How can a Drum filter system help maintain clear water quality in aquaculture?

Why is it necessary to use a Drum filter machine in recirculating aquaculture systems?

In the context of recirculating aquaculture systems, the utilization of Drum filter equipment is essential. Within industrial aquaculture operations, water quality is maintained through the implementation of recirculating systems. Throughout the process of recirculating aquaculture, a significant portion of residual feed and excretions from cultured organisms exist in the form of suspended large particles within the aquaculture wastewater. The excretions and feed residues of aquatic organisms can elevate the organic content of the aquaculture water, leading to the proliferation of organic matter-digesting bacteria. This, in turn, competes for growth space, dissolved oxygen, and nutrients within the biofilm with ammonia-nitrogen converting bacteria.

Therefore, in certain designs of recirculating water systems, a preliminary filtration process is implemented using Drum filter units to capture and eliminate larger particles of pollutants, aiming to reduce the biological treatment load and prevent blockages in other equipment.

Introduction and Working Principle of Drum filter Machine:

The drum filter machine, also known as the fully automatic drum filter machine, is a rotary drum screen filtration device designed for the environmental protection of solid-liquid separation in the early stage of aquaculture, raw water, circulating water, and wastewater treatment systems. It can effectively retain fine suspended solids in water and is also suitable for applications such as raw water filtration, algae removal, and removal of planktonic organisms in tap water.

Operational principle

The operational principle of the Drum filter machine involves the use of a rotating drum for filtration, which is equipped with a dense filter mesh on its exterior. All automated functions are controlled by the external control panel on the machine casing. During operation, 2/5 of the filter mesh is submerged in water, allowing the wastewater to enter the drum axially and flow out through the sieve mesh, trapping impurities (fine suspended solids, particles, fibers, pulp, etc.) on the inner surface of the drum mesh. When the impurities trapped on the mesh are carried to the upper part of the drum, the backwash water on the outer side of the sieve mesh flushes them into the drainage tank, achieving the separation of solid and liquid phases.

When the water level drops to the position of the water level controller, the controller will transmit an electrical signal to the control center, prompting it to activate the drum motor and booster pump. The drum will gradually begin to rotate, while the high-pressure pump will discharge water from the nozzles, allowing the high-pressure water to flush away debris adhered to the screen. The debris will be collected in the sludge collection tank inside the drum, and then discharged through the drainage pipe, completing the solid-liquid separation and automatic cleaning process.

The product features of a Drum filter

The product features of a Drum filter machine include a small footprint, large filtration area, and enhanced filtering efficiency, all while saving space in the equipment room. The installation is flexible and convenient. The microporous filter screen has the characteristics of small pore size, low resistance, and strong water flow capacity, leading to improved filtration performance. The 316L stainless steel filter screen enhances corrosion resistance, resulting in a longer and more durable lifespan.

The Drum filter machine features high automation, allowing for continuous operation. The liquid level sensor automatically controls the backwashing process, leading to significant savings in manual labor costs. Its simple structure, smooth operation, low energy consumption, high efficiency, and easy maintenance have made the Drum filter machine widely favored in aquaculture water treatment. It is extensively used in aquaculture raw water treatment systems for algae and suspended solids mechanical filtration, as well as in the wastewater treatment process of aquaculture farms.