The document presents a study on treating textile wastewater using chlorination. It describes installing a packed column to decolorize wastewater with chlorine gas. Water samples were tested for pH, TDS, TSS and COD before and after treatment. The results showed pH values between 8-9, and decreases in TDS, TSS and COD after treatment, indicating the process was effective at reducing contaminants. Recommendations include modifying the system for continuous operation and adding a backwash process for the column.