engleski

The use of different reactor systems for biological treatment of petroleum refinery wastewaters

In order to protect the environment and due to the strict regulations, harmful organic and inorganic compounds must be removed from refinery wastewaters. In this paper, the application of different reactor systems for biological treatment of petroleum refinery wastewaters was reviewed and the performance of the different biological treatment processes with suspended and immobilized biomass was described with emphasis on working parameters, such as chemical oxygen demand (COD), organic load, hydraulic retention time, the presence of different carriers and microorganisms, the pH and the working temperature. Furthermore, some combined treatment processes were presented and their use was analysed. According to the review of the literature data, it can be concluded that biological treatment, with the selection of a suitable reactor system, favourable microorganisms and the optimal working parameters, enables very efficient removal of organic substances present in the refinery wastewaters.

biological treatment ; biomass ; hydraulic retention time ; chemical oxygen demand ; refinery wastewater ; reactor systems

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