Basic Parameters of Paddlewheel Aerators and Key Points for Farmers When Choosing a Model
In aquaculture, dissolved oxygen is yield, and farmers also call the aerator the "life-saving machine." The paddlewheel aerator is one of the most widely used models in intensive pond culture. It relies on rotating paddlewheels to stir the water body, drawing air into the water while bringing oxygen-poor bottom water up to the surface for aeration. It combines three major functions: aeration, water stirring, and gas exchange. Many people see model numbers like "ZY3G type" and a string of parameters when buying, but do not know what each parameter represents or how to compare them. Today we will explain the basic parameters clearly.
What the basic parameters represent
When looking at a paddlewheel aerator, the main items to check are these: first, the matched power, which refers to the motor power and directly determines aeration capacity and power consumption; second, the paddlewheel diameter and rotational speed. The larger the paddlewheel and the better matched the speed, the wider the stirring range and the larger the splashing and waves produced; third, aeration capacity, generally marked as how many kilograms of oxygen are added per hour, which is the core indicator for measuring performance; fourth, power efficiency, that is, how much oxygen is added per kilowatt-hour of electricity. The higher the value, the more electricity is saved; fifth, the loading water surface area, which refers to the range of pond area suitable for a single unit. In addition, there are power supply voltage, overall machine weight, noise, and so on. When purchasing, the nameplate on the machine body and the instructions shall prevail.
How to choose a model based on parameters
Model selection should be combined with the conditions of your own pond. For intensive ponds with a relatively large water surface and high stocking density, the installed power per unit area must be sufficient; for small water surfaces with high-density culture, even more margin should be left. For the same large pond, rather than equipping one high-power machine, it is better to arrange several machines in suitable positions according to area so that dissolved oxygen throughout the pond is more uniform. When purchasing, also pay attention to workmanship details such as the motor protection rating and wire diameter, float material, and quality of the gearbox. Try to choose products from regular manufacturers with after-sales support, and do not buy only for cheapness.
Key points for use and maintenance
Turning the machine on depends on "watching the sky and watching the water": on sunny days, turn it on at noon to stir the water and store oxygen; on cloudy days, turn it on in the early morning; during continuous rainy weather, turn it on in advance at midnight or before dawn; if fish and shrimp are found gasping at the surface, turn it on immediately until the gasping is relieved. Usually check whether the paddlewheel is deformed or tangled with debris, and clean floating objects on the water surface in time; regularly check the gearbox lubricating oil, motor insulation, and wiring, especially underwater cable connectors, to prevent electric leakage; after long-term shutdown, before restarting, first run it idle for inspection before putting it into the water. For safe electricity use, it is recommended to install a leakage protection device.
Finally, one reminder: paddlewheel aerators and other aquaculture machinery have been included in the scope of agricultural machinery purchase subsidies in many regions. Subsidy standards and application procedures differ from place to place. Before buying, you can consult the local agricultural machinery competent department, and the published policy shall prevail.