34results about How to "Prevent overbreeding" patented technology

The invention discloses a multi-objective optimization improved genetic algorithm based on dynamic weight M-TOPSIS multi-attribute decision-making. The method includes the steps of first determining multi-objective optimization mathematical model and genetic algorithm parameters, and establishing a constrained feasible population and a population objective function matrix; then, calculating objective weights of objective functions by using an entropy weighting method, synthesizing the mixed dynamic weights of the objective functions, performing population individual sorting by using an M-TOPSIS method based on the dynamic weights, and obtaining a Pareto temporary solution set; assigning virtual fitness values to the individuals according to the sorting, and selecting an offspring population by using a proportional selection operator and a roulette method; next, performing crossing and mutation operations on the offspring population; finally, merging the Pareto temporary solution set and the offspring population after the mutation operation to generate a new population; obtaining an optimal solution and a Pareto optimal solution set until termination conditions of the algorithm is satisfied. The method of the invention can realize the multi-objective optimization and the multi-attribute decision-making process at the same time, provides a new solution for the multi-objective optimization problem, and has a high engineering practical value.

The invention relates to a method for culturing chlorella by using sludge anaerobic digestion liquid. The method is characterized by comprising the following steps of: (1), removing suspended mattersfrom digestion liquid generated by anaerobic digestion of residual sludge drained by a secondary sedimentation tank through pretreatment to obtain sludge anaerobic fermentation liquid, and mixing thesludge anaerobic fermentation liquid with secondary effluent to perform concentration regulation to obtain pretreated wastewater; (2), carrying out habituated culturing on algae growing in an artificial culture medium in pretreated wastewater obtained in the step (1) and carrying out habituated culturing continuously at a proper light intensity and temperature; and (3), carrying out photobioreactor culturing and carrying out temperature control, hydraulic retention time control, pH control and CO2 aeration control. With the provided method, wastewater recycling is realized. On the one hand, the chlorella is used as an excellent biomass diesel raw material and resources are recycled; on the other hand, the wastewater is treated in a low-energy-consumption mode, the environment is protected.The method has main advantages of wastewater purification, nutrient element recycling, greenhouse gas capturing, oil-rich microalgae biomass harvesting and the like.

The invention relates to a method for ecology restoration and water quality maintenance of a city landscape water body by adopting reclaimed water as supply. According to the method, a composite type plant ecology system comprising two parts of an ecology bank revetment and a composite type ecology floating island is constructed, and an artificial regulation system is adopted to regulate a landscape water body, wherein the ecology bank revetment comprises a vegetation soil slope type bank revetment, a vegetation tile type bank revetment and a wetland type ecology bank revetment; bank revetments on both sides of the landscape water body are provided with multiple groups of composite type ecology floating islands, wherein each group of the composite type ecology floating islands is formed by connecting a plurality of floating island monomers, and the lower parts of each group of the composite type ecology floating islands are suspended with ecology grasses; the artificial regulation system comprises three parts of water supply regulation, water body disturbance/oxygen increase regulation and aquatic animal regulation. The method of the present invention is applicable for landscape water bodies adopting reclaimed water as a supply water source, wherein the reclaimed water meets requirements of "The reuse of urban recycling water-Water quality standard for scenic environment use". With the method of the present invention, natural ecology system construction and artificial regulation are combined, self-purification capacity of water bodies can be effectively enhanced, and landscape function of water bodies can be maintained.

The invention discloses a method for mixedly breeding sea cucumber and sepia esculenta in a pond. The method includes the steps of pond selecting, pond transforming, pond fertilizer and water preparation, young sea cucumber releasing, feed feeding, breeding management, sepia esculenta finishing and harvesting and subsequent sea cucumber breeding and harvesting. According to the method, crablat, shrimps, gobies and other enemies adverse to the sea cucumber can be caught and killed by the sepia esculenta, the utilization rate of water can be increased through mixed breeding of the sea cucumber and the sepia esculenta, and thus the sea cucumber and the sepia esculenta are bred in a mixed mode; by means of the method, the effects of value adding and synergia are achieved for the sea cucumber and the sepia esculenta, the utilization rate of water is increased, and the effects of purifying water and improving the breeding environment are achieved.

