Rare-earth coagulant: not just for phosphorus removal. The many benefits of ClariPhos.
In the past few issues of our newsletter, we’ve shared several stories explaining how ClariPhos™ rare-earth coagulant can achieve phosphorus limits as low as 0.07 mg/L, without tertiary filtration. But this unique technology also provides many other benefits over conventional iron- or aluminum-based coagulants that can help improve operations and save money at wastewater plants. Here’s what ClariPhos can do:
- Improve clarifier performance: The rare earth minerals in ClariPhos bond more tightly to phosphorus and form a denser, heavier precipitate that settles about two times faster than alternatives, enabling clarifiers to operate more efficiently.
- Lower chemical consumption: ClariPhos achieves phosphorus removal at a 1:1 molar ratio due to the strong crystalline ionic bond that is formed. Iron- and aluminum-based coagulants can’t form the same type of ionic bond. Instead, phosphate adsorbs to the surface of the salt. As a result phosphorus removal occurs at a molar ratio of about 5:2, which means much more iron or aluminum coagulants are needed to achieve the desired level of phosphorus removal compared to ClariPhos.
- Reduce sludge volume by up to 70%: Since ClariPhos can achieve excellent phosphorus removal at a lower dose than alternatives, less sludge is produced. Less sludge, means less pumping, dewatering, hauling and disposal, which contributes to lower costs for each of these operations.
- Achieve up to 30% higher attained solids in dewatered sludge: ClariPhos produces a thicker, more compact sludge that can be more easily dewatered by passive processes such as Geotube® dewatering or mechanical alternatives.
- Inhibit the formation of struvite: Phosphorus is a key ingredient in struvite. Since ClariPhos binds tightly to phosphorus, it becomes unavailable to form struvite downstream of the dose point.
- Simplify handling and storage: ClariPhos is rated non-hazardous and has a low freezing point of -40°F (-40°C) making it easier and safer to handle, dose, and store than conventional alternatives.
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Learn more about the advantages of ClariPhos rare-earth coagulant.
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