Method for regenerating Macrobrachium rosenbergii breeding waste seawater

Abstract

The invention relates to a method for regenerating waste seawater generated during the giant freshwater prawn culturing process, and belongs to the field of the energy-saving and discharge reduction and water area ecology protection technology. The method is characterized in that the method comprises five steps, namely wastewater filtration, settlement, oxidation and disinfection, water storage purification and magnetization. The processes of filtration, settlement, water storage and water quality activation are separately treated; the combined process that the waste seawater can automatically flow or be closed can be achieved in each functional area; water consumption energy resources are not required; and the production process is simplified, thereby being favor of greatly reducing the wastewater processing cost and improving the investment benefit; the water processing quality and the seed culturing effect of the regenerating seawater can be ensured by applying the technologies such as agglutination and settlement, oxidation, water quality activation and the like; the working platform can be used for processing the seed culturing wastewater containing antibiotic; the regenerating seawater after being processed has no toxicity and public hazard to aquatic animals and humans; and the invention has low cost and is suitable for popularization and application in domestic giant freshwater prawn seed culturing yards.

Description

technical field [0001] The present invention relates to a method for regenerating the waste seawater produced in the process of growing Macrobrachium rosenbergii seedlings, in particular to an artificial water quality that purifies the waste seawater discharged in the process of growing Macrobrachium rosenbergii seedlings and then uses it in the production of seedlings. The purification technology belongs to the technical field of energy saving, emission reduction and water ecological protection. Background technique [0002] Macrobrachium rosenbergii (de Man) is one of the shrimp species introduced in my country that has formed large-scale and industrialized production. In recent years, with the expansion of the breeding area, the production of shrimp seedlings has also increased, and the amount of waste artificial seawater discharged from the nursery production is also increasing year by year, and the pollution of lakes, rivers or ponds is also increasing. At present, the...

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Problems solved by technology

The above water purification method ① is suitable for use in water without antibiotics, but it is difficult for biofilms to survive when used in the waste water of Macrobrachium rosenbergii nursery, so the effect is poor

② Disinfection with slow-release drugs such as chlorine dioxide and dibromohydantoin, the oxidation effect is not good, and the drug residue time is long, which is not conducive to recycling

③The above-mentioned water purification process needs to adopt multi-stage sedimentation purification treatment, the energy consumption of multiple water extraction is high, and there is no continuity, the project cost is high, and the actual promotion and application value is low

④Using biological filters to purify water quality requires that the content of organic matter should not be too high, otherwise it is easy to block, so the treated wastewater usually only circulates once and must be discharged into the sewer, which cannot continue to be used, and the problem of environmental pollution still exists

⑤ The use of biological filters and foam separators requires a large investment and covers a large area, and the cost of regenerated seawater is higher than that of newly prepared artificial seawater. Therefore, there are obvious defects and deficiencies in the existing methods for purifying waste seawater from Macrobrachium rosenbergii nursery

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