Biodegradation of pyridine in a completely mixed activated sludge process

  • Padoley K
  • Rajvaidya A
  • Subbarao T
 et al. 
  • 27


    Mendeley users who have this article in their library.
  • 61


    Citations of this article.


A potential bacterial culture (P1), isolated from garden soil and identified as Pseudomonas pseudoalcaligenes-KPN, was used as a starter seed to develop the biomass in a completely mixed activated sludge (CMAS) reactor and the system was evaluated for treatment of wastewater containing pyridine. The results of this study indicate that pyridine could be degraded efficiently at a loading of 0.251 kg pyridine kg MLSS-1d-1(0.156 kg TOC kg MLSS-1d-1) and at an optimal hydraulic retention time (HRT) of 24 h. Pyridine was used as the sole source of carbon and nitrogen by the biomass. Ammonia-nitrogen (NH3-N) was formed due to the metabolism of the pyridine ring. In the present investigation, the performance of CMAS with reference to pyridine biodegradation and the bio-kinetic constants for the biodegradation of pyridine, in a continuous system, were computed. The results indicate that a CMAS system inoculated with P. pseudoalcaligenes-KPN, under optimum conditions of HRT and pyridine loading, gives a yield coefficient of (Y) 0.29, decay coefficient (Kd) 0.0011 d-1, maximum growth rate constant (μmax) 0.108 d-1and saturation rate constant (Ks) 5.37 mg L-1for pyridine. © 2005.

Author-supplied keywords

  • Activated sludge
  • Ammonia-nitrogen
  • Mixed liquor suspended solids
  • Pyridine biodegradation
  • Tracer technique

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document


Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free