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123results about How to "Improve the substrate" patented technology

Calcium peroxide preparation used for water fast oxygenation and preparation method thereof

The invention relates to a calcium peroxide preparation used for water fast oxygenation and a preparation method thereof which belong to the technical field of water quality treatment and are used for solving the problem that the prior calcium peroxide product has slow oxygenation effect and is not easy for applying. The technical proposal is as follows: the preparation is made from the raw materials with the weight portions as follows: 60 to 80 portions of calcium peroxide, 0.5 to 4 portions of adhesive, 10 to 20 portions of stabilizing agent, 0.2 to 2 portions of parting agent and 10 to 20 portions of exciting agent. The invention has the obvious advantages as follows: 1. the invention can increase the oxygen content of water fast, improve the water quality, eliminate pathogenicbacteria and deodorize; 2. the product can subside to the bottom of the water after being put into the water, increases the oxygen content of the water completely and also can disinfect the water from bottom to top; 3. the product has good stability and long shelf life and is not decomposed easily under normal state, the effective period can be more than one year; and 4. the invention has simple operation, is convenient for using and is safe and effective.
Owner:HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY

Method for breeding Pelteobagrus fulvidraco fry in pond

The present invention discloses a method for breeding Pelteobagrus fulvidraco fry in a pond. The method comprises the following steps: pood preparation, pood pretreatment, water fertilizing, fry placing, fry feeding management, and water quality control. According to the method disclosed by the present invention, Pelteobagrus fulvidraco powder feed prepared by mixing eel feed with Leiocassis longirostris Gunther feed are used to feed the Pelteobagrus fulvidraco fry, and the growing speed and survival rate of the fry are effectively improved; the feed coefficient is reduced; potassium hydrogen sulfate mixing powder is used to improve the pood bottom substratum; meanwhile the culture density is improved, probiotic bacteria fermented by mixing lactic acid bacteria, bifidobacterium, bacillus subtilis and the like are used to adjust water quality and to lower the ammonia nitrogen concentration in the water body, so that the ecological environment suitable for growth of the Pelteobagrus fulvidraco fry is created, and the survival rate of bred fry is improved. According to the method, reasonable light-adjusting, air charging, temperature control, water-adjusting, and feeding are adopted, so that healthy Pelteobagrus fulvidraco fry can be provided, and the method is an optimal Pelteobagrus fulvidraco fry breeding method.
Owner:NANNING UNIV

Ecological breeding method of breeding penaeus vannamei boone, crucian and chub in mixed mode

The invention discloses an ecological breeding method of breeding penaeus vannamei boone, crucian and chub in a mixed mode. The method includes the steps of preparing a pond, cleaning the pond, inputting water, disinfecting the pond water and richening the water sequentially before throwing in fingerlings and shrimp larvae, throwing in white gold crucian and chub, and then throwing in penaeus vannamei boone larvae. Compared with the prior art, the method has the advantages that the thrown-in white gold crucian does not rob food from the penaeus vannamei boone, the organic content at the bottom of the pond can be greatly decreased, and a substrate is effectively improved; the chub bred in the mixed mode has a good effect on adjusting the balance of algae in a water body, and the water quality can be effectively improved; the substrate and the water quality of the pond can be comprehensively improved by throwing in the fingerlings first, the harm caused by organic matter in bottom mud to the penaeus vannamei boone larvae are further reduced, and the stocking success rate of the penaeus vannamei boone larvae is ensured; the perfect combination of the penaeus vannamei boone, the crucian and the chub has great significance on penaeus vannamei boone breeding environment adjustment, disease prevention and income increase.
Owner:PEARL RIVER FISHERY RES INST CHINESE ACAD OF FISHERY SCI +1

Babylon shell and sea cucumber factory mixotrophic culture method

The invention relates to a Babylon shell and sea cucumber factory mixotrophic culture method. Before seedlings releasing and cultivation of Babylon shells, sea cucumbers are released, water flows to activate aquiculture water and bottom sand; healthy Babylon shell seedlings are selected and are released after being disinfected; bait of the Babylon shells is mainly fresh small trash fishes, a strategy that the bait is stopped regularly and irregularly is employed, and the sea cucumbers do not need to be fed; a series of environment control strategies are combined to control the water quality and bottom sediment indexes to meet appropriate standards, and disinfectant and medicament are not used during the whole process. By changing the culture mode, the bottom sand deterioration is prevented by means of the biological action, the incidence rate of the Babylon shells during the culture period is effectively reduced, at the same time, the cost is reduced, the product varieties are increased, the culture products are healthy and pollution-free, and the Babylon shell and sea cucumber factory mixotrophic culture method plays an important role in developing the Babylon shell aquaculture industry.
Owner:中国水产科学研究院南海水产研究所热带水产研究开发中心

