Water-saving marine fish culture water purification plant and method

Abstract

The invention provides a water-saving marine fish culture water purification plant which comprises a drain outlet arranged in the center of a fish pond and a mechanical foam separator arranged in thefish pond, wherein outlet water flow of a water outlet of the mechanical foam separator pushes a water body in the fish pond to rotate around the drain outlet along the flowed water direction of the mechanical foam separator, sewage is drained from the drain outlet through a sewage pipe, and foam which is rich of tiny suspended particles and soluble organic substances and is generated by the mechanical foam separator is drained from a pipeline on the lateral wall of the fish pond; by utilizing push flow, oxygenation and other functions of the mechanical foam separator, on one hand, the foam rich of a large quantity of tiny suspended particles and soluble organic substances in the fish pond is drained, and on the other hand, sewage such as uneaten food, fish feces, and the like deposited atthe bottom of the fish pond can be collected to the drain outlet through push flow to drain. The invention has the oxygenation function and can completely meet the requirement on oxygen under the condition of 8-10kg / m<2>.

Description

technical field [0001] The invention relates to a fish breeding water purification device and a method thereof, in particular to a water-saving and energy-saving marine fish breeding water purification device and a method suitable for flounder and flounder. Background technique [0002] With the rapid development of marine fish farming industry represented by flounder and flounder in my country, the traditional "deep well sea water + greenhouse" farming mode consumes a lot of water due to the high daily water exchange rate (1-8 times / day). Underground seawater resources and the environment have caused serious pollution. Due to the limitation of water source conditions in the original flounder and flounder breeding areas, the sustainable development of the industry is in jeopardy, which has a serious negative impact on agricultural production and farmers' income. [0003] In order to change the development mode of marine fish farming industry, since the last three five-year pl...

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Problems solved by technology

[0002] With the rapid development of marine fish farming industry represented by flounder and flounder in my country, the traditional "deep well sea water + greenhouse" farming mode consumes a lot of water due to the high daily water exchange rate (1-8 times / day). Underground seawater resources and serious pollution to the environment. Due to the limitation of water source conditions in the original flounder and flounder fish breeding concentrated areas, the sustainable development of the industry is in jeopardy, which has a serious negative impact on agricultural production and farmers' income.

[0003] In order to change the development mode of marine fish farming industry, since the last three five-year plans, my country has focused on supporting scientific research on key equipment and system models of seawater recirculating aquaculture in national scientific research projects, and achieved certain results, but Due to many reasons such as the immature biological purification technology, high system construction and operating costs, and highly professional operation and management, although the closed circulation aquaculture model represents the direction of the future aquaculture industry, under the current level of productivity development, Not yet ready for full promotion

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