H Hydrotech™ Disc Filters Hydrotech™ mechanical and self-cleaning Disc filters provide reliable suspended solids removal for municipal effluent polishing and industrial water reuse. Filtration S Spidflow® Dissolved air flotation (DAF) technology for the clarification of any kind of water source containing suspended solids, organic matter, algae and floating matter (grease, oil, etc.). Sedimentation - Clarification - Flotation