Hybrid-hollow-fiber membrane bioreactor for cometabolic transformation of 4-chlorophenol in the presence of phenol
Li, Yi; Loh, K
| HERO ID | 2906042 |
|---|---|
| In Press | No |
| Year | 2007 |
| Title | Hybrid-hollow-fiber membrane bioreactor for cometabolic transformation of 4-chlorophenol in the presence of phenol |
| Authors | Li, Yi; Loh, K |
| Journal | Journal of Environmental Engineering |
| Volume | 133 |
| Issue | 4 |
| Page Numbers | 404-410 |
| Abstract | Hybrid-hollow-fiber membrane bioreactors were developed for the enhanced cometabolic biotransformation of phenol and 4-chlorophenol (4-cp) by Pseudomonas putida ATCC49451. Bioreactor performance was investigated, compared, and analyzed under batch and continuous operating modes. The spinning solutions contained polysulfone (PS), N-methyl-2-pyrrolidone, and various weight ratios of granular activated carbon (GAC) (GAC: PS of 0, 1:4, and 1:2). The bioreactor fabricated with 1:2 GAC hybrid-hollow-fiber membranes demonstrated the best performance for the removal of phenol and 4-cp, both under batch and continuous operations. Under batch operation, 500 mg L-1 phenol and 4-cp were completely removed within 23 h in the bioreactor, compared with 26 and 30 h for the 1:4 GAC and GAC free bioreactors. Sorption, biotransformation, desorption, and bioregeneration were identified as the four steps for substrate removal during batch operation. The 1:2 GAC hollow-fiber membrane bioreactor also manifested superiority over the other two during continuous operation for start up and the transient phase after shock loadings of the feed. 300 mg L-1 phenol and 4-cp were completely removed in the 1:2 GAC hybrid-hollow-fiber membrane bioreactor whereas 4-cp was not completely removed in the other two bioreactors at a feed rate of 30 mL h(-1). From the experimental results, it was inferred that at steady state, biotransformation was achieved through the dynamic equilibrium among sorption, desorption, and biotransformation rates established within the bioreactors. |
| Doi | 10.1061/(ASCE)0733-9372(2007)133:4(404) |
| Wosid | WOS:000246809200007 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Journal: ISSN: |
| Is Public | Yes |
| Keyword | hybrid method; reactors; transformations; biological treatment; phenol |