Phosphorus removal from slaughterhouse wastewater can be
achieved by chemical–dissolved-air flotation (DAF) system. Although
the addition of chemicals to remove phosphorus can be done at
different stages of the wastewater treatment such as raw wastewater,
primary clarifier effluent, biological units, when it is done after
biological treatment effluent, efficient metal use and good process
stability are observed in the high-quality effluent produced