Purification and circulation system and method for aquaculture wastewater

Abstract

The invention discloses a purification and circulation system for aquaculture wastewater. The system comprises a culture pond, and sequentially comprises a filter tank, an adjusting pond, a primary filter pond, a biochemical reaction pond, a biological reaction pond, a biological filter pond and a disinfection pond along the water flow direction; the filter tank is arranged in the adjusting pond, is positioned at the top of the adjusting pond, and is communicated with the culture pond, so that aquaculture wastewater in the culture pond can conveniently flow through the filter tank and then flow into the adjusting pond; the bottom of the adjusting pond is communicated with the bottom of the primary filter pond, water in the primary filter pond overflows into the biochemical reaction pond, the bottom of the biochemical reaction pond is communicated with the bottom of the biological reaction pond, water in the biological reaction pond overflows into the biological filter pond, and the bottom of the biological filter pond is communicated with the bottom of the disinfection pond, so that the disinfected water is discharged into into the aquaculture pond. The system can efficiently remove ammonia nitrogen in aquaculture wastewater, and meanwhile, the system is simple to operate, high in operability and low in operation cost.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and in particular relates to a recycling system and method for purifying aquaculture wastewater. Background technique [0002] Good water quality is a necessary condition for the survival and growth of aquatic products. In order to provide aquatic products with water that meets the requirements, my country's aquaculture currently adopts the method of large-scale introduction and large-scale drainage, which consumes a lot of water resources and produces a lot of aquaculture wastewater. Aquaculture wastewater is directly discharged into the environment, which can easily cause environmental pollution. Connecting to the municipal pipe network system not only requires a large amount of capital investment in the early stage, but also brings load to municipal sewage treatment. [0003] In recent years, people have begun to study the circulating water aquaculture system, and the circulating water aqua...

AI Technical Summary

Problems solved by technology

However, the disadvantages of the existing circulating water aquaculture system are: the required investment and system operation cost are high, the treatment effect of ammonia nitrogen and nitrite in the aquaculture wastewater is not good, the system operation is complicated, and the operability is not strong. The system is greatly restricted in the promotion and application

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