Why is a rotary drum filter necessary in recirculating aquaculture systems?

In factory-based aquaculture, a water treatment system is commonly used to maintain water quality. In the process of recirculating aquaculture, most of the waste water from the farming system contains excess feed remnants and fish excrement, which are mostly in the form of suspended large particles. the living environment of marine organisms such as fish, shrimp and shells can be artificially controlled, so that the farming process can be improved.

The excretion of aquatic organisms and leftover feed will increase the organic content in the culture water. Excessive organic matter can trigger the proliferation of organic matter-decomposing bacteria, which then compete with ammonia-oxidizing bacteria in the biofilm for space, dissolved oxygen, and nutrients.

The excretion of aquatic organisms and leftover feed will increase the organic content in the culture water. Excessive organic matter can trigger the proliferation of organic matter-decomposing bacteria, which then compete with ammonia-oxidizing bacteria in the biofilm for space, dissolved oxygen, and nutrients.
Therefore, in some recirculating aquaculture system designs, a rotary drum filter is used first to filter and capture larger particulate pollutants, thereby reducing the biological treatment load and preventing clogging of other equipment.

The working principle of rotary drum filter:
The breeding water in the breeding pond enters the filter screen, the residual feed and feces are intercepted by the filter screen, and the filtered clean water flows out from the water outlet. When the dirt on the filter screen accumulates to a certain amount, it will cause the water permeability of the filter screen to decrease, causing the water level to rise. When the water level rises to the set high water level, the liquid level automatic control system senses, and the backwashing pump and the motor are turned on at the same time for automatic backwashing. At this time, the high-pressure water of the back-cleaning pump is subjected to high-pressure cleaning of the transmission filter screen through the back-cleaning system of the rotary drum filter, and the suspended solids blocked on the filter screen are washed by the high-pressure water and flow into the sewage collection tank and then discharged through the sewage pipe. After cleaning the filter, the water permeability of the filter screen rises and the water level drops. When the water level drops to the set low water level, the liquid level automatic control system senses again, and the backwashing pump and motor stop working.

  Product Features of the rotary drum filter:

3. Our company's drum filter is designed for the problems that the existing filters cannot work automatically, is not resistant to corrosion, the screen is easy to break, easy to block, equipment failure rate is high, and maintenance and operation are difficult. It is one of the solid-liquid separation technologies in the early stage of water treatment in the aquaculture  system. This product purifies the water by separating the solid waste in the aquaculture water to achieve the purpose of recycling.