Aerofloat Modular DAF and Aerofloat MBBR

Aerofloat has added to its range of dissolved air flotation (DAF) wastewater treatment systems with the development of models for larger installations and for soluble contaminants, resulting in a complete offering for the food and beverage industry.

The original Aerofloat DAF was designed to be compact, odour-free and energy efficient, and due to its design, the system could not simply be made larger. In a number of projects, two or three systems were installed in parallel to increase the overall plant capacity, so company engineers set out to design a new concept to increase the capacity.

The result is the Modular Aerofloat DAF, which can treat up to 50 m³/h and beyond. The design minimises moving auxiliary componentry to keep costs low, while still ensuring the core principles are incorporated to achieve superior effluent quality.

The DAF can remove up to 98% of suspended solids and fats, oils and grease, and is an enclosed and vented system, which all but eliminates odours.

While DAFs are effective for the removal of fats, oils and grease and suspended solids, they will not remove any of the soluble contaminants. In the case of dairy products, for example, which has approximately 12% organic solids, approximately 7.5% of the solids (fats and proteins) can be removed with DAF. However, the remaining 4.5% of the solids are soluble (lactose), and this can only be removed biologically. Aerofloat MBBR is a cost-effective and maintenance-friendly version of the Moving Bed Biofilm Reactor wastewater technique.