In the case of the gravity based operation variant, the dirt polluted pond water is directed via one (HF50S) or two inlet pipes (HF100S) with the help of the principle of gravity into the pre-chamber, where optional UV clarification can take place.
The water calms down here and flows laminar through the oval milled-out portion into the filter chamber. The dirt particles settle on the belt filter and form the so-called filter cake. This is used as an additional fine filter. The filter cake grows in size in the course of the filtration, whereby the water level in the filter chamber rises and actuates the contact pins.
The control in the switch cabinet sets the rinsing pump and the drive motor with the belt filter in motion. The dirt particles are rinsed out of the sieve into the dirt drain pan and discharged into the sewer system.
The mechanically purified water trickles down into the underlying bio-chamber and is thereby concomitantly enriched with oxygen.
The biological treatment of the water takes place in the bio-chamber, which is filled with bio-medium. The purified water is sucked up from the perforated sheet cage, which is mounted under the pre-chamber, by the return pump and led into the pond.
The two gravity based operation models are each available for delivery with cornered and round bio-chambers: HF50SEB, HF50SRB, HF100SEB, HF100SRB