November 2009

Bonus Report: Water Management

Wastewater treatment: A refinery case study

This refiner used an in-house initiative to troubleshoot plant-wide process water problems

  All refineries produce wastewater with varying contaminant levels that require further treatment before discharge. Because wastewaters are collected from various processes, problems do arise. Hydrocarbon-processing facilities must comply with local and federal standards on water quality exiting the facility. Exceeding such limits will trigger an incident and fine in most cases. In this case history, the Attock refinery used two wastewater streams: oily and non-oily to carry process wasterwater to treatment facilities. Unfortunately, this refiner exceeded discharge limits for the facility and needed a plan to handle high pH and chemical oxygen demand (COD) from spent caustic and oi

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