Treatment of Textile Waste Liquors

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Abstract
The character of textile waste liquors and methods that can be employed for their purification are discussed. Although the examples are based largely on cotton processing, the methods are applicable generally. The need for mixing and balancing waste liquors is emphasised. Methods of biochemical treatment are described with some indication of relative costs. The method usually used to remove suspended solids is described briefly, and the effects of oxidising and reducing substances on the biochemical treatment are discussed. The ease of treatment of effluents containing surface‐active agents depends on whether the agent is ‘hard’ or ‘soft’, i.e. whether the agent has a low or high BOD. If the waste is discharged to a sewer, the treatment costs depend on the size of the community in which the works is situated. The re‐use of part of the effluent from textile processes and the analytical tests made on the effluent are discussed briefly.

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