Journal
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING
Volume 42, Issue 11, Pages 1665-1670Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/10934520701518190
Keywords
COD determination; ultrasonic digestion; oxidation-reduction potential; process control
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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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