The invention discloses an improved pre-acidifying treatment process of citric acid wastewater. The process comprises the following step: precipitating overflow effluent of an anaerobic tank through a precipitating tank to obtain supernate which consists of supernate A, supernate B and supernate C, wherein the supernate A is returned and mixed with the citric acid wastewater, the supernate B is returned and mixed with acidified effluent, and the supernate C enters into subsequent steps for aerobic treatment to improve the pH value of effluent of a pre-acidifying pool and increase types and concentrations of microorganisms in the pre-acidifying pool so as to improve the pH of anaerobic inflow and reduce the impact to an anaerobic system, thereby improving the treatment efficiency of an anaerobic processor and the stability of the anaerobic treatment system, and meanwhile improving the removal rate of COD (Chemical Oxygen Demand) and the biogas production as well as lowering the operating cost of enterprises.

The invention discloses a method for cultivating chlorella by utilizing anaerobic fermentation broth of starch processing wastewater. The method includes the following steps: (1) performing pre-treatment on starch production wastewater after anaerobic fermentation to obtain starch anaerobic fermentation wastewater, performing pre-treatment on acidified organic wastewater to obtain wastewater acidizing fluid, and adding the wastewater acidizing fluid into the starch anaerobic fermentation wastewater to obtain a culture solution; (2) performing habituated culture on the algae grown in an artificial medium; and (3) performing cultivation with a photobioreactor, and performing temperature control, pH control, CO2 aeration control and hydraulic retention time control. The method realizes the resource recovery of wastewater, and as the chlorella is taken as an excellent biodiesel raw material, resources can be recycled; wastewater can be treated in a low-energy way, so that environments canbe protected, and the carbon emission reduction of high concentrated organic wastewater treatment and the resource recycling of nutrient elements can be realized in a whole process; and therefore, thechange of high concentrated organic wastewater treatment from simple pollutant removal to resource recycling can be realized.

The invention relates to a low-temperature anaerobic excrement collector, and belongs to the technical field of the medical supplies. The low-temperature anaerobic excrement collector comprises a low-temperature box, an excrement collection device and an excrement anaerobic collection device; the excrement collection device comprises a liquid sampler and a solid sampler; the excrement anaerobic collection device comprises an excrement anaerobic normal temperature collection device and an argon tube module; the excrement sample multiple-point collection, low-temperature and anaerobic transportation storage are tightly joined, the solid-state or liquid-state excrement can be collected by using above different devices in cooperation according to a check requirement, and the collected excrement is maintained at different temperatures and oxygen environments in the transportation, such as aerobic low-temperature environment, the anaerobic low-temperature environment, the aerobic normal temperature environment or the anaerobic normal-temperature environment, and an anaerobe detection rate is improved; the used low-temperature material is the macromolecule polymer taking sodium polyacrylate and water-absorbent resin as the main raw material, the material can be precooled at different degrees by placing in refrigerators or liquid nitrogen at 4 DEG C, -20 DEG C, and -80 DEG C, and thenis supplemented by the low-temperature environment formed by a low-temperature box made from the thermal insulation material.

The invention relates to an ecological prevention and control method for excessive multiplication of large algae in a stichopus japonicas aquaculture pond. The ecological prevention and control methodaims at solving the problem that chemical algicide harms stichopus japonicas and the ecological environment of pond water, the problems that the labor intensity of manual fishing is large, and the prevention and control effect is poor, the problems that the control effect of a shading method is poor, and growth and reproduction of beneficial microalgae are influenced, and the problems that if pure algivore is stocked, the prevention and control effect is poor, and the algivore fights for nutrition and inhabiting space with the stichopus japonicas. The ecological prevention and control methodcomprises the steps of applying fertilizer and water in advance, applying fertilizer and water in the breeding process, applying a microbial preparation and stocking the algivore. By means of the ecological prevention and control method, the number of animals and plants in the pond reaches dynamic balance, while excessive multiplication of the large algae is effectively prevented, the ecological environment of the pond water is improved, growth and development of the stichopus japonicas are promoted, and the quality of the stichopus japonicas is improved.

