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Clarification by gravity separation is one of the oldest and the most widely used unit operations for suspended and colloidal material separation from water and wastewater. Typical applications are raw water treatment and wastewater primary and secondary treatment. Eimco Water Technologies offers a wide range of products for different clarification needs.
Solids Contact Reactor Clarifier Flash Mix, Flocculation, and Sedimentation Combined in a Single Tank
All units are backed by over 50 years experience in engineering and manufacturing assuring the best fit to unique plant requirements.
Reactor-Clarifier™ units are used for softening, turbidity removal, and taste and odor removal applications. Reactor-Clarifier™ units combine a large diameter, slow speed concentric turbine generating high volume internal recirculation to promote mixing, flocculation and solids-contact. The recirculation system is designed to promote particle growth and improve the removal of suspended solids. Raw influent immediately contacts a large volume of dense floc from previously precipitated solids in the recirculation drum and is pumped upward by the turbine.
Depending on the application, a volume of 8 to 20 times the maximum influent rate is recirculated by the turbine to mix with new incoming feed, while the final effluent passes under the reaction cone to the clarification zone. Heaviest particles settle to the floor where they are raked to the center for recirculation or discharge. Depending of the application the mechanism can be supported by a bridge, which spans the tank or by a stationary center column mounted to the tank bottom.
EWT™ Clarifiers
The EWT™ Clarifiers are easily adaptable to special designs. In addition to standard optional features, our engineers will design and develop new features necessary to satisfy special application requirements. This may necessitate concepts never before incorporated in a clarifier, or may combine features in a new configuration. Whatever the special requirement of the installation, we will provide a design to suit user needs. Options readily available include but are not limited to:
Features and Benefits
EWT™ ClariThickener
Our EWT™ ClariThickener clarifier-sludge thickener provides an economical solution. In EWT™ ClariThickener both clarification and sludge thickening take place in a single basin.
Benefits
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Solids-Contact Reactor-Clarifier™ units are designed and built to provide the most economical solution to precipitation and clarification requirements. The basic machine design provides for flash mix, coagulation, flocculation, solids recirculation, clarification, and positive sludge removal in a single basin - eliminating the need for multiple tanks and associated piping and pumping.
In many wastewater treatment plants it is desirable to provide both clarification and sludge thickening. There is no question as to the advantages of sludge thickening prior to digestion, filtration incineration, or other methods of sludge disposal.
