Struvite Causes Reduced Sludge Dewaterability and Wastewater Treatment Plant Capacity
In wastewater treatment plants with biological phosphate elimination, high phosphate concentrations occur in the digester’s anaerobic environment.
As a result, struvite (or MAP: magnesium ammonium phosphate) builds up inside the pipes, pumps and process equipment, causing problems including:
- Reduced plant capacity due to decreased flow through the digester’s pipes
- Reduced dewatering efficiency due to increased water bounding effects in the sludge by high phosphate levels
- Increased phosphate loads in the return liquor, which leads to a less efficient phosphate-elimination process and causes crystallization problems in pipes and pumps
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