APPLIANCE

•   Discharged air
•   Sterilisation
•   Wastewater

Ozone-Flotation Systems

Fish and meat processing companies often generate large organic wastewater charges, depending on complying with directives set by state and municipal governments. oxytec's flotation systems offer an effective, economic and nonpolluting alternative for the preliminary purification of organically charged effluents, making them reusable:

• oxytec's flotation systems exclusively work with ozone and oxygen, without using any kind of chemical agents.
• Above 95% of all fat compounds are destroyed. Also a significant reduction of the water's oxygen demand (up to 90%) is achieved. The purified wastewater can be induced directly in the communal waste water system without additional charges.
• Olfactory molecules are nearly completely destroyed. The water can be used, for example, as cleaning water for the vehicle fleet. It can also be additionally recicled by using reversed osmotic systems. The remainig clearing sludge is free of chemical components and can be used as fertiliser or food in animal husbandry.
• During preliminary sedimentation of organically charged effluents no by-products are generated. Water is treated just with ozone and oxigen. The clearing sludge remains free of chemical components and doesn't generate any foam during combustion. Alternative uses such as food or fertiliser are possible. In addition, the dry portion is about 45%.
• The flotationplant is free of unpleasant odours.
• This technology is characterised by low energy costs (based on an average effluent amount of approx. 600 cbm/day only about 32 kWh are needed)

Examples of use in fish processing industry and convenience food production
The Danish Prime Mou, the Danish Prime Food Company and the Sæby Fiske-Industri in Denmark had significant wastewater costs due their large organical cargo. Since the installation of an ozone-based flotation plant they just need to pay ordinary charges.

In all companies the installation of a pumping font and a buffer tank with integrated filter was a premise for the ozone flotation. The water is pumped in the tank over the pumping font, where raw components are extracted via a water strainer. At the same time, the buffer tank is used to adjust the pH-value needed for the ozone flotation treatement of the wastewater.

Water is pumped from the buffer tank into the ozone flotation, where a significant reduction of organical compounds takes place. After the treatment it's directly discharged into the communal waste water system.

A sludge pump conducts the remaining flotate directly to a removable container, regularly drained on a biogas plant.

Analytical studies made after the installation of ozone-based flotation plants led to the following results: