DAF, Dissolved Air Flotation Systems

Dissolved Air Flotation System, DAF Hydro Flo Technologies flotation (DAF & IAF) systems are designed to accommodate flow rates as low as 10 gallon and as high as 3,000 gallons per minute. The primary function of our flotation systems is to remove free and dispersed oils, emulsified oils along with dispersed suspended solids from wastewater or process water streams. This makes it possible for sensitive downstream equipment to perform as designed. A properly designed flotation (DAF) system will reduce the overall operating costs and improve overall system maintainability.

Dissolved Air Flotation System, DAF As a separation device, flotation systems exhibit extremely high solids capture ratios, and will yield the highest level of recovered solids under a wide range of flow conditions. Oil/grease and suspended solids removal rates of greater than 95% are normal. Hydro-Flo has some customer applications reporting 99.9% O&G and SS removal. Because of there outstanding performance and reliability, Hydro-Flo flotation systems are the preferred process for a wide range of industrial water and wastewater treatment problems.

Dissolved Air Flotation
(DAF)

• Dissolved Air Flotation
System Equipment Overview

• Detailed Dissolved Air
Flotation System Description

Induced Air Flotation
(IAF)

• Induced Air Flotation
System Equipment Overview

• Detailed Induced Air
Flotation System Description

Chemical pretreatment for flotation systems:

Chemical pretreatment is not always needed with flotation systems. When used, chemical pretreatment allows for the separation and removal of contaminants a DAF or IAF alone will not remove. Most pretreatment applications require the use of acids, caustics, coagulants and a flocculating polymers. The more common coagulants are inorganic salts such as alum, ferric chloride, ferrous sulfate, lime, sodium hydroxide or organic polymers. Preconditioning requirements are usually site specific and will impact operating cost, effluent quality, sludge volume and possibly water reuse.

The Hydro-Flo Technologies dissolved air flotation and induced air flotation systems can handle difficult wastewater applications as stand alone systems, or with any combination of chemical inputs including liquid polyelectrolyte's, dry powders, and organic and inorganic wastewater chemicals with various injection rates.

Hydro-Flo customers have the opportunity to utilize our wastewater tech resources located in St Charles, Illinois, USA. Instead of sending a grab sample (which may or not be truly representative) to our facility for analysis, we dispatch a chemist to your site in order to review your entire process. Representative wastewater samples are taken and jar tests conducted on site to identify the most cost effective chemical pretreatment program. A lab test study will also determine the most relevant equipment for your application. Our on site lab tests also tell us the proper chemical treatment, proper mixing times, as well as present us with a good understanding of how and where to locate the chemical injection points in the piping system ahead of the flotation system. Lab studies identify approximate operating costs and wastewater cost savings. All this information is very valuable and necessary in order to develop the proper chemical regime and determine the proper sizing of the separation systems.

Contact Hydro-Flo today for details.