The invention belongs to the field of water purification, and particularly relates to an abalone culture water purification method which comprises the following steps: preparing a water purification cage, pretreating the water purification cage, releasing abalone fries, and adding a ferrous sulfate-copper sulfate-ferric sulfate mixture and a sodium percarbonate mixed solution which can enable abalones to be cultured on various marine bottoms and can purify the culture water.

The invention relates to an ecological reef device for purifying water quality by utilizing an alga, snail and fish symbiotic system. An ecological reef shell is arranged on the surface of the ecological reef main body, a lifting ring is arranged above the ecological reef main body, a waterproof lamp, an air bag, an upper isolation net and a lower isolation net are arranged in the ecological reefmain body, the air bag is connected with one end of an air conveying pipe, and the other end of the air conveying pipe is connected with air production equipment on the ground. Holes are reserved in the portion, between the upper isolation net and the lower isolation net, of the ecological reef shell, black carps and snails enter the ecological reef main body through the holes, an aeration deviceis arranged below the lower isolation net, artificial aquatic plant filler and hornwort are planted on the lower isolation net, and a fixing device is arranged below the ecological reef body. By constructing an algae snail fish ecological food chain, water purification, aquaculture and ecological restoration are integrated, maximum utilization of lake and reservoir water area space resources is achieved, the black carp culture cost is reduced, and a water area ecological system is restored.

The invention provides a lakeside zone for intercepting and purifying non-point source pollution. A first step land, a first depression land, a second step land, a second depression land, a third stepland and a third depression land are sequentially arranged outwards along a lake area, and a flow guide pipe is embedded in the bottom of the third step land; the cross sections of the three stages of step lands are trapezoidal, and the elevations of the three stages of step lands are increased step by step; the cross sections of the first depression land and the second depression land are inverted trapezoids, the cross section of the third depression land is concave, and the elevations of the three stages of depression lands are increased step by step; flood-tolerant emergent aquatic plantsare planted on the first step land, and drought-tolerant emergent aquatic plants are planted on the second step land and the third step land; and floating plants are planted in the first depression land, flooding-resistant emergent aquatic plants are planted in the second depression land, and turf is planted in the third depression land. According to the method, the terrain of the lakeside zone isreconstructed into multiple stages of step lands and depression lands, so that the stagnation time of non-point source pollution on the lakeside zone can be effectively prolonged, the non-point source pollution is prevented from directly entering the lake area, and favorable conditions are created for absorption and purification by aquatic plants in the lakeside zone.

The invention relates to an ecological water environment treatment system and a process thereof. The treatment system comprises a shore-based isolating system and a water area purifying system, wherein the shore-based isolating system comprises an ecological green land and an adsorption layer; terrestrial plants are planted on the ecological green belt; part of the adsorption layer is positioned on the ecological green land; the other part of the adsorption layer is positioned below the ecological green land; the water area purifying system is connected with the shore-based isolating system through a slope; the water area purifying system comprises a water area and an ecological floating bed arranged in the water area; and aquatic plants are further arranged in the water area. The shore-based isolating system and the water area purifying system define a complete ecological system; the ecological water environment treatment system integrates multiple functions of water purifying, landscape constructing, resource utilizing and the like, and has great popularization and application value.

