Density currents form in all activated sludge clarifiers. The dense influent cascades downward and becomes a current moving in a horizontal plane just above the sludge blanket, attracting lighter solids and short-circuiting the main clarification volume of the tank.
The Dual Surface Baffle has a wedge-shaped configuration with identical upper and lower surfaces. The upper surface is identical to the Stamford Baffle 2.0® design, using the 30° inclination angle and the same algorithm to determine the baffle’s horizontal projection based on clarifier diameter.
There are two significant maintenance and operations issues that can affect clarifier performance. Algae growth in the clarifier effluent launder channel Odors generated in the clarifier as the effluent breaks over the clarifier weir. Both of these problems can be dealt with effectively by covering the effluent launder channel with one of several types of Launder Covers.
It is estimated that more than 80% of the odors in the clarifier are produced when effluent breaks over the weir and flows into the launder channel. NEFCO Odor Covers are sealed systems designed to contain these odors and/or operate in conjunction with scrubber systems that draw the trapped gases off and treat them to eliminate the odor.
NEFCO offers complete Effluent Trough Systems that include weirs, scum baffles, drop boxes and stainless steel, galvanized steel or FRP trough supports, as well as one-of-a-kind troughs for unique treatment plant applications.
The lightweight panels are easy to install and can be easily removed for cleaning and access. Baffle panels are available multiple configurations, designed for installation of new systems or the rehabilitation of existing systems.
Weirs and scum baffles are the ever-present nuts and bolts of the treatment plant, where the versatility and durability of fiberglass makes it the material of choice for this equipment.