Water for ocean aquaculture, preparation method and application

Abstract

The invention provides water for ocean aquaculture, which adopts 5-25% low-salinity ocean water and is prepared by the following method. The method comprises the following steps of: (1) precipitating; (2) filtering; (3) filtering with a micro-filtration membrane; (4) adopting a reverse osmosis membrane for separation, and enabling the concentration of the concentrated liquid to reach 2.8-3.5% in salt content; and the permeated liquid becomes fresh water and the concentrated water becomes water for ocean aquaculture. The invention also provides an application of water for ocean aquaculture. The water for ocean aquaculture provided by the invention has the advantages that the invasion and the hazard of pathogenic factors of pollutants in a natural sea area can be avoided; compared with utilization of coarse salt for preparing concentrated ocean water, the acquisition expense of the coarse salt is saved, the fresh water can be used for aquaculture production of ocean water or life, so that the total cost is obviously reduced, the economic benefit is obvious; and more importantly, the survival rate of breeding and aquaculture of marine organisms is increased, the quality safety level of the marine organisms and offspring seeds is greatly improved, and meanwhile, the problem of the source of the fresh water for desalted domestication of the offspring seeds is solved.

Description

technical field [0001] The invention relates to water for marine aquaculture, a preparation method and use. Background technique [0002] As the strategic focus of the world's developed countries shifts to the ocean, the marine industry has become a new growth point of the global economy. The development and utilization of marine biological resources, especially seawater aquaculture, has become an important part of the development of marine economy. It is estimated that by 2020, my country's demand for marine food will reach 40 million tons per year. Due to the increasing decline of offshore fishery resources, a greater proportion of marine food sources will be appealed to mariculture. my country's medium- and long-term scientific and technological development plan outlines "actively developing aquaculture, protecting and rationally utilizing fishery resources" as an important content of building modern agriculture, and clearly points out that priority should be given to th...

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Problems solved by technology

[0004] The seed cultivation technology of most species of marine animals and plants that have been developed or are being cultivated in my country has passed the test, and can provide the required seed for aquaculture production. However, seedling production is often affected by natural conditions and various unknown factors, and the abundance is uncertain. Relying on the weather is a big factor, and is extremely vulnerable to natural disasters such as heavy rains and red tides

There are many coastal estuaries and harbors in Zhejiang and other provinces and cities. Affected by coastal runoff and rainwater, it is easy to cause changes in the salt content of coastal seawater. , frequent red tides, deterioration of the marine ecological environment, etc., thus affecting the survival rate of marine biological breeding and breeding

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