A 5.7 MGD treatment works in Spain is located in a holiday and resort area.
The biosolids are septic resulting in high hydrogen sulfide emissions and dangerous working conditions.
976 - UNITED CAIROX® Potassium Permanganate is injected into the raw sludge pipeline, prior to the centrifuges.
A full-scale plant demonstration determined the optimum dosage to be 10 lb potassium permanganate/hour (800 mg/L)
CAIROX treatment lowered the H2S from 70-150 ppm to non-detectable in the dewatering room.
Bio-filter exhaust drops from 20 ppm to ND.