Aerator for feeding large and small diameter air bubbles into waste water has elastomeric sleeve with slits, through which air emerges, on support with rectangular cross-section, larger sides of rectangle being very much larger than shorter

摘要

Aerator for feeding large and small diameter air bubbles into water has an elastomeric sleeve (4) with slits, through which the air emerges. This has an internal support (1) with a rectangular cross- section, the larger sides of the rectangle being very much larger than the shorter sides.