ConocoPhillips - Westlake

ConocoPhillips - Westlake

SCOPE

When Conoco’s water and wastewater operations partner was in financial difficulty and needing to divest some of its holdings, Veolia purchased its 50% interest in HydroServe Westlake LLC and took over their contract with Phillips 66 at this location. Veolia has been carrying out the remaining 28 years of its predecessor’s 30-year agreement to provide water production and wastewater treatment services to the Conoco refinery.

ConocoPhillips Westlake
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The 7-MGD surface water treatment plant features lamella clarification, counter current mixed media filtration and chemical addition, while the 7-MGD wastewater treatment facility uses secondary and tertiary processes. This system includes cooling towers, equalization tanks, dual-train activated sludge treatment, clarification and thickening through dissolved air floatation. Wastewater sludge is dewatered using plate and frame presses, compressed air and chemical addition. 

CHALLENGE

Veolia was challenged to provide water production and wastewater treatment services to Phillips 66, Inc.’s Lake Charles refinery at Westlake. The agreement included the purchase of a 50% interest in HydroServe, LLC – a joint venture with Conoco that includes the ownership of a 3.6MGD surface water treatment plant and a 7-MGD wastewater treatment facility. This is Phillips 66 largest refinery and processes approximately 10% of the lubricating base oil production in the U.S. This project ranks as one of the chemical industry’s largest industrial outsourcing agreements for water and wastewater treatment. 

SOLUTION

Veolia successfully treats the flow through secondary processes to return the water to discharge quality. Following dual-train activated sludge treatment and clarification, the final effluent is discharged to the river. Sludge is chemically conditioned, thickened through dissolved air floatation, dewatered on a belt and frame press and then landfilled. 

RESULTS

The Veolia-managed water and wastewater facility at the Westlake complex had a zero recordable incidence rate (with 24,048 hours worked as of 2012) and 13 years with no LTA or RCA.
 
Veolia achieved the “contractor award for meritorious safety performance” awarded by OSHA based on the achievements of employees’ safety records. Veolia successfully minimized their total recordable incident rate for the 2012 calendar year while working over 20,000 hours at each of Conoco’s sites. Veolia’s work in the Conoco/Hydroserve project also received this honor in 2002, 2004, and 2006 through 2012. The remaining 15 year agreement between Veolia and Westlake Chemical is expected to save Conoco $1 million annually in operating costs. 
 

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