Sediment activated carbon wastewater

In this treatment process, unit operations such as chemical coagulation, flocculation, and sedimentation followed by filtration, activated carbon, ion exchange, and reverse osmosis are employed to remove significant amounts of nitrogen, phosphorus, heavy metals, organic matters, bacteria, and viruses present in wastewater.2 It is always the last process step in the wastewater treatment plant that finally renders the treated wastewater reusable and disposable into the environment without any adverse effect (Figure 22.1). 

TREATABILITY/REMOVABILITY Process, Removable Range (%), Avg. Achievable Cone. ( xg/L)) Gravity oil separation, not available, 15.5 Filtration, 0, negative removal Sedimentation, >70-98, <5.3 Sedimentation with chemical addition (lime, polymer)-, 0, negative removal Sedimentation with chemical addition (lime)-, 0, negative removal Aerated lagoons, 33, 2 Powdered activated carbon adsorption (based on synthetic wastewater) 98, 0.03 Ozonation-, >90, <0.02 chlorination, 6 mg/L chlorine for 6 hr, initial concentration 53.14 ppb 98% reduction may be removed by reaction with O3 (half-life 37 min), and NO2 (half-life 7 days)... 

TREATABILITY/R.EMOVABILITY Process, Removable Range (%), Avg. Achievable Cone. (pg/L)) Gravity oil separation, not available, 550 Sedimentation, >71, <10 Powdered activated carbon adsorption (based on synthetic wastewater), 83, 0.015... 

Sedimentation with chemical addition (alum, polymer), 92, 5 Activated sludge, 50->99, 2500 Activated sludge (based on synthetic wastewater), 94, 300 Granular activated carbon adsorption, 76-96, 110... 

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