinese medicine solution so as to obtain a mixed solution, then putting the sesame seeds into the mixed solution, soaking the sesame seeds into the mixed solution for three hours, and then putting the mixed solution together with the soaked sesame seeds into a freezer for refrigeration at the refrigerating temperature of minus ten DEG C; (6) then putting the refrigerated sesame seed mixture into an oil press, and pressing the refrigerated sesame seed mixture so as to obtain a sesame oil mixture; and (7) performing filtration on the sesame oil mixture through an active carbon filter, and then performing centrifugation and oil-water separation so as to obtain the sesame oil. The sesame oil has the effect of reducing blood lipid, and the aromatic odor of the sesame oil is also enhanced.

The invention belongs to the technical field of antibacterial material preparation and application, and relates to a preparation method and application of a double-enzyme active antibacterial material, and the specific process steps are as follows: dispersing iron molybdate in an acetate buffer solution with the pH value of 4, adding glucose oxidase, stirring for 10 minutes at normal temperature at 200-300r / min, then centrifuging, collecting precipitate, and freeze-drying to obtain the double-enzyme active antibacterial material. The double-enzyme activity antibacterial material Fe2 (MoO4) 3 (at) GOx of the iron molybdate loaded glucose oxidase is obtained; fe2 (MoO4) 3 (at) GOx has excellent peroxidase and glucose oxidase activity and can reduce the damage of exogenous hydrogen peroxide to tissues in bacteriostatic application, and a hunger therapy generated by glucose oxidase can cooperate with active oxygen generated by iron molybdate to efficiently resist bacteria; the preparation method is simple and has efficient antibacterial performance, the whole process is green, environment-friendly and pollution-free, and the application prospect is wide.

The invention discloses a pig premix feed with low protein, high amino acids and high digestion and utilization rate. The pig premix feed comprises the following ingredients in percentage by weight: 10-30wt% of 46% soybean meal, 10-30wt% of fermented soybean meal, 10-30wt% of corn DDGS, 3-8wt% of fish meal, 3-6wt% of dicalcium phosphate, 5-15wt% of stone powder, 1-3wt% of sodium chloride, 1-3wt% of a multi-vitamin premix agent, 1-3wt% of a multi-mineral premix agent, 0.1-0.5wt% of phytase 10000, 0.1-0.5wt% of complex enzymes, 0.1-0.5wt% of micro-ecological funguses, 0.5-1.0wt% of 70% choline chloride, 5-15wt% of 70% feed-level lysine, 0.1-0.5wt% of methionine, 0.2-0.7wt% of threonine, 0.05-0.15wt% of tryptophan, 0.05-0.15wt% of valine, 0.1-0.4wt% of a solid antioxidant, 0.1-0.3wt% of a mildewproof agent, 0.05-0.2wt% of a sweetening agent, 0.05-0.2wt% of a flavoring agent and 0.05-0.2wt% of an acidulant. The problems of high cost of ingredients, high feed conversion rate, serious pollution of dung and urine and the like caused by high protein content in designed feeds are solved; and besides, the use of soybean products is reduced, protein raw materials are saved, the food supply pressure is alleviated, and the dependence of China on imported soybeans from foreign countries is reduced.

The invention discloses a method for removing cyanobacterial bloom, comprising the following steps of: drawing algae-containing water into a curved water channel; breaking bladder of algae in the algae-containing water flowing through the curved water channel by the utilization of supersonic wave so as to make the algae sink and simultaneously breaking the cell wall of the algae in the algae-containing water by the utilization of supersonic wave; inputting the algae-containing water which has undergone ultrasonic treatment during the step 2 into a flocculation reaction tank and carrying out flocculation treatment by the use of a safe flocculating agent; inputting the algae-containing water which has undergone flocculation treatment during the step 3 into a flocculation settler for settlement so as to obtain a sediment and a supernatant; and discharging the supernatant. The invention also discloses an apparatus for removing cyanobacterial bloom. The apparatus contains a water pumping device, an ultrasonic treatment pool, a flocculation stirring pool, a settling basin and a power supply device. The method provided by the invention is easy to operate. The apparatus provided by the invention can be used to remove cyanobacterial bloom more thoroughly and efficiently, effectively purify the algae-containing water and effectively minimize nutrients in water, and can operate without maintenance for a long time.

