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Additional info for Industrial Water Pollution Control
2. Segregation. In a soap and detergent case, clean streams were separated for direct discharge. Concentrated or toxicstreams may be separatedfor separate treatment 3. Disposal. In many cases concentrated wastes can be removed in a semidry state. In the production of ketchup, after cooking and preparation of the product, residue in the kettle bottoms is usually flushed to the sewer. The total discharge BOD and suspended solids can be markedly reduced by removal of this residue in a semidry state for disposal.
A significant reduction in wastewater volume and strength was achieved. Reuse and makeup of sulfide dehairing solutions from tanning liquors have reduced both the volume and strength of wastes from this industry. 14. 0 Possible Estimated Water use change new now Loosens and removes sand Screen 7 and reuse in washer etc. 0 HOlding tank. R POLL UTION CONT RO L Spent caustic in a refinery is an alkaline waste, containing high concentrations of sulfides, mercaptans, and phenolates. Separate treatment of spent caustic may markedly reduce wastewater-treatment costs and can in some cases result in a marketable product In the organic chemicals industry, an example might be drawn from the Union Carbide plant at South Charleston, West Virginia.
In practice, waste minimization opportunities arc limited only by the ingenuity of the generator. In the end, a company looking carefully at bottom-line returns may conclude that the most feasible strategy would be a combination of source reduction and recycling projects. S. 10. In order to implement the program. 11. 12. Pollution reduction can be directly achieved in several ways. 1. Recirculation. In the paperboard industry, white water from a paper machine can be put through a save-all to remove the pulp and fiber and recycled [0 various points in the paper making process.