The increase of biological treatment efficiency in petroleum refinery and petrochemical wastewaters by acclimated microorganisms
NATO Advanced Research Workshop on Biotechnology for Waste Management and Site Restoration, MOL, Belgium, 28 November - 02 December 1994, vol.34, pp.181-186, (Full Text)
- Publication Type: Conference Paper / Full Text
- Volume: 34
- City: MOL
- Country: Belgium
- Page Numbers: pp.181-186
- Dokuz Eylül University Affiliated: Yes
Abstract
Petroleum refinery and petrochemical wastewaters are generally treated by biological activated sludge system after pretreatment and oil separation. However, problems arise in the activated sludge system such as settling and inadequate chemical oxygen demand (COD) removal. For this reason, we isolated and acclimated some microorganisms which degrade these wastewaters efficiently. In this study, we obtained high removal efficiency in different sludge ages by using acclimated activated sludge at a laboratory scale. Biological fluidized bed reactors have high biomass concentrations and resistance to high organic load and optimal fluidization ratios increases the treatment efficiency. In either two systems, we investigated the treatment efficiencies of hydrocarbons degradation for special isolated microorganisms like Pseudomonas and Citrobacter.