Characterize before selecting
Flow, COD, BOD, suspended solids, nutrients, oils and specific contaminants provide an initial picture.
Pretreat
Screens, grit and grease removal protect subsequent biological and mechanical steps.
Reduce pollutant load
Settling and biological treatment are common for biodegradable organic matter; other effluents require physicochemical or advanced treatment.
Clarify, disinfect and manage sludge
Treated water and sludge are two flows to manage. Overall performance should be assessed through their final destination.