Dissolved Air Flotation (DAF) Equipment
Horizontal Dissolved Air Flotation (DAF) Unit
In papermaking white water, printing and dyeing wastewater, food processing, oily wastewater, and some municipal tail water, large amounts of suspended solids, emulsified oil, and algae are lighter than water and difficult to settle. Traditional sedimentation processes "cannot settle them down or remove them cleanly." Rihong Environmental's horizontal dissolved air flotation (DAF) unit releases 20–40 μm microbubbles through pressurized dissolved air, allowing flocs, oil droplets, algae, and other lightweight pollutants to "ride the bubbles and float up," where they are continuously removed by a skimmer, achieving efficient solid-liquid separation and water quality purification.
Shallow Scraper DAF
Facing the challenges of algae removal in water supply, low-temperature low-turbidity water, papermaking whitewater, food oils and greases, and petrochemical oily wastewater—where "lightweight pollutants won't settle and occupy large areas"—traditional dissolved air flotation (DAF) tanks are deep, have long retention times, and require large footprints, often becoming the land bottleneck for water treatment plants. Rihong Environmental's Shallow Scraper DAF implements the "shallow pool theory" as a circular shallow tank unit—with a tank depth of only about 650 mm, center inlet, peripheral outlet, and rotating scraper—greatly shortening the bubble rise path. The surface loading is several times that of traditional DAF, with a retention time of only 3–5 minutes, achieving a smaller footprint and clearer effluent at the same treatment capacity.