Three-stage filtration system for breeding tail water

Abstract

The invention discloses a three-stage filtration system for breeding tail water. The system comprises a filtration chamber, and the interior of the filtration chamber is uniformly provided with filterscreens; a processing chamber is arranged on one side of the filtration chamber, and the interior of the processing chamber is provided with a first rotating shaft; a gas-liquid mixer is connected with the outer side of the processing chamber, and the outer side of the gas-liquid mixer is connected with an ozone tank through a ventilation pipe; and the outer side of the ozone tank is provided with an exposure tank. According to the system provided by the invention, the filtration chamber, the processing chamber and the exposure tank are arranged, the filtration chamber is used to physically filter the breeding tail water through the filter screens to remove a large amount of impurities and dirt doped in the tail water, the filtered tail water is conveyed to the processing chamber througha first water pump, in the processing chamber, ozone is conveyed by the ozone tank to be blended with the tail water to remove a plurality of reducing pollutants in the tail water, then the processedtail water is conveyed to the exposure tank through a second water pump, and an antibacterial wetland and aquatic plants in the exposure tank are used to purify nutrient elements such as nitrogen andphosphorus in the tail water.

Description

technical field [0001] The invention relates to a tail water treatment system, in particular to a three-stage filter system for aquaculture tail water. Background technique [0002] In recent years, with the rapid development of high-density artificial aquaculture and the aggravation of aquaculture environmental pollution, the degree of pollution of aquaculture water far exceeds the purification capacity of the water itself. Pollutants formed by residual feed and fish excrement in the process of artificial aquaculture cause water body self-pollution and even water quality deterioration, manifested as: severe eutrophication of water body, increase of suspended solids in water body, biological oxygen demand, chemical oxygen demand , nitrite nitrogen, etc. content increased, dissolved oxygen decreased. [0003] The traditional aquaculture wastewater treatment method is to discharge the aquaculture water and inject it into a fresh water body; this kind of aquaculture wastewater...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a three-stage filtration system for aquaculture tail water. By providing a filter chamber, a treatment chamber and an exposure pool, the filter chamber physically filters the aquaculture tail water through a filter screen to remove impurities in the tail water. A large amount of sundries and dirt, the filtered tail water is transferred to the treatment chamber through the first water pump, and the ozone tank is used to transfer ozone and tail water to blend in the treatment chamber to remove various reducing pollutants in the tail water, and then pass through the second The water pump transfers the treated tail water to the exposure pool, and the sterilized wetland and aquatic plants in the exposure pool purify the nitrogen, phosphorus and other nutrients in the tail water. After three stages of treatment, the tail water can achieve an obvious purification effect , the tail water after treatment can be reused, which will not cause pollution and save a lot of water resources, so as to solve the problem that the current aquaculture wastewater treatment method is easy to cause water pollution, and the light ones have adverse effects on the growth, development and reproduction of aquatic economic animals. impact; in severe cases, it will destroy the micro-environmental ecosystem of the water body

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