The Process is the Key
[ Safe Biosolids | Applications of Biosolids | The Process of Safe Recycling ]
Modern Technology Makes Biosolids Safe
Municipal wastewater treatment plants (WWTPs) use natural processes to stabilize and disinfect wastewater and the resultant solids. The processes of sedimentation, aeration, and biological degradation are employed to purify the water, stabilize, and disinfect the solids. WWTP processes are continuously monitored to assure effectiveness. This results in more than 99.9% of pathogens destroyed.
Biosolids Metal Concentrations Are Well Below Regulatory Standards
Only about 5% of PWD’s wastewater is from industrial sewer users. These industries are subject to federal regulations and City Ordinances that regulate the amount and concentration of wastes that may be discharged. Limits are based on extensive monitoring and research to determine the processing capacity of the wastewater treatment plant. Industries are subject to unannounced inspections and routine monitoring and laboratory analysis. Regulations and ordinances are strictly enforced and industry in Philadelphia and nationwide have come to view pretreatment requirements as inevitable.
States in Which Philadelphia's Biosolids have been Approved for Use
Many states use Philadelphia's high quality biosolids in the eastern area, including New York, New Jersey, Maryland, and Delaware. They are used for many projects, such as agricultural usage in Maryland, Delaware, and Pennsylvania; mine reclamation; and compost sales.
[ Safe Biosolids | Applications of Biosolids | The Process of Safe Recycling ]
