| 摘要 |
<p>Process for the treatment of aqueous effluents from the production of epoxy resins, which effluents contain as their main impurities chlorohydrins, glycidol, isopropyl alcohol and sodium chloride, which process comprises the following steps: (a) hydrolytic treatmnent of the effluent under alcaline conditions, until the effluent's content of epichlorohydrin in reduced down to values of about 75 ppm, and the effluent's glycidol content is reduced to values lower than about 4,000 ppm; (b) removal of about 90% of sodium chloride from the hydrolysed effluent;; and (c) anaerobic digestion of the hydrolysed, sodium chloride-deprived effluent, after preliminary dilution, neutralization and integration with nitrogen and phosphorus sources. The (b) step can be carried out by means of a process of concentration of the effluent, in order to cause sodium chloride to precipitate, or by submitting the same effluent to a treatment of electrodialysis.</p> |
