Determination of Textile Dyeing Wastewater COD Components by Comparison with Respirometry and Full-scale Data

A Modified Activated Sludge Model No.1 (M-ASM1), including six COD components (S I , S S , X I , X S , X H and S O ) and three biochemical processes (aerobic growth of heterotrophs, aerobic decay of heterotrophs and hydrolysis of entrapped organics) was used to simulate the anaerobic hydrolysis–aeration–sedimentation treatment series in a fullscale textile dyeing wastewater treatment plant (WWTP) with an influent flow rate of 200,000 m 3 /d. Using a respirometry method, the influent COD components of the WWTP activated sludge system were estimated. Then, calibration equations were set up depending on the full-scale treatment plant running data in order to calibrate the measurement results. This paper indicates that the influent COD components of a low biodegradability wastewater can be estimated using a respirometry method coupled with a calibration procedure based on full-scale plant running data.