Integrated treatment and purification system and method for industrial mariculture wastewater

Abstract

The invention belongs to the technical field of mariculture and particularly relates to an integrated treatment and purification system and method for industrial mariculture wastewater. The system comprises a mechanical filter tank, a bio-packing filter tank, an engineering algae culture tank, a seawater plant purification tank, an ozone sterilization and disinfection tank, a drainage monitoring system and a central control system, wherein large particle matter in a water body is removed by the mechanical filter tank into an outdoor solid waste squeezing tank; in the bio-packing filter tank, dissolved ammonia nitrogen, nitrite nitrogen, nitrate, organic matter and the like in the water body are removed, tiny suspended substances in the water body are filtered, and sludge is discharged intothe outdoor solid waste squeezing tank; dissolved nitrogen and phosphorus nutrients in the water body are removed and tiny suspended solids are adsorbed by engineering algae and seawater plants respectively in the engineering algae culture tank and the seawater plant purification tank; COD and oxidized nutrients are reduced, water color is removed and microorganisms in the water body are killed by ozone in the ozone sterilization and disinfection tank; the drainage monitoring system is used for detecting effluent quality of the system; the central control system is used for controlling the tanks in real time according to the drainage monitoring system. The integrated treatment and purification system is high in automation degree and controllability, smaller in occupied area and large in culture wastewater treatment amount per unit time.

Description

technical field [0001] The invention belongs to the technical field of mariculture, in particular to an integrated treatment and purification system and method for industrial mariculture wastewater. Background technique [0002] China is a big country in aquaculture, and its aquaculture production ranks first in the world. According to the 2017 China Fishery Statistical Yearbook, my country's marine aquaculture production in 2016 was 19.6313 million tons, accounting for 56.25% of the marine product output. [0003] In the past two decades, land-based seawater factory farming, especially the recirculating aquaculture model, can achieve high-density farming of aquatic organisms such as fish and shrimp by optimizing the aquaculture water environment. At the same time, the aquaculture wastewater mixed with a large amount of residual bait, aquatic animal manure, input leached matter and metabolites is directly discharged into the environment or after simple treatment, which will...

AI Technical Summary

Problems solved by technology

At present, in actual production, mariculture wastewater is generally discharged directly into the sea after simple primary sedimentation, and it is difficult to meet the requirements of relevant laws and regulations on the quality indicators of discharged water.

[0005] At present, there are existing devices and methods for aquaculture wastewater treatment, mainly for freshwater aquaculture wastewater, which are treated through primary precipitation and freshwater plant absorption; while for related designs for seawater aquaculture wastewater, the treatment cycle is relatively long, and the effect is limited. Disadvantages such as large area, small controllability, and limited amount of water treated per unit time

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