BIOFILTER RAISED FLOORING SYSTEM
High-quality exhaust air cleaning
Our raised flooring system, made from hanit recycled plastic has been specially developed for use in biofilter systems. As a ventilation and inflow floor, our solution provides a long-lasting and cost-effective alternative to conventional models made from wood, steel, or concrete. Those materials cannot withstand the long-term effects of the warm and humid micro-climate and the strong chemicals found in biofilters. Damage cause 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. Sooner or later, the floor will also have to be replaced if conventional materials are used.
hanit recycled plastic performs significantly better in the extreme conditions of biofilters because our robust material is resistant to chemicals, acids, and micro-organisms. hanit also permanently withstands a prevailing operating temperature of 50° C (122° F) and 100 % humidity. The robust recycled plastic can also cope with high mechanical loads, meaning that with the appropriate installation, our floors can be driven over by vehicles of up to 3 tonnes. Our hanit raised flooring system guarantees excellent air flow, capability, and reliable and maintenance-free use over a long period. It is being used for odour control in many different industries such as composting, sewage and wastewater treatment, 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
USE TEMPERATURE
hanit offers reliable performance over a wide temperature range and can withstand temperatures from -20 to 50 °C continuously
FIRE PROTECTION
CLASSIFICATION
hanit recycled plastic belongs to building material class B2 according to DIN 4102 and is assigned fire behaviour class E
BIOFILTER RAISED FLOORING SYSTEM
The chemical-resistant solution
The hanit flooring system is quick and easy to install. The grating is simply fitted to the top of the supports, without any need for fasteners. The light weight of the components makes installation easy to perform manually. If required, the system can be flexibly adapted to the on-site situation without issue, 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 slope of a concrete floor, and all conceivable filter dimensions and shapes can be achieved – 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. Wastewater 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 biofilter is the primary odour control system in the plant and treats 8,758,037 ft3 per hour. The flow is divided among 5 biofilters, each with 6 cells with a media bed depth of 44.29 × 31.17 × 3.94 ft.
The biofilter had to be replaced in 2017 because of extreme wear. As part of a tender, Bioaction, a specialized service provider for wastewater customers in the area of odour prevention was granted the order for redevelopment. Shortly afterwards, the company approached us to discuss the possibility of using hanit recycled 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 biofilter floor. Another challenge was the fulfilment of the environmental regulations, which could only be achieved with optimum biofilter performance. For this reason, Melbourne Water considered extending the system by constructing a new 6-cell biofilter in order to increase the capacity.
During the planning phase, Bioaction carried out CFD modelling (Computational Fluid Dynamics) to simulate the use of hanit raised flooring system 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 successful implementation of the project, the hanit floor proved to have another significant advantage. The capacity of the biofilter could be increased by 20% by using separate supports 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 successfully 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 financially, thanks to the capacity increase.
TECHNICAL DATA
Standard dimensions - special dimensions on request
| Grating |
| Width: 19 ⅝" |
| Length: 39 ⅜" |
| Height: 3 ⅛" |
| Weight: 34.6 lbs |
| Supports |
| Diameter: 6” |
| Length: 11 ¹³∕₁₆" - 39 ⅜" |
| Weight: 6 - 20.9 lbs |
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