APPARATUS FOR AERATION OF WASTE WATER Russian patent published in 1994 - IPC

FIELD: mechanical engineering; apparatuses for saturating liquids with gases. SUBSTANCE: waste water aerating apparatus incorporates, air pipe, hold-down cover positioned concentrically outside core for movement along air pipe, and piston disposed inside perforated core of hermetically sealed above-piston chamber. Hold-down cover and piston are elastically positioned relative to perforated core. Air conduit communicates with hermetically sealed above-piston chamber via air pipe. Coils have multiangular cross-section and arranged in several rows. Adjacent coils contact one another by facets. EFFECT: more sophisticated design. 1 dwg