The effect of shallow air flotation and its good performance

Shallow air flotation is an excellent sewage treatment technology with reasonable design, convenient operation and economic operation. Shallow air flotation is mainly used for the purification and treatment of papermaking wastewater, chemical industry, printing and dyeing, food and other industrial wastewater. In order to achieve the ideal use effect, the super filter with guide plate is used for pretreatment to remove the coarse SS impurities in the sewage, reduce the operation load of the air flotation machine, and reduce the dosage of flocculant in the subsequent treatment process, which has a strong adaptability to the change of water quantity and water quality.

Shallow air floatation can also separate algae, fine suspended solids and micro aggregates in the ground and water; it can recover useful substances in industrial wastewater, such as pulp and filler in papermaking wastewater, instead of secondary sedimentation tank to separate and concentrate excess sludge. It is especially suitable for those biochemical treatment processes that are prone to sludge bulking, such as separation and recovery of suspended oil and emulsified oil in oily wastewater, separation and recovery of substances in ionic state, such as surfactant and metal ions.

Shallow air floatation adopts the principle of dissolved air floatation, which is to inject part of dissolved air water into the water to be treated, and use the tiny bubbles released from the dissolved air water to float the suspended solids or oil in the water to the surface, so as to achieve the purpose of solid-liquid separation. The shallow air flotation pool is very shallow, and the general water level is controlled at about 600mm, which greatly shortens the air flotation time and has high air flotation efficiency.

The shallow air floatation distributes water evenly and the released water rises directly without transverse flow, avoiding the influence of transverse flow on the floatation. The continuous operation of the rotary scoop type slurry collector can remove the suspended matter accumulated in the upper layer in time, and the interference is very small, so as to avoid the re sinking of the floating matter.

The shallow air floatation dissolved air tank has unique structure, small volume, but good dissolved air effect; the releaser has characteristics and uniform release, which is conducive to improving the air floatation effect; there is a continuous running sediment removal scraper near the bottom of the pool, which is convenient to remove the sediment in time, ensuring a clean and effective air floatation water depth at the bottom of the pool.www.khnwatertreatment.com