Improvements in and relating to the contacting of liquid mediums and gases

摘要

Sewage is aerated by gas introduced into the sewage medium by diffuser means 11 arranged in rows to cause gas bubbles to rise in the form of a multiplicity of spaced bands of gasification so that perimeter lines 33 of adjacent bands are separated by a distance of 40% to 150% of the sum of the widths of the said adjacent bands. Specifications 885,602 and 885,603 are referred to.