Sedimentation is the separation or concentration of suspended solids particles from a liquid by settling. Sedimentation can be divided into two operational processes, clarification and thickening. The objective of the thickener is to increase the suspended solids concentration, whereas the objective of the clarifier is to produce a clear effluent. Sciential's seasoned engineers are ready to assist in helping you achieve your process separation objective.
Conventional thickening usually refers to thickening without polymer(s). It is a process for concentrating particles in a suspension by gravity compression. Typical particle size and feed concentration range: 1-300 Ám and <10% v/v.
High Capacity refers to thickening that is well flocculated. A High Capacity thickener has a central feedwell where the flocculant(s) is mechanically mixed to the feed at variable mixing intensities. Typical particle size and feed concentration range: 1-300 Ám and <10% v/v. Bench-Scale Thickener Test Equipment and Procedures.
The design features include:
Provisions for Chemical Addition
Feedwell Energy Diffuser
Center Drive W/Variable Speed Control
Effluent Weir and Baffle
Inboard Effluent Launder
Higher Underflow Solids
Reduced Effluent Solids
Reduced Capital & Operating Expense
Higher Solids Concentration/Utilization of Compression Forces = Smaller Basin Footprint
The use of the bench unit has been utilized as a tool to optimize the full-scale thickener operation or determine the full-scale thickener unit. The use of the bench test unit will aid in determining the approximate underflow solids, settling velocity, visual floc structure, effluent clarity, chemical type, chemical dosage, mixing intensity, and mixing duration.