Method for regulating and controlling water quality of fully enclosed circulation sea-water industrial mariculture

Abstract

The invention discloses a method for regulating and controlling the water quality of fully enclosed circulation sea-water industrial mariculture, comprising the following steps: (1) purifying water source of seawater through a sedimentation basin, regulating salinity and temperature, then supplying water to a culture pond; (2) letting the culture waste water discharged from the culture pond flow into a water collecting tank through a sewage tank, and putting the culture waste water to a filter unit for mechanical filtering; (3) dynamically lifting water to high position for sand filtration; (4) carrying out biological treatment in a biological filter which is filled with brushes as biological carriers; and (5) carrying out sterilization with vitalight lamp radiation, and then returning to the culture pond for recycling. The results of trial culture with the invention show that: the removal rates of three nitrogens of the processed water are all exceed 70 %, the removal rate of NO3<->-N exceeds 80 %; the bacterial index is reduced by 85.05 %, DO is increased to a certain extent, and the pH value is increased slightly; the indexes of water quality after treatment achieve the water standards of mariculture, simultaneously, culture output is increased, and the hydroenergy and electric energy are saved.

Description

technical field [0001] The invention relates to a water quality control method for industrialized aquaculture, which belongs to the technical field of aquaculture. Background technique [0002] The fully enclosed circulating seawater factory culture is based on the original factory culture, equipped with circulating water purification facilities and equipment, using physical, chemical, biological and other purification methods to transform the breeding wastewater into reusable breeding water, using high-quality artificial A highly intensive farming method with feed and management techniques. The existing aquaculture technology adopts open flowing water or semi-flowing water aquaculture, the water quality is easy to treat, and the bait is mainly low-quality miscellaneous fish and miscellaneous shrimp. The waste of fishery resources is serious, the cost of aquaculture is high, and it is very easy to be restricted by the external marine environment. The discharged sewage will ...

AI Technical Summary

Problems solved by technology

The existing aquaculture technology adopts open flowing water or semi-flowing water aquaculture, the water quality is easy to treat, and the bait is mainly low-quality miscellaneous fish and miscellaneous shrimp. The waste of fishery resources is serious, the cost of aquaculture is high, and it is very easy to be restricted by the external marine environment. The discharged sewage will pollute the coastal waters, cause seawater eutrophication, destroy the marine ecological environment, and seriously affect the sustainable development of the marine ecological environment.

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