MANTECH is excited to announce that Justin Dickerman will be performing an educational session on peCOD applications in the drinking water industry at this year’s WQTC conference in Toronto! See the session details and abstract below:
Session Title: Optimized Treatment through Source Water Monitoring for Natural Organic Matter
Date/Time: Monday November 12th, 3:15 – 3:30 p.m.
Location: MANTECH Booth 316, Sheraton Centre Toronto
Natural organic matter (NOM) is a complex mixture of organic compounds that are the products of various decomposition and metabolic reactions in the source water and its surrounding watershed. The presence of NOM directly affects drinking water treatment processes; in many source waters NOM can vary greatly both in concentration and specific composition and therefore must be consistently monitored.
Routine NOM monitoring is typically conducted using surrogates such as total organic carbon (TOC), dissolved organic carbon (DOC), ultraviolet absorbance at 254 nm (UV254) and specific ultraviolet absorbance at 254 nm (SUVA). However, these parameters may not provide adequate information on treatment performance and NOM removal in some cases.
The PeCOD® COD method is a new nanotechnology-based photoelectrochemical technique for rapidly determining dissolved COD in natural and wastewater samples. It utilizes the charge originating from oxidizing organic species contained in the sample to measure COD, and therefore generates an accurate measurement of reactive compounds.
The high oxidation potential of the PeCOD® can measure and characterize organics that may not be detected by TOC or UV254, providing a better understanding of NOM removal and DBP formation. As a source monitoring tool, the PeCOD® provides a greater magnitude of change due to increases in NOM when compared to TOC or UV254, allowing operators to make confident decisions on changes in treatment techniques in response to increased NOM events.
Dalhousie University completed a study in 2014 using the PeCOD® to monitor NOM at four surface water treatment plants (Stoddart & Gagnon 2014). It was found that the removal of PeCOD® COD across a biofilter follows a similar trend to TOC and DOC. Additionally, the PeCOD® had an expanded scale of resolution, highlighting its ability to detect reactive organic species.
The University of Massachusetts began a project comparing PeCOD® to traditional monitoring techniques in characterizing NOM in surface water influent to a pilot treatment plant. The first stage of this project focuses on event detection capabilities of PeCOD®, TOC, UV254, and SUVA, while also establishing baseline values for each of the parameters. Initial findings show the PeCOD giving a response significantly greater in magnitude relative to the baseline in comparison to the other techniques.
ASTM International has recently approved the PeCOD® method as a bulk surrogate measure of NOM in freshwater source waters and treated drinking water. The speed of this new technique allows for real-time, continuous organic monitoring to ensure constant compliance with regulations. PeCOD® can be used to predict DBP (disinfection by-products) formation, provide a bulk measurement of NOM, and assist in optimizing coagulation.
View the extended abstract here.
See the WQTC 2018 program here.