Influence of gamma radiation in combination with biocides on sulfur reducing bacteria

الملخص EN

The counts of sulfur reducing bacteria (SRB) of the water samples collected from a gas treatment plant of a petroleum field in middle delta-Egypt were determined.

The data showed a significant counts of (SRB) in the collected samples and there was a mild increase in the bacterial counts through the system stages which revealed the presence of appropriate conditions required for the growth of (SRB) microflora.

Three groups of non-oxidizing biocides were screened for their bactericidal activities.

It was found that the biocides IA and IB were slightly superior in respect to the antibacterial efficacy compared to their analogues of aldehydic and cationic forms, respectively.

So, these biocides were selected for the study of the combined treatment with gamma radiation to maximize the efficiency on sulfate reducing bacteria treatment using the minimum effective dose of both radiation and biocides, and to eliminate their negative impacts, This treatment demonstrated that it is possible to minimize the amount of chemical biocides that are injected into targeted systems and released to the environment by exposing the waste water to ionizing radiation after biocides addition.