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Updated: Jul 11, 2026

Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor
Published on: October 15, 2015
Determination of chemical oxygen demand (COD) using ultrasound digestion and oxidation-reduction potential-based
Hyunook Kim1, Honglae Lim, Mark F Colosimo
1The University of Seoul Department of Environmental Engineering, Seoul, Republic of Korea. h_kim@uos.ac.kr
Abstract:
A new method for determining wastewater chemical oxygen demand (COD) using ultrasonic digestion and titration based on oxidation reduction potential (ORP) was developed. COD values of potassium hydrogen phthalate solution obtained by ultrasonic digestion were well matched with those obtained using Standard Methods. When applied to determine COD of real wastewater collected from a local treatment plant, results from the new method were within 80% to 90% of those obtained using Standard Methods. Nonetheless, the proposed strategy has the potential to be implemented into an online COD analyzing system.
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