Phenol biodegradation by different mixed cultures and the optimization of efficiency of the degradation

Kilic N., DÖNMEZ G.

ENVIRONMENTAL TECHNOLOGY, cilt.34, sa.15, ss.2251-2258, 2013 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 34 Sayı: 15
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1080/09593330.2013.765919
  • Dergi Adı: ENVIRONMENTAL TECHNOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.2251-2258
  • Anahtar Kelimeler: biomass, phenol, molasses, mixed culture, degradation, PSEUDOMONAS-AERUGINOSA, ACTIVATED-SLUDGE, M-CRESOL, KINETICS, REMOVAL, BATCH, GROWTH, PEROXIDASES
  • Ankara Üniversitesi Adresli: Evet

Özet

In this study, the phenol degradation capacities of four different mixed cultures, namely, Ankara Stream (AS), petroleum-contaminated soil (PS), olive mill wastewater (OMW), and drug mill wastewater (DMW) were investigated with regards to different pH levels, phenol (497.2-1183.0mg/L) and biomass concentrations (0.5-3.0%(v/v)). The most efficient culture was selected and the optimal conditions required for its highest performance in phenol degradation were studied. We found 100% phenol degradation for DMW at nearly 1000mg/L initial concentration. The optimum pH was 8 and the mixed culture could tolerate phenol levels up to approximately 1500mg/L. The selected culture degraded all of the phenol concentrations ranging from 497.2 to 1183.0mg/L with 100% efficiency after 48h and 120h incubation, respectively. Increasing the biomass concentration from 0.5% to 3.0% (v/v) level decreased the incubation time needed for complete degradation. The data indicate that the mixed culture used in this study can be taken as a good candidate for effective treatment of waters contaminated by phenol.