Treatment of Port Harcourt Refinery Effluent by a Bacterial Consortium Immobilized on Agro-based Bio Carriers
G. C. Iheanacho, A. A. Ibiene, P. O. Okerentugba
Asian Journal of Biotechnology and Bioresource Technology · pp. 1–10 · Published 20 Dec 2019
10.9734/ajb2t/2019/v5i430069Abstract
Discharge of poorly treated refinery wastewater has always been a major environmental challenge. Bacterial immobilization is key to the maintenance of biomass on a contaminated site. In this study, a mixed culture of three bacterial isolates from oil-polluted water: Pseudomonas aeruginosa (MN294989), Bacillus tequilensis (MN294990) and Micrococcus sp. immobilized on Groundnut Shell (GS), Melon Husk (MH) and Sugarcane Bagasse (SB) were employed in the bioremediation of Port Harcourt refinery wastewater. Surface area and pore size distribution of the agro-based bio carriers were suitable for bacteria adhesion. The bacterial isolates were screened for phenol, naphthalene and hydrocarbon utilization. Scanning Electron Microscopy (SEM) was used to ascertain the immobilization of the consortium on the agro-base carriers. A 15-days laboratory-scale treatment of refinery raw wastewater was compared in the immobilised and immobilized consortium. The agro-based residue immobilized consortium enhanced the reduction in BOD5, COD, oil and grease, phenol by 7%, 9%, 30% and 5% respectively compared to the free form of the consortium. This study underscores the role of immobilization in maintaining high bacterial biomass on contaminated site and possible improvement in bioremediation of refinery wastewater.
References (5)
- 1 Immobilization of microbial cells: A promising tool for treatment of toxic pollutants in industrial wastewater [DOI]
- 2 Refinery wastewater biological treatment: A short review
- 3 Oil refinery wastewater treatment in the Niger Delta, Nigeria: current practices, challenges, and recommendations [DOI]
- 4 Oil Spillage and Pollution in Nigeria: Organizational Management and Institutional Framework
- 5 Bioremediation of phenol and naphthalene by Bacillus species and Brachybacterium species isolated from pharma soil sample [DOI]
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