Dissolved Air Flotation (DAF)

DAF is ideally suited to particles and flocs that are of neutral density, slow-settling or buoyant. This is particularly relevant to water, food and other industries where wastewater frequently carries large volumes of low density solids which are unsuited to settling. DAF also takes up considerably less space than settling methods: generally less than 25% of the equivalent surface area is required.

The Jacopa DAF system is a compact clarification process for the primary treatment of potable water and tertiary treatment of wastewater. Jacopa DAF is particularly suited to raw water supplies that are vulnerable to unicellular algal blooms and high colour. In wastewater treatment it has applications in the removal of oils, fats and low density solids. It works through a process of flocculation and flotation.

Feed water is usually (although not always) dosed with a coagulant and/or a flocculants to conglomerate the colloidal particles into larger clusters. Dissolved air under pressure is then introduced to the process which floats the suspended particles to the surface forming a froth layer which is removed by a scraper system. DAF is ideally suited to particles and flocs that are of neutral density, slow-settling or buoyant. This is particularly relevant to water, food and other industries where wastewater frequently carries large volumes of low density solids, unsuited to settling. DAF also takes up considerably less space than settling methods: generally less than 25% of the equivalent surface area is required. Our high-quality systems are specially engineered to suit each application. Most are constructed from stainless steel, although other materials can be used to suit unusual or highly corrosive environments.

A Jacopa DAF system is just one of the separation systems that form part of a complete wastewater treatment plant. Generally the design also incorporates: collection wells, pumping systems, primary screening, chemical dosing systems, equalizing tanks, sludge dewatering, electrical control systems, instrumentation and secondary treatment methods. Our extensive knowledge and understanding of the processes that generate potable water and wastewater is critical to the successful implementation of DAF systems as a treatment stage.

Key Features & Benefits include:

• Primary treatment of Potable Water
• Tertiary treatment of Wastewater
• Heavy-duty scraper system designed for continuous use
• Robust construction designed to suit each application
• Stainless steel construction.

 

A Jacopa DAF system is usually the most appropriate separation device for wastewater treatment:

• Industrial fog removal chemical reclamation
• Municipal tertiary treatment
• Raw water primary treatment