How To Build A Pollution Prevention Line To Maintain Ecological Balance Through Floating Fish Feed Production Lines

Nov 25, 2025

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The core of ecological balance in aquaculture lies in the stability of the aquatic environment. Eutrophication caused by feed pollution (uneaten feed, feces) is a major contributing factor to algal blooms and decreased dissolved oxygen. Modern aquaculture feed equipment, through technological innovation, has built a pollution control system across the entire process from feed production to feeding, becoming a "guardian" of ecological balance.

In the feed production stage, extrusion pelleting equipment improves feed utilization and reduces pollution at the source by precisely controlling raw material ratios and processing parameters. Traditional hand-mixed feed is nutritionally uneven, easily disintegrates, and has an uneaten feed rate exceeding 20%. Twin-screw extruders, through high temperature and pressure, fully gelatinize the starch in the feed, forming a dense granular structure, increasing soaking resistance to over 40 minutes, and reducing the uneaten feed rate to below 5%. For example, in a shrimp farm in Guangdong, after using feed produced by this equipment, the ammonia nitrogen content in the aquaculture water decreased from 0.8 mg/L to 0.3 mg/L, effectively preventing eutrophication. Meanwhile, the equipment can thoroughly grind and mix raw materials such as fishmeal and soybean meal, reducing the emission of undigested components in the feed and further reducing the pollution load.

In the feeding stage, the intelligent feeding equipment precisely controls the feeding amount and time to avoid pollution caused by overfeeding. Traditional manual feeding relies on experience and judgment, easily leading to problems of "overfeeding resulting in waste and underfeeding resulting in insufficient feeding." The intelligent feeding machine is equipped with infrared sensors and a water quality monitoring module, which can automatically adjust the feeding amount and frequency based on the feeding activity of aquatic animals and the dissolved oxygen content of the water. For example, when the dissolved oxygen in the water is below 5 mg/L, the equipment automatically reduces the feeding amount to prevent uneaten feed from rapidly decomposing in a low-oxygen environment. After a mandarin fish farm in Jiangsu Province introduced this equipment, the average daily feeding amount decreased by 15%, uneaten feed pollution decreased by 60%, water transparency increased from 30 cm to 60 cm, and the plankton community was restored to balance.

The pollution control advantages of the feed equipment are also reflected in its synergistic effect on wastewater treatment. Some integrated fish pellet production lines are equipped with solid-liquid separation equipment, which can pre-treat aquaculture wastewater, separate and recycle uneaten feed and feces, and produce organic fertilizer, thus realizing the resource utilization of pollutants. This "source reduction + end-of-pipe recycling" model not only reduces water pollution but also lowers aquaculture costs, creating a win-win situation for both ecology and economy. In addition, the automated control of the equipment reduces human intervention, avoids pollution problems caused by improper human operation, and further ensures the stability of ecological balance.