Scavenging apparatus
Scum drag
Scum removal system for liquid treatment tank
Sea cleaning and oil recovery vessel termed "scor-vessel"
Self leveling skimmer
Self-cleaning vacuum filter with relatively moveable surfaces fo
Self-cleaning vacuum head for recovering oil from beaches and th
Self-floating cover system for a body of water
Self-propelled apparatus for cleaning a water treatment tank
Separable hemodialysis system
Separable hemodialysis system connected by a movable arm
Separating one liquid from another
Separator vessel
Sewage settling tank
Sewage settling tank
Shallow water oil-skimming barge
Skimmer
Skimmer apparatus for sewage settling tanks and the like
Skimmer for oil spills
Skimmer for removing the surface layer from a stretch of liquid