The floor of a biofilter has to meet some stringent requirements. It should provide an excellent drainage with a stream of air with a very high humidity. In addition, the floor has to be loaded with a heavy biofilter medium and it should not be allowed to warp, bend or collapse. The UK company Hahn Plastic Ltd. has developed Hanit®, a new set of plastic grills and legs made of recycled material that is able to stand a biofilter media in extremely harsh conditions.
The traditional option when designing a biofilter floor is using a pre-cast concrete grill. This is often a very convenient way of flooring a a biofilter. The pre-cast concrete structures are resistant, durable under normal conditions and can be easily dismantled, when required.
However transport and handling charges are often a handicap for pre-cast concrete grills. In addition, this flooring has some problems when the air flow has a very high H2S concentration. Concrete gets corroded in these cases and a replacement of the floor has to be made, sometimes after a few years.
The UK company Hahn Plastics ltd, which is part of the Hahn Group, Europe's leader in the development and manufacture of outdoor, technical 100% recycled plastic products, has developed the biofilter raised flooring system Hanit® . Using state of the art technology and moulding tools, along with technical expertise, they have developed an innovative, long-lasting and cost effective floor that is resistant to chemicals, acids and micro-organisms.
Hanit® has a large airflow surface and it is adaptable to every filter shape. In addition, the flooring is accessible by vehicles up to 3T gross weight (depending on installation).
Contact the North American representative here.