This story was originally published on Facilities Dive. To receive daily news and insights, subscribe to our free daily Facilities Dive newsletter. Researchers have developed an air filter capable of ...

Characteristic of a direct ffiltration system with dual media filters and cationic polyelectrolytes as sole coagulants is the formation off a filtration zone that moves down through the bed. The rate ...

Experiments indicate that direct filtration without sedimentation, when preceded by the use of coagulants and adequate flocculation time, can produce finished water turbidities and particle size ...