WeirWasher Automated Cleaning Systems remove the algae, scum, grease and other material from the weirs and other surfaces on clarifiers, thickeners and other tanks. WeirWasher, ACS uses plant non-potable water to clean irregular and porous surfaces, bolts and any other irregularities. We have systems for square and irregular applications as well. These weir and clarifier cleaning designs have been in service for over 8 years. Our nozzles are in use in many industrial applications and have proven to be the best available. WeirWasher, ACS can clean surfaces under the water level up to one foot under water.
Request a copy of a study being conducted to determine the effectiveness of this system and the direct effect to UV disinfection chamber fouling.

Here are some of the features of WeirWasher, ACS:

IMPROVE SAFETY

• Significantly reduces time in or near the treatment equipment performing cleaning maintenance
• Reduce algae fouling and cleaning in sand filters, UV disinfection, chlorine contact tank
• Spray penetrates up to 12 inches below water line to clean inaccessible/dangerous clarifier designs

PERFECT RETRO FIT

• ALL CLARIFIER DESIGNS (square, rectangle, round)
• Maximum design flexibility
• NO costly tank changes such as bolt head removal, baffle bracket replacement or walkway support removal
• Articulate around obstructions-walkway supports, dual troughs, multi sided launders

NON CONTACT CLEANING

• Excellent choice for primary clarifiers, thickeners or settling tanks with grease, pulp or sludge accumulation
• Light Weight Design – no counterweights need

GREEN TECHNOLOGY

• Minimal water usage compared to fire hose method
• Narrow cleaning stream and rotation-maximize the available pressure for effective material removal, control and cleaning
• ELIMINATE need for chemical usage to control algae
• WATER is an EFFECTIVE CLEANER even at lower pressures- no need for brushes or scrapers
• Small carbon foot print-few replacement parts

DYNAMIC SYSTEM

• Algae control system can change with the facility capacity
• Maximize results with the addition of a booster pump as flows increase
• Sludge and debris accumulating on surface will be driven back into solution
• Feed well sprayer for foam and sludge accumulation control

PROTECT UV INVESTMENT

• Prohibit large algae bloom growth that can break off and foul the UV chamber and require removal
• Large algal blooms can reduce UV effectiveness or cause bulb breakage
• Prevent Algae slugs from seeding the UV chamber

SIMPLE to OPERATE-TRULY AUTOMATED

• Controlled directly by SCADA or timer, the solenoid valve requires No manual engagement or disengagement
• Uses available non-potable plant water
• System drains when off so *No Freezing*
• Clarifier bottom cleaning attachment--pre clean tank before entering
• Few Moving Parts=less maintenance
• Automated from outside of a covered tank for superior weir cleaning and maximum staff safety

LOWERS TSS

• Water spray cleans past brackets, walls, etc. to provide effective and consistent algae control and cleaning
• Water spray penetrates up to 12 inches below water surface
• Consistent daily cleaning
• Cleans irregular and porous surfaces
• Minimize UV chamber or other disinfection tank fouling

PERFORMANCE ENHANCING

• Optimizes clarifier/thickener performance by allowing consistent flow over weirs preventing short circuiting and preventing solids collection in the influent trough
• Prevent large algal slugs from fouling cloth or sand filters
• Prevent fouling of UV chamber or other disinfection tank

WeirWasher, ACS model WWR uses the in plant service water of nominally 65 psig at 15 to 45 gpm depending upon surface area covered. Water is supplied to piping that runs under the walkway out to the center column. The piping then enters the center of the column running through the center of the drive unit. The piping proceeds down the middle of the center column and out the square holes in piping for the mixed liquor effluent. The pipng proceeds down the outside of the column to the location of the WeirWasher, ACS center unit. The pipe is then connected to the center stationary unit, which allows the water to enter the center unit. The water flows between the stationary and rotating components of the center unit. The piping is then connected to the rotating component of the center unit. The clarifier drive unit drives the center unit with the rest of the rotating structure. The piping is then routed along the scum arm or along the bottom structure of the rotating structure of the tank or clarifier. The piping then is connected to the spray apparatus, which sprays the areas needing cleaning. The areas that can be cleaned are as follows:

• Scum Ring (Inside and outside)
• Weir (Inside and Outside)
• Launder (overflow, sidewall, bottom)
• Outer wall (center mounted launder designs)

The center unit during operation is designed to have a small amount of leakage. This leakage allows the center unit to ride on a small water film between the stationary and rotating components of the center unit minimizing the horsepower necessary to rotate the rotating component of the center unit.