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:
Until now, the main methods of struvite removal have been:
Unlike these other systems, AirPrex™ is a complete sludge optimization and phosphorus recovery system that’s installed between anaerobic digestion and dewatering. The boundary conditions for struvite precipitation are set by air stripping in the AirPrex™ reactor and the addition of a magnesium chemical product. This combination of biological phosphate elimination and the AirPrex™ system achieves unrivaled effectiveness in terms of wastewater dewatering efficiency and cost savings.
The AirPrex™ process has been designed to produce maximum return on investment and make a significant impact on your treatment plant’s cost of operations. The elimination of struvite through this unique process leads to a 90 to 95 percent phosphate reduction in the returned liquor (up to 15 percent related to the incoming P-load).
By optimizing the sludge and removing most of the phosphate before dewatering, the water bounding effect of the phosphate is mitigated before dewatering. As a result, the dewatering process is more efficient and less polymer is required.
By optimizing the sludge and removing most of the phosphate before dewatering, the dewatering process is more efficient, allowing for drier cake solids.
Eliminating the majority of the P-recycling load increases the overall efficiency of the biological treatment process.
With the AirPrex™ struvite removal process, pipe treatment and repairs are minimal to maintain the desired capacity of the digester pipes.
In addition to removing struvite, you can also resell the high-phosphate dry solids as fertilizer.
cnp Technology Water and Biosolids Corporation
designs and supplies systems for nutrient recovery and
sludge optimization. Led by a team of wastewater industry
veterans and supported globally by engineers with decades
of experience in biosolids treatment, cnp continues to
pioneer innovative wastewater system solutions.
cnp-Technology Water and Biosolids Corp.
9535 58th Place | Kenosha, WI 53144
+1 262 764 3651, Fax: +1 262 764 8705
cnp-Technology Water and Biosolids GmbH
Merkurring 46 | 22143 Hamburg
+49 40 6699 680-0, Fax: +49 40 6699 680-29
Your partners at cnp can easily incorporate this value-producing technology into your operation in any plant setting, including retrofitting it to your existing infrastructure. Contact us today to get started.