Apparatus for removing fine particles and dissolved pollutants in culture water body and method of apparatus

Abstract

The invention discloses apparatus for removing fine particles and dissolved pollutants in a culture water body and method of the apparatus. The apparatus comprises a booster pump, a high-pressure tankbody and an air flotation barrel; the booster pump is provided with a clear-water suction inlet and an air suction inlet, and an outlet of the booster pump communicates with a bottom inlet of the high-pressure tank body; an outlet of the high-pressure tank body is connected with a pressure release device, and the outlet end of the pressure release device communicates with a water inlet pipeline of the air flotation barrel; the top of the air flotation barrel is connected with a bubble collector; the bubble collector is provided with a sewage discharging pipe; and the upper part of the air flotation barrel is provided with a water discharging pipe. The using method of the apparatus concretely comprises the following steps: the culture water body and air form a gas-water mixture under the action of the booster pump, the mixture flows into the high-pressure tank body, the air is largely dissolved into the water body under the action of high pressure, water is injected into the water inlet pipe of the air flotation barrel through the pressure release device, micro bubbles are released in a low-pressure environment, the micro bubbles adsorb the fine particles and the dissolved pollutants and enter the bubble collector, and therefore the purpose of water treatment is achieved. The apparatus and method disclosed by the invention have the advantages of low energy consumption, a largeyield and uniform distribution of the micro bubbles, and high removing efficiency of suspended particles and proteins.

Description

technical field [0001] The invention relates to the field of industrial circulating aquaculture water body treatment, in particular to a device and method for removing fine particles and soluble pollutants in the aquaculture water body. Background technique [0002] At present, the industrial recirculating aquaculture treatment system usually includes multi-stage treatment units, but reduction is the core principle of water treatment system design, that is, the residual bait and feces produced in the aquaculture process are removed through various technologies such as rapid sewage discharge and solid-liquid separation. Particulate matter discharge system, reducing pollutant treatment load. According to different treatment objects, the reduction treatment units can be divided into the following two categories. The first category is to remove sedimentable particles such as residual bait and feces. This type of treatment unit has a simple structure and operating conditions but ...

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Problems solved by technology

[0003] The microfiltration machine uses physical filtration to remove suspended particles, with high removal efficiency and stability, but it is not suitable for fine particles (<35μm). The aquaculture industry usually uses protein separators to remove fine particles and some proteins. The structure and operation of protein separators are simple and reliable , and the effect is relatively stable, easy to maintain

But also there are following deficiencies in actual effect and application: (1) the air bubble particle size that various methods produce in existing protein skimmer is bigger and distributes unevenly, and fine particle and protein removal efficiency are not high, and supporting multiple Jet pump, high energy consumption; (2) In the freshwater aquaculture system, the bubbles produced by the low viscosity of freshwater are large and small, and have poor adsorption capacity for particulate matter and protein, and the protein separator has almost no effect in freshwater aquaculture; (3) Seawater Ozone dosing in the protein skimmer in farming is often not fully utilized due to uneven mixing and there is a problem of ozone residue

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