Wastewater treatment powdered activated carbon

Bornhardt, C., J.E. Drewes, and M. Jekel. 1997. Removal of organic halogens (AOX) from municipal wastewater by powdered activated carbon (PAC)/activated sludge (AS) treatment. Water Sci. Technol. 35 147-153. 

D. E. Bums and G. C. Shell, Physical-chemical Treatment of a Municipal Wastewater Using Powdered Activated Carbon. Paper presented at the 44th Annual Water Pollution Control Federation Conference, San Francisco, CA. October (1971). 

D. E. Bums and G. L. Shell, Physical-chemical treatment of a municipal wastewater using powdered activated carbon. Sanitary Engineering Research and Development, Eimco Process Machinery Division, Envirotech Corporation, Final Report, FWQA Contract No. 14-12-585 (1971). 

Fig. 1. Alternative wastewater treatment technologies, where GAC = granular activated carbon, PAC = powdered activated carbon, POTW = publicly owned treatment works, and RBC = rotating biological contactor (— ), wastewater return flows (—— ), sludge.

Fluidized-bed powdered activated carbon systems represent another important process. The use of activated carbon for the tertiary treatment of secondary sewage effluents has been used extensively. Powdered carbon is as effective as granular activated carbon for removing the organic impurities from the wastewater. 

PACT [Powdered activated carbon treatment] A wastewater treatment process which combines activated carbon treatment with biological treatment, providing a single-stage treatment of toxic liquid wastes. Developed by DuPont in the 1970s at its Chambers Works, Deepwater, NJ, and now licensed by U.S. Filter/Zimpro. More than 50 units were operating in 1990. 

Powder dyes, dusting properties, 9 231-232 Powdered activated carbons (PACs), 4 747n in advanced wastewater treatment, 25 909... 

Lee. S.E., Shin, H.S., and Paik, B.C. Treatment of Cr(VI)-containing wastewater by addition of powdered activated carbon to the activated sludge process, imvzro/ . 5d. Technol, 23(ll) 67-72, 1989b. 

Figure 17 PACT wastewater treatment system general process diagram. Powdered activated carbon is added to the aeration tank influent in an activated sludge system. Polyelectrolyte is added to enhance flocculation of carbon flnes and microorganisms. Filtration may or may not be required. (From Ref. 27.)...

Activated carbon adsorption is a well-established process for adsorption of organics in wastewater, water, and air streams. Granular activated carbon (GAG) packed in a filter bed or of powdered activated carbon (PAG) added to clarifiers or aeration basins is used for wastewater treatment. In the pesticide industry, GAG is much more widely used than PAG. Figure 10 shows the process flow diagram of a GAG system with two columns in series, which is common in the pesticide industry [11]. 

T0812 Trans Coastal Marine Services, Bioplug/Bioconduit T0823 U.S. Filter Corporation, PO WW ER Wastewater Treatment System T0826 U.S. Filter/Zimpro Products, Powdered Activated Carbon Treatment (PACT) T0827 U.S. Filter/Zimpro Products, Wet Air Oxidation T0829 U.S. Microbics, Inc., Bio-Raptor... 

T0823 U.S. Filter Corporation, PO WW ER Wastewater Treatment System T0826 U.S. Filter/Zimpro Prodncts, Powdered Activated Carbon Treatment (PACT)... 

Powdered activated carbon (PAC) is used in water and wastewater treatment facilities to adsorb soluble organic materials and to aid in the clarification process. PAC is fed to a treatment system using chemical feed equipment similar to those used for other chemicals that are purchased in dry form. The spent carbon is removed with the sludge and can then be discarded or regenerated. Regeneration can be accomplished in a furnace or wet air oxidation system. There are seven types of physicochemical PAC process systems (21-24,36,37,45,46,52) ... 

Contents Indude process theory, treatment of municipal wastewater, and treatment of industrial wastes. Industrial waste treatment topics include pretreatment, oxidation of sludges, kinetics, effluent variability, inhibition, volatile stripping, nitrification/denilrifica-tion. powdered activated carbon, and priority pollutant removal. 

TREATABILITY/REMOVABILITY Process, Removable Range (%), Avg. Achievable Cone. (pg/L)) Gravity oil separation, not available, 30 Activated sludge (based on synthetic wastewater), -100, <50 Powdered activated carbon adsorption (based on synthetic wastewater), 94, 3000, Continuous activated sludge treatment simulator 75-99.9% removal... 

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