A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Phosphorus and Heavy Metal Extraction from Wastewater Treatment Plant Sludges Using Microwaves for Generation of Exceptional Quality Biosolids
The objectives of this study were to evaluate the amount of phosphorus and metals in sludge that can be released into solution by microwave irradiation when applied to sludge before anaerobic digestion and determine the effectiveness of subsequent lime precipitation. The fraction of phosphorus in the soluble form increased to 23 to 28% for thickened sludge and to 31 to 38% for unthickened sludge, after raising temperatures by microwave heating to 50 to 70°C. Microwave irradiation also caused the release of arsenic, molybdenum, nickel, and selenium into solution to 33, 15, 13, and 28% for thickened sludge and 63, 61, 37, and 27% for unthickened sludge, respectively. Microwave irradiation has been found to destruct pathogens in sludge to meet Class A biosolids requirements. Therefore, the reduction of phosphorus and metals in biosolids using microwave heating is economically attractive when considered as a secondary benefit to the use of microwave heating to generate Class A biosolids.
Phosphorus and Heavy Metal Extraction from Wastewater Treatment Plant Sludges Using Microwaves for Generation of Exceptional Quality Biosolids
The objectives of this study were to evaluate the amount of phosphorus and metals in sludge that can be released into solution by microwave irradiation when applied to sludge before anaerobic digestion and determine the effectiveness of subsequent lime precipitation. The fraction of phosphorus in the soluble form increased to 23 to 28% for thickened sludge and to 31 to 38% for unthickened sludge, after raising temperatures by microwave heating to 50 to 70°C. Microwave irradiation also caused the release of arsenic, molybdenum, nickel, and selenium into solution to 33, 15, 13, and 28% for thickened sludge and 63, 61, 37, and 27% for unthickened sludge, respectively. Microwave irradiation has been found to destruct pathogens in sludge to meet Class A biosolids requirements. Therefore, the reduction of phosphorus and metals in biosolids using microwave heating is economically attractive when considered as a secondary benefit to the use of microwave heating to generate Class A biosolids.
Phosphorus and Heavy Metal Extraction from Wastewater Treatment Plant Sludges Using Microwaves for Generation of Exceptional Quality Biosolids
Danesh, Paymon (author) / Hong, Seung M. (author) / Moon, Kyong W. (author) / Park, Jae K. (author)
Water Environment Research ; 80 ; 784-795
2008-09-01
12 pages
Article (Journal)
Electronic Resource
English
Ion Exchange Extraction of Heavy Metals from Wastewater Sludges
| Online Contents | 2004
Treatment and disposal of wastewater sludges
| TIBKAT | 1974
Heavy-Metal Sludges as Smelter Feedstock
Online Contents | 1994