Significant benefits of combining acid digestion and PAD – what if your digesters were the sidestream? PRESENTATION ONLY

Williams, M., Thermal Process Systems, Inc., USA


Anaerobic Digestion Challenges

 Nutrient Recycle from Dewatering
 Ammonia Production
 Phosphorus Release
 Struvite
 Hydrogen Sulfide
 Dewatering Performance
 EPS formation
 More coagulant & Polymer
 Low Solids %
 Odors in room & solids

There are several solutions!
 Sidestream Deammonification (Anammox, etc.)
 Struvite Precipitation & Recovery (Mg Addition)
 Ferric Chloride Addition to control H2S (& Struvite)
 Odor Control (chemical, scrubbers, etc.)

Most current approaches are treating symptoms and not focused on the digestion process…

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