1. An overview of the system

Factory circulating aquaculture system is a new aquaculture mode of purifying aquaculture water and recycling it through water treatment equipment.

The factory circulating aquaculture system integrates the knowledge of biology, engineering, fluid mechanics, environmental engineering, informatics and other disciplines. It is a multi-disciplinary system with strong technical content. Factory circulating aquaculture system is industrial means to actively control the water environment, water consumption, covers an area of less, less pollution to the environment, product quality safety, disease, high density, aquaculture production is not restricted by geographical or climate and influence, high resource utilization rate, is high input and high yield, low risk important way to realize the sustainable development of aquaculture. It has important practical and historical significance to the reform of aquaculture mode and environmental protection.

Guangzhou AVIC comprehensive the above actual situation, Combined with the characteristics of the factory recirculating aquaculture system, Research and develop energy conservation and environmental protection, Small land footprint, High land-use efficiency, Can effectively isolate the disease and control the invasion of the disease sources, Factory aquaculture system to reduce the incidence and incidence of fish fry; In areas where there are more natural disasters from typhoons, Factory recycled aquaculture can effectively resist the devastating blow of natural disasters on the aquaculture industry, The main equipment of the system is: automatic microfilter, biological maintenance system, rotating sedimentation tank, protein separator, ozone machine, residual ozone remover, composite deoxygenation sterilization processor, pure oxygen system, thermostat, on-line water quality monitoring, automatic feeding machine, etc.

2. System process flow

Description of Guangzhou AVIC factory circulating aquaculture system: the residual feed and harmful substances such as feces in the aquaculture pool are discharged in time, and should be disposed of before being converted into ammonia nitrogen and nitrite, so as to reduce the pollution source of water quality in the first time. The rotating sedimentation tank and the automatic microfilter play a very key role here. If the microfilter is not stable and the filtration is not clean enough, it will directly affect the overall water quality and increase the burden of the equipment behind. But some feed and feces have been dissolved in water can not be filtered by the microfilter, enough protein separator to separate, at the same time, the effect is better. However, due to the strong disinfection ability of ozone, in order to avoid the water after ozone treatment directly flowing to the aquaculture pool, but also want to use water immediately, we must increase the residual ozone remover. Then it flows to the biological maintenance system to cultivate beneficial bacteria and form a biological chain. After frequent biological treatment, it also needs to flow to the composite deoxygenation sterilization processor, which is a very easy to ignore the equipment, the main function is to remove carbon dioxide and other harmful gases and ultraviolet sterilization. Then adjust the water temperature, detect the water quality parameters and then flow back to the aquaculture, but also need pure oxygen oxygen system to add oxygen.

3. Features of the system

Factory circulating aquaculture system is to achieve controllable, high density, low cost, environmental protection, healthy aquatic products and many other conditions, the operation cost is very cost, the equipment input cost is a little more acceptable, because it is an investment, energy saving, low cost is the key. So must achieve automation, reduce labor, bottom error. Guangzhou AVIC factory recycling aquaculture system to achieve one key control; automatic start, automatic stop, automatic water replenishment, automatic sewage, automatic oxygen, automatic control of water temperature, real-time online monitoring (support mobile phone view), abnormal water quality WeChat alarm to inform the relevant responsible person, there are automatic feeding machine optional. Among them, the control of dissolved oxygen is very important, especially for users of high-density breeding, the water quality can be barely cope with a day without treatment, but an hour without oxygen may cause irreparable losses to users, automatic oxygen is a very important, must be automatically oxygen, to minimize the mistakes.

4. Operating principle of the main equipment of the system

1. ZH-PM fully automatic drum microfilter system

ZH.PM series automatic boxtype drum microfilter is mainly composed of four parts: box assembly, drum assembly, reverse cleaning system and electric control box system, which is made of non-toxic seawater corrosion resistant high-quality engineering plastic materials. A 200 mesh ~400 stainless steel filter screen was used to separate the suspended matter in the water, and the stainless steel filter screen was used as the medium to remove the suspended matter. When the water containing suspended particles particles enters the drum, the suspended particles are trapped by the stainless steel filter screen, and the water without suspended particles enters the reservoir after filtration. When the suspended water in the drum accumulates to a certain amount, the water flow of the filter will decrease, with the result; when the water level in the drum rises to the set high water level. When the filter is cleaned, the water permeability of the drum filter rises, and the water level in the drum drops. When the water level drops to the set low water level, the reverse cleaning pump and the drum motor will automatically stop working, and the microfilter will enter a new round of working cycle.

2. The ZH-NPS protein separator, and no

NPS series protein separator is the latest product developed by our company, fault-free maintenance-free design, cancel the traditional protein separator jet and jet pump, product zero energy consumption, energy saving and environmental protection.

NPS series protein separator invention structure is unique, the PEI potential energy intake patent technology and N water multiple mixture cutting technology, produce a large number of tiny bubbles, the bubble surface tension, adsorption mixed in the water of various granular dirt and soluble organic matter, through the principle of airborne aquaculture sewage suspended gel, cellulose, protein, bait and feces and other organic matter. The air flow regulating valve and the working liquid level regulating valve are configured to make the protein separator produce the best effect in different working states.

Protein separator is used with ozone, can be used as ozone reactor, ozone can quickly decompose water organic matter and reducing organic matter, kill viruses and bacteria in water, ozone can not only quickly reduce the COD and BOD value in water, also can reduce the ammonia nitrogen and nitrite concentration in water, deodorization and flavor, color, iron, manganese and heavy metals and algae, increase dissolved oxygen, and has the advantages of no secondary pollution.

3. The ZH-SBF biofiltration system

SBF series fluidized biological filter is the latest product of our company, it uses solid fluidized technology and small particles with the principle and characteristics of huge surface area, concentrated the advantages of drip filter and activated sludge method, biofilm highly concentrated, high concentration, high purification efficiency, the conversion rate of ammonia nitrogen can be increased by 2~4 times. Compared with the ordinary biological filter, biological drum, biological turntable and activated sludge used in the past, it has the advantages of small footprint, not easy to block or good biofilm activity. By improving the efficiency of water purification, the construction costs and floor area can be reduced, and