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Industrial Process & Specialty > 180 F Bleach / Scour Rinsewater Reuse

Cost Reduction Analysis

• A textile bleaching, dyeing, and finishing plant was periodically exceeding their permitted wastewater flow on an intermitent basis.
• The plant had plans to increase production during the next two years.
• An increase in permitted wastewater flow was not likely due to discharge limitations placed on the POTW which the plant discharged into.
• This prompted an exploration of ways to reduce water consumption to allow for production increases.
• The bleaching and scouring processes that process cotton fabric were concluded to be a highly probable area for water reuse due to their consistent wastewater quality, continuous flow rates, and minimal make-up of contaminants.
• Membrane technology was piloted to determine the feasibility. Below listed are annualized cost reductions that could be achieved.

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System Parameters 90% Recovery 70oF Incoming Water Temp 180oF Wastewater Temp w/ 10oF	Annual Savings Water $27,235 Fuel $91,06l Wastewater $55,566 Total Savings $173,865
Annual Costs Power $9,400 Membrane Replacemt. (assuming 3yr. life) $8,400 Prefilters $13,600 Cleaning $3,230 Operation & Maint. $9,250 Parts $3,350 Activated Carbon $1,125 Catalyst Coating $10,000 Total Costs $58,355	NET ANNUAL SAVINGS = $115,510
Examples of Cost Reduction Analysis Oily Wastewater Reuse Dyeing Wastewater Reuse Cold Bleach Rinse Water Reuse 180oF Bleach/Scour Rinsewater Reuse

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