Biodegradation of phenolics in oil industry wastewater
Abstract
Practical methods to isolate, adapt and propagate phenol biodegradatíng microorganisms were established. Fifteen different microorganism groups were obtained, capable of eliminating phenol contained in production water, sour water and waste water from Barracaberme¡a' s refinery, and dehydration water from heavy oíl-in-water emulsions. Elimination efficiencies higher than 95% in periods of time shorter than 24 h were achieved at laborotory and pilot plant scales. A continuous system using this technology was successfully implemented in April, 1994 for the treatment of waste water frorn Colombia's biggest refinery. Existing estabilizing pools were converted into bioreactors capable of handling water flow rates between 16.000 and 32.000 m3d·1. Efficiencies close to 95% have been obtained under controlled acidity, aeration and flow rate conditions. This technology is being implemented in other Ecopetrol refíneríes and production fields.
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