BIOFILTER RAISED FLOORING SYSTEM
High-quality exhaust air cleaning
Our biofilter raised flooring system made from hanit recycling plastic have been specially developed for use in bio-filter systems. As a ventilation and inflow floor, our system solution provides a long-lasting and cost-effective alternative to conventional models made from wood, steel or concrete, since these materials cannot withstand the long-term effects of the warm and moist micro-climate and the strong chemical loads in bio-filters. Damage caused by decomposition or corrosion is inevitable, meaning that efficient air circulation and environmentally friendly exhaust air cleaning can only be ensured if regular maintenance work is carried out. And sooner or later, the floor will also have to be replaced if conventional materials are used.
Our biofilter raised flooring system hanit made from recycling plastic performs significantly better under extreme conditions in bio-filters because the robust material is resistant to chemicals, acids and micro-organisms. hanit also permanently withstands a prevailing temperature of 50 °C and humidity of almost 100%. The robust recycling plastic can also cope with high mechanical loads, meaning that our biofilter raised flooring system can be driven over with vehicles with a gross weight of up to 3 tonnes with appropriate installation. Our hanit biofilter raised flooring system, therefore, guarantees a high degree of circulation capability and reliable and maintenance-free use over a long period, and is already successfully being used in many areas such as in composting systems, sewage treatment plants and in the food and animal feed industry.
RESISTANT TO
UV RAYS
hanit easily withstands UV radiation and all-weather conditions and is ideal for year-round outdoor use
RESISTANT TO
MICROORGANISMS
Resistant to mould, fungi, bacteria and viruses, hanit products deliver long-term performance and reliability
RESISTANT TO
CHEMICALS
Resistant to most oils, alkalis and acids – hanit can be used in environments with chemical exposure or in industrial settings
BREAK-RESISTANT
Extremely resilient and break-resistant, hanit is perfect for applications with high safety and stability requirements
HYDROPHOBIC
Thanks to their water-repellent properties, hanit products remain reliable in use, even when in constant contact with moisture
MATERIAL DENSITY
Thanks to a density of approx. 0.93 g/cm³, hanit recycled products are easy to handle during transport and installation
HIGH PRESSURE
RESISTANCE
Thanks to its high load-bearing capacity and strength, hanit recycled plastic resists mechanical stress, deformation and breakage
CONTINUOUS OPERATING
TEMPERATURE
hanit offers reliable performance across a wide temperature range, withstanding continuous exposure from -20 to 50 °C
FIRE PROTECTION
CLASSIFICATION
hanit recycled plastic is classified as building material class B2 in accordance with DIN 4102 and is assigned fire behaviour class E
BIOFILTER RAISED FLOORING SYSTEM
The chemical-resistant solution
The hanit biofilter raised flooring system is comparatively quick and easy to install. The gratings are simply fitted to the top of the supports, and the light weight of the components also makes installation easier. If required, the biofilter raised flooring system can be flexibly adapted to the on-site situation without problems, since hanit can be processed using normal commercial tools in a similar way to wood. For example, the height of the supports can be adapted to the depth of the floor tray, and all conceivable filter dimensions and shapes can be realised – even round filters are easy to implement.
Our Technical products can be flexibly adapted to customer-specific requirements. Just talk to us – we’ll find the right solution together.
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REFERENCE PROJECT BIOFILTER RAISED FLOORING SYSTEM
Sewage treatment plant east in Melbourne, Australia
Melbourne Water is a state-run authority which monitors and manages the majority of the bodies of water and water supplies in Melbourne, Australia. These include reservoirs, lakes, wetland areas, rivers and the city's sewage and drainage systems. Sewage treatment plant East is located in the suburbs in the south-east of the city and uses innovative processes for converting wastewater into class A recycled water. Approximately 330 million litres of sewage is treated every day in the plant, which represents almost half of the city’s sewage. The bio-filter is the primary odour control system in the plant and treats 248,000 m3 per hour. The flow is divided among 5 bio-filters, each with 6 cells with a media bed depth of 13.5 x 9.5 x 1.2 m.
The bio-filter had to be replaced in 2017 because of extreme wear. As part of a tender, Bioaction, a specialised service provider for wastewater customers in the area of odour prevention and corrosion reduction, was granted the order for redevelopment. Shortly afterwards the company approached us to discuss the possibility of using hanit recycling plastic and involving HAHN Plastics in the project as a technically experienced partner. In addition to a significant amount of wear, other problems were also discovered during the initial assessment on-site. It quickly became clear that the original construction had several deficits, including a significantly elevated bio-filter floor. Another challenge was the fulfilment of the environmental regulations, which could only be achieved with optimum bio-filter performance. For this reason, Melbourne Water considered extending the system by constructing a new 6-cell bio-filter to increase its capacity.
During the planning phase, Bioaction carried out CFD modelling (Computational Fluid Dynamics) to simulate the use of hanit recycling plastic and the associated advantages thereof. The model showed that a floor structure with hanit would increase the effective surfaces of the media bed and would therefore lead to more even air distribution through the filter media. Following the successful implementation of the project, the hanit floor structure proved to have another significant advantage. The capacity of the bio-filter could be increased by 20% by using separate support feet with different heights. This meant that the originally planned extension of the system was no longer needed, which saved customer Melbourne Water a considerable amount of money. The project was completed in June 2017. Overall, the project was able to be implemented to the customer’s complete satisfaction, not only from a timing point of view, but also because of the quick and easy installation, and also financially thanks to the capacity increase.
TECHNICAL DATA
Standard dimensions - special dimensions on request
| Sheet |
| Width: 500 mm |
| Length: 1,000 mm |
| Height: 80 mm |
| Weight: 15.7 kg |
| Supports |
| Diameter: 150 mm |
| Length: 300 - 1,000 mm |
| Weight: 2.7 - 9.5 kg |
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