The clip shows solids and oil present in the process fluids passing through an Induced Gas Floatation (IGF) tank.
Root Cause analysis to identify sludge build-up in IGF tank - onshore Far East
Poor fluid separation in Induced Gas Flotation (IGF) tank.
On-site fluid analysis using specialised equipment to monitor actual particle sizes during a set time period to determine whether chemicals would improve the separation/residence time.
The on-site study identified that the IGF was not working efficiently due to small particles of iron sulphide generated by sulphate-reducing bacteria (SRB). This iron sulphide was becoming coated in oil, to create what is known as schmoo. Biocides were recommended to stop microorganisms generating iron sulphide, thus solving the problem at the root and stopping more schmoo being formed, allowing the oil droplets to coagulate and be removed by the IGF.