Triveni Engineering & Industries Ltd supplies Roto-Skimmer. Triveni Engineering & Industries Ltd is ISO 9000-2000 and ISO 14001 certified. Roto-Skimmer is simple and economical skimming equipment that is widely used in municipal and industrial wastewater installations. The Roto-Skimmer consists of a slotted steel pipe installed with the edge of the slot slightly above the liquid surface, so that when the edge is rotated below the surface, floating material and some liquid flow into the pipe openings and are flushed out of the tank for disposal. Roto-Skimmer is available in four basic types: lever, rack & pinion, worm gear and motor operated.