Hypoxia and fish floating heads often occur in high-yield ponds, and aerators have become one of the commonly used equipment for high-yield pond culture. However, improper use not only fails to achieve the oxygenation effect, but also increases the production cost due to the large power consumption. What should be the best way to use aerator?
1 Correct selection of type and installation of aerator
position
1.1 A wide range of aerators are commonly used, including impeller aerators, waterwheel aerators, jet aerators, and inflatable aerators. However, impeller aerators are commonly used in pond fish farming. This type of aircraft operates in fish ponds and it has three major functions of increasing oxygen, mixing water, and detoxifying toxic gases, and its oxygenation effect is mainly formed by causing water jumps, liquid surface renewal, and negative pressure air intake, which is obviously better than others. Type of aerator.
1.2 The aerator should be placed in the center of the working surface or slightly upwind. The rope wire is fastened or anchored, and the plunger is fixed so as not to move around during operation and wind the wire.
1.3 The working water depth of the aerator must exceed 2 times the diameter of the impeller so as to avoid impeding the impeller work and raising the sludge and worsening the water quality.
2 Reasonably determine the start and operation of aerator
time
2.1 After a large number of organic fertilizers are applied, the peak value of dissolved oxygen in ponds will drop, and the method of starting with a combination of sunny noon and early morning may be adopted to improve the dissolved oxygen status of ponds.
2.2 According to the mutual constraints between the various factors in the pond ecosystem and the production practice experience, the most appropriate start-up and operation time can be taken: open at noon on sunny days, open in the early morning on cloudy days, open in the middle of rainy nights, and open in the evening, floating heads. Early in the morning, the main growing season of fishes is kept open every day; the boot time is long in the middle of the night and the boot time is short at noon; after fertilization, when the weather is hot, the water is large or the fish is well-kept, the boot time is long; no fertilization, cool weather, small water surface or When fish is thin, boot time is short. In short, according to the specific circumstances, flexibility.
2.3 During the main growing season of fish, special attention should be paid to the thunderstorms in the evening. Atmospheric pressure is low and there is no wind in the atmosphere. It should be considered that early start-up is to prevent “pan-tang†accidents.
3 Correct use and maintenance of aerator
3.1 The load surface of aerators depends on kinetic energy. The oxygen aeration efficiency of the impeller aerator is up to 2kg/kWh. Each kW power can meet an oxygen demand of 2668m2 (500kg of fish per 667m2) in an average pond. With a small load area, the oxygenation effect is fast.
3.2 The aerator starting voltage is in the range of 312 to 390V. A three-phase four-wire cable is used. Under the motor's wiring nut, a pad washer should be added to prevent vibration from escaping the line to ensure safety.
3.3 The continuous operation time of the oxygen generator should not exceed 12 hours. Attention should always be paid to the presence of abnormal noise and abnormal impact or vibration. Pay attention to the buoyancy of the motor and observation buoy to prevent water leakage.
3.4 Every winter, the whole machine shall be rusted and repainted and maintained once. At ordinary times, care should be taken to remove the moss particles on the impeller and the blowhole to ensure that the design parameters of the impeller remain unchanged, and the best working condition is always maintained.
Handrails play a very important role in the aging of the family. Through a small handrail, create a safe and secure living environment for the elderly at home. When installing the handrail, pay attention to determine the installation height of the handrail according to the height of the elderly at home. The armrest is located at the crotch of the elderly. Generally speaking, it is about 80 to 85 cm from the ground. In order to provide safe and effective support for the elderly, different products need to be selected according to different installation conditions. Some families want to install handrails on non-load-bearing walls. We suggest that they install lining plates first, and then install handrails on the lining plates.
When selecting the material of the handrail, pay attention to the coordination with the furniture environment, create a warm atmosphere, avoid making it cold and hard, and do not give the elderly the illusion of "being a patient". For example, the wooden handrail in the video looks very warm and feels good. It is suitable for the elderly.
TRUTECH CO., LTD. is an enterprise specializing in the research, development, production and sales of professional OTC products.The main products include shower chairs, armrests, toilet racks and toilet armrests, bedside armrests, elderly chairs and sofas, crutches and walking aids, knee pads, waist supports and other equipment.
Grab Bar,Bathroom Grab Bars,Grab Bars For Shower,Shower Safety Bars
TRUTECH CO., LTD. , https://www.trutechealth.com