Hussain, Nadeem creator Visvanathan, C. Chairperson Su, W. H. Examination Committee Pandey, P. C. Examination Committee Government of Japan Scholarship Donor text series technical report th Bangkok Asian Institute of Technology 1994 continuing eng 111 leaves This research study is developed in a view of analyzing the extent of pollution load and possibilities for its reduction from a medium scale dyeing industry. Waste audit was used as a tool to highlight the overall pollution load and its individual sources in the dyeing process. Waste audit study revealed that water consumption for yarn and sweater dyeing were 0.23 m3 /Kg and 0.31 m3 /Kg respectively. Quantitative data obtained from water balance showed that 85% of total water input required treatment including 70% coming directly from dyeing hall. Experiments were conducted to investigate the possibility of dyeing process effluent segregation. Results showed that 42% of dyeing process wastewater could be segregated as colorless non polluting stream while the remaining dyeing process effluents need treatment. Possibilities of water reuse were also investigated. Inplant study and water quality parameters pointed out that 5.5% of water supply could be reduced by water reuse. Wastewater treatment study was done for combined wastewater without stream segregation and for colored wastewater obtained after stream segregation using ferrous sulfate, ferrous sulfate with lime and Fenton's Reagent. Results of the treatment study revealed that ferrous sulfate with lime gave more color and COD reduction as compared to ferrous sulfate alone for both combined and colored wastewater. But treatment of combined wastewater with Fenton's Reagent gave the highest color and COD reduction. The treatment cost of Fenton's Reagent was found to be the highest because of high cost of hydrogen peroxide. Hence, wastewater treatment using ferrous sulfate in combination with lime was suggested as optimum one. Cost analysis also showed that proper stream segregation could reduce the treatment cost as compared to treatment cost of combined wastewater without stream segregation. A thesis submitted in partial fulfillment of the requirement for the degree of Master of Engineering, School of Environment, Resources & Development Thesis (M.Eng.) - Asian Institute of Technology,1994 Sewage Purification Environmental protection Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B15622 http://203.159.5.9/ait-thesis/detail.php?q=B15622 230399 20260817172828.0