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Industrial
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Wastewater Treatment Process
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Western Pennsylvania Specialty Can Manufacturer
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WESTERN PENNSYLVANIA SPECIALTY CAN MANUFACTURER—In the process of manufacturing specialty extruded aluminum cans, chemical etchants are used to clean the can surface after extrusion. The cans are then washed to remove the etchant. After the cans are painted, they are washed and dried before packaging. Chester Engineers was called in to assist the company in developing a wastewater process to remove certain heavy metals and solids from their wastewater to meet the requirements of both EPA and the local municipality. The project resulted in Chester providing the project on a design-build basis.
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Whitmoyer Laboratories Superfund Site
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Dow Chemical Company
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Due to significant groundwater contamination, the Whitmoyer Laboratories site became designated as a Superfund Site by the U.S. EPA. Because of Chester Engineer's unique ability to provide a complete total solution, i.e. one stop shop, Chester was hired in 1997 to design, build, and operate a groundwater treatment system, and to provide technical support and groundwater compliance monitoring.
The project involved design/build services for a 360-gallon per minute treatment plant, 14 extraction wells and conveyance piping network. The treatment system is designed to provide for the removal of metals, volatile and semi-volatile organic contaminants such as arsenic, aniline, TCE and BTEX. Treatment involves the use of an iron co-precipitation/adsorption process, as well as a carbon adsorption system for the removal of volatile and semi-volatile organic contaminants. This system also includes a filter press for dewatering of solids that incorporates proprietary technology that dewaters the sludge more thoroughly, resulting in fewer solids and lower operating and disposal costs. The resultant sludge is sent to a nearby landfill as non-hazardous waste. Following treatment, the groundwater is returned to the environment via discharge into an adjacent creek, under the limitations of an NPDES type of permit. To date, Chester continues to provide sampling, monitoring and reporting services for groundwater extraction and treatment systems at the Whitmoyer Laboratories Superfund Site since plant start-up in 1998.
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Water Conveyance Systems Design -- Northern West Virginia
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Confidential Diversified Energy Producer
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The West Virginia Department of Environmental Protection issued an Administrative Order to a major diversified energy producer regarding the management of NPDES permitted discharges at mining facilities in Northern West Virginia. The Administrative Order requires that the discharged water receive advanced treatment for removal of Total Dissolved Solids (TDS). It is proposed that one central treatment facility, encompassing flows from the six Monongahela River Basin facility outfalls noted in the Administrative Order, is to be constructed. This central treatment facility has been designated the Northern West Virginia Water Treatment Facility (NWVWTF).
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Asphaltene Removal in Oil Refinery's Wastewater
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Major North American Oil Refinery
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This oil refiner contracted with Chester Engineers to discuss the oil/solids at their existing wastewater treatment facility. The issue was two-fold as the oil refiner had first increased their production from 75,000 barrels per day to 120,000 barrels per day thus stressing the hydraulic capacity of the existing wastewater treatment plant (WWTP). Secondly, the frequency of processing heavy/sour Canadian crude blends had increased over nearly the same duration thus increasing the contaminant and in particular the asphaltene loadings through the wastewater treatment plant. The combination of these two influences had substantially increased upsets in the WWTP and the potential for violations.
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