Struvite is a persistent concern in many clean-water plants. The substance (chemical name magnesium ammonium phosphate) can build up inside anaerobic digesters and in pipes, pumps and other solids processing equipment.Struvite accumulation can reduce flow through digester piping, thus limiting plant capacity. It can also reduce dewatering efficiency and increase phosphate loading in the return liquor, leading to less efficient phosphorus removal.CNP-Technology Water and Biosolids Corp. now offers the AirPrex process for removing struvite from the biosolids stream. It is designed as a complete biosolids optimization and phosphorus recovery system, installed after anaerobic digestion but before dewatering.While the process can
