AWWA JAW28841

The objective of this research was to examine the accumulation and adsorption capacity of powdered activated carbon (PAC) in a solids contact slurry recirculating clarifier (SCSRC). If high concentrations of PAC can be achieved in a sludge blanket, then PAC could be an efficient alternative to granular activated carbon for plants requiring only intermittent organics removal. A method to determine the PAC concentration in the clarifier slurry was developed based on a gravimetric analysis approach. It was found that very high concentrations of PAC (>4,000 mg/L) could be accumulated in an SCSRC; the profile of PAC accumulated through the clarifier revealed that the PAC was evenly distributed. Isotherm tests showed that the adsorptive capacity of the PAC-containing slurry for chloroform appeared to decrease somewhat when the residence time of the PAC in the clarifier was longer than 100 h. Includes 16 references, tables, figures.

Product Details

Edition:

Vol. 83 - No. 2

Published:

02/01/1991

Number of Pages:

10

File Size:

1 file , 1.8 MB