Water oil separation

flootech water oil separation solution

The first stage of wastewater treatment in petrochemical applications is normally the deployment of API or coalescing plate interceptor (CPI) equipment for the removal of large amounts of oil and suspended solids from the effluent. These units use gravity and density differences between oil droplets, water and suspended solids to separate the different substances from each other. When it has risen, an oil layer is skimmed from the water surface, while bottom layers of sediment are removed by scraper and sludge pump. In CPI units, the separation of oil from water is intensified by the water motion through the plates, which collect oil droplets together as larger ones to separate them from water more easily.

FlooDaf® microflotation

Residual oil and suspended solids are separated by dissolved air flotation (DAF) called FlooDaf® microflotation. During this process pressurized air is dissolved into recycled effluent water to generate micro bubbles. The pressure is then released into the feed flow. The bubbles produce agglomerates with smaller specific gravity than that of water by attaching themselves with suspended particles. These agglomerates rise through the liquid and the air-water-solid mixture is distributed uniformly across the flotation tank, thus forming a floating sludge layer that is removed by surface skimmers. Heavier solids settle to the bottom of the tank and can be discharged from there. Clear liquid supernatant on the sediment layer is withdrawn under a tank baffle and over the weir for reuse or for treatment by coagulation and flocculation.

For coagulation and improved flocculation, chemical treatments are usually needed to maximize the efficiency of floc formation and separation. Emulsions of oily materials can be broken by acidification, the addition of alum or iron salts (inorganic coagulants) and by using emulsion-breaking polymers.

Flootech offers circular and rectangular FlooDaf® microflotation units of several sizes and varieties to suit the particular needs of individual sites and to optimize the process.

Related markets

flootech petrochemical market Petrochemicals can be a valuable product, the production of which demands efficiency, and that efficiency is tied tightly to the production, processing and use of water.
flootech oil and gas market Oil&Gas can be a valuable product, the production of which demands efficiency, and that efficiency is tied tightly to the production, processing and use of water.
flootech food and beverage market Food and Beverage can be a valuable product, the production of which demands efficiency, and that efficiency is tied tightly to the production, processing and use of water.
flootech power market Often, water sources are located far from the places of Power plants. Almost always, the Power sector’s treatment of water is subject to exacting standards and environmental regulations. Flootech can be relied upon to recommend the ideal processes, technologies and products for our clients to address their particular circumstances and meet their specific requirements.
flootech metal treatment market Metal treatment can be a valuable product, the production of which demands efficiency, and that efficiency is tied tightly to the production, processing and use of water.
flootech municipal wastewater market Almost always, the Municipal wastewater treatment sector’s treatment of water is subject to exacting standards and environmental regulations. Flootech can be relied upon to recommend the ideal processes, technologies and products for our clients to address their particular circumstances and meet their specific requirements.
flootech other industrial market Often, water sources are located far from the places of Industrial plants. Almost always, the Industrial sector’s treatment of water is subject to exacting standards and environmental regulations. Flootech can be relied upon to recommend the ideal processes, technologies and products for our clients to address their particular circumstances and meet their specific requirements.

Related technologies

flootech floodaf technology Dissolved Air Flotation (also known as microflotation) is a well-known method of particle separation. Microbubbles are created by dissolving air into water under pressure. When the air-saturated pressurized water is released, microbubbles are formed. Chemical, physical and electrical forces cause suspended solids and colloids to attach to one another and to air bubbles. These particle flocs then float to the water’s surface and are scraped off. Coagulation and / or flocculation chemicals are used to enhance the process.
flootech floobed mbbr technology The FlooBed® MBBR, Moving Bed Biofilm Reactor, is a biological treatment process for industrial and municipal applications. The core of the process is an advanced biofilm carrier element combined with optimized, energy efficient aeration and mixing, using continuous process control.