Oxygen-increasing type solid stabilized chlorine dioxide, and preparation method and application thereof

The invention provides oxygen-increasing type solid stabilized chlorine dioxide, and a preparation method and application thereof. The raw materials of the oxygen-increasing type solid stabilized chlorine dioxide comprise 15 to 40 percent of chlorite, 20 to 34 percent of solid protonic acid, 5 to 30 percent of peroxide and 30 to 50 percent of protective agent. The preparation method comprises the following steps: throwing the protective agent into blending equipment and adding the solid protonic acid; after mixing the materials for 15 to 25 minutes, sequentially adding the peroxide and the chlorite and blending for 25 minutes; and after weighing the blended materials, directly sealing and packaging or directly pressing the materials in die-pressing equipment into tablets, granules, columns or balls and packaging to obtain the oxygen-increasing type solid stabilized chlorine dioxide product. The chlorine dioxide prepared by the method can serve as disinfectant, also can serve as an oxygen-increasing agent, is suitable for disinfection, oxygen increment, disease prevention and disease resistance for aquaculture, and can improve the water quality, promote the nitrification, reduce the ammonia nitrogen content of water area, improve the substrate of a pond and eliminate hydrogen sulfide.
Owner:QINGDAO UNIV

Device for treating eutrophication water blue algae

The invention discloses a device for treating eutrophication water blue algae. In the device, an ultrasonic alga-removing device is fixed on the inner wall of a reaction tank; an alga-collecting pipe is connected to a side upper part of the reaction tank with a height corresponding to a water surface; a booster pump is arranged outside the other side of the reaction tank; the input end of the booster pump is communicated with the reaction tank through a pipeline, while the output end is communicated with a hydraulic cavitation jet device through the pipeline and a flowmeter; one end of the hydraulic cavitation jet device is fixedly connected with the reaction tank through a flange and the end port is a jet inlet communicated with the reaction tank; the other end of the hydraulic cavitation jet device is communicated with a starting end of a return pipe and the end port is a jet outlet; two reducing pipes which are symmetrically arranged and reduced towards the middle are communicated with each other between the jet inlet and the jet outlet; the middle reducing part forms a throat pipe; and the throat pipe is communicated with one end of a pressurizing pipe. An ultrasonic alga-removing process and a hydraulic cavitation jet process are combined to be implemented in one device, so the device has good effects of improving the quality of bottom materials, adjusting a water temperature layer and supplying oxygen by microorganisms and fulfills the aim of removing the algae.
Owner:溧阳常大技术转移中心有限公司

Method for cultivating blue crab and green crab in autumn and winter

The present invention provides a blue crab breeding method in autumn and winter, which relates to a blue crab breeding method. The present invention provides a blue crab breeding method in autumn and winter integrating monosex cultivation, overwintering, fattening and reddening. The method described by the present invention comprises: draining water in cultivation pool and insolating bottom mud to crazing, cleaning pool by quicklime before stocking; filtering water by a water feeding screen, fertilizing and developing the pool water, selecting copulated mother crab and confirmed copulated female crab after autumn begins; selecting the stocking density of 2.2 to 4.5 per m<2>; selecting cultivation time from the beginning of October to the beginning of November, mating season to next year last ten-day period of January to the beginning of February, and culture-cycle of 3 to 3.5 months; and the method described by the present invention is characterized in that the water quality requires that the temperature is 5 to 30 DEG C, the salinity is 6 to 15, the pH is 7.8 to 8.5, the transparence is 30 to 40cm; the water changing amount per day is 20 percent to 50 percent, water added quicklime is splashed and spread into the whole pool after dissolved every ten to twenty days, the amount of quicklime is 0.02 to 0.03 kg/m<3> pool water; and the bait is fed one time every day.
Owner:XIAMEN UNIV
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