Ordinary sedimentation tanks rely on gravity to sink solid impurities, which cannot capture light oil foam and tiny suspended particles floating on wastewater surface. The dissolved air flotation unit inside Qdevu wastewater treatment plant generates massive micro bubbles to attach floating pollutants. The bubble pollutant aggregates rise to water surface within several minutes, far faster than natural sedimentation process. This core air flotation module handles oily wastewater from food processing and mechanical workshop perfectly without long waiting time.
If large volume of grease and solid particles flow into aeration tank and membrane unit, microbial activity will be restrained and membrane components get blocked frequently. Installing dissolved air flotation at the front end of wastewater treatment system intercepts most floating pollutants in advance. The purified water entering subsequent procedures carries far fewer impurities, lowering cleaning frequency of sludge dewatering equipment and extending service life of filter membranes inside sewage treatment plant.
Single air flotation unit can only remove partial pollutants without flocculant auxiliary treatment. When matched with automatic dosing machine, dissolved air flotation can mix flocculant evenly with incoming wastewater to form dense flocs. Micro bubbles wrap flocs completely to realize thorough separation of organic suspended matter. This matching mode greatly improves removal rate of chemical oxygen demand and grease index for industrial wastewater treatment plant especially catering and slaughter wastewater.
Traditional large sedimentation tanks occupy huge factory space and need regular sludge cleaning work. The compact dissolved air flotation structure integrates air dissolving pump separation tank and slag scraper into one single frame. It occupies less than one third space of equal capacity sedimentation tank, which is suitable for small footprint industrial wastewater treatment plant and municipal sewage treatment projects with limited construction land.
Dissolved air flotation serves as core pretreatment unit of all kinds of wastewater treatment plant and wastewater treatment system. It accelerates oil and suspended solid separation and reduces maintenance pressure of subsequent sewage treatment equipment. Matched with dosing machine and sludge dewatering equipment, air flotation technology comprehensively lifts the whole purification efficiency of wastewater treatment engineering and helps facilities stably meet strict environmental discharge standards.
