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- Title
Microbiological degradation of phenol using two co-aggregating bacterial strains.
- Authors
Zeng, Hong-Yan; Cao, Xiao-Li; Xiong, Long-Bin; Cai, Xi-Ling; Huang, Li-Qun; Zhang, Cun-Ying; Li, Yu-Qin
- Abstract
Phenol biodegradation in an aerobic batch reactor was investigated using mixed two co-aggregating strains ( Flavobacterium sp. and Acetobacter sp.). Response surface methodology by the Box-Behnken model was used to evaluate the optimal cell growth and phenol degradation conditions. The optimum temperature, pH value and inoculum size were found to be 33 °C, 6.06 and 13 %, respectively. In the conditions, phenol degradation rate and biomass were predicted to be 96.97 % and 410.78 mg/L within the range examined, respectively. Less toxic acetaldehyde, ethanol and acetic ether were identified as main intermediate products from the degraded samples using GC-MS. Substrate inhibition was calculated from experimental biomass growth and phenol degradation parameters using the Haldane equation. Kinetic parameters derived from nonlinear regression with correlation factors ( R) were 0.9682 for phenol degradation and 0.9594 for biomass growth, respectively. The phenol concentration to avoid substrate inhibition was 278.17 mg/L.
- Subjects
BIODEGRADATION of phenol; MICROBIOLOGY; PHYSIOLOGIC strain; RESPONSE surfaces (Statistics); DYNAMIC models; ACETALDEHYDE
- Publication
Environmental Earth Sciences, 2014, Vol 71, Issue 3, p1339
- ISSN
1866-6280
- Publication type
Article
- DOI
10.1007/s12665-013-2540-7