Removal of oxytetracycline (OTC) in a synthetic pharmaceutical wastewater by a sequential anaerobic multichamber bed reactor (AMCBR)/completely stirred tank reactor (CSTR) system: Biodegradation and inhibition kinetics

SPONZA D. T., Celebi H.

BIORESOURCE TECHNOLOGY, cilt.104, ss.100-110, 2012 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 104
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1016/j.biortech.2011.10.056
  • Dergi Adı: BIORESOURCE TECHNOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.100-110
  • Anahtar Kelimeler: Anaerobic multichamber bed reactor (AMCBR), Completely stirred tank reactor (CSTR), Haldane, Inhibition, Oxytetracycline (OTC), METHANOGENIC CONDITIONS, MATHEMATICAL-MODEL, CONTACT REACTOR, BLANKET REACTOR, AZO DYES, ANTIBIOTICS, TOXICITY, PERFORMANCE, DIGESTION, FATE
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

An anaerobic multichamber bed reactor (AMCBR) was effective in removing both molasses-chemical oxygen demand (COD), and the antibiotic oxytetracycline (OTC). The maximum COD and OTC removals were 99% in sequential AMCBR/completely stirred tank reactor (CSTR) at an OTC concentration of 300 mg L-1. 51%, 29% and 9% of the total volatile fatty acid (TVFA) was composed of acetic, propionic acid and butyric acids, respectively. The OTC loading rates at between 22.22 and 133.33 g OTC m(-3) d(-1) improved the hydrolysis of molasses-COD (k), the maximum specific utilization of molasses-COD (k(mh)) and the maximum specific utilization rate of TVFA (k(TVFA)). The direct effect of high OTC loadings (155.56 and -177.78 g OTC m(-3) d(-1)) on acidogens and methanogens were evaluated with Haldane inhibition kinetic. A significant decrease of the Haldane inhibition constant was indicative of increases in toxicity at increasing loading rates. (C) 2011 Elsevier Ltd. All rights reserved.