The utilization of modified phenol-formaldehyde resin wastes in sewage treatment processes

摘要

Phenol-formaldehyde resin wastes were aminated and the resulting anionic polyelectrolytes were successfully used as flocculants,67 or 100 mg/L,for industrial (and also municipal) waste waters.Turbidity of waste waters fell to 50% and even 22% of the original value.Soluble impurities were decreased and quality of the waste waters was improved.