Effects of Fenton Pre-Treatment on Waste Activated Sludge Properties

Erden G., FİLİBELİ A.

CLEAN-SOIL AIR WATER, cilt.39, sa.7, ss.626-632, 2011 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 39 Sayı: 7
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1002/clen.201000199
  • Dergi Adı: CLEAN-SOIL AIR WATER
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.626-632
  • Anahtar Kelimeler: Anaerobic biodegradability, Biological sludge, Box-Wilson experimental design, Fenton pre-treatment, Floc disintegration, ANAEROBIC-DIGESTION, DISINTEGRATION, SOLUBILIZATION
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

Fenton process was investigated for the purpose of biological sludge disintegration. The Box-Wilson experimental design was employed to evaluate the effects of major process variables (Fe(II) and H2O2 concentrations) on both disintegration and dewatering performance of sludge. Results showed that 4 g Fe(II)/kg total solids (TSs) and 60 g H2O2/kg TS are efficient for floc disintegration. Fenton pre-treatment enhanced the biodegradability of sludge. For 4 g Fe(II)/kg TS and 60 g H2O2/kg TS, 19.4% higher methane production was achieved compared to raw sludge in biochemical methane potential assay. Fenton pre-treatment resulted in the release of organic sludge components into the liquid phase. For 4 g Fe(II)/kg TS and 60 g H2O2/kg TS, dissolved organic carbon and total nitrogen in sludge's supernatant increased by 75.74 and 60.60%, respectively. Fenton pre-treatment enhanced the filterability of sludge and it can be applied for conditioning purpose before mechanical dewatering units.