In-Stream Total Residual Oxidant Detector

To address the Navy’s need for a near-real-time in-stream (NRTIS) total residual oxidant (TRO) detector, Physical Optics Corporation (POC) proposes to develop a new In-Stream Total Residual Oxidant Detector (ISTROD) based on nephelometric, photometric, and deconvolution analysis. The innovation in using wavelength-multiplexed photometry enables the compact (1.5 cubic feet) device to detect different types of oxidants and to determine TRO level from numerical deconvolution analysis continuously and in near real time. Environmentally robust and capable of operating in harsh seawater environment, this system offers high reliability and availability level >3,000 hr and TRO measurement range 500 mg/L with ±5% accuracy. In Phase I, POC will assemble and test a proof-of-concept technology readiness level (TRL)-3 prototype to demonstrate ISTROD efficacy in a laboratory environment, utilizing a model seawater mixture of relevant compositions and bleach solutions over a TRO concentration range of 50 to 500 mg/L. In Phase II, an improved full-scale and stand-alone TRL-7 prototype with controller area network bus (CAN-bus) interface will be built and demonstrated using natural seawater and an electrolytic chlorination device to produced EHCE seawater. This prototype will be coupled to an operating chlorination process in a Navy natural-seawater test facility to prove its performance.