CAPACCIO recently worked with a major healthcare facility in Boston to design, oversee the installation, commission, and assist with the initial testing and start-up of a new mercury removal system for one of their clinical and research buildings. The Industrial Wastewater Pretreatment System (IWPS) consisted of initial pH neutralization, equalization, particulate filtration, granular activated carbon adsorption, and final pH adjustment.

As part of the project, CAPACCIO conducted a comprehensive review of the existing IWPS and infrastructure. This was accomplished by reviewing available system and analytical data, flow information, treatability studies, and mercury mitigation reports for the previous two years. Based on this data, CAPACCIO developed a conceptual design for the replacement of the existing IWPS with the new IWPS.

To successfully treat the laboratory wastewater and ensure that it met the stringent effluent limit requirements, CAPACCIO selected a treatment method that could handle the predominant species of mercury found in the waste stream. CAPACCIO’s experience with pilot testing was especially important in determining the predominant species and verifying that the treatment scheme chosen was effective.

Because the IWPS was initially built “off-line” and before existing facility flows could be treated by this system, the existing waste collection system needed to be modified to connect to the new IWPS. Prior to this “connection”, the new IWPS needed to undergo a series of inspections, dry tests, wet tests with potable water, and start-up procedures. Once the IWPS was capable of receiving lab wastes, the connection was made and additional tests were conducted to determine the functionality and efficacy of the IWPS.

As part of the IWPS start-up and wet testing prior to the system turnover to the client, a formal commissioning process was required. The commissioning process was intended to verify that the system had been installed and was fully operational in accordance with the construction design plans and specifications. CAPACCIO assisted with the commissioning scope which included 1) pre-connection phase testing, 2) post-connection phase testing, and 3) operational documentation.

Overall, CAPACCIO brought tremendous value to this project through their expertise in the pilot testing phase during the design process and how it led to the full-scale system design. The planning and coordination process and other challenges that surfaced during the procurement, construction, and installation process were also handled efficiently and effectively by CAPACCIO and resulted in a state-of-the-art mercury removal system.


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