| 摘要 |
The present invention relates to a process for the purification of effluent which results in the textile, paper and leather industries and in the manufacture of dyestuffs, and which contains water-soluble, anionic dyestuffs or optical brighteners, the said process comprising the addition of a water-soluble formaldehyde condensation product to the said effluent and the subsequent removal of the occurring flocculate from the effluent.
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