Waste recycling and tail water treatment method for water tank intensively cultured fishes

Abstract

The invention discloses a waste recycling and tail water treatment method for water tank intensively cultured fishes. The method mainly comprises the following main steps: treating cultured tail waterin a culture pond, precipitating and recycling impurities in the tail water, accelerating tail water to precipitate through a flocculant in a sedimentation tank, and absorbing and utilizing nutritivesalt in the water through aquatic plant, degrading the precipitated culture tail water through aeration, degrading pollutant in the water mainly through a biological agent, ensuring that pollutant ina filter dam can be blocked by fine sand and floating dregs can be removed, and filtered culture tail water finally passes a biological purification tank and is purified again through plant and biological action, and finally discharging the tail water to the culture pond and external river channels separately according to different standards. The method has the advantages that the culture tail water can be effectively circularly utilized, polluted tail water is filtered successively and enters culture finally after meeting standards, recycled culture waste is effectively utilized for the biological and plant growth, and ecological culture circulation is performed.

Description

technical field [0001] The invention relates to aquaculture, in particular to a waste recovery and tail water treatment method for concentrated fish culture in a water tank. Background technique [0002] As the world's population continues to grow, water resources can quickly become a major limiting factor for many industries. The stability of water quality in the process of aquaculture is the basic prerequisite for maintaining the quality and output of aquatic products. Traditional freshwater pond culture mainly maintains water quality by increasing oxygen and changing water. Not only has it brought serious water pollution to the environment, resulting in frequent occurrence of aquatic product diseases, but also by increasing the frequency of water changes, it is easy to cause excessive fluctuations in water quality in the pond, causing stress reactions in cultured animals. Therefore, how to reduce the tail water discharge in the freshwater pond culture process is a key is...

AI Technical Summary

Problems solved by technology

The stability of water quality in the process of aquaculture is the basic prerequisite for maintaining the quality and output of aquatic products. Traditional freshwater pond culture mainly maintains water quality by increasing oxygen and changing water. Not only has it brought serious water pollution to the environment, resulting in frequent occurrence of aquatic product diseases, but also by increasing the frequency of water changes, it is easy to cause excessive fluctuations in water quality in the pond, causing stress reactions in cultured animals

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