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Services Provided
ü Treatability, Pilot Testing
Technologies Used
ü Chemical Pretreatment ü Microfiltration ü Activated Carbon Absorption
ü Filter Press Dewatering
Relevance
ü Design-Build-Operate (Pilot Scale) ü Wastewater Treatment System ü Government Facility
Accomplishments
ü Successful pilot-scale treatability
studies leading to full-scale design
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Title: Operation of Chromium Precipitation, Micro-filtration, and Filter Press Systems
Client: NASA Johnson Space Center Houston, Texas
ETAS Corporation was contracted to design a full-scale treatment system for treating waste streams resulting from
photographic and electroplating operations to meet NPDES discharge criteria. To achieve project objectives, a 5 gpm pilot-scale wastewater treatment system was designed, fabricated,
tested, and operated to perform pre-design treatability studies. This skid-mounted system consisted of a chemical precipitation reactor, a microfiltration unit, followed by
activated carbon polishing, and a filter press for sludge dewatering. A total of 28 bench tests and 6 pilot treatability tests were performed to evaluate the conceptual design. The
results confirmed that NASA's photographic and electroplating rinse water could be treated chemically followed by solid-liquid separation and sludge dewatering. Based on
the treatability study results, ETAS Corporation then developed the full-scale treatment system engineering designs, including all engineering
drawings and specifications. The specifications described the general performance standards and provided a listing of equipment to be provided by sellers, equipment specifications,
instrumentation and controls, skid structure, cleaning, painting, tests and inspection, shipment procedures, and QA/QC inspection procedures.
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