| Autor: |
Yusuf, Rafiu Olasunkanmi, Noor, Zainura Zainon, Hassan, Mohd Ariffin Abu, Agarry, Samuel Enahoro, Solomon, Bamidele Ogbe |
| Zdroj: |
Desalination & Water Treatment; April 2013, Vol. 51 p3189-3195, 7p |
| Abstrakt: |
Tannery wastewater treatment using two isolated micro-organisms (Bacillus subtilisand Pseudomonas fragii) has been investigated in the present study. The growth patterns, pH normalisation and the abilities of these micro-organisms to reduce the concentrations of chemical oxygen demand (COD), total suspended solids (TSS) and chloride were studied using the shake flask apparatus. The specific growth rate and biomass concentration of B. subtilisand P. fragiiwere observed 0.138 h-1and 3.01 mg/l and 0.051 h-1and 2.34 mg/l, respectively, after 84 h. Both micro-organisms normalised pH of the wastewater. COD removal efficiency for B. subtiliswas 87.6% while that of P. fragiiwas 85.2%. For TSS, B. subtiliscaused a reduction of 91.7% (from 876 mg/l to 73 mg/l), while P. fragiireduced the solid concentration from 876 mg/l to 98 mg/l (88.8%). B. subtiliscould only achieve 48.5% reduction in chloride concentration (from 127.08 mg/l to 65.39 mg/l compared to a reduction of 54.6% (from 127.08 mg/l to 57.72 mg/l) for P. fragii. From the results, it can be said that the bacteria present in tannery effluents have significant potential in treatment of tannery wastewater. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
