444198 Navigating through Refinery Wastewater Treatment Processes and Plant Configurations

Wednesday, April 13, 2016: 9:06 AM
337B (Hilton Americas - Houston)
Carlos D. Claros, Water Services Group, CDM Smith, Houston, TX

Refineries deal with a wide range of environmental compliance concerns encompassing wastewater discharges, air pollutant emissions and solid waste. Refineries must comply with stringent effluent discharge limitations which require extensive level of treatment and monitoring. Effluent discharges to surface water typically must pass Whole Effluent Toxicity (WET) testing and meet very low levels of heavy metals and organics constituents. Some refineries discharge to Publicly-Owned Treatment Works (POTW), which may impose less stringent limits, requiring varying levels of pretreatment and monitoring. Treatment processes used in refineries include oil water separators, dissolve air or gas floatation, activated sludge, nitrification-denitrification, selenium removal, filtration, adsorption and membrane processes. These processes generate residual sludge that needs to be dewatered and disposed.  Control of hazardous air pollutants from treatment units is also an important consideration due to VOC emissions limitations.  This session will present an overview of wastewater treatment processes and configurations as well as air emissions treatment utilized in refineries.

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