We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Influence of phenol on cultures of acetate-fed aerobic granular sludge.
- Authors
Liu, Y; Woon, K.-H; Yang, S.-F; Tay, J.-H
- Abstract
Aims: This paper attempts to investigate the inhibition of phenol on the acetate utilization in acetate-fed aerobic granular sludge culture. Methods and Results: Acetate-fed aerobic granules with a mean diameter of 1·0 mm were predeveloped in a column sequencing aerobic sludge blanket reactor. The present study looked into the utilization kinetics of acetate by acetate-fed aerobic granules in the presence of different phenol concentrations ranging from 0 mg l-1 to 50 mg l-1 . For this purpose, batch experiments were conducted at 25 °C, while the initial biomass and acetate concentrations were in a range of 109–186 mg mixed liquor suspended solids (MLSS) l-1 and 185–300 mg acetate-chemical oxygen demand (COD) l-1 . Results showed that the utilization of acetate in the presence of phenol was subject to a zero-order reaction kinetics. The relative phenol concentration in terms of the ratio of initial phenol concentration (C p ) to initial biomass concentration (X 0 ) was used to describe the real inhibitory strength of phenol imposed on acetate-fed aerobic granules. When the C p /X 0 ratio increased from 0 to 0·19 mg phenol mg-1 MLSS, the zero-order reaction rate constant of acetate dropped from 1·15 mg l-1 min-1 to 0·38 mg l-1 min-1 , and a similar trend was also observed in specific oxygen utilization rate. As compared to the control test without addition of phenol, the acetate-COD removal efficiency was reduced by nearly 50% at a C p /X 0 value of 0·19 mg phenol mg-1 MLSS. It was found that biodegradation of phenol was negligible in acetate-fed aerobic granular sludge batch culture. Conclusions: It appears that phenol can seriously repress the utilization of acetate in the acetate-fed aerobic granular sludge batch cultures. A simple zero-order...
- Subjects
PHENOL; SEWAGE sludge; ACETATES
- Publication
Letters in Applied Microbiology, 2002, Vol 35, Issue 2, p162
- ISSN
0266-8254
- Publication type
Article
- DOI
10.1046/j.1472-765X.2002.01154.x