 |
Carus Corporation Peru, IL U.S.A Tel + 1 815 223 1500 Fax + 1 815 224 6697 |
Carus Europe Asturias, Spain Tel + 34 985 78 55 13 Fax + 34 985 78 55 10 |
Web: www.caruscorporation.com Email: salesmkt@caruscorporation.com 1 800 435 6856 (Toll free US Only) |
 |
CARUS™
CARUS™
Struvite scale formation is a recognizable problem where anaerobic sludge digesters are part of the solids handling treatment scheme. These crystals will deposit in digester supernatant recycle lines, especially at elbows and on the suction side of pumps. They can accumulate on screens and dewatering equipment as well as in filtrate/centrate pumps and lines returning this water back to the head of the plant. These scale formations cause unscheduled shutdowns, the loss of solids dewatering capacity, and increased operating costs. Chemical cleaning of the struvite scale and preventing future scale formation is the most cost effective method to eliminate unscheduled disruptions to plant dewatering operations.
- Eliminates serious disruptions to plant dewatering operations by preventing deposits and plugging of equipment.
- Provides consistent dewatering operations; clean lines eliminate reductions in flow due to deposit build-up.
- Less down time, cleaning, and replacement of sludge dewatering lines or filtrate/centrate return lines.
- Eliminates scouring actions in the piping caused by breakaway deposits.
- Clear liquid with light amber color
- Specific Gravity: 1.30-1.36
- Keep from freezing
- pH: 7.0±0.5
- Weight: 10.8-11.4 lbs. per gallon
- Contains sequestrants and dispersants
- The product is available in 30- and 275-gallon containers.
WHAT IS STRUVITE AND HOW DOES IT FORM?
Struvite is magnesium ammonium phosphate (MgNH4PO4•6H2O). It forms in the anaerobic digestion process where the ammonia and orthophosphate react with the magnesium (hardness) present in the water. This is a case where more than one of the dissolved species (ammonium ion NH4+ and phosphate ion PO43-) is affected by the solution pH. At pH 10.7, struvite solubility is at a minimum. In an anaerobic digester, the sludge is in contact with an atmosphere containing about 30-40% CO2. When the sludge is exposed to air (containing 0.3% CO2), CO2 will be liberated from the sludge increasing the pH, and potentially exceeding struvite solubility, resulting in crystal formation. The problem magnifies itself in the filtrate/centrate lines because the component ions are concentrated.
APPLICATION
CARUS™ STRUVOUT dispersant and sequestrant is formulated to prevent scale under normal conditions. The product also contains a dispersant that will prevent scale formation under more severe conditions.
CARUS™ STRUVOUT dispersant and sequestrant is effective for sludge dewatering lines and equipment as well as in filtrate/centrate return lines to the head of the plant. The product is typically fed at 15-50 ppm dosages.
