PHENOLIC WASTEWATER TREATMENT WITH A PUMICE-COATED ROTATING BIOLOGICAL DISC (PCRBD) REACTOR

KOCADAĞİSTAN B., Gunay N.

FRESENIUS ENVIRONMENTAL BULLETIN, cilt.23, sa.6, ss.1389-1396, 2014 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 23 Sayı: 6
  • Basım Tarihi: 2014
  • Dergi Adı: FRESENIUS ENVIRONMENTAL BULLETIN
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1389-1396
  • Atatürk Üniversitesi Adresli: Evet

Özet

The performance of one stage and two parallel-shaft pumice coated rotating biological disc reactors was investigated for the removal of phenol and chemical oxygen demand (COD) from synthetically prepared wastewater, at various volumetric loadings (range 90-8640 g phenol/m(3).day and 216-20736 g COD/m(3).day). Higher removal efficiencies were achieved at 360 g phenol/m(3).day (97.99%), at 810 g phenol/m(3).day (97.36%), at 1080 g phenol/m3.day (94.00%) and at 1620 g phenol/m(3).day (90.00%). Similarly, COD removal rates were also higher. At the volumetric loadings of 864, 1944 and 3888 g COD/m(3).day, removal rates were observed to be 91.81, 87.01 and 85.65% respectively. At the highest loading, removal rates were observed as 35.31% for phenol and 31.05% for COD. Disc surface area in total was increased from 0.756 m(2) to 593.46 m(2) due to the disc coating technique with pumice. Thus, higher area loading rates decreased removal nearly by 800 times at the same initial phenol concentration and flow-rate conditions (e.g., from 45714.29 to 58.23 g phenol/m(2).day).