2.3. Analysis
COD analysis was conducted by reactor digestion HACH method 8000, which was approved by
USEPA as per Federal Register, April 21, 1980, 45 (78) 26811-26812, using high range vial (0-1500
mg/L). HACH methods are described in detail in
the HACH' Odyssey DR/2400 spectrophotometer
manual