Struvite (MgNH4PO4·6H2O) formation in wastewater treatment systems, particularly in anaerobic digesters and sludge handling facilities, can cause significant operational problems such as pipe scaling and equipment clogging. To prevent struvite formation, several chemical parameters must be carefully controlled: 1) pH: Struvite formation is highly pH-dependent. It is most likely to occur at alkaline pH levels, typically between 7.5 and 9.0. Therefore, maintaining a lower pH can inhibit struvite precipitation. However, lowering the pH too much can negatively impact biological processes in the wastewater treatment system. A common strategy is to control the pH within a range that balances the need for struvite prevention with the requirements ....
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