Effect of sludge age on heavy metal biosorption by selector activated sludge
INTERNATIONAL JOURNAL OF ENVIRONMENT AND POLLUTION, cilt.34, ss.400-411, 2008 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 34
- Basım Tarihi: 2008
- Doi Numarası: 10.1504/ijep.2008.020806
- Dergi Adı: INTERNATIONAL JOURNAL OF ENVIRONMENT AND POLLUTION
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.400-411
- Bursa Uludağ Üniversitesi Adresli: Evet
Özet
The influence of sludge age on the metal biosorption characteristics of an aerobic selector-activated sludge was investigated. Two bench-scale aerobic-activated sludge systems were operated at sludge ages of 5 days and 15 days for studying biosorption of Cu and Cr(VI). In-vitro batch experiments were performed to compare biosorption characteristics of the sludge samples harvested from the bench-scale systems. Adsorption capacity (k) of the sludge for both of the metals was found to decrease with increasing sludge age from 5 days to 15 days However, percent removals of the metals were variable in relation to sludge age. Although Cr(VI) removal increased from 33% to 68%, Cu removal exhibited a slight decrease from 81% to 74% with increasing sludge age.