Release of phosphorus through pretreatment of waste activated sludge differs essentially from that of carbon and nitrogen resources: Comparative analysis across four wastewater treatment facilities

The accumulation of phosphorus in activated sludge in wastewater treatment plants (WWTPs) provides potential for phosphorus recovery from sewage. This study delves into the potential for releasing phosphorus from waste activated sludge through two distinct treatment methods—thermal hydrolysis and pH adjustment. The investigation was conducted...

Proteins in hydrothermal carbonization liquor of sewage sludge interfere with vivianite crystallization for phosphorus recovery

Hydrothermal carbonization (HTC) liquor of waste activated sludge generated during urban sewage biotreatment contains high concentrations of phosphate and thus is an appropriate resource for phosphorus recovery. The influence of proteins in the HTC liquor on vivianite crystallization, as a promising phosphorus recovery method, was...