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organic coagulant aide acts as a charge neutralization and bridging <br /> device to allow the smaller particles to get closer with each other and <br /> grow in size. <br /> The flocculated water then flows into the Lamella Settler, through <br /> specially designed feed distribution ducts. The slow moving, <br /> flocculated water enters the individual lamella plates where <br /> clarification of the process stream takes place. The floc particles <br /> settle over a short distance, until they reach the settling surface <br /> provided by each lamella plate. At this point the floc slides down the <br /> plate to the sludge hopper for collection and discharge. The inlet flow <br /> distribution arrangement prevents scouring and resuspension of the <br /> settled sludge. <br /> The clarified water flowing upward, is uniformly collected at each side <br /> of each lamella plate. Submerged orifices ensure even collection and <br /> prevent short-circuiting which can degrade effluent quality. <br /> Collection of the floc in the sloped bottom hopper helps to compress the <br /> water from the sludge. This compression effect produces a more <br /> concentrated liquid sludge. A higher dry solids concentration <br /> translates into lower blowdown volumes, and smaller sludge handling <br /> systems. <br /> The liquid sludge is automatically released from the Lamella Settler on <br /> a periodic basis proportionate to the inlet flow. A manual backflush <br /> valve is included for periodic cleaning of the blowdown line with <br /> utility water to prevent sludge build up and blockage. The backflush <br /> valve is also used to forward flush to the existing Sludge Drying Beds, <br /> when necessary. The blowoff sequence is completely independent of <br /> normal operation, so the system can continue to process untreated water <br /> as required. <br /> 11654 2-2 <br /> VLS120588 <br />