The invention relates to a concentration method and equipment, in particular to the concentration method and equipment for concentrating dairy products by adopting a reverse osmosis technology. The concentration method comprises a step of performing reverse osmosis concentration treatment on raw milk by using a reverse osmosis film, wherein the reverse osmosis concentration treatment comprises low-pressure reverse osmosis concentration treatment and high-pressure reverse osmosis concentration treatment; the low-pressure reverse osmosis concentration treatment means that the reverse osmosis concentration treatment on feeding materials is carried out by adopting a first predetermined pressure, and the high-pressure reverse osmosis concentration treatment means that the reverse osmosis concentration treatment on the feeding materials by adopting a second predetermined pressure, and the first predetermined pressure is less than the second predetermined pressure. The concentration equipmentcomprises a temporary memory unit, a homogenizing unit and corresponding concentration units. Through arrangement of a low-pressure reverse osmosis concentration treatment unit and a high-pressure reverse osmosis concentration treatment unit, feed liquid can be concentrated quickly and effectively.

The invention relates to a method applied to a sewage treatment system and used for removing heavy metals. The sewage treatment system comprises a primary sedimentation tank and an aeration tank, wherein blue-green algae are cultured in the primary sedimentation tank and flow into the aeration tank naturally along with sewage; the blue-green algae refer to filamentous and suspended blue-green algae; the blue-green algae refer to spirulina or anabaena.

The invention discloses probiotic flavored fermented milk without cane sugar and sweetening agent. The probiotic flavored fermented milk comprises the following components in percentage by weight: 4.0-15.0% of fruit juice, 0.001-0.006% of leavening agent and the balance of raw milk, wherein the total weight percentage of the raw milk is 100%. The invention also discloses a preparation method of the probiotic-flavored fermented milk without sucrose and sweetening agent. By adjusting the formula and not additionally adding cane sugar or a sweetening agent, the product is natural in sweetness and free of bitterness, the immune system of children can be effectively adjusted, and the risk of infant eczema and gestational diabetes mellitus is reduced. Meanwhile, a conventional fermented milk production process is optimized, and a low-temperature stirring and mixing method is adopted, so that the energy consumption is effectively reduced, the high-temperature time of the materials is shortened, and excessive propagation of harmful bacteria is avoided.

The invention belongs to the technical field of breed conservation cultivation, and particularly relates to a breed conservation cultivation method for zebra fish. According to the method, a beneficial bacterium-green alga-paramecium-zebra fish food chain type single-cylinder aquatic ecological culture system is established, zebra fish embryos are stably hatched and grow in the ecological system,fodder does not need to be additionally added except for supplementing a translucent container for evaporated water, the pH value, dissolved oxygen and other conditions in water do not need to be maintained manually, the operation is simple, the method is economical and efficient, the zebra fish embryos can be stably hatched and grow into the adulthood, a large number of adult zebra fish can be stably obtained when young zebra fish grow into the adulthood, the control of environment system conditions in general cultivation is omitted, a large amount of time is reduced, and the purposes of laboratory breed conservation and obtaining a large number of adult zebra fish are achieved.

The invention provides an anti-pollution bacterial culture device for a clinical laboratory, and relates to the technical field of bacterial culture. An outer wrapping box is arranged in the supporting frame, an interlayer is arranged on the outer portion of the outer wrapping box, a connecting pipe is arranged on the upper portion of the front end of the outer wrapping box, a connecting pipe is arranged on the lower portion of the rear end of the outer wrapping box, an inner supporting frame is placed in the outer wrapping box, the inner supporting frame is in an annular shape, and four supporting rods are arranged in the inner supporting frame. Light sources generated by the four irradiation lamps penetrate through a through groove in the upper end of the sleeve to enter the inner portion of the sleeve, photosensitive sterilization irradiation is conducted on the upper end of the culture tube, illumination sterilization treatment is conducted on the upper end of the interior of the culture tube, and the light sources are reflected through the limiting ring according to the design that the inner side of the limiting ring is of a wide-end-up shape; and sterilization light rays generated by the four irradiation lamps are prevented from irradiating the lower part of the culture tube. The problem that the culture quantity of bacteria cannot be controlled when the bacteria are cultured and propagated is solved.