The invention discloses a nutrient health food and a production technology thereof, which are based on the philosophy of health of the traditional medicine of motherland. Five types of beans are used as basic constituents, five-color foods are used for nursing five internal organs, and nutrition is balanced; and the stachyose, which is an important substance in the natural plant stachys floridana, is combined with the five kinds of beans, so that the nutrient health food can improve health, regulate the intestinal canal and improve absorption. Specifically speaking, the invention provides a nutrient health food, which contains, by weight part, the following nutrition constituents: 30-60 parts of soya beans, 5-10 parts of mung beans, 5-10 parts of azuki beans, 0.3-5 parts of white kidney beans, 1-10 parts of black soya beans and 0.01-5 parts of the stachys floridana; and right amount of sugar and salt also can be added in the food according to different tastes. The nutrient health foodimproves the flavor of the food as mush as possible on the basis of keeping balance nutrition, and no additive is added in the food, so that the food is nutritious food produced by process science.

The invention discloses a restoring method for a plateau reservoir hydro fluctuation belt through Knotgrass. Indoor and outdoor flooding simulation experiments for the Knotgrass are conducted to detect adaptability of the Knotgrass to the hydro fluctuation belt flooding environment; the Knotgrass is determined to still live after long time flooding; then the Knotgrass is introduced to the plateau reservoir hydro fluctuation belt; and after successful introduction, daily fertilizer and water management is conducted to the Knotgrass. The Knotgrass suitable for the plateau reservoir hydro fluctuation belt is found via systematical research; the Knotgrass is suitable for long term flooding of the plateau reservoir and can grow in the living environment exposed to the outside after flooding; certain biomass is achieved; certain landscape value is realized; and a certain protection action is conducted to water and soil loss of the plateau reservoir hydro fluctuation belt. By the use of the cultivation method for the Knotgrass in the plateau reservoir hydro fluctuation belt, the Knotgrass possesses high transplantation survival rate; and the Knotgrass can healthily grow with high efficiency on the hydro fluctuation belt.

An insoluble phosphate bioleaching method is characterized in that insoluble phosphate raw materials are crushed and sieved by a 2mm sieve, bacillus is qualitatively and quantitatively measured by a phosphate dissolving ring and a liquid shake flask culture medium, efficient strains with high phosphate dissolving capacity is screened, 2-8ml screened efficient strains are inoculated into 100ml of nutrient broth media and cultured for 3-5 days under the condition of 25-35 DEG C and 100-150r / min to serve as bacteria, 10% of sucrose is added into clear water and serves as a nutrient source, 1-7% of insoluble phosphate raw materials are added, 2-8% of the cultured bacteria are inoculated and cultured for 7-10 days under the condition of 25-35 DEG C and 120-160r / min, and solid residues and culture solution are separated until the content of water-soluble phosphorus in the culture solution is higher than or equal to 100mg / L. The selected bacteria have an efficient phosphate dissolving function and are high in phosphate bioleaching rate, the content of beneficial microorganisms in soil can be increased, and phosphorus use rate is increased.

The invention relates to the technical field of microalgal cultivation and industrial wastewater utilization, in particular to a method of cultivating chlorella by using brewery industry wastewater and application of the method. According to the method, wastewater treatment and microalgal cultivation are combined, heterotrophic features of chlorella are utilized with respect to the nowadays' trend that water eutrophication is increasingly serious, waste resourceful treatment and utilization are achieved, the content of nutrient elements to be added is lower, and the cost is low; economic and social comprehensive benefits are higher.

The invention provides feed for culturing leeches and a preparation method of the feed. The feed for culturing the leeches is prepared from snail powder, freshwater mussel powder, blood powder, egg white, soybean meal, activin, rapeseed cakes, olive oil, potassium sulfate, potassium dihydrogen phosphate, sodium citrate, calcium lactate, calcium hydrophosphate, magnesium sulfate, potassium chloride, lentinan, chitosan, milkvetch root powder, radix salviae miltiorrhizae powder, garlic powder, sorbitol, compound microbial bacteria, complex vitamin, trace elements and an antioxidant. The feed is rich in nutritional ingredient, comprehensive in nutrient element, capable of effectively supplementing nutritional ingredients needed by leech growth, effectively promoting growth, shortening the leech growth cycle, reducing the culturing cost and increasing the economic benefit, free of pollution to a water body and friendly to the environment. The preparation method of the feed for culturing the leeches is simple and practicable in process, high in production efficiency, low in production and preparation cost, mild in preparation condition, easy to achieve, beneficial for market popularization and good in economic benefit.

The invention belongs to the extraction technology of natural active substances, and in particular relates to a method for dynamic circulation and on-line monitoring ultrasound-assisted extraction of biological active substances. The specific steps of the method include: (1) filling solvents in extraction pipes and pipelines; (2) Ultrasonic treatment; (3) monitoring the extraction situation; (4) completing the extraction of biologically active substances. The dynamic cycle ultrasonic-assisted extraction and on-line monitoring coupling method provided by the present invention is carried out in a closed system, which can effectively prevent oxidation or material volatilization, has high extraction efficiency of biologically active substances, and can be used to extract biologically active substances such as polyphenols, Flavonoids, polysaccharides or anthocyanins.