Bae Jung
The determination of inert Chemical Oxygen Demand from different dyestuffs used in textile industries is essential for assessing the overall environmental impact of textile dyeing processes. Inert COD refers to the portion of COD that does not contribute to the biodegradability of the dye and remains non-biodegradable or recalcitrant. It provides valuable insights into the persistence and potential long-term effects of dyestuffs in wastewater treatment systems and the environment. To determine the inert COD from different dyestuffs, several analytical methods can be employed. One commonly used method is the measurement of COD before and after the biodegradation process. The difference between the initial COD and the COD remaining after biodegradation represents the inert COD fraction. This can be achieved through laboratory-scale batch tests or continuous-flow systems, where dyestuffs are subjected to specific environmental conditions and monitored for COD changes over time. Another approach is the use of advanced analytical techniques, such as High-Performance Liquid Chromatography (HPLC) coupled with mass spectrometry (MS). This allows for the identification and quantification of specific chemical compounds in dyestuffs, including those that contribute to the inert COD fraction. By analyzing the chemical composition of dyestuffs, it becomes possible to determine their potential recalcitrant components and assess their environmental persistence.
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