produced water

This study was aimed at monitoring the quality of produced water from a flow station waste pit located in Ologbo in Edo State of Nigeria, in order to ascertain the levels of compliance to environmental standards. Samples were analyzed for physicochemical, polycyclic aromatic hydrocarbons and microbiological qualities adopting standard analytical procedures.

Phylogenetic and functional gene analysis of sulphate-reducing bacteria (SRB) from crude oil and produced water was carried out using molecular methods. The concentration of hydrogen sulphide (H2S) produced by SRB, as an indication of SRB presence, was determined using spectrophotometric sulphide assay. More H2S was observed to be produced at 55 ˚C than at 30 ˚C, with sample B found to produce more H2S at these temperatures than sample A. This implies more SRB contamination in sample B, possibly from subterranean water.