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Demonstration and Evaluation of Innovative Wastewater Main Rehabilitation Technologies (WERF Report INFR4R11)
Citation:
Matthews, J. Demonstration and Evaluation of Innovative Wastewater Main Rehabilitation Technologies (WERF Report INFR4R11). Water Environment Research Foundation, Alexandria, VA, 2014.
Impact/Purpose:
More information about the performance, cost, and selection of innovative wastewater rehabilitation technologies, specifically for large-diameter pipes, has been identified as a critical need by the user community so that better-informed decisions are possible. This project and report: •Provides information on the design, installation, and QA/QC procedures for the UV-cured Reline America Blue-Tek™ CIPP liner used to rehabilitate 10-in vitrified clay pipe (VCP) in Frisco, Texas. •Provides guidance on how to mechanically test glass fiber-reinforced UV-cured CIPP liners. •Provides a detailed cost breakdown for the UV-cured CIPP demonstration and technology. •Provides information on the design, installation, and QA/QC procedures for the large diameter Insituform iPlus® Composite WC-CIPP liner used to rehabilitate reinforced concreted pipe (RCP) in Irving, Texas. •Provides guidance on how to mechanically test composite WC-CIPP liners. •Provides a cost breakdown for the large-diameter composite WC-CIPP demonstration and technology.
Description:
The lack of knowledge on the performance of innovative wastewater rehabilitation technologies, specifically for large-diameter pipes, and the limited ability to determine the most cost-effective, long-term rehabilitation methods for wastewater collection systems, has been identified as a critical need. Key stakeholders indicated that several pipe scenarios were of interest for demonstrating innovative wastewater rehabilitation technologies, including those applicable to challenging site conditions such as large diameter pipes (> 48 in or 1,200 mm) and pipes with challenging configurations. This report describes the demonstration and performance evaluation of two emerging wastewater rehabilitation technologies -- ultraviolet light, cured-in-place pipe (UV-CIPP) and water-cured–CIPP (WC-CIPP). In each case, the technologies met the owner’s requirements. Mechanical testing showed that each liner exceeded the minimum design requirements, as well as the increased suggested manufacturer’s values. An additional key lesson learned from the UV-CIPP demonstration was the importance of using the proper test method when evaluating the liner’s structural properties. Fiberglass liners must be tested according to ASTM F2019 which requires a 2-in (50 mm) wide specimen and that must be taken from the circumferential or hoop direction in order to not cut through the fiberglass reinforcement. An additional key lesson learned from the large diameter water-cured (WC)-CIPP demonstration was the importance of proper planning and site access considerations. Careful attention is required to ensure proper and timely preparation before the lining equipment is set up for each installation shot, since many large pieces of equipment are required and access is needed to move the resin tankers in and out during wetout. This project was conducted under a U.S. Environmental Protection Agency (EPA)-Water Environment Research Foundation (WERF) cooperative agreement 83419201 that seeks to evaluate and document performance and/or cost of technologies that have the potential to increase the effectiveness and/or reduce the cost of the operation, maintenance, and renewal of aging water distribution and wastewater conveyance systems. [NOTE: The link below connects to a WERF site where the Final Report can be downloaded for free, after registering at the WERF site. To view the WERF registration link, which is on the WERF home page (www.werf.org), it may be necessary to move the page so the top right corner is visible. For some projects the Executive Summary is available and can be downloaded for free without registering on the WERF site.]
