HYDRODYNAMIC CAVITATION-BASED PHOSPHOROUS REMOVAL DEVICE, AND WASTEWATER TREATMENT SYSTEM AND METHOD EMPLOYING SAME

摘要

A hydrodynamic cavitation-based phosphorous removal device, comprising: a hydrodynamic cavitation-based sludge minimization machine (1), and a mesh basket (3) containing scrap iron and arranged at a discharge pipe outlet (2) of the sludge minimization machine (1). The hydrodynamic cavitation-based sludge minimization machine (1) comprises at least two stages of cavitation devices connected in series. A first-stage cavitation device (100) comprises a first cavitator placed in a first-stage cavitation cavity (101) and a pulverization barrier plate (102) facing an outlet of the first cavitator (103). A second-stage cavitation device (20) comprises a second cavitator (21), a jet confining member (25), and a second-stage diffuser pipe (26) connected in sequence. The jet confining member (25) is located within an air dissolving cavity (23). The air dissolving cavity (23) is provided with an air dissolving adjustment mechanism. The cage (3) containing scrap iron is filled with scrap iron, and provided with mesh openings on a lower wall surface and side walls. Also provided are a wastewater treatment system and method employing the device. The device can be applied in an existing wastewater treatment system to reduce the volume of sludge and further improve a phosphorous removal effect.