| Abstract |
| This study was carried out for sewage sludges generated from digestion tank and total phosphorus removal process in 5 municipal wastewater treatment plants in D city to investigate characteristics of dewatered sewage sludges. Aluminum, Fe and total phosphorus(T-P) were dominant component in the chemical sludge generated from total phosphorus removal process(CS) with 15~22%, 1.6~2.3% and 0.17~1.89% in mass. The other principal chemical components were Mn, Cu, Zn and Ni with 0.02~0.96% in mass. And aluminum contents of CS was in the range of 153~219 g/Kg which was 8 times higher than in digested sludge generated from digestion process. Also T-P contents of CS was about 12% of aluminum. These results showed that aluminum ions combined with not only phosphate ions, but also typical anions found in municipal wastewater. |
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| Key Words |
| Sewage Sludge, Total phosphorus, Aluminum, Chemical sludge, Digested sludge |
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