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High-Performance Dissolved Air Flotation Plant
The Dissolved Air Flotation (DAF) process has been used successfully for many years for the continuous removal of gross contamination from medium to high flow rates of waste water. It combines flocculation treatment with the injection of air to separate a wide range of waste material into the foam formed on top of the vessel, which is removed with a scraper.
The DAF is a compact unit with low power consumption. Simple operational controls means that its easy to run. With high particulate removal efficiency (can be up to 95%) and 20-100 micron bubble size resulting in high oxidation rates, it is a highly efficient plant.
DAF units are often used to treat oily or fatty waste preceding subsequent biological treatment, or to reduce the cost of treating high BOD wastes in local sewage systems. With the appropriate choice of flocculent and operating conditions a wide range of contaminants may be removed and the basic concept has been in use in many applications for several years.
Traditional DAF plants are typically large, open process units, with a considerable component count and consequential high maintenance and space costs. This has tended to limit their application to the larger sites.
In line with WMEC’s policy of re-engineering well tested waste treatment processes to modern standards of performance, we have developed a new design of DAF cell with an optimised reactor and the most modern air injection technology to achieve new levels of efficiency and space utilisation. It creates the opportunity for the first time for smaller waste flows to be treated, as well as enabling considerable space and cost savings for those with a larger flow rate to treat.
The WMEC unit is extremely flexible in operation and can be set up to process waste water in a single pass or recycle loop depending on the effluent characteristics and required air/solids ratios.
Typical applications
- Synthetic coatings, water based glues
- Paints & inks
- Metals, nickel and chromium baths
- Blood, fats and oils
- Suspended solids removal
Performance
Performance always depends on the flow rate and composition of the waste stream, as well as flocculation conditions. The following data are only to be taken as an indication of what may be achieved under the conditions of the trials reported.
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Click to view Flow Rate Chart
Please contact us for more detailed information.
