When applied to primary settled solids (prior to thickening/digestion), the effect of the PRI technology is two-fold:
An unavoidable benefit of controlling struvite scaling is lower biogas H2S levels. Further, the incidence of H2S inhibition within the digestion process is much reduced.
With higher H2O2 doses, mercaptan levels may decrease though care must be taken to ensure that residual D.O. does not carry-over into the anaerobic digesters.
When applied to digester effluent prior to dewatering, PRI-Tech frees up Fe2+ from FeS (and oxidizes Fe2+ to Fe3+) with the effect being to partition more phosphorus into the dewatered cake. Side benefits include improved dewatering efficiency, reduced struvite scaling, and enhanced odor control. By capturing more phosphorus into the solids cake, less is returned to the plant influent and so plant-wide phosphorus loadings are lowered – in some cases enough to meet tighter effluent nutrient limits. Phosphorus loadings in dewatering sidestreams can be several hundred mg/L and comprise 25-50% of the total plant phosphorus loading.
PRI-TECH® is an innovative combination treatment that integrates iron salts with hydrogen peroxide (H2O2) in a unique and synergistic fashion, resulting in cost savings and treatment enhancement compared to traditional iron salt use.
5640 Cox Rd.
Glen Allen, VA 23060
Toll-free (800) 851-8527
Phone (804) 404-7696
3020 Gore Road
London, Ontario N5V 4T7
Toll-free (800) 851-8527
Phone (804) 404-7696